What is the Renishaw Equator comparator? Explain the principles, composition, and applicable scenarios in one go

Small and medium-sized machined parts, automotive components

Model	Positioning	Working volume	Typical applications
Equator 300	Standard	XY Ø 300mm × Z 150mm (raised version: working volume 205mm from base)
Equator 500	Large	XY Ø 500mm × Z 250mm (SM25-3 extended Z 400mm)	Large parts, gearbox housings, aviation structural components
Equator-X 500	Dual mode	XY Ø 500mm × Z 250mm	High demand scenarios for both absolute and comparative measurements

The Equator-X 500 is a dual-mode model launched in recent years: it can detect large quantities of parts at high speed in comparison mode (with a repeatability of ± 2 μ m and a scanning speed of 500 mm/s), or switch to absolute measurement mode (ISO 10360-2 accuracy of 2.1 μ m+L/300, temperature range evaluation of 18-22 ° C, scanning speed of 250 mm/s) for direct measurement, without the need for standard parts, suitable for scenarios with high part variability and low to medium production.

2、 Detailed explanation of system composition: What components make up an Equator system

A complete Equator system, as described in Renishaw’s official Equator User Guide, includes the following components as standard: Equator comparator host, controller unit, flat panel display (1280 × 1024 resolution, DVI or VGA interface), keyboard, mouse, probe system (SP25/SP25M), EQR-6 six position automatic needle changing rack, calibration parts and measuring needles, emergency stop button or joystick, one or more fixture boards (according to order quantity), and Organiser operating software. Below, we will explain the roles of each component one by one.

2.1 Equator Host: “Measurement Body” of Hexapod Parallel Mechanism

The Equator host is the core actuator of the system, with a compact appearance (taking the 300 model as an example, the external dimensions are about 570mm × 500mm × 700mm, and the machine weight is only 25kg). The whole machine consists of a base casting, a top casting, a floating platform, six drive support rods, a counterweight mechanism, a Hooke hinge, and a parallel restraint mechanism.

Unlike the traditional series structure of “X-axis stacked on Y-axis, Y-axis stacked on Z-axis” in coordinate measuring machines, Equator adopts a hexapod parallel mechanism: six linear motors drive the support rods to jointly support and drive the movement of the probe platform. This structure has several significant advantages:

Error non accumulation: The error of each axis in the series mechanism will be superimposed on the next axis, while the support rods of the parallel mechanism independently bear the driving force, without the error amplification effect of stacking axis by axis.;

Good rigidity and agile movement: The driving force only acts in the stretching/compression direction of the support rod, without bending or twisting. The structure has high rigidity and can achieve high-speed scanning (maximum moving speed of 500 mm/s for the 300 type);

Separation of measurement framework and driving framework: The carbon fiber measurement framework carries the probe and grating ruler, and is thermally and force isolated from the driving structure. This is the structural basis for maintaining accuracy of the entire machine under temperature fluctuations in the workshop..

It should be noted that the working mode of the Equator host is different from that of CMM: the CMM’s probe moves along three mutually perpendicular guide rails X/Y/Z, while the Equator’s platform moves freely in a cylindrical workspace, with a working volume of a cylinder (such as Ø 300mm × 150mm for the 300 model and 205mm for the raised version). The position of the working volume in the Z direction is related to the length of the measuring needle: for example, when using a measuring needle with a size of 75 × 8, the lower boundary of the working volume is tightly attached to the fixture plate; When using shorter measuring needles, there will be a “gap” below the working volume, which is specifically used to accommodate the part fixture – that is to say, a reasonable fixture design will not occupy any measurement space. Short measuring needles combined with fixture plate spacers can further optimize space utilization. In addition, Equator adopts electric drive, which does not require compressed air. The whole machine can work by connecting to a single-phase power supply, which is also an important reason why it is suitable for workshop environments. The overall protection level of the machine is IPX0 (for indoor use), and the base is IPx2. In terms of sports safety, the system will automatically stop when attempting to move beyond the working volume range in manual or joystick mode; In program running mode, movement requests that exceed the range will directly report an error message, avoiding collision risks from a mechanistic perspective.

2.2 Controller: The “Brain” and Power Supply Unit of the System

The controller unit is responsible for supplying power to the Equator host and running front-end software. The interface configuration of the controller includes: USB interface on the front panel and standby button; USB interface, monitor interface (DVI/VGA), Ethernet interface, main power interface, and power switch on the rear panel. The controller can be placed upright or horizontally, but attention should be paid to heat dissipation – there are cooling fans in front and behind the controller, and the distance between the fan inlet and outlet should be at least 10cm from any surface to avoid blockage.

The entire system is fully assembled upon delivery and can be put into use by simply connecting external devices such as power supply, monitor, keyboard, and mouse. For the Programmable Equator, the system also comes with a Joystick and MODUS Equator software, as well as a USB dongle.

2.3 SP25/SP25M three-axis analog scanning probe: the core of measurement capability

The standard probe for Equator is the Renishaw SP25/SP25M three-axis analog scanning probe. Unlike trigger probes that can only output “trigger signals”, SP25 is an analog scanning probe. The probe has a small displacement stroke in the XYZ directions and can continuously output position signals while moving. Therefore, it can continuously collect hundreds or thousands of measurement points along the contour of the part in a scanning manner.

The direct benefit of scanning the probe is that it can cover the entire contour or key features in one scan, and the density of measurement points far exceeds the “point by point measurement” of trigger based measurement. The amount of detection information is greatly increased, and the speed is faster. Combined with different scanning modules, the probe configuration of SP25 is very flexible:

SM25-2 scanning module (standard configuration): supports straight rod measuring needle 50~105mm and curved rod measuring needle up to 83mm, suitable for contour scanning of the vast majority of conventional parts;

SM25-3 Scanning Module(Extended Configuration): Supports measuring needles up to 200mm in length, used for measuring deep hole and cavity features. When equipped with SM25-3, the Equator 500 can extend the Z-axis working volume from 250mm to 400mm..

2.4 EQR-6 Six Position Automatic Needle Changing Rack: No need for manual needle changing

EQR-6 is a standard six position automatic needle changing rack for Equator, which can store up to 6 different specifications of measuring needles at the same time. When the measurement program needs to switch to a different measuring needle (such as changing from a straight rod measuring needle to a star shaped measuring needle, or to a curved rod measuring needle), the system will automatically complete the needle change action, without the need for the operator to manually twist the needle or recalibrate it.

This ability is particularly important for complex parts: a part often has multiple features such as outer contour, inner hole, deep groove, inclined surface, etc., and the most suitable measuring needle for each feature is different. With EQR-6, a program can automatically combine multiple measuring needles to complete all feature measurements, saving time for manual needle changes and avoiding the risk of misoperation caused by manual needle changes. In practical applications, aviation customers such as Meyer Tool use at least four different measuring needles (including star shaped measuring needles) to automatically switch and complete the detection of complex parts. After changing needles, there is no need to recalibrate, which greatly facilitates multi angle measurement.

2.5 Organizer software and display, keyboard and mouse: interface for workshop operators

The operation software of the Equator system is divided into two layers: theOrganisrinterface for workshop operators, and theMODUS Equatorprogramming software (programmable version) for programmers. Organizer is the main interface that operators face every day, responsible for running and managing inspection programs for specific parts – the operator selects the program corresponding to the current part from the program list, starts it with one click, and the screen displays the measurement results and Pass/Tail judgment in real time, without any programming background.

The standard configuration of the monitor is a flat panel display with a resolution of 1280 × 1024 (DVI or VGA interface), which can be used in conjunction with a keyboard and mouse to complete daily operations. The goal of the entire interface design is to enable ordinary operators in the workshop to quickly get started, which is also one of the reasons why Equator is known as a “workshop friendly” device.

2.6 Calibration Parts, Measuring Needles, and Fixture Plates: Ensuring the Infrastructure for Available Measurements

A set of Equator system comes with a Calibration Artefact and a probe at the factory for calibrating the probe. After replacing the probe or scanning module, the probe needs to be recalibrated with the calibration Artefact to ensure the accuracy of the measurement data.

Fixture Plateis a carrier for fixing parts. The Equator base adopts a standard fixture board design, with optional M8, M6 or 1/4-20 threaded hole specifications. The part positioning seat (Nest) can be quickly installed and replaced. When multiple parts are tested together, multiple fixture boards can be prepared, with corresponding positioning seats pre installed on each board. During production replacement, the entire board can be replaced within a few minutes. The design of the fixture board also takes into account the short probe scenario – the space below the working volume can accommodate the fixture without occupying measurement space, and if necessary, fixture board pads can be added.

2.7 Emergency Stop Button: Safety Protection

The system comes standard with a Stop Button or joystick for immediate shutdown in emergency situations. Precautions for use include: When connecting the emergency stop button or joystick, the main power must be disconnected; Machine moving parts (drive support rods, platforms, etc.) are painted with prominent orange warning colors; It is recommended to maintain a clearance of 1 meter around the machine during operation to prevent collisions. These safety design instructions indicate that Equator is a device designed for the workshop site and operated directly by operators, and safety configuration is an integral part of system integrity.

2.8 System Composition Summary

By stringing together the above components, an Equator system can be understood as follows:The Equator host is responsible for “motion” (driving the probe of the hexapod parallel mechanism), the controller is responsible for “calculation” (power supply+running software), the SP25 probe is responsible for “sensing” (three-axis analog scanning), the EQR-6 is responsible for “replacement” (automatic needle replacement), the calibration part is responsible for “calibration” (calibrating the probe), the fixture board is responsible for “installation” (fixing the parts), and the Organizer is responsible for “tube” (running the program and displaying the results). Each component has clear division of labor and together forms a complete online testing unit for the workshop.

2.9 Programmable Versions and Extension Options: Boundaries of System Capability

Renishaw divides Equator into two delivery forms:Operator versionandProgrammable version. The Operator version includes all the standard components mentioned above, suitable for the usage mode where the program is pre written by the service provider or testing engineer and the operator only runs it; The Programmable version includes a Joystick, MODUS Equator programming software, and USB dongle in addition to standard components, allowing users to create and modify measurement programs in the workshop.

The scalability of the system is mainly reflected in the integration of software and peripherals:

MODUS Equator Software Suite(including MODUS IM series components corresponding to Equator-X platform): Provides drag and drop programming (no code required), DMIS code programming (handling complex geometry), virtual environment modeling, graphical reporting (supporting QIF XML and CAD data), feature data trend analysis and other functions, linking “programming measurement reporting analysis” into a complete chain;

IPC intelligent process control(optional): realizes automatic feedback of measurement results to CNC machine tools, supports one Equator to monitor one to many updates of multiple machine tools, and is a key component in building unmanned closed-loop units;

Automation Integration(Optional): Supports integration with automation units such as robot loading and unloading, automatic doors, etc., to achieve unmanned quality inspection;

Needle Expansion: In addition to factory standard measuring needles, users can purchase various specifications of measuring needles according to the characteristics of the parts (Renishaw provides a complete product line of measuring needles). The EQR-6 needle changing rack supports flexible combination of 6 measuring needle positions.

It should be noted that third-party integration solutions at the software level (such as integration with third-party software platforms such as PC-DMIS and CALYPSO) belong to third-party compatibility solutions. Specific compatibility and configuration methods are recommended to be confirmed with the service provider during the selection phase.

3、 Working principle: Standard part comparison+Re mastering How to ensure accuracy

3.1 Core Logic: First use standard parts to “reset”, then test production parts

The measurement process of Equator can be summarized into four steps:

Calibration standard part: Take a processed and stable part as the master part, measure its actual size using CMM or other means, and generate benchmark data;

Equator Mastering: Install the standard part onto the fixture board, let the Equator measure it, and the system records the measurement values of each feature of the standard part, which is equivalent to “zeroing” the entire measurement space;

Batch comparison: Replace the production parts and measure them one by one. The system output is not absolute coordinates, but the deviation value of the production parts relative to the standard parts.After comparing with the tolerance zone, Pass/Tail judgment is given.;

Re mastering: When environmental conditions such as workshop temperature change, re measure the standard parts and reset the system to zero to eliminate the influence of temperature drift..

The cleverness of this process lies in the fact that standard parts absorb systematic errors, while the measurement results of production parts only focus on “relative differences”. As long as the system remains stable between two calibrations, the drift caused by environmental temperature changes will be automatically offset by the “comparison” logic.

3.2 Re mastering: One click zeroing of temperature drift

The temperature in the workshop cannot be constant, and temperature is the number one enemy of precision measurement. Equator’s approach to solving temperature problems is not “confrontation” but “adaptation”:

Heat insensitive structure: The thermal expansion coefficient of the carbon fiber metering frame is extremely low, and with the help of a thermal expansion compensation model, the temperature effect is minimized structurally.;

Re mastering mechanism: When the temperature changes, re measuring the standard part can reset the system to zero.. The key number is –recalibration takes as much time as measuring a production part, which means that calibration takes almost no extra time.. In workshops with significant temperature differences, companies can perform Re mastering every 2-3 hours, and Meyer Tool and other customers operate according to a 3-hour cycle with stable results;

Full temperature range specification: The Equator’s repeatability accuracy of ± 2 μ m (2 σ) is given over the entire operating temperature range of+5 ° C~+50 ° C (Equator 300 is+10 ° C~+40 ° C), and is effective at any temperature change rate, rather than being achieved “under constant temperature conditions of 20 ° C ± 1 ° C.” This is the essential difference between its specification description and traditional CMM.

3.3 Three comparison methods: the accuracy can be traced back to where the standard parts come from

How is the benchmark data for standard components generated? Renishaw officially provides three comparison methods, and workshops can choose according to their own conditions:

alignment method	Principle	Do you need CMM	Traceability	Applicable scenarios
CMM Compare (CMM Comparison Method)	Measure standard parts with CMM and generate CAL calibration file, transfer to Equator	need	highest	Require traceable mass production
Feature Compare	Read the actual values of each feature of the standard parts from the inspection report and manually input them into the system	Not needed	middle	Quick production change, no CMM scenario
Golden Compare (Gold Standard Component Comparison Method)	Directly calibrate with Golden Master, assuming it meets the nominal value on the drawing	Not needed	lower	Quick calibration, simplest setup

The essential difference between the three methods lies in “where does the benchmark value of the standard part come from”: CMM Compare extends the absolute accuracy of CMM to the workshop site, with the most complete traceability chain; Feature Compare is suitable for workshops without CMM, where standard part data is manually entered after being measured using other methods such as calibration gauges; Golden Compare is the fastest, but it should be noted that any deviation between the gold standard parts and the nominal values on the drawing will be included in the measurement results.

3.4 Measurement Uncertainty: Accuracy Expression in Comparison Mode

In comparison mode, the measurement uncertainty specification of Equator is± 0.002mm (± 2 μ m), which is the official comparison uncertainty indicator. It should be understood that the meaning of this indicator is “the repeatability of the deviation of the measurement result relative to the standard part”, rather than “absolute coordinate accuracy”. Because of this, the quality of standard parts directly determines the credibility of measurement results – standard parts themselves must be stable, clean, and reliably calibrated, which should be particularly emphasized in subsequent daily use. For scenarios that require absolute coordinate accuracy, the Equator-X 500 absolute measurement mode (ISO 10360-2: 2.1 μ m+L/300, temperature range evaluation of 18-22 ° C) can be selected to directly provide traceable absolute measurement results.

3.5 Closed loop and Data: From “Measurement” to “Process Control”

Equator’s measurement data is not just a bunch of Pass/Tail records. Cooperating with Renishaw’sIPC intelligent process control software(optional component), Equalizer can realize the following functions: sliding average compensation, standard deviation control limit monitoring, one to many feedback updates of one Equalizer to multiple CNC machines, tool wear warning and “sisters cutter” automatic switching suggestions – measurement results are automatically converted into tool compensation values of the machine tool, forming a closed-loop of “measurement analysis compensation”. The measurement data can be simultaneously output to quality systems such as SPC and MES, achieving full process traceability. This is also the core value that sets Equator apart from ordinary gauges: it is not only a detection tool, but also a sensor for process control.

3.6 Complete process of a typical measurement

Applying the above principles to the workshop site, a typical Equator online inspection process is as follows:

Homing: After the system starts, it automatically performs the zeroing action. At this time, the machine is in automatic mode, and only the physical emergency stop button can interrupt it – this is also why the operator must stay away from the work area when starting up;

Program selection: The operator selects the detection program corresponding to the current part from the program list in the Organizer interface, and the program will automatically call the corresponding probe configuration, fixture board information, and standard part data;

Clamping parts: Place the parts into the positioning seat on the fixture plate, and if necessary, press the emergency stop button or switch to manual mode to ensure safety when the operator is near the working volume;

Measurement execution: Start the program, the Equator moves and scans along the preset path, and the SP25 probe continuously picks points along the contour of the part; When encountering features that require different measuring needles, the system automatically goes to the EQR-6 needle changing rack to replace the measuring needles (there is no need to recalibrate after needle replacement, provided that the measuring needles have been pre calibrated);

Result output: The screen displays the deviation values of each feature and the Pass/Tail judgment in real-time, and the data is automatically saved and can be synchronously uploaded to the SPC/MES system.;

Periodic calibration: Measure the standard parts according to the established Re mastering cycle (such as every 2-3 hours or during shift switching), reset the system to zero, and eliminate environmental drift.

Throughout the entire process, the operator’s actions are only “selecting the program installing the parts viewing the results”, which is the fundamental reason why Equator can be accepted by ordinary operators in the workshop – complex measurement strategies are encapsulated in the program, and every step on the workshop site is simple enough. The inspection program for new parts is completed by the inspection engineer during the programming phase, including path planning, probe selection, feature definition, and tolerance setting. This part of the work is usually done offline or online using MODUS Equator software.

4、 Parameter Quick Check Table: 300/500/X-500 View All at Once

The following parameters are all from Renishaw’s official data sheet (including H-5504-8200-06-A, etc.). Readers can verify by referring to the official information:

4.1 Comparison of Core Parameters among Three Models

parameter	Equator 300	Equator 500	Equator-X 500
Working volume XY	Ø300mm	Ø500mm	Ø500mm
Working volume Z	150mm (raised version: 205mm from the base)	250mm (SM25-3 extended by 400mm)	250mm
Repetitive accuracy (2 σ, comparison mode)	± 2 μ m (full temperature range)	± 2 μ m (full temperature range)	± 2 μ m (full temperature range)
Absolute mode accuracy (ISO 10360-2)	—	—	2.1μm + L/300
Maximum scanning speed	100 mm/s	250 mm/s	250 mm/s (absolute)/500 mm/s (comparative)
Maximum moving speed	500 mm/s	750 mm/s	750 mm/s
Maximum workpiece weight	25kg	100kg	100kg
machine weight	25kg	75kg	140kg (with an additional 50kg base)
Probe	SP25/SP25M three-axis analog scanning probe	SP25M three-axis analog scanning probe	SP25M three-axis analog scanning probe
Scanning module	SM25-2 (Standard)/SM25-3	SM25-2 / SM25-3	SM25-2
Measuring needle length	Straight rod 50-105mm, curved rod ≤ 83mm (SM25-2)	ditto; SM25-3 up to 200mm in length	Ditto.
Needle changing rack	EQR-6 six position automatic needle changing rack	EQR-6	EQR-6

4.2 General environment and specification parameters (consistent across the entire system)

parameter	value
Operating Temperature	+5 ° C~+50 ° C (Equator 300 is+10 ° C~+40 ° C; no constant temperature required, any temperature change rate)
Storage temperature	-25°C ~ +70°C
Humidity	Maximum 80% RH @ 40 ° C
Comparing Uncertainty	±0.002mm
Monitor	1280×1024（DVI/VGA）
Protection rating	Machine IPX0 (indoor)/base IPx2
power	Single phase power supply, no need for compressed air
Fixture plate thread	M8/M6/1/4-20 optional
Calibration time (Re mastering)	Equivalent to measuring the time of a production part

Note: The detailed specifications for different batches and configurations may vary slightly. Please refer to Renishaw’s latest official data sheet for details.

5、 Applicable scenarios: Which workshops are most suitable for introducing Equator

5.1 Three typical industry portraits

Automotive parts manufacturing: Engine cylinder blocks, cylinder heads, gearbox housings, steering knuckles, brake discs and other components have large quantities, fast cycles, and moderate to strict tolerances. OEMs generally require suppliers to provide SPC data.. This type of scenario is Equator’s “home ground” – the measurement pace must keep up with the production pace, and the detection data must be electronically traceable. In the automotive industry case, Fulin’s use of Equator 300 reduced engine part measurement time by 80% (from 6 minutes to 1 minute for CMM), Tremec Mexico (Daimler parts supplier) reduced workshop inspection time by 85%, Kishan Auto reduced inspection time and cost by 80%, and maintained measurement accuracy within a temperature difference range of 21 ° C.

Aviation manufacturing and hot end component processing: Aviation parts have strict tolerances (often in the range of ± 0.025-0.076mm), extremely high traceability requirements, and expensive tooling costs.. Meyer Tool has replaced at least 4 expensive hard gauges with 1 Equator in the machining of hot end components of aircraft engines. The single piece inspection can fully keep up with the unit rhythm in 2-6 minutes, and the data is connected to the SPC system for piece by piece traceability. The official case data of High Tech Engineering shows that its single piece production cost has been reduced by 27%, and the scrap rate has significantly decreased.

Precision manufacturing and multi variety mixed line production: The characteristics of scenarios such as hydraulic components, pneumatic components, precision hardware, electronic casings, medical devices, etc. are “multi variety, small batch, and frequent production changes”.. The cost of the hard gauge mode is extremely high here – each part requires a dedicated set of gauges; Equator’s programmatic measurement allows for production changes to be completed in just a few minutes by simply switching programs and changing fixture boards. The National Institute of Metalworking Skills (NIMS) uses Equator for training part testing, reducing testing time by 85%, which indirectly indicates its low operating threshold and fast start-up.

5.2 What kind of parts are suitable for Equator measurement

From the characteristics of the parts, parts suitable for Equator usually have the following features:

The size is within the working volume of the equipment: The 300 type is suitable for small and medium-sized parts within Ø 300mm × 150mm (raised version: the working volume is 205mm away from the base, and the Z stroke is still 150mm), and the 500 type is suitable for larger parts within Ø 500mm and 250mm in the Z direction (SM25-3 can reach 400mm);

Weight within the bearing range: The maximum weight of the 300 type workpiece is 25kg, and the maximum weight of the 500 type workpiece is 100kg;;

There is a demand for multi feature and multi angle detection: Equator covers a large number of measurement points in one scan, and with EQR-6 automatic needle changing, the more complex the parts, the more advantages they can demonstrate.;

Need to quantify deviation data instead of simple on-off judgment: Output deviation values and trend data, which can be directly integrated with the SPC system..

In terms of testing rhythm, the scanning speed of Equator 300 can reach 100 mm/s (SP25/MODUS version, corresponding to Renishaw data sheet H-5504-8200-06-A), with a maximum data acquisition capability of about 1000 points/second; The scanning speed of Equator 500 can reach 250 mm/s; The Equator-X 500 can achieve a scanning speed of 500 mm/s in comparison mode. Taking Fulin’s case as a reference: Engine parts can be compressed from 6 minutes of CMM inspection to 1 minute of Equator inspection, and the inspection cycle can be fully integrated into the production flow, achieving “simultaneous processing and inspection”.

In terms of tooling planning, it is recommended to design fixture boards according to the “part family” concept: plan parts with similar appearances and compatible detection features onto the same fixture board (M8/M6/1/4-20 thread specifications are optional) to reduce the number of board changes; Try to merge detection tasks from different processes on the same board to further reduce the number of calibrations. Meyer Tool achieves common machine detection of 5 part numbers within a unit through a strategy of combining multiple fixture boards and parts.

5.3 Suggestions for Import Methods

The recommended import path for the workshop that is experiencing Equator for the first time is to first select a processing unit with a relatively concentrated variety of parts (3-10 types) and customer data traceability requirements to pilot and deploy one, to verify the testing cycle, standard part management process, and operator acceptance; After verification, gradually promote it. Renishaw and domestic service providers can provide demonstrations, machine testing, and programming support to help workshops make decisions using measured data.

6、 The difference in positioning between Equator, CMM, and hard gauges: one table to understand

Many readers are confused when they first encounter Equator: “Is it more like a gauge or more like a CMM? The answer is: neither of them is completely similar, it is an independent new product category. Compare the positioning differences of the three with a table:

Comparative Dimension	Traditional hard gauges	CMM Coordinate Measuring Machine	Equator comparator
Measuring principle	Standard parts+on-off judgment	Absolute coordinate measurement	Comparison of standard parts, output deviation
Environmental Requirements	Workshop available	Constant temperature measuring room	Workshop available (500/X-500:+5 ° C~+50 ° C; 300:+10 ° C~+40 ° C, no need for constant temperature)
detection speed	Second level reading	Minute level (common for single items lasting 5-30 minutes)	Scanning in seconds to minutes (Fulin case single item takes 1 minute)
flexible	One piece, one inspection tool. Once revised, it will be scrapped	Universal, test any part after programming	Programmed, multiple parts share one unit
Changeover time	Hours~days (changing inspection tools+revalidation)	Medium (programming+clamping)	A few minutes (changing program+changing fixture board)
Number of measuring points	Fixed 6-20 measuring points	On demand sampling	Scan and collect hundreds or thousands of measurement points
data capability	On/off/meter readings, mostly on paper	Complete coordinate data	Deviation value+trend+SPC data
Precision expression	Determination of continuity and termination	ISO 10360-2 Absolute Accuracy	Repetitive accuracy ± 2 μ m (2 σ) over the entire temperature range
Traceability	weak	Strong (Measurement Room Standard)	Indirect traceability through standard parts (CMM Compare)
cost structure	Each piece is a set, with modifications and additions	The equipment is expensive and requires a constant temperature control room	One investment, program reuse

The core conclusion revealed by this table is that hard gauges win in “speed”, CMM wins in “accuracy”, and Equator wins in “fast+accurate+flexible in the workshop”. It is not a substitute for any party, but fills the long-standing gap in the category of “high-frequency testing in the workshop”. For extremely simple scenarios such as “single feature, ultra large batch, and only making on/off judgments”, hard gauges still have value; CMM is still irreplaceable for the scenario of “final arbitration and complex geometric tolerance review”; And the daily online detection task between the two is Equator’s home ground.

7、 Common Problems and Misconceptions

Misconception 1: “Equator can only measure one type of component, essentially it is a gauge

This is the most common misunderstanding. The measurement capability of Equator is supported by software programs. One device can be pre programmed to store detection programs for multiple parts, combined with multiple quick change fixture boards and EQR-6 automatic needle changing racks. Production changes only require switching programs. Meyer Tool uses an Equator to simultaneously detect 5 part numbers (belonging to two engine projects) within the unit, and the replacement is completed within seconds. Gauge is “one part, one set of assets”, Equator is “one equipment to undertake all parts”.

Misconception 2: “Without CMM, Equator cannot be used”

No need. Among the three comparison methods, only CMM Compare requires CMM (used to calibrate standard part generation) CAL file); Feature Compare allows for manual input of standard part feature values; Golden Compare uses gold standard parts for direct calibration, with the simplest setup. Workshops without CMM can start with Feature Compare or Golden Compare and upgrade to CMM calibration when conditions permit to achieve higher traceability.

Misconception 3: “If the temperature in the workshop fluctuates greatly, precision equipment will definitely be inaccurate when placed in the workshop

This is the cognitive inertia of traditional CMM. The design goal of Equator is the workshop site: the repeatability accuracy of ± 2 μ m (2 σ) is given in the full temperature range of+5 ° C~+50 ° C (+10 ° C~+40 ° C for 300 type) at any temperature change rate; The carbon fiber metering framework suppresses thermal deformation structurally; The Re mastering mechanism allows temperature drift to “zero” at any time, and the calibration time is only equal to the time it takes to measure a production part. The case of Kishan Auto maintaining measurement accuracy under a temperature difference of 21 ° C directly confirms this point.

Misconception 4: “Compared measurement is not as advanced as absolute measurement, and the data is unreliable

Comparative measurement and absolute measurement are two different measurement strategies, each with its own applicable scenarios, and there is no distinction between high and low. The advantage of comparative measurement is “fast+resistant to environmental interference”, but the cost is “result dependent on the quality of standard parts”; The advantage of absolute measurement is “direct traceability”, but the cost is “sensitivity to the environment and limited speed”. The Equator-X 500 combines two strategies with a dual-mode design: a comparison mode for large-scale high-speed detection, and switching to absolute mode when absolute coordinates are required. The choice of strategy depends on the batch size, tolerances, and on-site conditions of the parts.

8、 FAQ: High frequency questions about Equator comparator

The following questions are compiled from the most commonly asked real questions by workshop users when learning about Equator, arranged in the order of “equipment positioning environment calibration capability operation traceability landing”, for readers who are new to it to quickly refer to.

Q1: What is the Equator comparator really? Is it a measuring machine or a measuring tool?

A: It is an independent category – workshop level high-speed comparison measurement system, officially known as Gauging System. It is as fast as a gauge, can be used in the workshop, and is programmable and outputs digital data like a measuring machine. A more accurate statement is that it is a measuring device that works on the principle of comparison, positioned between the hard gauge and CMM, and undertakes online inspection tasks next to the production line.

Q2: Does Equator need a constant temperature workshop? Will placing it next to the machine tool affect accuracy?

A: No need for constant temperature. The working temperature range of Equator is+5 ° C~+50 ° C (+10 ° C~+40 ° C for 300 type), and the repeatability accuracy is ± 2 μ m (2 σ), which is effective throughout the entire temperature range and applicable at any temperature change rate. In actual use, temperature changes will be compensated through Re mastering – calibration only takes the time to measure one production part at a time, and Meyer Tool and other customers execute it every 2-3 hours with stable accuracy. Therefore, it can be placed next to the machine tool or inside the production line.

Q3: How often does Equator need to be recalibrated (Re mastering)?

A: There is no unified fixed cycle, which depends on the amplitude of temperature changes in the workshop and the requirements for accuracy. The principle is: the larger the temperature change, the stricter the tolerance, and the more frequent the calibration. The common practice is to perform Re mastering once per shift (e.g. every 2-3 hours); When the temperature is stable, it can be appropriately stretched. Due to the fact that each calibration takes about the same amount of time as measuring one part, the cost is very low, and the workshop can confidently increase the calibration frequency. The simplest signal to determine whether calibration is necessary is to perform a Re mastering test before continuing with batch measurements after significant changes in workshop temperature (such as day night temperature differences, seasonal changes, and air conditioning on/off).

Q4: What size and weight of parts can Equator measure?

A: The working volume of Equator 300 is Ø 300mm × 150mm (higher version: the working volume is 205mm away from the base, and the Z stroke is still 150mm), with a maximum workpiece weight of 25kg; Equator 500 is Ø 500mm × 250mm (with SM25-3 scanning module, the Z direction can reach 400mm), with a maximum workpiece weight of 100kg. When selecting, in addition to considering the size and weight of the parts, the length requirement of the measuring needle should also be taken into account – deep cavity parts require long measuring needles, and Equator 500 with SM25-3 supports measuring needles up to 200mm in length.

Q5: Can workshop workers operate Equator? Do you need a programming background?

A: Daily operations do not require programming background. The operator is faced with the Organizer interface: selecting parts from the program list, running with one click, and viewing results, similar to operating an “advanced inspection tool”. The programming work is completed by the testing engineer using MODUS Equator software (drag and drop programming, no code required), and the tooling engineer usually quickly gets started after transitioning. The case of NIMS using Equator for training and teaching, reducing testing time by 85%, also indirectly indicates that its entry threshold is not high.

Q6: Can Equator’s measurement results be traced back to CMM standards?

A: Okay. When using CMM Compare method, the standard parts are first calibrated and generated by CMM CAL calibration file, Equator’s measurement results are indirectly traced back to CMM standards, and the traceability chain is complete; Meyer Tool also verified the consistency between Equator results and CMM results, with deviations controlled within 10% of the allowable tolerance range. If CMM is introduced in the workshop in the future, it can also be smoothly upgraded from Feature Compare/Golden Compare to CMM Compare. The measurement data can be integrated with SPC/MES systems to achieve full process quality traceability.

Q7: What are the requirements for installing Equator? Does it occupy a large area?

A: The installation conditions are very “workshop friendly”: the whole machine only requires a single-phase power supply, no compressed air, no foundation or temperature control room. Taking the Equator 300 as an example, the external dimensions of the host are approximately 570mm × 500mm × 700mm (with a height of 850mm for the raised version), and the machine weight is 25kg (with a height of 27kg for the raised version). Two people can transport it with the help of the handles at the four corners of the base; The Equator 500 machine weighs 75kg. It is recommended to place it on a flat and sturdy surface during installation, with a clearance of about 1 meter around the machine to prevent collisions; The controller can be placed upright or horizontally, and attention should be paid to maintaining a distance of at least 10cm between the front and rear cooling fans and any surface. The system is fully assembled at the factory, and only needs to be connected to the power supply, monitor, keyboard, mouse and other peripherals on site. It can be put into use after being powered on. In terms of daily maintenance, the main tasks are to keep standard parts clean, perform Re mastering on a regular basis, and regularly check the status of the measuring needles; Some users have reported that there is a risk of aging in the coating of the grating ruler after 3-5 years of use. It is recommended to plan spare parts and maintenance in advance, and sign an annual maintenance contract with the service provider to pre manage maintenance risks.

9、 Conclusion: A comparison measurement system designed for the workshop

Returning to the definition at the beginning: Equator is a workshop level high-speed comparison measurement system launched by Renishaw, which establishes benchmarks using standard parts and determines part qualification based on deviation values. It maintains a repeatability accuracy of ± 2 μ m (2 σ) in the full temperature range of+5 ° C~+50 ° C (+10 ° C~+40 ° C for 300 type). It consists of a hexapod parallel mechanism host, controller, SP25/SP25M scanning probe, EQR-6 automatic needle changing rack, calibration parts, fixture board, and Organiser software. It adapts to temperature fluctuations in the workshop through the Re mastering mechanism and achieves flexible detection of multiple parts through software programs.

The core information of this article can be summarized into three sentences for the workshop that is evaluating online inspection solutions:Firstly, Equator fills the gap of “high-frequency on-site inspection in the workshop”, which neither replaces the ultimate arbitration position of CMM nor denies the value of hard gauges in extremely simple scenarios; Secondly, its accuracy is based on the logic of “comparison”, and the quality of standard parts and calibration discipline are the prerequisites for using it well; Thirdly, it is a software driven device, and the more accumulated the program, the stronger its detection ability, which is the most essential difference between it and traditional gauges. If your workshop is struggling with three issues: expensive gauges, slow CMM, and temperature not meeting standards, Equator is worth focusing on. Suggestions for equipment selection and scheme design, combined with specific component and working condition evaluations, can be consulted with professional Renishaw equipment service providers – Ningbo Jiangce Technology. As a maintenance and sales service provider for Renishaw measuring equipment, we can provide technical consultation, demonstration, installation and commissioning, and after-sales support services for Equator comparison instruments, helping workshops complete every step from understanding to implementation with measured data.

Further Reading

Why are workshops starting to eliminate hard gauges? The evolution from “one piece, one gauge” to Equator online measurement

What is the difference between comparative measurement and absolute measurement? What kind of workshop should be used

Equator vs Fixture vs CMM vs Gas and Electricity Meter: How to Choose Four Measurement Plans in the Workshop

How does Equator maintain ± 2 μ m repeatability accuracy when workshop temperature fluctuates by 10 ° C

The technical parameters of this article are based on Renishaw’s official data sheet (including H-5504-8200-06-A, etc.), Equator user manual, and official public case studies. Equator, MODUS, Organiser, SP25, and Resolute are registered trademarks of Renishaw; If the third-party software mentioned in the article (such as PC-DMIS, CALYPSO) involves integration, it belongs to the third-party compatibility scheme. The case data in the article are all from official materials released by Renishaw. The specific effects vary depending on the parts and working conditions, and do not constitute any form of performance commitment. You can consult professional Renishaw equipment service providers for equipment selection, scheme design, and after-sales service.

The technical parameters of this article are based on Renishaw’s official data sheet, user manual, and installation guide (including H-5504-8200-04-A/06-A, H-6078-8310-01, H-6620-8560-01-A, etc.). The case data in the article are all from Renishaw’s official public information, and the specific effects vary depending on the parts and working conditions, and do not constitute any form of performance commitment. If the third-party software mentioned in the article (such as PC-DMIS, CALYPSO) involves integration, it belongs to the third-party compatibility scheme. For equipment selection, scheme design, and after-sales service, please consult Ningbo Jiangce Technology (Renishaw equipment maintenance/sales service provider).

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