The portable measuring arm, or portable arm coordinate measuring machine (CMM) has become an important quality control tool at many manufacturing companies. With the flexibility to be used nearly anywhere on a manufacturing floor, from in-process checks to large-scale assembly to inside machine tools, measuring arms have the capability to deliver real-time feedback right at the point of production. The first-time buyer, and even repeat buyers, may be overwhelmed by the variety of features, accessories, and capabilities available. Even those knowledgeable about CMM technology may find the conventions of measuring arms to be unfamiliar and confusing. It is the purpose of this article to provide insights about what to consider when sourcing a portable arm CMM, and specific things to look for as your organization makes this investment in quality and productivity.
CIMCORE ARM with Integrated 3D Laser Scanner
The CIMCORE ARM is available with a fully integrated and certified laser scanner system with seven rotation axes. The laser scanner is a part of the arm’s wrist. Together with the standard probe, this system is an all-purpose metrology tool for a multitude of applications. Changing from scanning to probing and vice versa is possible at any moment. 3D digitizing, 3D modelling, point cloud inspection, reverse engineering, rapid prototyping or copy milling are the most frequent laser scanner applications and with the CIMCORE ARM, these tasks go mobile. The laser scanner is tuned for a vast variety of materials without compromise in accuracy. This low-weight laser scanner solution comes as a cost-efficient package. No additional cable or controller between the laser scanner and the portable measuring arm permits the CIMCORE ARM’s infinite rotation of the main movement axis. Thanks to the perfect balance, the CIMCORE ARM with the integrated scanner can be operated with one hand.
The Point Repeatability
Test is the reference test to determine measurement arm repeatability with ball probe. The cone is in front of the machine. Points are measured from multiple approach directions. The average point and the deviation of each point to the average center are calculated. The result is the maximum range divided by two.
The Volumetric Accuracy
Test most accurately represents the reasonable expectations for machine performance in practical measuring applications since it involves measuring a certified length standard many times in several locations and orientations and compares the resultant measurements to the actual length. The Volumetric Length Accuracy Test is the most appropriate test for determining machine accuracy and repeatability. The result is the maximum deviation of the measuring distance less the theoretical length.
The Scanning System Accuracy
Test most accurately represents the reasonable expectations for machine performance in practical measuring applications while using the laser scanning method. The test consists of measuring a matte grey sphere with 5 different arm articulations. In each articulation of the arm the sphere is scanned from 5 different directions such that the majority of the sphere is scanned. The result is the maximum 3D center to center distance of the 5 spheres.
FaroArm® – FARO offers the best-selling measurement arm
The FaroArm® is a portable coordinate measuring machine (CMM) that allows manufacturers easy verification of product quality by performing 3D inspections, tool certifications, CAD comparison, dimensional analysis, reverse engineering, and more. The all-new FARO Edge is the most advanced, state-of-the-art FaroArm ever produced. With the , the addition of the FARO Laser Line Probe to the FaroArm adds unparalleled non-contact 3D scanning capabilities for detailed measurement of surface form, making the ScanArm the perfect combination of a contact and non-contact portable CMM.
Non-Contact Measurement with High Performance Scanning Technology
The ScanArm HD is the latest advancement in FaroArm product line and provides point cloud capture with rapid speed, superior resolution and high accuracy — all in a compact, lightweight and easy-to-use system. New functionalities allow users to seamlessly scan across diverse surface materials regardless of contrast, reflectivity or part complexity without any special coatings or target placement. The FARO Edge ScanArm HD combines the convenience of a FaroArm with the power of a Laser Line Probe creating the world’s most affordable, high performance contact/non-contact portable measurement system.
High Definition Data
Intricate components can be captured in fine detail as a result of the 2,000 actual points per scan line and noise reduction technology.
Rapid Scanning Speed
The extra wide scan stripe and fast frame rate boosts productivity by increasing coverage and reducing scanning time.
Intuitive On-Board Measurement System
- Built-in touchscreen computer
- Laptop-free basic measurements
- Personalized settings
- Quick Tools
- On-board diagnostics
Smart Multi-Function Handle Port
- Seamless and interchangeable accessory integration
- Quick-change handle & expandable capability
Smart Connectivity
- Bluetooth®, Wi-Fi®, USB, and Ethernet ready
- Multiple device management through enhanced networking
Smart Sensor Technology
- LED range finder and cross hair feature provides real-time scanning feedback
- Stress sensor warn against excessive external loads
- Temperature sensors correct for thermal changes
- Tilt/motion sensors detect possible setup problems
