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]]>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.
CMM accuracy measures how closely the machine’s results match the true dimensions of a part. It’s commonly evaluated by two key indicators:
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:
These definitions align closely with ISO 10360-2 and provide a rigorous and standardized method to compare CMMs across different brands and countries.
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.
No matter the industry, the ability to reliably measure within spec is what separates leading manufacturers from the rest.
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.
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.
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]]>The post Understanding CMMs: Essential Tools for Quality Control appeared first on PMT.
]]>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:
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.
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:
Incorporating a CMM into your production line comes with a wide range of benefits that extend beyond just accurate measurements.
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.
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:
Understanding the structure of a CMM helps in selecting the right model and maintaining its performance. Key components typically include:
Each part plays a crucial role in ensuring the CMM delivers accurate and efficient measurements.
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.
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]]>The post Explore PMT’s New Gen Solutions at CONTROL 2025 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
06. – 09. May 2025
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Exhibition Highlights |
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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. |
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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.
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]]>The post Case Study on PCMM | PMT Portable CMM Assists in Improving Mechanical Frame Inspection appeared first on PMT.
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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:
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
B. Precision Measurement of GD&T
C. Quality Inspection of Welding Parts
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:
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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]]>The post PMT Portable Measuring Arm Facilitates Forklift Inspection appeared first on PMT.
]]>In the production process of large forklift parts, the challenge of quality inspection has always been a key factor constraining production efficiency and quality improvement. Especially in the processing of core parts such as axle case, traditional measurement methods have limited production efficiency, difficult quality control and high costs due to problems such as large size and heavy weight of parts and difficulty in accurately locating key parts. Especially in the flexible automated production mode, the limitations of traditional measurement tools are more prominent, creating an urgent need for companies to overcome these traditional measurement bottlenecks.
To address these challenges, a coordinate measuring arm combining high precision, flexibility, and intelligence – PMT Portable Coordinate Measuring Machine – has become a key breakthrough for the industry. With the high precision, multi-function and easy operation of the CMM arm, PMT portable measuring arm provides Hangcha Group with efficient and accurate measurement solutions. Meanwhile, the PMT arm CMM machine can adapt to various types of workpieces without the need for frequent tool changes or measurement parameter adjustments, significantly improving production efficiency while enhancing measurement accuracy with the help of portable CMM.
At Hangcha Group’s production site, the technical team of Hangcha Group highly recognized the precise measurement capability of the PMT portable coordinate measuring machine. They noted that the PMT portable measuring arm not only significantly improved measurement efficiency and accuracy but also effectively reduced production costs. At the same time, the targeted technical exchanges and support provided by PMT engineers greatly enhanced Hangcha Group’s confidence and capability in controlling workpiece dimensions. Furthermore, PMT’s after-sales team further ensured the stable operation and continuous improvement of the portable measuring arm system with their efficient and professional service.
Through years of development and challenges, measurement technology marked by portable CMM machine has been evolving from a simple quality inspection tool into a crucial pillar for supporting the intelligent transformation of enterprises. As a well-known manufacturer of arm type CMM, PMT will continue to uphold the spirit of technological innovation, assisting enterprises in achieving intelligent transformation and enhancing global competitiveness with its star CMM measuring arm. PMT aims to provide smarter, more efficient, and more precise measurement solutions with its metrology arm for the industrial vehicle manufacturing industry, becoming an indispensable “Smart Partner” in this field.
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]]>The post Exhibition Events|INTERMOLD KOREA2025 appeared first on PMT.
]]>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!
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]]>The post PMT Establishes Global Strategic Partnership with InnovMetric appeared first on PMT.
]]>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.
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.
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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]]>The post PMT Portable Measuring Arm Provides Guarantees for the Quality of Sheet Metal Square Pipe Fittings appeared first on PMT.
]]>1) Measurement Principle
When measuring square tubing, the operator needs to hold the portable arm and touch the probe on the surface of the measured target. By rotating and moving the elbow, the arm is able to collect coordinate data from different positions on the tubing. Then, the data will be transmitted to the control system and processed and analyzed by the software. Finally we get the required dimensions, shapes, and positions of the tubing.
2) Measurement Steps
① Compare the workpiece with the drawings. Analyze the drawing requirements and relations between each dimension, and identify the features on the workpiece. Use the measuring arm to detect the relevant feature elements.
② Import the CAD model. After importing the CAD model, the PMT engineer will delete unnecessary components (such as cylinders, connecting blocks, valve islands, brackets, screws, etc.) according to the requirements of the CAD model, and retain the modules that need to be inspected.
③ Establish the coordinate system (usually using methods such as the center point of the plane axis, iteration, etc.). Align the measured data with the nominal data to establish the positional relationship between the measuring arm and the workpiece. This will facilitate the next steps.
Contact measurement with the portable measuring arm: The engineer will collect data by touching the surface of the workpiece with the ball probe of the arm and use the least squares method to best-fit the measured data parameters.
Based on the technical requirements, we can analyze the position of holes and surfaces. In the measurement system, the shape deviations, position and other parameters of the measured object can be evaluated, and the key dimensions can be marked.
Generate a report based on the measurement results. The report should include basic information about the measured object, parameters, results, error analysis, and other relevant content.
Send the measurement results to relevant departments so the company can facilitate subsequent production, processing, and quality control activities.
Since sheet metal components are often mass-produced, it is common to conduct random sampling or batch inspection of the same product. In such cases, the creation of new workpiece command in the software can be used for repeated inspections, with no need for data editing or processing, greatly improving measurement efficiency.
① High Precision
The PMT portable arm employs advanced angle encoder technology, enabling high-precision measurements that meet the requirements of most industrial production and quality inspection processes.
② High Efficiency
Compared to traditional methods, the PMT measuring arm is easy to install and calibrate. Operators can quickly learn how to use the machine, an process and analyze the data through the software, reducing the workload associated with manual calculations and data handling, thereby increasing work efficiency.
③ Strong Flexibility
The PMT portable measuring arm can rotate and move flexibly, adapting to the measurement needs of square tubing of various shapes and sizes. It can also be used in complex environments.
In industries such as mechanical manufacturing, automotive manufacturing, and aerospace, square tubing is widely used in the production of various structural components. For large square tubing structures, such as steel structures in construction or bridge structures, the PMT measuring arm is able to perform rapid on-site inspection to ensure construction quality control.
During the research and development of square tubing, the PMT portable arm can provide precise measurements of samples to optimize the design process. It can also compare different schemes and select the optimal design for customers.
The PMT portable measuring arm is the ideal tool for measuring sheet metal square tubing. With its high precision, high efficiency, and strong adaptability, it meets the high demands of industrial manufacturing, provides reliable quality assurance, and plays an important role in the research and development stage, showing great value across different industries.
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]]>The post A Powerful Tool to Help Deliver Improved Quality in the Automotive Industry appeared first on PMT.
]]>Price war has become the norm since the rapid development of the market will inevitably bring fierce competition. However, the market has proved that car companies have been raising their competitiveness, and the trend has shifted from low-priced competition to applications of cutting-edge technologies, exceptional performance of products, and branding development. This will help reshape the industry.
3D measurement technology has been playing an increasingly important role in modern manufacturing. It can provide high-precision measurements for different sizes and shapes, which is of great significance for improving product quality and production efficiency. As an advanced 3D geometric measurement system, PMT ALPHA has a built-in counterbalance system which is specially designed for on-site inspection. The structure of the equipment is simple and balanced, thanks to its perfect equal arm length design, which delivers an outstanding arm-operating experience. PMT portable arm is compatible with many measurement software and widely used in manufacturing industries as follows.
In scanning clay sculptures or similar kinds, the Alpha M ScanArm can quickly model with its collected data without pasting marking points, which greatly shortens the design cycle and thus improves efficiency. Here is an example from a car manufacturer who used reverse engineering to do 3D modeling of a prototype car during the process of creating a new model. It all only took two weeks, saving about 40 percent of the time compared with traditional methods.
Use ALPHA Arm to do regular inspection of molds and production tools, and to analyze the wear condition so repairs or replacement could be made. For example, the customer used the PMT Alpha arm on their auto parts production line to inspect the mold on a regular basis. They detected and fixed a slight wear problem in time, helping prevent production delays and cost increases caused by mold damage.
Using ALPHA Arm to measure 3D coordinates will help ensure the accuracy of auto parts. We can see deviations between the actual workpiece and the CAD model by comparing the measured data with the nominal data. For example, in a process of quality control of key components, the operator used the ALPHA arm to detect dimensional deviations in a batch of components, and feedback was immediately sent to the production department. It effectively helped prevent the customer from producing batches of substandard products.
We can make adjustments to the assembly position according to the obtained accurate data of the auto parts so as to make sure the accuracy and quality of the whole process. For example, on the assembly line of a high-end model, the application of the PMT ALPHA arm has improved the assembly accuracy by 20 percent, significantly enhancing the quality of the vehicle and customer satisfaction.
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]]>The post PMT is Committed to Providing Comprehensive 3D Measurement Solutions to Boost China’s Aviation Industry appeared first on PMT.
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Chengdu, as the pioneering pilot center for the successful development and commercial operation of C919, has now become one of the main cities driving the advancement of China’s aviation industry. Therefore, as a new benchmark in the precision 3D measurement technology, PMT has been actively participated in this summit and conducted in-depth exchanges with many representatives and relevant aviation departments on site. These interactions highlighted PMT’s development and achievements over the years and showcased its flagship products, including the portable measuring arm and coordinate measuring machine. After demonstrating the excellent performance of portable measuring arm on site, numerous visitors have expressed significant interest in PMT’s products, including the portable measuring arm and coordinate measuring machine, and scheduled demonstrations as well as discussions for potential collaboration.
With the theme of this summit, ” Innovative Development, Efficiency Improvement “, PMT will seize this opportunity to continuously provide more comprehensive 3D measurement solutions, aiming to empower measurement and test in the aviation industry, thereby boosting the thriving development of domestic airliners.
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]]>The post PMT South China Solution Center Unveils Strategic Upgrade to Empower Regional Manufacturing appeared first on PMT.
]]>The launch of the center marks a pivotal step in PMT’s commitment to enhancing regional service capabilities and expanding technological applications. It will deliver efficient, precise, and localized technical support to clients across South China.
Focusing on Needs, Empowering with Technology
Centered on “On-site technical demonstrations”, the South China Solution Center is equipped with cutting-edge tools such as CMM machine, portable measuring arm, and a team of expert engineers. These resources enable rapid responses to measurement demands in automotive manufacturing, precision electronics, mold development, and other industries. Through hands-on guidance and real-time problem-solving, PMT aims to help clients experience firsthand how high-precision measurement technologies optimize production efficiency while delivering customized solutions tailored to regional needs.
Collaborative Innovation, Elevated Services
Leveraging the National Mold Center’s industry-leading expertise and PMT’s more than 20 years of technical prowess in precision measurement, the partnership will drive collaborative initiatives such as technical training, process optimization, and R&D projects to accelerate South China’s transition toward intelligent manufacturing.
The center has now opened for visits and technical exchanges, offering clients seamless access to PMT’s expertise.
Moving forward, PMT will continue to innovate and strengthen synergies with regional industry partners. By providing end-to-end services spanning measurement equipment, technical consulting, and talent development, the South China Solution Center will serve as a cornerstone for advancing high-quality growth in China’s measurement industry.
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]]>The post Control 2024|PMT Insight Into Pioneering Innovations appeared first on PMT.
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About PMT&Control
Control is a global exhibition of high-end precision measurement instruments, and this is the second collaboration between PMT and Control. Its ALPHA 6-axis measuring arm, laser scan arm, Bridge CMM and accessories displayed at the exhibition provide visitors with different perspectives, values, and technical support across various aspects.
It has drawn significant attention from visitors to PMT Bridege CMM, Paolo, European Director of PMT has been showcasing the outstanding performance of PMT products.
Paul and Günther, PMT’s British and Austrian distributor proactively come forward to support PMT and engage in in-depth technical exchanges with local customers.
Continuously Looking Forward to Win-win Cooperation
During the fair, many global measuring instrument suppliers, software developers, integrators, and renowned product managers visited the PMT booth to acquire an in-depth understanding of the development history, core technologies, application achievements, and future development plans of PMT and its products. Following pleasant conversations with PMT General Manager Tom Tai and Assistant to General Manager Susan Gu, they actively pursued further opportunities for collaboration.
It has attracted much attention of partners and potential customers from more than 20 countries and regions including Germany, Britain, France, the United States, Italy, Austria, Portugal, Spain, South Korea, India, and the Philippines, who showed keen interest on PMT’s products.
The remarkable progress achieved by PMT can be attributed to its unwavering focus on establishing a solid foundation for product quality and unwavering belief in R&D and years of accumulated deliberation and refinement. Undoubtedly, the development of overseas exhibitions, strategic industry positioning, and the cultivation of exceptional talents are instrumental in achieving deep global business integration, and PMT will also remain dedicated to furthering internationalization efforts and co-creating enterprises’ global development.
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