# Renishaw NC4+ Blue Practical Guide for Installation, Calibration, and Maintenance of Laser Alignment Instrument

> **Document Version**: V1.0
> **Compatible Systems**: FANUC / MITSUBISHI MELDAS And compatibility CNC system
> **Applicable Products**: Renishaw NC4+ Blue Series non-contact laser tool setter
> **Reference Manual**: NC4+ Blue Installation Guide (Renishaw)、NC4+ Blue Data Sheet、NCTS Programming Manual H-2000-6656-19-B、NCi-6 Interface Installation Guide H-6516-8500
> **Prepared by**: Ningbo Jiangce Technology Co., Ltd Technical Department
> **Release Date**: 2026-07-13

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## catalogue

1. [Overview and Safety Statement](#1-Overview and Safety Statement)
2. [NC4+ Blue Hardware Explanation and Selection](#2-nc4-blue-Hardware Explanation and Selection)
3. [NCi-6 Interface unit and working mode](#3-nci-6-Interface unit and working mode)
4. [Gas system and installation preparation](#4-Gas system and installation preparation)
5. [Mechanical installation and wiring](#5-Mechanical installation and wiring)
6. [Laser beam alignment（O9860）](#6-Align the laser beam with o9860)
7. [System calibration process（O9861）](#7-System calibration process o9861)
8. [Macro Programming Reference](#8-Macro Programming Reference)
9. [Daily maintenance and upkeep](#9-Daily maintenance and upkeep)
10. [Common troubleshooting and diagnosis](#10-Common troubleshooting and diagnosis)
11. [Best Practice for Accuracy](#11-Best Practice for Accuracy)
12. [Conclusion and Reference Documents](#12-Conclusion and Reference Documents)

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## 1. Overview and Safety Statement

### 1.1 What is NC4+ Blue

Renishaw NC4+ Blue The series non-contact laser tool setter is designed specifically for vertical machining centers、Horizontal machining center、High precision design of composite five axis machine tools and large gantry machining centers、High speed non-contact tool alignment and tool breakage detection system。Compared to traditional contact type tool presetters（如 TS27R、RTS、OTS）Different measurement methods relying on mechanical triggering，NC4+ Blue Adopting the principle of laser beam passing detection——When the rotating tool passes through the laser beam，The system detects the moment when the beam is cut off，Thus accurately determining the geometric dimensions and position of the cutting tool。

NC4+ Blue The core technology upgrade lies in the adoption of **405 nm Blue laser**（Compared to the previous generation NC4 的 670 nm Red laser），This wavelength of blue light has significantly better penetration and anti-interference ability in cutting fluid mist and metal chip environments。The short wavelength characteristic of blue laser makes it scatter less when encountering droplets and dust，More stable signal。all NC4+ Blue All comply with Class 2 Laser Product Standards（IEC 60825-1:2014），The maximum output power is less than 1 mW，Safe for operators under normal usage conditions。

### 1.2 Applicable scenarios

NC4+ Blue The series covers the full spectrum of requirements from micro precision machining to large-scale mold processing：

– **F100-10**（beam Ø5 μm）：Suitable for micro drill bits（Ø0.05 mm below）、Micro milling cutter、Extreme precision scenarios such as clock component processing
– **F100**（beam Ø15 μm）：Suitable for precision molds、Detection of small cutting tools such as medical devices
– **F115**（beam Ø30 μm）：General configuration of standard vertical machining center，Balancing precision and universal processing
– **F145**（beam Ø50 μm）：Optimal selection of horizontal machining center and universal milling
– **F230**（beam Ø100 μm）：Large scale Lijia/Horizontal Machining Center，Suitable for medium and above diameter cutting tools
This guide is based on Renishaw’s official technical manual（NC4+ Blue Installation Guide and NCTS Programming Manual H-2000-6656-19-B），Based on the technical team’s years of on-site debugging experience, organize and organize，Intended to provide complete installation for equipment installation and commissioning engineers and on-site maintenance personnel、Calibration、Maintenance and troubleshooting reference。

### 1.2 Safety precautions and disclaimer

The numerical control system parameters and macro program calls involved in this article（O9860/O9861/O9862 等）All are Renishaw standard non-contact tool macro program logic。Due to various machine tool manufacturers（Mazak、Demage、Muye、Haas and domestic brands）的 PLC Ladder diagram control logic、There are differences in the address and coordinate system settings of secondary development variables，**Before debugging or running any calibration macro program on the first machine，Please strictly follow the following foolproof measures：**

1. Switch the machine tool to「dry run（Dry Run）」pattern，And quickly move the channel magnification（G00）restricted to 5% below。
2. Closely observe the cutting tools and NC4+ Blue The direction of relative motion of the body，Do not leave your hands for single segment execution（Single Block）With the emergency stop button。
3. **Laser Safety**：NC4+ Blue 为 Class 2 Laser products（405 nm，< 1 mW）。Do not look directly at the laser beam，Ensure that the light beam is not reflected by the reflective surface inside the machining center（If the workpiece has already been machined、Mirror blade）Reflected to the eyes。Renishaw is Tx Laser warning labels are permanently affixed on both sides of the launch head（BS EN 60825-1:2014 requirement），Accompanied by an adhesive warning label，Suggest sticking it in a prominent position outside the machine tool。
4. 在 NCi-6 Before performing any wiring or maintenance operations on the interface unit，Be sure to cut off the power supply。
5. Before cleaning optical lenses, the power must be cut off and the air pressure must be adjusted to zero。

The technical information provided is only for industry experience exchange，Physical collision caused by directly copying code or parameters、Any legal and economic responsibility shall be borne for the scrapping of workpieces。

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## 2. NC4+ Blue Hardware Explanation and Selection

### 2.1 Complete Model Parameter Comparison Table

NC4+ Blue The model system of the series「F+Numerical」naming，Numerical value and beam projection interval（B Size，Tx 与 Rx spacing）There is a corresponding relationship，unit mm。Each model’s B The dimensions are shown in the table below：

| model | Beam diameter | Beam spacing B | Repetitive positioning accuracy (2σ) | Minimum detectable tool | Applicable model reference |
|:—-|:——–|:———-|:—————–|:————-|:———–|
| F100-10 | Ø5 μm (197 μin) | 140.0 mm | ±0.10 μm (4 μin) | Ø5 μm | Micro machining center |
| F100 | Ø15 μm (591 μin) | 140.0 mm | ±0.10 μm (4 μin) | Ø15 μm | Precision machining center |
| F115 | Ø30 μm (1181 μin) | 155.0 mm | ±0.50 μm (20 μin) | Ø30 μm | Standard vertical machining center |
| F145 | Ø50 μm (1968 μin) | 185.0 mm | ±0.50 μm (20 μin) | Ø50 μm | Standard vertical/Horizontal machining center |
| F230 | Ø100 μm (3937 μin) | 270.0 mm | ±0.75 μm (30 μin) | Ø100 μm | Large vertical/Horizontal machining center |
| F300 | Ø200 μm (7874 μin) | 340.0 mm | ±0.75 μm (30 μin) | Ø200 μm | Longmen machining center |

**Repetitive accuracy description**：The precision values in the table are ± 值，Annotation 2σ Statistical standards。This is the nominal value of Renishaw under standard testing conditions（Standard Core Rod、Standard feed rate、Standard temperature conditions）。Due to the influence of mechanical accuracy and environmental factors on actual machine tools，The comprehensive cutting accuracy is usually lower than the nominal value。

### 2.2 Detailed explanation of hardware composition

NC4+ Blue The ontology consists of the following core components：

**Launch head（Transmitter Head, Tx）**：
– Blue semiconductor laser（wavelength 405 nm，Maximum output power < 1 mW）
– MicroHole™ Micro hole light outlet（The aperture varies depending on the model，F100-10 Minimum aperture）
– PassiveSeal™ Passive sealing mechanism（Automatically shut down when the gas source is interrupted，Protecting the optical cavity）
– Status LED Indicator light（blue/violet/red，Used for status diagnosis）
– Adjustable pitch（Pitch）And rotation（Rotation）Institution

**Receiver Head（Receiver Head, Rx）**：
– High sensitivity photodetector
– MicroHole Light inlet
– PassiveSeal Passive sealing mechanism
– Status LED Indicator light
– Analog signal output（two routes，Used for voltage measurement and diagnosis）

**Air curtain protection system（Barrier Air）**：
– 从 Tx 和 Rx The clean compressed air continuously sprayed from the front end forms an air curtain
– Effectively blocking cutting fluid mist and metal shavings from contacting optical lenses
– When the gas source is interrupted PassiveSeal Auto-activation，seal MicroHole Protecting the optical cavity

**Blowing System（Air Blast）**：
– located in Tx Below the launch head
– Before measurement/Spray high-pressure air onto the surface of the cutting tool in the middle direction，Blow away cutting fluid and chips from the tool
– Usually, it is operated through solenoid valves M code control
– Adjustable blowing pressure，typical value 0.3~0.6 MPa

**Install the adjustment plate（Mounting/Adjuster Plate）**：
– Provide X/Y/Z Fine adjustment function in three-axis direction
– F100 The system uses a small adjustment board（45.0 mm 宽）
– F115/F145/F230/F300 The system uses a large adjustment board（55.0 mm 宽）
– Including three M4 Screw holes and one M10（或 M12）bolt hole

**Dust proof panel（Access Panel）**：
– Detachable panel，Internally containing MicroHole microporous
– The model identification and laser safety warning symbol are printed on the outside of the panel
– Disassembly requires a specialized needle wrench（Pin Spanner）

### 2.3 Selection Decision Reference

When selecting, it is not advisable to rely solely on the size of the machine tool，The following factors also need to be considered：

### 2.4 Summary of overall technical specifications

**Electrical parameters**：

**environmental parameters**：

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## 3. NCi-6 Interface unit and working mode

### 3.1 NCi-6 Overview of Interface Unit

NCi-6 是 NC4+ Blue The signal processing and output center of the system，installed in CNC Inside the control cabinet，Stay away from electromagnetic interference sources such as transformers and servo drives。Its core function is to NC4+ Blue Tx/Rx Convert analog signals into CNC High speed switch signal recognizable by the controller（SSR Output）。

**Key features of interface unit hardware**：

### 3.2 Detailed explanation of four working modes

NCi-6 The interface unit provides four working modes，Select through hardware switches and software coordination：

**pattern 1：Tool Set 1（Tool setting mode 1）—— Standard Mode**

– Signal triggered logic：**亮→暗**（When the tool enters the beam of light SSR conduct）
– characteristics：The fastest response time，No additional signal filtering
– Applicable：In dry cutting environments or environments with very little cutting fluid
– Configuration：NCi-6 On board switch selection，Cooperate with software settings
– **Precautions**：In this mode，Cutting fluid droplets may generate false triggering signals when passing through the beam of light，Therefore, it is not recommended to use it in environments where a large amount of cutting fluid is sprayed

**pattern 2：Tool Set 2（Tool setting mode 2）—— Wet cutting recommendation mode**

– Signal triggered logic：also**亮→暗**（When the tool enters the beam of light SSR conduct），But with built-in droplet suppression algorithm——Integrate and filter the amplitude and duration of the occluded signal，Transient obstruction caused by droplets is filtered，Only continuous occlusion that meets the characteristics of the physical tool is locked and triggered
– characteristics：Built in droplet suppression（Drip Rejection）Algorithm，Can effectively filter out false triggering caused by cutting fluid droplets passing through the beam of light
– Applicable：A large amount of cutting fluid is sprayed into the environment、Wet chip environment、Minimum Quantity Lubrication（MQL）environment
– **Renishaw Recommended**：Prioritize use in all scenarios where cutting fluid droplets may occur Tool Set 2
– If none M Code available or unable to implement Tool Set 2，available Tool Set 1 And enable droplet suppression mode（Through NCi-6 On board switch selection）

**pattern 3：Latch（Lock mode）—— contour/Special for radius measurement**

– Trigger logic：First trigger, latch signal，maintain SSR Conductive state，Until the controller issues a reset command
– Applicable：cooperate, coordinate, collaborate O9865（Tool contour detection）和 O9867（Arc radius measurement）Use
– characteristics：Maintain signal lock in complex multi axis linkage measurement，Prevent reading uncertainty caused by signal jitter
– Exit：Automatically reset after executing the contour measurement cycle

**pattern 4：Tool Break（Broken knife detection mode）—— Specialized for high-speed detection**

– Trigger logic：Optimizing signal processing for high-speed rotating cutting tools
– Applicable：cooperate, coordinate, collaborate O9863（Tool breakage detection for milling cutters）和 O9866（Solid tool breakage detection）Use
– characteristics：The signal has undergone special optimization processing，Suitable for high speeds（thousands rpm）Quickly determine if the tool is broken
– Attention：The tool breakage detection is usually above the tip of the tool 3 mm Go ahead，Not the position of the blade tip

### 3.3 NCi-6 DIP switch configuration

NCi-6 There is a group on the front panel of the interface unit DIP switch（SW1），Used to configure the working parameters of the system。Correctly understanding the function of each switch is a key step in installation and debugging：

| Switch Number | function | On Position | Off Position |
|:——–|:—-|:——-|:——–|
| SW1-1 | SSR output mode | Normally Open（NO） | normally closed（NC） |
| SW1-2 | NC Setup Mode | Setup Mode（Used for alignment/Diagnosis） | Normal operating mode |
| SW1-3 | Droplet inhibition | Enable | Disable |
| SW1-4 | Off | Standard measurement mode（Tool Set 1 或 Tool Set 2，Selected by software） |
| SW1-4 | On | latch（Latch）Mode or high-speed tool breakage detection optimization mode |

**Standard Configuration（Most scenes）**：
– SW1-1：Off（normally closed——Signal disconnection=Not triggered，Safety First）
– SW1-2：Off（Normal operation），align/Temporarily dial to during diagnosis On
– SW1-3：On（Enable droplet suppression，Recommend always turning on）
– SW1-4：According to the required mode and software settings

**Important operation reminder**：After cleaning the lens or reconnecting the power supply，将 SW1-2 Dial to On Maintain agreement 5 Call back in seconds Off，This operation triggers NC4+ Blue Automatic gain adjustment（Auto Gain Adjustment），Re match the system with the current optical conditions。

### 3.4 TSM1 与 TSM2 In depth comparison

「TSM1 vs TSM2」是 NC4+ Blue One of the most common problems encountered during use，Understanding the differences between the two is crucial for ensuring measurement stability：

**Engineering Tips**：If the current processing scenario is uncertain which mode to choose，Suggest setting it as TSM2。Based on actual on-site experience，TSM2 In most cases CNC More stable performance in machining center environment——Because almost all modern machining centers use cutting fluids，Splashing of cutting fluid droplets is the norm rather than the exception。If in TSM2 Occasional false triggering readings were still found in the mode，Firstly, the direction of investigation should be whether the barrier gas pressure is within the correct range、Blowing System Air Blast Is it working properly，Instead of directly changing it back TSM1。change back TSM1 In a wet cutting environment, it does not truly solve the problem，It will only cause errors in the system due to droplet interference「The tool size is too large」Reading without being noticed by the operator。

**Engineering principle of droplet suppression**：When a drop of cutting fluid passes through a laser beam，Its optical density is much lower than that of solid cutting tools，The signal generated has a relatively small amplitude of change、Short duration。TSM2 The droplet suppression algorithm distinguishes by analyzing the amplitude change rate and duration of the signal「Droplets pass through」和「Cutting tools pass through」——The brief occurrence of droplets、Small signals are filtered，Only continuous、Significant signal changes are judged as tool triggering。

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## 4. Gas system and installation preparation

### 4.1 The quality of the gas source is a prerequisite for accuracy（Key Chapters）

NC4+ Blue The quality requirements for compressed air far exceed those for ordinary workshop pneumatic tools。In numerous on-site cases，The technical team discovered that all malfunctions were caused by quality issues with the gas source NC4 The proportion of faults exceeds half。Understanding the quality standards for gas sources is the first step in proper installation。

**Barrier gas（Barrier Air）—— BS ISO 8573-1:2010 Class 1.4.2**

This is supplied to Tx 和 Rx A protective air curtain continuously sprayed from the front end of the head，Direct contact with optical cavity。The air quality level of this air path is explained as follows：

| Classification | Grade | requirement |
|:—-|:—-|:—–|
| solid particles | 1 | Maximum particle size ≤ 0.1 μm，Maximum concentration ≤ 0.1 mg/m³ |
| 水（pressure dew point） | 4 | Dew point at maximum working pressure ≤ +3°C |
| 油 | 2 | Maximum oil content ≤ 0.1 mg/m³ |

This means**It is absolutely not feasible to directly connect the compressed air in the workshop to the barrier gas path without precision filtration and drying treatment**。Even if the workshop air source passes through a general refrigerated dryer and filter，Its oil mist content and dew point are usually still much higher than Class 1.4.2 The requirements。

**blow（Air Blast）—— BS ISO 8573-1:2010 Class 2.9.4**

This air path is used to spray high-pressure air onto the tool surface before measurement，Not in direct contact with the optical cavity，Therefore, the requirements are slightly lower：

| Classification | Grade | requirement |
|:—-|:—-|:—–|
| solid particles | 2 | Maximum particle size ≤ 1 μm，Maximum concentration ≤ 1 mg/m³ |
| 水 | 9 | No clear dew point limit（No liquid water is allowed） |
| 油 | 4 | Maximum oil content ≤ 5 mg/m³ |

### 4.2 Gas path components and connection sequence

**Recommended gas path configuration（Renishaw standards）**：

Workshop air source → precision filter/pressure regulating valve → Membrane dryer → NC4+ Blue Barrier gas inlet（Tx/Rx）

Blowing branch：Workshop air source → Independent filter/pressure regulating valve → solenoid valve → NC4+ Blue Air Blast Entrance

**Key parameters of gas path**：

| air circuit | maximum pressure | work pressure（typical） | Outer diameter of trachea |
|:—-|:——–|:————–|:——–|
| Barrier gas（Barrier Air） | 0.6 MPa (87 psi) | 0.2~0.4 MPa | hard-wired: Ø3.0 mm / quick-connect: Ø4.0 mm |
| blow（Air Blast） | 0.6 MPa (87 psi) | 0.3~0.6 MPa | Ø6.0 mm |

**Air pressure setting method**：

1. connect NCi-6 Interface unit power supply
2. Use a multimeter or NC4 Set tool monitoring and voltage settings
3. Gradually open the barrier gas pressure regulating valve
4. Observe the laser beam from Tx Clear head shooting，And set the voltage close to the peak value（usually 0.2~0.4 MPa Reached within the scope）
5. Record the current pressure value，And add on top of it **0.01~0.05 MPa** The surplus（Prevent air pressure fluctuations during machine tool operation from causing a decrease in beam quality）
6. Regarding F100/F100-10 的 IPX6 Configuration，The remaining amount needs to reach **+0.12 MPa**

**Blowing pressure setting**：
– typical value 0.3~0.6 MPa，among which **0.6 MPa Usually the most effective**
– For extremely small cutting tools（ **Important Notice**：All shielded wires（green）Should be connected to the machine tool「Star point grounding」（Star Point），A single return point for all equipment grounding and shielded cables。This is a key measure to prevent signal interference caused by ground potential difference。

### 5.3 Locking torque gauge

Torque requirements for each fastener during installation（Excessive tightening may cause the adjustment plate or NC4+ Blue Body deformation）：

### 5.4 Power interruption and recovery

NC4+ Blue The system has automatic power interruption recovery function。If NCi-6 The interface unit unexpectedly loses power during normal system operation and subsequently resumes power supply，NC4+ Blue It will automatically restart according to the power on sequence，and**Keep the gain setting parameters unchanged before power outage**，Restore working status without additional manual operation。

But pay attention to a common scenario：If during a power outage, both NC4 Mechanical operation of the body（If disassembling and cleaning the lens、Adjust installation position, etc），Then the optical path has changed，The original gain setting is no longer accurate。At this time, after restoring power and gas supply，Should be NCi-6 on SW1-2（NC set-up）Dial to On Position，Maintain agreement 5 second，Then call back Off Position——This operation will trigger the system to perform automatic gain adjustment（Auto Gain Adjustment），Re match the system with the current optical conditions and beam signal intensity。

### 5.5 First power on inspection checklist after installation

Suggest completing all installation and wiring after completion，Confirm each item according to the following list before entering the alignment stage：

**Power and wiring inspection**：
– [ ] Tx/Rx All line colors and functions correspond correctly，No cross connections or misconnections
– [ ] Tx Unused white side/blue/The purple wire ends have been insulated（Cannot be grounded）
– [ ] The shielding wire has been connected to the machine’s star point grounding
– [ ] NCi-6 The power supply voltage is 11~30 Vdc within the scope of
– [ ] Cable routing should be kept away from motor power lines and frequency converter output lines

**Air circuit inspection**：
– [ ] No bending of trachea、No damage、There is no leakage at the pipe joint
– [ ] Vertical installation of pneumatic triple components，The exhaust pipe of the membrane dryer is unobstructed
– [ ] Correct distinction between barrier trachea and blowing trachea，Not reversed
– [ ] NC4 The chips around the body will not accumulate in large quantities

**Verification after power on**：
– [ ] After connecting the power supply Tx/Rx Status LED All lights up（Blue or Violet）
– [ ] After opening the barrier gas，Tx The head laser beam is clear and visible
– [ ] Use a screwdriver or other object to pass through the beam of light，Status LED Press blue→红→Blue Change
– [ ] After closing the barrier gas PassiveSeal Activate，Beam disappearing（Verify protection function）
– [ ] After re ventilation PassiveSeal Release，Beam recovery

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## 6. Laser beam alignment（O9860）

### 6.1 The significance of alignment

The alignment accuracy between the laser beam and the machine tool axis directly determines the accuracy of all subsequent tool alignment measurements。Understanding this is crucial：**Beam alignment is not correct「Optional additional optimization steps」，But it is a prerequisite for ensuring the normal operation of the system。**

If the beam is not parallel to the main axis，When the tool is in different positions Z When the height enters the beam of light，The tool position measured by the system will produce systematic deviation with height variation。for example，If the beam is skewed 50 μm/100 mm，So in Z=0 Location and Z=-100 mm Measure the same knife at the same location，Will get a difference 50 μm Different results——This is completely unacceptable in precision machining。

### 6.2 Align tolerance standards

| Application Type | Measure span | Main axis direction P2-P1 | Radial axis direction P2-P1 |
|:——–|:——–|:—————–|:—————–|
| tool setting（Tool Setting） | 100 mm | ≤ 10 μm | ≤ 1 mm |
| Broken Tool Detection（Tool Breakage） | 100 mm | ≤ 0.2 mm | ≤ 1 mm |

**Direction explanation**：
– **Main axis**：Beam position along Z Change in axial direction——This is the most important alignment indicator
– **Radial axis**：Beam and Machine Tool X/Y Vertical deviation of the axis——Common large deviations are usually caused by the adjustment plate being installed non parallel to the machine axis

### 6.3 Mechanical alignment operation steps

**X/Y Axis alignment（horizontal direction）**：

1. loosen X/Y Shaft locking screw（×2）
2. Fine tune by hand NC4+ Blue The horizontal position of the body on the adjustment plate
3. 在 NC4+ Blue Place a dial gauge on the body，Monitoring fine-tuning quantity
4. After determining the position, be careful to lock it tightly X/Y Shaft locking screw（4.0 Nm）
5. After locking, it is necessary to verify that the position is not offset——This is the most common mistake beginners make，The body may be driven during the locking process

**Z Axis alignment（vertical direction/Beam height）**：

1. loosen Z Shaft locking screw
2. Use Z Adjust the top thread of the shaft for fine tuning
3. The torque for adjusting the top thread should not exceed 7.8 Nm
4. tighten Z Shaft locking screw

### 6.4 O9860 Beam straightening macro

After completing the mechanical coarse alignment，run O9860 Verify the beam straightening macro：

G65 P9860 B1. (Beam straightening with bias pin)

**execution flow**：
1. Clamp a calibration pin or standard core rod into the spindle
2. Macro program automatically drives the spindle to move to multiple preset positions
3. Detect the position coordinates of the tool passing through the beam at each position
4. Calculate the deflection of the beam relative to the axis of the machine tool
5. 在 CNC Display deviation values on the interface

**Deviation interpretation**：
– return value ≤ 10 μm（Main axis direction）→ qualified
– return value > 10 μm → Need to repeat mechanical fine-tuning
– The return value far exceeds（For example, hundreds μm）→ Check if the installation of the adjustment plate is roughly parallel、Tx/Rx Is the head loose

O9860 Only provide deviation indication，**Not automatically compensating**。After discovering the deviation, it must be adjusted mechanically NC4+ Blue Position and angle of the body on the adjustment plate，Then run it again O9860 Verification。

### 6.5 Specialized alignment tool

Renishaw recommends using**Ball head cylindrical calibration tool**（Ball-nosed cylinder-type calibration tool）Perform optimal alignment effect。This tool has known precise geometric dimensions，Can provide clear and repeatable signal triggering in the beam of light。

Renishaw Provided step-by-step alignment operation guidance document，Please refer to the technical support page on the official website for details。
– Wiring Configuration Guide
– Air pressure setting video guidance
– Alignment operation video guidance
– Daily Maintenance Guide
– Troubleshooting Manual

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## 7. System calibration process（O9861）

### 7.1 The physical principle of calibration

NC4+ Blue The system calibration essentially involves establishing a benchmark mapping relationship：When a standard core rod with a known diameter passes through a beam of light，Detected by the system「暗→亮」或「亮→暗」Edge position，It should correspond to the actual geometric center position and known diameter of the core rod。Through calibration，The system converts these positional information into usable tool diameter and length measurements。

Calibration simultaneously recorded temperature compensation benchmark data。Due to machine tools and NC4 The body will undergo thermal expansion and contraction with temperature changes，The calibration system needs to know at a known temperature，What is the relative position between the beam and the tool，In order to compensate for temperature changes。

### 7.2 Preparation before calibration

1. **Standardize the core rod（Calibration Bar）Clamp into the spindle**
– The core rod must be a high-precision cylinder with a known diameter（Suggest hard alloy or ceramic materials）
– The surface of the core rod must be clean、No bumps or collisions、No residual cutting fluid
– Suggest using a core rod with a diameter similar to that of daily machining tools

2. **Confirm that the mechanical alignment has been completed and passed O9860 Verification**
– run O9860 Beam straightening macro，Confirm that the deviation is within the tolerance range
– If O9860 Display out of tolerance，Mechanical fine-tuning must be completed before calibration

3. **Confirm that the machine tool is thermally stable**
– Start up and run at least 15~30 minute，Bring the spindle bearings and guide rails to a state of thermal equilibrium
– In seasons with large temperature differences（Like a winter morning），May require a longer preheating time

4. **Confirm that the gas source and power supply are normal**
– The barrier gas pressure is set correctly
– Status LED For blue
– Clear and visible beam of light

### 7.3 O9861 System calibration macro

O9861 Macro programs are the entire NC4+ Blue The core support for system accuracy。The calibration process is divided into three sub stages，After each sub stage is completed, the system automatically saves the corresponding benchmark data。

G65 P9861 B1. (System Calibration，Including temperature compensation tracking)

**Parameter Description**：

| parameter | meaning | default value | Explanation |
|:—-|:—-|:——|:—–|
| Bb. | Calibration mode selection | 1 | B1. = Standard calibration with temperature compensation tracking |

**Detailed process of sub stage standardization**：

The first sub stage —— **Diameter calibration（Diameter Calibration）**：

Core rod at set speed（for example S3000）rotate，Move from the initial safe position towards the beam direction at the standard feed rate。When the core rod first enters the beam of light，system log「亮→暗」或「暗→亮」The edge position。Then the core rod continued to pass through the beam of light，The system records the position of the edge on the other side。Subtract the known diameter of the core rod from the difference between the two edge positions，Obtain the benchmark offset of the system，Stored in macro program variables。

**Key points of the project**：
– Confirm that there are no bumps on the surface of the core rod before calibration、Oil-free、No residual cutting fluid
– The nominal diameter of the core rod must be known and traceable（Suggest using standard core rods that have been measured）
– The calibrated feed rate must be consistent with the daily measured feed rate（2.0 μm/rev Principle）

Second sub stage —— **Position/Height calibration（Position/Height Calibration）**：

After completing the diameter calibration，System automatic execution Z Position calibration of direction。The position of the core rod tip in the beam is recorded as the reference zero point for measuring the blade length。

Third sub stage —— **Temperature compensation benchmark record（Temperature Compensation Baseline）**：

The system reads the current temperature sensor value of the machine tool，Record as compensation baseline。In the subsequent daily measurement cycle（如 O9862）中，The system will read the current temperature in real-time and compare it with the baseline，Automatically calculate and compensate for beam position drift caused by thermal expansion and contraction。

**The engineering significance of temperature compensation**：A machining center from cold start in the morning to hot balance in the afternoon，The relative position between the spindle and the worktable may change 10~30 μm（Depending on the size of the machine tool and temperature rise）。If there is no temperature compensation，This thermal drift can cause inconsistent measurement results for the same knife in the morning and afternoon。O9861 The temperature compensation baseline established is to solve this problem。

### 7.4 Verification after calibration

After calibration is completed，Run the same core rod once to confirm the measurement（Use O9862 Perform knife length+Diameter measurement），Verification：

If the deviation exceeds the above range，Perform systematic troubleshooting：
1. Is the core rod clean——Wipe the surface of the core rod with non-woven fabric dipped in anhydrous ethanol and retest
2. Is the core rod bumped——High magnification visual inspection of the cylindrical surface of the core rod
3. Is the mechanical alignment drifting——Run again O9860 check
4. Is the barrier gas pressure correct——Check the pressure gauge reading
5. Is the optical lens contaminated——visual inspection Tx/Rx MicroHole region

### 7.5 Dynamic strategy for calibrating frequency

It is not recommended to use fixed calibration intervals。The following dynamic strategies are more in line with actual production needs：

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## 8. Macro Programming Reference

### 8.1 O9860~O9868 Macro Program Summary Table

Non contact knife alignment（NCTS）Using independent O9860~O9868 Macro series，Contact type knife alignment O9850~O9854 The macro series is completely different。The following is an overview of the functions of each macro：

| Macro Number | Functional Classification | Detailed functions | Typical call |
|:—-|:——–|:——–|:——–|
| O9860 | Installation/Maintain | Laser beam straightening and alignment verification | G65 P9860 B1. |
| O9861 | Calibration | System Calibration + Temperature compensation tracking | G65 P9861 B1. |
| O9862 | measurement | Tool length and/Or diameter setting | G65 P9862 A3. B1. H0.01 S5000 Y10. |
| O9863 | Broken Tool Detection | Insertion cutting tools（End mill cutter）Broken Tool Detection | G65 P9863 A1. Q5. S5000 |
| O9865 | measurement | Tool radius and linear contour detection | G65 P9865 A1. … |
| O9866 | Broken Tool Detection | Physical cutting tools（drill/tap）Broken Tool Detection | G65 P9866 A1. … |
| O9867 | measurement | Arc radius measurement（Ball head knife/Radius cutter） | G65 P9867 A1. … |
| O9868 | measurement | Measurement of eccentric cutting tools | G65 P9868 A1. … |

### 8.2 Detailed explanation of commonly used macro parameters

The following parameters apply to all O986x Series Macro（Some parameters are not applicable in specific macros）：

| parameter | variable type | meaning | Typical value range |
|:—-|:——–|:—-|:———-|
| Aa. | Integer selection | Measurement mode selection（1=Blade Length, 2=diameter, 3=Blade Length+Diameter, etc） | 1~8 |
| Bb. | Integer selection | Calibration/Selection of School Direct Mode | 1 |
| Hh. | Real number tolerance | Tool detection tolerance（mm）：Exceeding this value triggers an alarm or flag | 0.005~0.500 |
| Jj. | Real distance | Travel increment（mm）：Extra search distance beyond expected location | 1.0~5.0 |
| Mm. | Real number tolerance | Position tolerance（mm）：Allowable deviation of tool from expected position | 0.01~1.0 |
| Qq. | Real distance | Security increment（mm）：Safety approach distance before measurement | 2.0~10.0 |
| Ss. | Integer rotational speed | spindle speed（rpm）：Laser alignment requires rotating the tool | 1000~15000 |
| Tt. | Real distance | backoff （mm）：Measure the distance of spindle retreat after completion | 1.0~5.0 |
| Ww. | Switch selection | Travel assessment and selection | 0/1 |
| Yy. | Real number feed | Measure feed rate（mm/min）：The speed of the tool passing through the beam of light | 按 2.0 μm/rev Calculation |

### 8.3 Feed rate calculation and correction

**core principle**：Laser knife alignment is a dynamic measurement，Feed rate directly affects measurement accuracy。

The recommended standard feed rate by Renishaw is **2.0 μm/rev**（Feed rate per revolution）。Actual feed rate calculated based on spindle speed：

Y (mm/min) = 2.0 (μm/rev) × S (rpm) / 1000

**Common feed rate lookup table**：

| spindle speed (rpm) | Recommended feed rate (mm/min) |
|:————–|:——————|
| 1000 | 2.0 |
| 2000 | 4.0 |
| 3000 | 6.0 |
| 5000 | 10.0 |
| 8000 | 16.0 |
| 10000 | 20.0 |
| 15000 | 30.0 |

**Important**：If the feed rate during calibration is inconsistent with the feed rate during daily measurement，Will generate systematic measurement bias。Be sure to maintain consistent feed rates for calibration and measurement。

### 8.4 Complete programming example

**Example 1：Standard knife alignment process（Blade Length+Simultaneous measurement of diameter）**

O1000 (Main program startup)
T02 M06 (Replace the 2nd knife)
G90 G00 X150. Y100. Z100. (Locate to a safe location)
S5000 M03 (Spindle forward rotation 5000 rpm)
M65 (Activate NC4 air curtain protection/blow)
G65 P9862 A3. B1. H0.02 J2.0 Q5.0 S5000 T3.0 Y10.0
(A3. = Blade Length+Simultaneous measurement of diameter)
(B1. = Standard Mode)
(H0.02 = tolerance ±0.02 mm)
(J2.0 = Passing the itinerary 2.0 mm)
(Q5.0 = Safety distance 5.0 mm)
(S5000 = spindle speed 5000 rpm)
(T3.0 = Retract after measurement 3.0 mm)
(Y10.0 = feed rate 10 mm/min)
M66 (Close the NC4 air curtain/blow)
G90 G00 Z100. (Return to a safe location)
M30

### 8.5 Common macro programming errors and prevention measures

The following are macro programming errors that repeatedly occur during on-site debugging，Worth special attention：

**Error 1：Forgetting to activate the air curtain protection before laser alignment**

(Error example)
T01 M06
G90 G00 X100. Y100. Z50.
S5000 M03
G65 P9862 A3. B1. H0.02 S5000 Y10.0
(Air curtain protection not activated——Measurement may be affected by cutting fluid interference)

(Correct example)
T01 M06
G90 G00 X100. Y100. Z50.
S5000 M03
M65 (Open NC4 air curtain/blow——Must be executed before the measurement cycle)
G65 P9862 A3. B1. H0.02 S5000 Y10.0

**Error 2：The measured feed rate is inconsistent with the calibrated feed rate**

This is the most covert and common source of systematic bias。If used during calibration Y10.0（correspond to S5000），But in daily measurements, in order to meet the deadline, it was changed to Y20.0，Each measurement will result in a deviation in a fixed direction。The reason is that the response time of the laser signal processing circuit has been calibrated at a constant feed rate，After changing the feed rate，The timing of signal edge interpretation is different from the calibration timing。

Preventive rules：
– Calibrate feed rate = Measure feed rate（Strictly equal）
– Every time the feed rate is modified, it must be recalibrated
– Recommended value：2.0 μm/rev

**Error 3：Use O9862 Forgetting to set tool rotation（S Instruction）**

Laser knife alignment is a dynamic measurement，The tool must rotate。If you forget to send it out S Instruction（Or the spindle has not reached the set speed），The measurement results will be unreliable。The laser tool setter detects the contour of the envelope surface of the rotating tool，Instead of the unilateral position of the stationary tool。When there is no rotation，The cutting tool only has one side facing the laser beam，Unable to obtain complete diameter information。

**Error 4：Measure directly after changing the knife，Not located in a safe location first**

After changing the tool, the spindle may be located at any position，Directly calling the tool macro may cause the tool to collide directly NC4 ontology。Must be executed first G00 Locate to safe coordinates（Ensure that the tool is above the beam and away from it Tx/Rx 头），Call the measurement macro again。This is the first step towards programming security，Cannot be omitted。

**Error 5：H Overly strict tolerance parameter settings result in frequent false alarms**

H The parameter defines the tool tolerance judgment value。If set to H0.005（±5 μm），And the repeatability of tool changing in the machine tool itself lies in 5~10 μm magnitude，Then every time the tool is changed, an alarm will be triggered for tool alignment（Even if the tool itself is fine）。H The value should be set according to the actual processing requirements，Usually recommended H0.01~H0.02（±10~20 μm）As a starting value，Adjust according to the actual process capability。

**Example 2：Broken Tool Detection（Insert milling cutter）**

O2000
T02 M06
S5000 M03
M65
G65 P9863 A1. Q5.0 S5000 Y10.0 (Renishaw standard knife breakage detection macro，If a broken blade is detected, it will directly trigger a system alarm and shut down within the macro，No need for external variable judgment)
M66
M30

**Example 3：First calibration after installation**：

O3000
G90 G00 X150. Y100. Z100.
S3000 M03
M65
G65 P9860 B1. (Run beam straightening verification)
(If O9860 returns a deviation exceeding the tolerance，Need to re align mechanically)
G65 P9861 B1. (Perform system calibration)
M66
G90 G00 Z100.
M30

—

## 9. Daily maintenance and upkeep

### 9.1 Maintenance Plan Summary Table

NC4+ Blue Designed as a permanent fixture for machine tools，Low maintenance requirements under normal working conditions，But a systematic maintenance plan is still the foundation for ensuring long-term stable accuracy：

### 9.2 Detailed operation of optical lens cleaning

**⚠️ Warning**：
– Before cleaning the optical lens, it must be cut off NCi-6 Interface unit power supply
– Adjust the barrier pressure to 0 MPa
– The dustproof panel can only be disassembled by trained personnel using specialized tools during maintenance
– disassemble Tx The power must be disconnected in front of the head panel，To avoid exposure to laser radiation
– Internal optical cavity PassiveSeal After exposure，The interior of the panel is Class 3R Laser radiation area

**Required tools and materials**：

**Step by step cleaning operation**：

1. **Power off**：disconnect NCi-6 Interface unit power supply（Can be obtained from NCi-6 或 NC4+ Blue Disconnect at the connector）
2. **Cut off the gas source**：Rotate the barrier gas pressure regulating valve to 0 MPa
3. **Check the trachea**：If there is damage to the trachea，Replace in this step
4. **Remove the dust cover panel**：Use a needle wrench to rotate counterclockwise and unscrew Tx 或 Rx Dust proof panel for the head
5. **Check and remove debris**：Visually inspect the large particle debris in the panel installation area，Blow off with a dust removal cylinder。Be careful not to let debris fall into the interior of the casing
6. **push open PassiveSeal**：Insert the cleaning tool into the casing and rotate it 70~80 度，使 PassiveSeal Detach from the surface of optical glass
7. **blow cleaning**：Short term ventilation about 1 minute，Using airflow to remove loose pollutants
8. **Spray cleaning solvent**：Spray precision cleaning solvent onto the lens through the center hole of the cleaning tool
9. **Wipe the lens**：Use a cleaning cotton swab to rotate at a quarter turn（quarter-turn）Gently wipe the surface of the lens with a gentle motion
10. **Attention**：Do not press the lens hard or PassiveSeal，The optical surface is extremely precise
11. **Blow off solvent residue**：Spray the inside of the shell with a dust removal gas cylinder，Remove all solvent traces
12. **Clean the dust-proof panel**：Clean the panel with cleaning solvent and dry compressed air MicroHole
13. **Reinstall the panel**：Remove cleaning tools，Reinstall the dust panel，Tighten with a needle wrench until **2.0 Nm**
14. **Repeat on the other side**：For another head（Tx 或 Rx）Perform the same cleaning

**Restoration inspection after cleaning**：

1. Reconnect and connect again NCi-6 Interface unit power supply
2. Restore barrier gas supply and set correct air pressure
3. 将 NCi-6 on SW1-2（NC set-up）Dial to On，Waiting for Appointment 5 Call back in seconds Off——This triggers automatic gain adjustment
4. Pass an object through a beam of light，Verification Status LED 按「蓝→红→蓝」Normal changes

### 9.3 Membrane dryer replacement

The life indicator of membrane dryer is dew point indicator（Dew Point Indicator）the color：

**Replacement steps**Please refer to page 4.3 节，key points：
– The dryer is installed on the pneumatic triple component
– Replace with Renishaw exclusive service package
– After replacement, the barrier gas pressure needs to be reset

### 9.4 Replacement of blowing nozzle

When the blowing nozzle is damaged due to collision or long-term use，need to replace：

1. cut off NCi-6 Interface unit power supply
2. Lower both the barrier gas and blowing pressure regulating valves to 0 MPa
3. Use nozzle wrench（Nozzle Key，Attached to the replacement package）Unscrew the old nozzle counterclockwise
4. Install a new nozzle assembly（Including gasket），Tighten to **2.0 Nm**
5. Restore power and gas supply
6. Set the blowing pressure（typical value 0.3~0.6 MPa）

If the nozzle is damaged and continues to be used，The blowing airflow direction is incorrect，May cause the cutting fluid on the tool to be unable to effectively blow away，Affects measurement accuracy。

—

## 10. Common troubleshooting and diagnosis

### 10.1 Complete troubleshooting table

Engineers should read the table in the following order during on-site inspections：Confirm the fault phenomenon first → Search for possible causes（Sort in descending order of probability）→ Execute the corresponding operation。If the operation is invalid，Go down the table to investigate the next cause。

| Fault phenomenon | Possible reasons（Sort by probability） | Investigation and solution measures |
|:——–|:——————–|:————-|
| **Tx/Rx LED None of them light up** | ① wrong connection | Compare with the 5.2 Check the correspondence between wire color and function one by one in the wiring table |
| | ② NCi-6 Power supply abnormality | measurement NCi-6 Power input terminal voltage，should be 11~30 Vdc within the scope of |
| | ③ Fuse blown | Check for short circuits between terminals after power failure，After exclusion, power on again（Resettable fuse automatically restores） |
| | ④ Cable damage | check 12.5 m Is there any damage to the outer sheath of the cable、Internal disconnection |
| **There is power supply but no laser emission** | ① Barrier gas not connected（PassiveSeal Activate） | Check if the main valve of the gas source and the pressure regulating valve of the pneumatic triple component are open |
| | ② Insufficient barrier gas pressure | Gradually increase the pressure and observe when the laser beam is clearly emitted |
| | ③ Tracheal bend or damage | Check the bending points and damaged areas section by section along the gas pipeline diameter |
| | ④ Dust proof panel MicroHole block | Remove the panel for cleaning after power failure MicroHole |
| **Poor repeatability accuracy/Abnormal reading** | ① There is cutting fluid on the tool/Chip cutting | Extend the blowing time or increase the blowing pressure；High speed rotation to shake off cutting fluid |
| | ② Feed rate too high | Check if the feed rate is measured according to 2.0 μm/rev setting |
| | ③ electromagnetic interference | check NC4 Is the cable routing away from power lines and servo drives |
| | ④ The machine tool is not thermally stable | preheat 15~30 Measure again in minutes |
| | ⑤ Incorrect barrier gas pressure | According to the 4.2 Reset the section |
| | ⑥ Calibration failure/offset | Re-execute O9861 Calibration |
| | ⑦ Inconsistent measurement and calibration of feed rate | Ensure that the calibration and daily use feed rates are the same |
| | ⑧ Poor mechanical repeatability of machine tools | Perform machine tool health check（Rail clearance、Screw backlash） |
| | ⑨ mounting bracket/Loose adjustment plate | Check and re tighten to the specified torque |
| **Voltage exceeds the set mode 1.0~7.0 V** | ① Poor power regulation | Confirm NCi-6 Stable power supply voltage |
| | ② Optical lens contamination | Execute the 9.2 Clean up process |
| | ③ Incorrect barrier gas pressure | Reset the air pressure |
| | ④ Tx/Rx Head to head offset | Execute the 10.4 节 Tx/Rx Realign |
| | ⑤ Improper connection of multimeter | Check the multimeter probes and CN1-1/CN1-2 The Connection |
| **LED Presented in violet color（Setup Mode Off）** | ① System voltage drop（Lens contamination/Low air pressure/alignment shift ） | Clean the lenses → Check the air pressure → Check alignment → Exclude all three one by one |
| | ② MicroHole Or dirty lenses | Execute the cleaning process |
| | ③ Installing an incorrect model of dust panel | Confirm the panel model and NC4 Model matching（Refer to the attached data table H-2000-2223） |
| **LED Blinking Blue/violet（1 Hz）** | ① System voltage is too high | Re-execute Tx/Rx align |
| | ② Tool Set 2 / Latch The tool rotates in the beam of light in the mode | It is a normal phenomenon——Gap between tool teeth allows laser to pass through，The system has not been triggered |
| **LED The red light is always on** | ① No gas supply | Check the air circuit |
| | ② Tracheal damage | Check if the trachea is damaged or bent |
| | ③ Tx/Rx Severe head to head displacement | Execute Tx/Rx Realign |
| | ④ The laser beam is blocked by foreign objects | Remove obstacles |
| | ⑤ Serious lens contamination or MicroHole block | Execute the cleaning process |
| | ⑥ wrong connection | Check all cable connections against the wiring table |
| | ⑦ The gas source does not meet the standard（Class 1.4.2） | Confirm the quality of the gas source，If necessary, install Renishaw special triple parts |
| | ⑧ Used non Renishaw air filters | Confirm that the filter meets the requirements Class 1.4.2 standard |
| | ⑨ Automatic drain valve damaged | Replace the filter/dryer/Pressure regulating valve assembly |
| | ⑩ The trachea is filled with cutting fluid or oil | Blow off or replace the trachea |
| **NC4 The setup tool cannot boot up** | ① Contact spring contacts are dirty/damage | Clean the spring contacts at the bottom of the setting tool |
| | ② NC4+ Blue Top scale accumulation | clean NC4 The top shell ensures electrical contact |
| | ③ Battery reversed or depleted | Check battery polarity，Replace with new batteries |
| | ④ Using non-standard batteries | Only usable：Saft LS 14250 / Tadiran SL-750 / Xeno XL-050F |
| **Setting tool reading abnormal** | ① Low battery level | Replace with new batteries |
| | ② Not in setup mode | NCi-6 SW1-2 Must be On Position |

### 10.2 Multi meter diagnostic method

Using a digital multimeter for judgment NC4+ Blue Accurate Method for System Health Status：

**connection method**：
1. Set the multimeter to DC voltage mode（DCV，20V range）
2. Connect the red probe to NCi-6 的 CN1-1（analog output 1）
3. Connect the black probe to NCi-6 的 CN1-2（analog output 2）
4. 将 NCi-6 的 SW1-2（NC set-up）Switch to On

**Normal reading diagnosis**：

**Normal Mode SW1-2=Off**：
| Reading range | Status description |
|:———|:——–|
| 4.7 V ~ 5.4 V | normal——The system is operating at its optimal state |
| > 5.4 V | Voltage too high，Need maintenance |
| ±5°C | Generate measurable systematic deviations | Precision machining can only continue after recalibration |

**best practices**：
– Wait after turning on the device 15~30 minute，Perform precise tool alignment after the machine tool reaches thermal stability
– Seasonal change season（spring and autumn seasons）The calibration cycle should be shortened to half of the regular one
– Use O9861 Temperature compensation tracking function——After calibration, the system automatically records the temperature reference and implements compensation

### 11.3 Installation location and cable routing

**Mechanical installation aspect**：
– NC4+ Blue It should not be installed in the position where chips directly impact
– Adequate space should be left around the body for daily inspection and cleaning
– Gas pipes and cables must be fixed with pipe clamps，Prevent machine tool movement from affecting NC4 Apply tensile force to the body
– The bending radius of the trachea shall not be less than the specified minimum bending value（air pipe ≥ 25~30 mm）

**Electrical wiring aspect**：
– NC4 Shielded cables must never be used with power cables（Motor power line、Inverter output line）Parallel wiring
– Must maintain at least 100 mm The above spacing
– All shielded wires（green）Must be connected to the machine tool「Star point grounding」
– NCi-6 The interface unit is installed inside the control cabinet and kept away from transformers and servo drives

### 11.4 Feed rate consistency

**This is the most common systematic mistake that beginners are prone to make**：Calibration O9861 Use 10 mm/min The feed rate，But daily measurements O9862 But using 20 mm/min The feed rate。When the two are inconsistent，Will generate systematic deviations in a fixed direction，And the deviation will increase with the difference in feed rate。

**Rules**：
– Calibrate feed rate = Daily measurement of feed rate（Strictly equal）
– Recommended by 2.0 μm/rev Calculation
– After each modification of the measurement feed rate，Must be recalibrated

### 11.5 Preparation work before tool measurement

Laser knife alignment is**Dynamic Measurement**，This means that compared to contact type knife alignment，It has several unique requirements：

1. **The tool must rotate**（S The instruction is valid）：NC4+ Blue Measurement is required while the tool is rotating。This is because the cutting edge of the tool repeatedly passes through the beam of light during rotation，The system detects the contour of the tool rotation envelope surface。The detection of broken knives also relies on this principle——A rotating complete tool generates a stable signal pattern，A broken tool produces abnormal patterns。

2. **The surface of the cutting tool must be clean**：When cutting fluid or chips adhere to the surface of the tool，Additional scattering or obstruction may occur when the laser passes through，Resulting in measurement results being larger than the actual tool size。Suggested methods：
– Use Air Blast The blowing system sprays the tool before measurement
– For stubborn attachments，Can use high-speed rotation（8000~10000 rpm）Release cutting fluid

3. **Special treatment of small cutting tools**：For diameters smaller than Ø0.5 mm Micro cutting tools，The blowing pressure should be appropriately reduced（从 0.6 MPa drop to 0.3~0.4 MPa），Prevent high-speed airflow from bending and deforming slender cutting tools，Causing measurement errors。

—

## 12. Conclusion and Reference Documents

### 12.1 Core Points Review

NC4+ Blue Installation of non-contact laser tool setter、Calibration and maintenance can be summarized into three key dimensions：

**Installation dimension**——Correct installation is the cornerstone of accuracy：
– The quality of the gas source must reach BS ISO 8573-1 Class 1.4.2（Pneumatic triple components with membrane dryer and precision filter are essential，Not optional）
– Verticality of adjustment plate installation ≤ 1.0 mm/Total length of the board
– Shielded cable routing away from interference sources，All shielding layer single ended star point grounding

**Calibration dimension**——Continuous calibration is the guarantee of accuracy：
– Beam straightening O9860：Main axis direction ≤ 10 μm/100 mm
– System Calibration O9861：Establish benchmarks using standard core rods，Including temperature compensation tracking
– The calibration frequency is dynamically adjusted according to the requirements of machining accuracy and changes in environmental temperature

**Maintenance Dimension**——Regular maintenance is a prerequisite for stability：
– The quality of the gas source directly determines the lifespan of the optical lens
– Status LED Color is the most intuitive diagnostic tool
– Special tools and procedures are required for cleaning optical lenses

as CNC Key equipment for high-precision tool alignment in machining centers，NC4+ Blue The potential of can only be fully realized under the premise of correct installation and systematic maintenance。I hope this guide can provide on-site engineers with practical reference for the entire process from installation to maintenance。

### 12.2 Reference Documentation

*The technical data in this article are all quoted from the official Renishaw technical manual mentioned above，If you have any questions, please refer to the original manual。*

—

> **Document Version**: V1.0
> **Applicable Products**: Renishaw NC4+ Blue Non contact laser tool setter
> **Compatible Systems**: FANUC / MITSUBISHI MELDAS And compatibility CNC system
>
> *The references cited in this document Renishaw And the related product names are Renishaw plc Registered trademark of the company。All macro program parameters are official from Renishaw NCTS The programming manual shall prevail。*

—

**Related Reading**-Is the signal of the Blum Blum laser tool setter unstable? Diagnosis and Solutions（ https://jcetech.cn/blum-laser-signal-instability/ ）Troubleshooting of laser tool setter signal faults-[Renishaw probe and tool setter selection guide]（ https://jcetech.cn/renishaw-probe-selection-guide/ ）Renishaw’s full range selection reference-[Renishaw Inspection Plus Macro Programming Guide]（ https://jcetech.cn/renishaw-inspection-plus-fanuc/ ）- Fanuc System Inspection Plus Programming Explanation

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