Innovative Structures

The PMT GAMMA measuring arm boasts a design of dual suspension support structure which significantly increases the overall stability of the machine. Featuring the world’s first external decoupling and internal balancing system, it achieves an impressive integration of stability and flexibility, striking an ideal balance between ultra-high accuracy and ease of use.

New Upgrades

• High Power Efficiency: The GAMMA measuring arm offers a battery life exceeding 16 hours for single battery and up to 32 hours for double batteries in low-power mode.
• Enhanced Versatility: Designed for high adaptability, the GAMMA portable measuring arm supports a wide range of probes, including smart sensing probe systems and laser forks. It is also compatible with an 8-axis rotary worktable and can be equipped with a high-precision blue light scanner. These new features greatly enhance the equipment’s flexibility and convenience for on-site measurements, improving overall measurement efficiency by more than 60%.
• Broad Software Support: Compatible with PMT’s self-developed CAM3 software and leading global 3D measurement platforms, the machine easily meets the high demands of modern industrial measurements.

As PMT continues to make significant investments in its full production lines, the GAMMA measuring arm has been widely applied across manufacturing industries at home and abroad such as automotive mold making, shipbuilding, and aerospace, consistently pushing the boundaries of global measurement technology.

Industrial Applications of PMT GAMMA Measuring Arm

Automotive Inspection Solutions

• Measurement of Sheet Metal Parts

The PMT GAMMA E portable measuring arm stands out for its exceptional cost-effectiveness, providing high precision measurement results while reducing overall costs.

To meet the complex demands of sheet metal inspection, the lightweight GAMMA E is compatible with a variety of PMT’s self-developed accessories, including electric clamping vacuum plate, folding adjustable tripod, and circular disc integrated magnetic mount, offering easier and faster installation.

During inspection, engineers mount the hardware on the fixture base plate following a predefined measurement path and specified conditions, then establish alignment using reference holes to analyze the workpiece. To overcome the challenges of measuring multi-layer sheet metal, the “Inverted Normal Orientation Inspection Method” automatically identifies clamping errors and accurately detects deformation deviations, improving the capability of detecting industrial design issues by more than 50%.

• Measurement of Dashboard Assemblies

In the automotive industry, inspecting car dashboard assembly requires high accuracy, especially for narrow location holes and precise surface alignment. To meet these demands, the PMT GAMMA M 7-axis 3.5m ScanArm (a portable measuring arm equipped with a blue light scanner) was applied in a factory to enhance the quality control processes for interior trims through innovative technology.

By simply adjusting the position of the probe, the next-generation GAMMA and laser scanner enables 90-degree elevated scanning, effectively capturing the complex surfaces of the instrument panel top. This capability allows it to precisely address inspection requirements in the critical transition zone between the instrument panel and the windshield. In a vehicle project, this technology simplified a three-step clamping process into a single operation, achieving a data completeness rate of up to 99%.

The GAMMA portable cmm’s rapid switch between contact measurement and non-contact scanning enables accurate verification of hole positions and analysis of assembly gaps between trims and the base structure, delivering a flexible, efficient, and reliable inspection solution that meets the demands of smart automotive manufacturing.

Engineering Machinery Measurement Systems

• Measurement of Pipeline Parts

Equipped with a newly designed double handle featuring a force-isolation design, the PMT GAMMA measuring arm can be quickly mounted onto complex tubing inspection worktable by a single person, boosting installation speed by over 70%. This setup enables full-process precision verification of initial bending parameters in bent tube products, significantly enhancing accuracy and productivity.

During the measurement process, the operator uses a smart probe to perform contact sampling on the workpiece surface, accurately capturing key parameters such as pipe diameter and bending angle. The system can generate comparison charts of nominal, measured, and deviation values, along with structured inspection reports, providing clear visual data to optimize whole process.

With its external decoupling and internal balancing system, the portable cmm maintains smooth and stable operation even in a tight space, such as narrow pipe interfaces or vertical risers, which overcomes a key bottleneck of inspecting large or irregularly shaped parts in the engineering machinery industry.

• Measurement of Chassis for Plowing Machine

The positional tolerance of the transmission mechanism from the wheel axle to the engine mounting point has directly affected power transmission capability, overall operational stability, and the service life of critical components in a plowing machine.

Designed for on-site measurement, the PMT GAMMA measuring arm features a temperature monitor that provides real-time compensation every five minutes and records temperature changes over time.

When abnormal fluctuations occur in the tolerance data of the transmission mechanism, engineers can reference the historical temperature records to quickly identify the issue using tilt diagnosis, which also monitors the cmm’s installation status in real time.

The intelligent prompts of measuring arm guide engineers in the proper use of the device and help adjust equipment fastening methods, thereby reducing operational errors. In one inspection case at a leading enterprise, the detection rate for plowing machines increased by more than 50%.

Quality Control in Shipbuilding

• Measurement of Outboard Motor Covers

For core defect issues such as bearing hole wear and sealing surface deformation in motor covers for ship parts, the GAMMA measuring arm can be flexibly integrated with various popular 3D measurement software. It enables simultaneous inspection of circles, diameters, and flatness, accurately capturing critical dimensions. The measurement results are then fed back to engineers, allowing for the generation of processing drawings and establishing a full workflow of “measurement – modeling – repair.”

Computer Aided Measuring 3D (CAM3) is a powerful measurement software developed by PMT, featuring fully independent core algorithms and certification from PTB – an internationally recognized authority in metrology, is known for its strict global standards for measurement reliability and nanometer-level accuracy test. When paired with the PMT portable measuring arm, CAM3 ensures encrypted data transmission and secure storage, safeguarding critical inspection data in the marine machinery industry.

• Demo Part Scanning

In UK, the PMT GAMMA P equipped with a blue light scanner efficiently completed the full-size scanning of a highly reflective metal demo part. With a laser point cloud acquisition rate of 1.2 million pts/sec and an extended scanning distance of 220 mm, combined with its built-in intelligent ventilation system, the machine delivers outstanding consistency, easily meeting the demands of even the most challenging industrial scenarios both at home and abroad.

The force-isolation design, inspired by the “breaking the whole into parts” principle, decouples the handgrip from the scanning head to improve operability. Additionally, the device is over 50% lighter than the previous generation.

PMT GAMMA Portable Measuring Arm : The applications don’t stop there!

GAMMA measuring arm is widely applied across various industries. In aerospace, it has successfully performed precise measurements of large-scale components up to 12 meters in length. In rail transportation, this portable measuring arm, with reach up to 4.5 meters, has helped customers expand their measurement capabilities. In the medical industry, it quickly verifies the accuracy of robot dynamic tracks and offers optimized solutions for adjusting parameters…

Bring Samples, Let’s Find Out More Function and Uses about the PMT GAMMA Portable Measuring Arm!

The post PMT GAMMA Portable CMM: Precision Measurement Solutions for Industrial Applications appeared first on PMT.

In recent times, as tire performance requirements continue to rise in response to the automotive industry’s evolving demands, tread patterns have also become increasingly complex, which has driven the need for higher precision in tire mold manufacturing. However, traditional inspection tools such as calipers and micrometers are no longer adequate for ensuring accuracy, especially when measuring complex geometries and fine surface details. In this context, the accuracy of tire molds is not just a technical requirement but a key factor in a tire’s overall performance and market competitiveness.

What are the Advantages of a Portable Measuring Arm?

Portable measuring arm, also known as portable CMM (Coordinate Measuring Machine), is a high-precision device that simulates the flexible movements of a human arm through multiple joints. As an advanced portable measurement solution, the PMT measuring arm offers significant technological advantages for tire mold inspection.

• High Precision

A portable measuring arm is equipped with high-precision encoders on each axis, ensuring micron-level accuracy, comparable to the thickness of a human hair. This advanced feature enables the portable CMM to sustain exceptional precision even for on-site measurement, thereby fully satisfying the high accuracy requirements for tire mold inspections.

• Great Adaptability

The ergonomics design of the PMT portable CMM makes it portable and easy-to-use, ensuring any complex structures and fine tread patterns in tire mold inspections can be covered.

• Quick On-site Inspection

The portability of the measuring arm removes the need for fixed measurement scenarios, allowing rapid setup and inspection directly at the shop floor, leading to a more than 40% increase in overall production efficiency.

• Rapid Data Analysis

By enabling a comparison between the collected measurement data and the CAD model, the PMT Arm can quickly output data automatically, help reduce human errors, refine manufacturing process, and significantly enhance quality control efficiency.

How to Measure Tire Mold with Portable Measuring Arm?

Steps for measurement of tire molds：

• Establish Coordinate System through 3D Measurement Software

During on-site measurements, workpieces are typically complex and vary in size. After connecting the measuring arm to the computer, the following steps are usually carried out:

1. Import the CAD Model. After importing the CAD model, the PMT engineer will remove unnecessary components (such as cylinders, connecting blocks, valve islands, brackets, screws, etc.) based on the measurement requirements, retaining only the modules that need to be inspected.
2. Establish the Coordinate System. Make sure the measured data is aligned with the nominal data and construct positional relationship between PMT Arm and measured object. (usually using methods such as the surface point alignment, center point of the plane axis, iteration, etc.).

• Capture Data on Your Parts

1. Data Collection. Take points from the measured object through probe of the measuring arm.
2. Data Analysis. Based on the technical requirements, perform an analysis of the positions of holes and surfaces. Evaluate the shape deviations, positional accuracy and other parameters of the measured object. Additionally, highlight the critical dimensions within the 3D measurement software for clear identification.
3. Data Comparison. A color map is assigned to the workpiece surface points based on tolerance requirements. By comparing the map’s colors with preset tolerance indicators, engineers can quickly identify dimensional deviations in the tire mold cavity and determine if they fall within specified limits, making adjustments as needed.?

• Mass-measure Tire Molds vs Manual Inspection

Since tire molds are often mass-produced, random sampling or batch inspections of the same product are frequently required. Different from manual inspection, the New Piece command in 3D Measurement Software can be applied for repeated inspections using a portable CMM. This approach eliminates the need for data editing or processing, allowing measurements to be taken according to the procedure established during the initial inspection. The report can also be exported with a single click, ensuring both efficiency and accuracy.

• Generate Required Reports for Factory

All measurement results from the portable arm can be batch-generated into PDF reports based on actual requirements. These reports include the establishment of the coordinate system, basic information of the measured workpiece, measurement parameters, results, and error analysis. Afterwards, the inspectors can share the measurement results with relevant departments and personnel to support improvements in production processes or design, thereby enhancing product quality.

What Our Customers Think about the PMT Measuring Arms?

From a Quality Manager in a Leading Tire Manufacturer:

“PMT’s portable measuring arm is convenient and easy to use in our daily quality check for tire molds. Its user-friendly design enables our new operators in completing measurement tasks very fast. We consistently benefit from its great stability and high-precision throughout the inspections. Beyond the excellence of PMT Arm, the 24/7 technical support in PMT Technologies has been vital in solving our critical production issues, reducing the defect rate of tire molds, enhancing the quality control standards and production capacity.”

Conclusion

With the continued advancement of global Industry 4.0, the PMT portable measuring arm is expected to play a significant role across various industries through its latest technologies, portability, easy operation, stability, and high-precision. As part of China’s push for independent innovation, intelligent inspection solutions – such as portable CMMs – will help enterprises overcome critical quality bottlenecks, offering essential technical support for China’s progress on the global stage forward.

The post Tire Mold Accuracy Problems？See How Portable Measuring Arm Solve Them appeared first on PMT.

In modern precision manufacturing, Coordinate Measuring Machines?(CMMs) are key equipment for ensuring dimensional accuracy and quality consistency of products. In order to ensure stable movement and safe control of the probe during the measurement process, pneumatic components – especially air cylinders – play an indispensable role.

Compared with the traditional electric drive method, air cylinders have the advantages of compact structure, fast response, high repeatability, etc. They are very suitable for Z-axis lifting and lowering control, probe up and down protection, measurement displacement buffer and other scenarios in the CMM. At the same time, the cylinder has good durability and low energy consumption, which helps to improve the efficiency of the whole machine and extend the life of the equipment.

Application Scenarios: The Key Roles of Air Cylinders in CMMs

Within a coordinate measuring machine, air cylinders are used in several essential applications, including:

1. Z-Axis Balancing and Anti-Drop Protection
   To prevent the probe from falling in case of power loss or air supply failure, CMMs are often equipped with compact air cylinders as a counterbalance system. By continuously providing upward air pressure, the cylinders help offset part of the probe’s weight, ensuring smoother vertical motion and offering protective buffering during emergency stops.
2. Probe Up-Down Control
   Some CMM systems use air cylinders to drive the probe or stylus for fast vertical switching. Combined with solenoid valves, this setup enables accurate positioning, helping to improve measurement efficiency and reduce probe wear.
3. Automatic Clamping and Auxiliary Movements
   In certain automated CMM setups, air cylinders are also used to operate workpiece clamping devices, platform positioning systems, or probe-changing mechanisms. These auxiliary movements help streamline the measurement process and enhance automation.

Technical Highlights: How Air Cylinders Affect Accuracy and Efficiency

In CMM, although the cylinder is only an actuator, its performance directly affects the overall accuracy and efficiency of the equipment. Here are a few key technical points:

1. Repeat Positioning Accuracy

High-precision measurement requires the probe to reach the same position every time when moving up and down. High-quality cylinder adopts precision machining process, with high sensitivity magnetic sensor, to ensure that the deviation of repeated movements is controlled within ± 0.01mm, to guarantee the reliability of data from the source.

2. Action response and speed control

During the measurement process, the probe moves frequently, which requires the cylinder to have a fast response without violent impact. Cylinder with buffer function (such as rubber buffer, air buffer) can effectively absorb kinetic energy in high-speed operation, preventing the probe from “shaking” or “overshooting”, improve the measurement efficiency and protect the precision components at the same time.

3. Stable operation and low noise

Compared with electric drive, there is no gear transmission and friction sound during the cylinder operation, which is better in clean room or silent demand occasions, and more suitable for precision laboratories and high cleanliness workshop.

In addition, the cylinder structure is simple and easy to maintain, which also provides a solid guarantee for the long-term stable operation of the CMM.

Future Trends: Intelligent Measurement Drives Integrated Upgrades

With the rise of smart manufacturing, CMMs are evolving toward “high-precision + automation + intelligence”:

Growing Demand for Automation Accessories:

Systems such as automatic probe changers or workpiece clamping mechanisms require auxiliary cylinders with higher precision and reliability.

Modular and Digital Integration:

Control systems now demand faster responses and traceability from all modules—including air cylinders—driving the need for sensor feedback and deeper integration.

Closer Human-Machine Collaboration:

Future CMMs will work more closely with collaborative robots and automatic material handling systems, pushing actuators toward miniaturization and intelligent control.

PMT?continues to track the latest system upgrades in precision measurement, refining our in-house coordinate measuring machines, metrology software, and high-accuracy encoders to offer advanced solutions for manufacturing enterprises.

Conclusion: Focus on Precision, Drive Efficiency — Choose PMT

In precision measurement, even the smallest auxiliary movement can impact overall efficiency and measurement accuracy. PMT, as a specialist in high-end measurement technology, focuses on core products such as coordinate measuring machines, software, and high-accuracy encoders. We are committed to helping customers enhance automation in their measurement workflows and improve overall system stability.

The post Improving CMM Accuracy and Efficiency Through Air Cylinder Applications appeared first on PMT.

With its high accuracy, automation and traceability, CMM has become an indispensable quality control tool in the automotive industry. From parts processing, assembly process to final factory inspection, CMMs play an important role in every key link, significantly improving product consistency and reliability.

CMM basics

CMM is a high-precision measuring equipment that obtains geometric data of the workpiece by measuring the displacement of the probe in the X, Y and Z directions. The measurement results can be used to determine whether the part meets the design requirements, or to compare and analyze with the CAD model. According to the different structural forms, CMMs can be broadly classified into the following categories:

• Bridge/gantry type: commonly used for measuring small and medium-sized parts with high precision requirements. Stable structure, suitable for use in constant temperature workshop, suitable for automated inspection process.
• Horizontal/cantilever type: suitable for inspection of large sheet metal parts such as doors, side enclosures, instrument panel brackets, etc. It is easy to fix the workpiece and extend the measuring head with high efficiency.
• Articulated arm type: Flexible structure, easy to move and on-site measurement. It is suitable for quick positioning and sampling inspection of bodywork or whole parts after welding.

These CMM equipments not only measure dimensional parameters, but also output geometric quantities such as form and position error, contour deviation, etc. They are widely used in various inspection scenarios in the automotive industry.

Specific application of CMM in automotive production line

1. Inspection during parts manufacturing

In automotive manufacturing, key parts such as engine block, transmission housing, steering knuckle, etc. require extremely high dimensional accuracy. In order to ensure their processing quality, factories usually implement selective sampling on the production line, utilizing CMM to inspect each processing batch.

For example, when inspecting flatness or hole position, the CMM can accurately determine whether the tolerance range is exceeded by establishing a spatial coordinate system and comparing the consistency of the measured direction with the theoretical direction. At the same time, by measuring the positional tolerance such as positional degree and coaxial degree, it can effectively avoid dimensional interference or accuracy accumulation problems during the assembly process.

2. Positioning and error calibration during assembly

CMM is not only used for single-piece inspection, but also widely used for positioning and calibration in whole vehicle or module assembly. Taking the chassis and body fitment as an example, CMM can quickly establish the reference system of the whole vehicle, measure the positional deviation of the assembly holes or welding parts, and ensure the consistency of the whole vehicle installation.

In addition, together with CAD model comparison software, CMM can automatically determine whether the measurement results are within the set tolerance zone, and quickly determine OK/NG. deviations found during the inspection can also be used for reverse analysis and assist in the process of rectification, to improve manufacturing accuracy and product qualification rate.

Geometric Tolerance Analysis and Reference Management

The shape and position errors of automobile parts directly affect the assembly accuracy and the performance of the whole vehicle. Through the spatial coordinate data, the CMM is able to accurately detect various shape and position errors, such as flatness, perpendicularity, position, cylindricity, etc., and compare them with the design standards for judgment.

In the measurement process, a clear measurement datum system must be established first. These datums include positioning surfaces, assembly holes, datum axes, etc., which are the reference basis for the measurement data. the CMM can define the measurement datums by means of a point cloud or geometric fitting, which ensures the accuracy and repeatability of the error analysis.

In addition, for complex geometries (e.g., engine cylinder heads or aluminum die-casting structures), the CMM can also capture the shape of local details to assist in design optimization, machining corrections, and assembly gap control, truly achieving closed-loop quality management.

Sources of CMM Measurement Error and Ensuring Data Reliability

While CMMs offer high precision, several factors can still influence measurement accuracy:

To ensure data reliability, manufacturers often use temperature-controlled metrology rooms, thermal compensation software, and trained operators. Advanced CMMs also feature error compensation systems that self-calibrate or use reference artifacts to enhance accuracy.

Conclusion: CMMs Empower Smart Manufacturing in the Automotive Industry

As the automotive industry evolves toward electrification, lightweighting, and intelligence, part designs are becoming more complex, raising the bar for precision and efficiency in quality control. CMMs are moving beyond traditional inspection roles, integrating into production control systems as key enablers of smart manufacturing.

Looking ahead, CMMs will increasingly interface with automated loading systems, robotic arms, and inline inspection platforms to create fully digital, closed-loop quality systems. For automotive manufacturers, selecting the right CMM type and measurement software—alongside structured quality workflows—will be vital for gaining a competitive edge in both product quality and brand trust.

The post The Application of CMMs in the Automotive Industry appeared first on PMT.

Let’s break down what CMM accuracy really means, what affects it, and how to make sure your equipment lives up to your quality expectations.

What Is CMM Accuracy?

CMM accuracy measures how closely the machine’s results match the true dimensions of a part. It’s commonly evaluated by two key indicators:

• Volumetric Length Measuring Uncertainty (E)
• Probing Uncertainty (R)

These are clearly defined in international standard ISO 10360-2 and its Chinese equivalent GB/T 16857.2-2006.

According to GB/T 16857.2-2006 (Coordinate Measuring Machines—Part 2: Performance Evaluation by Length Measurement), accuracy evaluation involves:

• Measuring known lengths at different positions and directions within the machine’s volume.
• Ensuring that all measured values fall within the maximum permissible error (MPE) stated by the manufacturer.
• Using certified calibration tools like step gauges or gauge blocks to verify linear dimensions.
• Assessing probing uncertainty by measuring a calibrated sphere at 25 evenly spaced points and calculating the deviation range.

These definitions align closely with ISO 10360-2 and provide a rigorous and standardized method to compare CMMs across different brands and countries.

Key Factors That Affect CMM Accuracy

1. Environmental Conditions: Temperature fluctuations, humidity, and vibration can all distort measurement results. Even clean air or nearby machinery can impact the CMM’s performance.
2. Machine Design and Build: The structural design—whether bridge-type, gantry, or cantilever—affects stability and stiffness. Lightweight materials and air bearings help reduce friction and increase precision.
3. Probe Systems and Calibration: The type of probe (contact vs. optical), its extensions, and how often it is calibrated all impact accuracy. Long or angled probe setups tend to reduce reliability.
4. Software Algorithms: Smart algorithms help compensate for small machine errors, align coordinate systems, and ensure clean data capture during complex measurements.
5. Operator Skill and Setup: Human error matters too. Part alignment, clamping, and probing technique all influence the final result.
6. Accuracy vs. Repeatability: What’s the Difference?When evaluating a coordinate measuring machine (CMM), two terms often come up: accuracy and repeatability. While they’re related, they measure different aspects of performance and should not be confused.

Accuracy refers to how closely a CMM’s measurement aligns with the true, actual dimension of the part. It reflects the degree of correctness in a single measurement. On the other hand, repeatability—also known as measurement consistency—describes the machine’s ability to produce the same measurement result when the same part is measured multiple times under identical conditions.

For instance, a CMM might consistently report a measurement that is 5 microns off the true value. In this case, the repeatability is high, but the accuracy is low. Conversely, if a CMM returns results that fluctuate between ±5 microns around the true value, it is relatively accurate, but not highly repeatable.

Both characteristics are essential. High accuracy ensures that you are inspecting to the correct value, while high repeatability guarantees consistent measurement results, critical for maintaining process control. Ideally, a well-calibrated CMM should offer both. When selecting or evaluating a CMM, always consider both specifications to ensure reliable quality control over time.

How to Improve CMM Accuracy

• Control the Environment: Install your CMM in a climate-controlled room with minimal vibration. Follow the manufacturer’s specified temperature range for optimal performance.
• Calibrate Regularly: Use certified artifacts like step gauges or spheres to verify both linear and probing uncertainties. Regular checks prevent drift over time.
• Choose the Right Measuring Volume: Make sure your CMM’s X, Y, and Z axes comfortably exceed the dimensions of your largest parts—ideally double their size—to allow space for fixturing and probe movement.
• Understand Your Tolerance-to-Uncertainty Ratio: A common rule of thumb is maintaining a 1:5 or 1:10 ratio—meaning your CMM’s measurement uncertainty should be five to ten times smaller than the part’s tolerance.
• Use the Right Software: Don’t underestimate your software needs. If you’re measuring complex geometries or special features, make sure your software supports it.

　Why Accuracy Matters in Real-World Applications

• 　Aerospace and Automotive: Even a micrometer of error can compromise performance or safety.
• Medical Devices: Strict tolerances ensure functionality and regulatory compliance.
• Tool & Mold Making: Accurate molds lead to accurate parts—and fewer production defects.
• Energy & Rail: Large, heavy-duty components still demand precise fit and alignment.

No matter the industry, the ability to reliably measure within spec is what separates leading manufacturers from the rest.

Conclusion

CMM accuracy isn’t just a technical spec—it’s the foundation of quality assurance in modern manufacturing. By understanding what drives accuracy and how to manage it, you can choose the right CMM and keep your inspection process sharp and reliable.

Need Expert Advice?

At PMT, we specialize in high-accuracy measuring tools tailored to your exact needs. Whether you’re setting up a new quality control lab or upgrading your current system, our experts are here to help you choose the best CMM for your application.

Contact us today to discuss your measurement challenges—we’ll help you measure up to the highest standards.

The post Understanding the Accuracy of Coordinate Measuring Machines appeared first on PMT.

What Is a Coordinate Measuring Machine?

A Coordinate Measuring Machine (CMM) is a high-precision device that captures the exact dimensions of an object by identifying its geometric coordinates—length, width, and height. Using either physical contact or optical systems, the machine maps out a part’s geometry to ensure it meets specified tolerances.

There are several structural types of CMMs, including:

• Bridge: compact and precise, ideal for moderate-sized parts
• Cantilever: open design for easier access to components
• Horizontal: Arm – suitable for elongated or asymmetrical parts
• Gantry: designed for inspecting large or heavy components

Whether using tactile probes or non-contact sensors like lasers and cameras, all CMMs serve the same fundamental purpose: capturing detailed measurement data with extreme accuracy.

What Is a Coordinate Measuring Machine Used For?

CMMs are widely employed in industries where precision is non-negotiable. They are essential in quality control processes across sectors such as aerospace, automotive, electronics, and medical device manufacturing.

Different CMM designs serve specific use cases:

• Bridge-type CMMs are well-suited for inspecting small to mid-sized components in controlled production settings.
• Cantilever CMMs offer open-sided access, making them ideal for repetitive tasks involving compact parts.
• Horizontal Arm models accommodate larger, awkwardly shaped items that don’t fit on standard tables.
• Gantry CMMs are robust enough to measure very large and heavy components without needing to reposition them.
• Regardless of the industry, CMMs ensure that every part adheres to strict dimensional requirements, helping to prevent defects and improve product consistency.

Benefits of Using Coordinate Measuring Machines

Incorporating a CMM into your production line comes with a wide range of benefits that extend beyond just accurate measurements.

1. Precision and Consistency

CMMs offer a level of repeatable accuracy that manual methods simply can’t match. Once programmed, they measure parts the same way every time, eliminating operator variability.

2. Greater Efficiency

Automated inspections reduce manual labor and save time. Complex parts that once required hours to measure can now be analyzed in minutes without compromising accuracy.

3. Adaptability

CMM systems are compatible with a range of probes and accessories. They can also integrate with modern software for real-time data analysis and reporting, allowing for greater flexibility as production needs evolve.

4. Reduced Waste

Early detection of dimensional errors helps manufacturers avoid costly rework or scrap. This not only improves the bottom line but also supports more sustainable operations.

5. Enhanced Brand Value

Delivering consistent quality builds trust. CMMs help businesses maintain high standards and a reputation for reliability.

How Does a Coordinate Measuring Machine Work?

While the specific operation may vary by model, all CMMs follow the same basic principle: the probe moves along multiple axes to collect geometric data from an object’s surface.

Here’s how the process generally works:

1. Part Preparation: The component should first stabilize at room temperature to ensure accurate measurement.
2. System Calibration: The machine must be calibrated using certified reference artifacts to confirm that measurements are within tolerance.
3. Measurement: The probe—contact or non-contact—is guided to the designated features. As it touches or scans the part, it records coordinate points.
4. Data Analysis: Measurement software processes and compares the recorded points to the CAD model or dimensional blueprint.
5. High-end systems may use laser interferometers or other advanced technologies to boost accuracy further, particularly in demanding applications.

Main Components of a Coordinate Measuring Machine

Understanding the structure of a CMM helps in selecting the right model and maintaining its performance. Key components typically include:

• Frame and Guideways: These determine the machine’s stability and movement precision.
• Probes: Devices that perform the actual measurement. They can be mechanical touch probes or optical sensors.
• Controllers: Electronics that manage axis movement and data input/output.
• Software: The interface where users plan measurements, view results, and analyze deviations.

Each part plays a crucial role in ensuring the CMM delivers accurate and efficient measurements.

Conclusion: Why CMMs Matter

As manufacturing becomes more complex and quality standards rise, coordinate measuring machines have become indispensable. They not only boost accuracy and productivity but also support smarter, data-driven production environments.

PMT provides expert metrology solutions tailored to your industry needs. Whether you’re upgrading your inspection process or exploring automated measurement for the first time, our team is ready to help.

Contact PMT today and discover how our precision tools can elevate your production quality.

The post Understanding CMMs: Essential Tools for Quality Control appeared first on PMT.

Dear Valued Partners & Industry Colleagues,??

We are delighted to announce that PMT will attend the 37th Control, the world’s leading trade fair for quality assurance from?06 to 09 May 2025, in Stuttgart, Germany. PMT will participate in the expo for the third time this year. Under the theme “Precision Manufacturing, High Reliability and Quality Assurance”, PMT will showcase a range of core products with top-notch, high-precision, and high-efficient measurement technologies at this grand event.

Messe Stuttgart

Hall 3 | Booth 3109

06. – 09. May 2025

		Portable CMM (Measuring Arm) Premier Launch of Core Products：you will explore the distinctive advantages of our latest GAMMA Portable Arm and experience the unique charm of portable measurement technology. Know in Advance
		CMM?(Coordinate Measuring Machine) Industry-Specific Solutions: PMT Bridge CMM FUTURE & PRIME will be showcased at Control, we will expected On-site technical consultations and customized service plan discussions with you. Know in Advance

The post Explore PMT’s New Gen Solutions at CONTROL 2025 appeared first on PMT.

The Importance of Measurement of Mechanical Frames and Other Components

As a core part of the chassis, the frame must satisfy the following two critical requirements:

• Assembly Integration: Provide precise installation and positioning for the engine, suspension, transmission system, etc.
• Load Assurance: Ensure that frame deformation under extreme conditions does not cause part interference.

PMT Portable CMM Facilitates the Inspection of Agricultural Machinery Frame

As a high-precision portable coordinate measuring machine, the PMT portable measuring arm has emerged as an essential device for quality control in the agricultural machinery industry. The core application scenarios of the PMT portable measuring arm are as follows:

A. 3D Dimensional Inspection of Mechanical Frame

• Portable CMM replaces traditional caliper/gauge for measurement
• Digital comparison of key dimensions (length/width/height)
• Supports standardization of assembly lines

B. Precision Measurement of GD&T

• Analysis of flatness/perpendicularity/coaxiality
• Accuracy up to 0.05mm
• Precontrol of assembly gaps

C. Quality Inspection of Welding Parts

• Evaluate the welding joint angles, ensuring the welding strength and parts’ quality.
• Effectively control the accuracy of tooling , improving the yield rate of the product.

The Measurement Process and Digital Report of PMT Portable CMM

A. Arm Calibration: Follow the standard calibration process to check the accuracy of the portable measuring arm with a calibration cone.

B. Drawing Analysis: Determine the reference datum and measurement process based on the provided drawings.

C.Data Acquisition: Obtain actual data of the parts using the portable measuring arm, ensuring measurement accuracy while eliminating external factors that may lead to deviations.

D. Data Comparison: Import the CAD model into the software for real-time data comparison, analyze frame deviations, and generate a formatted report.

E. Result Evaluation: Analyze the frame quality based on the report, manage the assembly dimensions in advance, and implement adjustments or rework as required.

Core Advantages of PMT Portable CMM

Customer Feedback: PMT Portable CMM Contributes to the Transition from Quality Challenges to Industry Leadership?

Feedback from an agricultural machinery company:

1) Efficiency Improvement:

• Annual inspection capacity increased from 800 units to 2,800 units.
• Quality Breakthrough
• Welding defect rate reduced from 17% to 2.3%, awarded the provincial-level exemplary enterprise.
• After-sales claim costs reduced by 530,000 yuan per year.

6.PMT Portable CMM Set a New Benchmark for Innovation
The PMT portable coordinate measuring machine has proven to be a breakthrough in quality control for agricultural machinery frames. With its high-precision and flexible inspection solutions, PMT portable measuring arm has driven the agricultural machinery manufacturing industry toward intelligent transformation.

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Challenges in Screw Pump Precision Manufacturing

The performance of a screw pump is significantly influenced by the manufacturing precision of its key components, particularly the dimensions and gap of the screw. Below are the primary challenges encountered in the manufacturing process of screw pumps:

1.Dimension Requirements

①The outer diameter, pitch, lead, and other dimensions of the screw must be controlled within micrometer-level tolerance (usually ±0.01 to ±0.05mm).

②For double-screw or triple-screw pumps, the meshing gap between screws must be uniform (typically between 0.05 and 0.15mm). A large gap can lead to internal leakage, while a small gap may result in jamming or wear.

2.Consequences of Poor Precision

①Fluid Leakage: A large gap or deviation can cause the fluid to flow back from the high-pressure area to the low-pressure area, then reducing volumetric efficiency.

②Efficiency Decrease: Increased internal leakage and friction lead to higher energy consumption.

③Vibration and Noise: Uneven meshing or axis deviation can cause mechanical vibrations and noise.

④Wear Intensify: Surface roughness or insufficient hardness can shorten the screw’s lifespan, especially when transporting fluid containing particles.

⑤Jamming Risk: A small gap or uncompensated thermal expansion can lead to screw lock due to temperature changes.

PMT CMM Precision Measurement Solution

Recommended Configuration

Measurement Range: 800*100*600mm, which can meet the measurement needs for most of screw pump parts.

Probe Head: MH20i, a manual articulating probe head kit, easy to operate and highly adaptable.

Stylus: D4*L20, which is suitable for measuring a variety of materials and shapes.

Measurement Angles: A0B0, A90B90, A90B-90, ensuring the accuracy of measurement results.

Measurement Process

1.Import the CAD Model: Import the CAD model into the measurement software to establish a datum for subsequent measurements.

2.Establish the Coordinate System: Use the iterative method to select the point-controlled axis and set the maximum number of iterations and iteration deviation to ensure the accuracy of the coordinate system.

3.Manual Measurement: Manually measure key points, with the software automatically iterating and optimizing to obtain the best values.

4.Section Scanning: Use the section scanning function to measure the screw’s surface profile to ensure its accuracy.

5.Construction and Evaluation: Use the construction function to extract the apex of surface and evaluate the outer/inner diameter distances to ensure the dimensions meet design requirements.

Core Advantages of PMT PRIME Coordinate Measuring Machine

The PMT PRIME Coordinate Measuring Machine stands out as the ideal choice for screw pump manufacturing industries owing to the following core advantages:

1.High-Precision Measurement: PMT CMMs meet the micrometer-level tolerance requirements of screw pumps, ensuring product quality.

2.High-Efficiency Measurement: PMT CMMs’ automated measurement processes significantly enhance inspection efficiency.

3.Professional Support: PMT CMMs provide a one-stop service from equipment selection to measurement solution design.

4.Wide Applicability: PMT CMMs are suitable for measuring a variety of precision parts, including screw pumps, semiconductor equipment, etc.

Conclusion

As a critical equipment in the fluid transport field, the performance of a screw pump is closely bound up with its manufacturing precision. The PMT PRIME CMM provides reliable measurement solutions that are widely applicable within the screw pump industry. What’s more, the PMT coordinate measuring machines have empowered enterprises to continuously improve product quality and enhance production efficiency.

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Dear friends from all sectors,

PMT will participate in the biennial INTERMOLD EXHIBITION at KINTEX, South Korea, from March 11-14, 2025. The Seoul Mold Exhibition in Korea is one of the largest and most authoritative mold events in Asia, with exhibitors from China, Japan, Dubai, India, Russia, Spain, Singapore, Italy, and more, attracting 89,910 visitors. During this event, PMT will focus on the mold industry, showcasing our new products, case studies, and innovative achievements. We look forward to joining you at this grand gathering of the mold industry!

Progress

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The Strategic Value

By combining PMT’s advanced measurement hardware, including articulated arms, coordinate measuring machines(CMMs), and laser scanner, with the powerful capabilities of the PolyWorks|Inspector? and PolyWorks|Modeler? software solutions, manufacturers will achieve unparalleled efficiency and accuracy when performing 3D metrology processes. This streamlined solution will simplify their workflow from data acquisition to in-depth analysis. It will enable businesses to address diverse measurement needs across their organizations, resulting in enhanced product quality, improved manufacturing efficiency, and optimized operational performance.

Key Benefits Include:

– Technological Synergy: Seamless integration of PMT’s high-precision hardware with PolyWorks software creates a closed-loop system for measurement, analysis, and data correction.

– Enhanced Efficiency: The auto-reporting and real-time deviation visualization of PolyWorks reduce measurement cycle by up to 40%.

– Industry Impact: The joint solution supports full-scale inspection for industries such as automotive, aerospace, defense, and energy equipment – from precision components to large-scale assemblies.

Tom Tai, Founder and CEO of PMT

“The partnership provides tremendous value for the manufacturing industries,” mentions Tom Tai, Founder and CEO of PMT. “By combining our 3D measurement technologies with PolyWorks’ capabilities, we will empower our customers to achieve higher productivity, ensuring their operations stay competitive in today’s fast-paced market.”

Abdul Aziz Saleem, Vice-President of Sales, APAC, at InnovMetric

“This collaboration with PMT reaffirms our dedication to delivering universal and innovative solutions that promote collaboration and drive manufacturing excellence,” says Abdul Aziz Saleem, Vice-President of Sales, APAC, at InnovMetric.

PMT’s Commitment to Innovation

As a national high-tech enterprise in 3D measurement industry, PMT combines European craftsmanship standards with a robust R&D team, a high-quality supply chain, and dedicated technical support. PMT continues to prioritize product excellence while driving digital and standardized management across R&D, production, and assembly processes. PMT’s ongoing investments in innovation aim to optimize operational efficiency and establish PMT as a central hub for precision industrial solutions spanning design, manufacturing, and inspection.

About InnovMetric

InnovMetric is an independent software development company that empowers manufacturers of every size to digitally transform their 3D measurement processes. InnovMetric has revolutionized 3D metrology with the introduction of point-cloud-based dimensional inspection in 2000 and the concept of a universal 3D metrology software platform in 2006. Today, with over 23,000 customers in 100 countries, and the world’s largest industrial manufacturers having adopted its PolyWorks? solutions as their standard 3D metrology software platform, InnovMetric is focusing on creating next-generation digital data and process management technologies.

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