As intelligent manufacturing and quality control continue to advance, precision dimensional measurement plays an increasingly critical role in modern industrial production. In sectors such as PCB, copper-clad laminate, flat glass, LCD modules, die cutting, and insulating materials, the demand for micron-level accuracy in dimensions, tolerances, and flatness is growing rapidly.

Traditional manual tools and basic video measuring systems often fail to meet the dual requirements of high accuracy and efficiency. In contrast, this gantry-type large-travel fully automatic video measuring machine stands out as a preferred non-contact measurement solution, thanks to its advanced structural design, high-precision motion system, intelligent vision processing, and flexible software capabilities.

1. Gantry-Style Structure: Stable Support for High-Precision Measurement
This series of video measuring machines adopts a gantry (bridge-type) structure, which offers symmetrical mechanics, balanced center of gravity, and superior structural rigidity. Unlike cantilevered or one-sided support structures, the gantry design ensures no deformation during large-travel movements, maintaining stability and repeatability throughout the entire measuring range.

This design is widely used in high-end metrology systems such as coordinate measuring machines (CMMs) and laser measurement platforms, where long-term structural stability and mechanical symmetry are key to maintaining consistent accuracy over time.

2. Air Bearing & Fully Air-Floating Guideway System: Contact-Free, High-Sensitivity Motion
Equipped with preloaded air bearings and a fully air-floating guideway system, this machine uses micro-porous nozzles to release compressed air, forming a thin air film that suspends the stage above the guideway — enabling true non-contact linear motion.

Compared to traditional mechanical linear guides, air-floating systems offer significant advantages:

Zero mechanical wear, ensuring long-lasting accuracy;

No backlash or return error, resulting in ultra-smooth and precise motion;

Fast acceleration and smooth start/stop, ideal for large-surface scanning and frequent movement.

For example, in the flat glass industry, edge contours, holes, and thickness need to be measured rapidly and continuously. Traditional systems may suffer from vibrations and position errors at high speed, while this air-floating design ensures vibration-free and stable motion, guaranteeing clear image capture and accurate data.

3. Dual-Loop Servo System: Accurate Motion Control
The X, Y, and Z axes are all powered by high-precision servo motors combined with a dual closed-loop control system — position loop and velocity loop. Through encoders and linear scales, real-time feedback enables instant correction of motion errors, ensuring precise and repeatable movements.

This advanced control system, commonly used in aerospace and semiconductor fields, significantly improves positioning accuracy and response speed. For instance, in die measurement, tracking curved or irregular outlines requires high dynamic responsiveness and repeatability. A conventional stepper motor system may introduce overshoot or deviation, but dual-loop servo control handles such demands with ease.

4. Intelligent Vision System: Auto-Focus + Auto-Zoom + No Magnification Calibration Required
The Z-axis is equipped with an automatic focusing module, which dynamically adjusts the focal point based on surface reflectivity or height variations of the sample. In combination with an auto-zoom lens, the system can switch magnification levels seamlessly — without the need for manual calibration after zooming, thanks to its built-in magnification compensation algorithm.

This is especially useful when measuring multi-layer components such as LCD modules, where the system must transition between glass layers, adhesive layers, and backlight structures quickly and precisely.

5. Optional Contact Probe: Extended 3D Measurement Capabilities
For more complex applications, this machine can be equipped with a RENISHAW contact probe system (UK origin) and comes with ∅1 mm and ∅2 mm probes to enable 3D coordinate measurement — including height, depth, and flatness evaluation.

It complements the non-contact video system and is particularly suitable for:

Step height measurements of mechanical parts;

Groove depth measurement in precision molds;

Flatness detection of multi-material assemblies.

For example, in copper-clad laminate (CCL) manufacturing, localized thickness differences caused by uneven copper distribution can be quickly identified using the contact probe, allowing for accurate flatness mapping and analysis.

6. Software Platform: Full Control Over Automated Measurement Process
The built-in QuickMeasuring software offers a powerful, intuitive interface that manages the entire inspection workflow — from image capture and automatic edge detection to geometric calculations, CAD file comparison, and report generation.

Key features include:

DXF file import for automatic contour matching;

Adaptive edge recognition for varying materials and lighting conditions;

Batch programming and execution for high-throughput measurement;

Built-in SPC analysis for statistical process control and traceability.

This makes it an ideal tool for modern digital quality systems and smart manufacturing lines.

7. Typical Applications
Industry Application Examples
PCB & Electronics Pad location, through-hole dimension, track spacing
LCD Modules Outer dimension, hole position, alignment accuracy
Flat Glass Frame size, edge chamfer angle
Insulating Parts Slot dimensions, alignment holes, cut-out inspection
Die & Stamping Profile curves, symmetry, flatness of die-cut parts

8. Conclusion: A Trusted Tool for High-Efficiency Industrial Metrology
The evolution of video measurement is moving from basic 2D inspection toward advanced 3D dimensional evaluation and from semi-automatic workflows toward fully automated smart measurement systems.

This gantry-type fully automatic video measuring machine offers unparalleled stability, intelligent control, modular design, and 3D compatibility — making it a comprehensive, reliable, and highly efficient metrology solution for today’s manufacturing environment.

In a world increasingly driven by automation and precision, investing in high-performance video measurement technology is an investment in quality, efficiency, and long-term competitiveness.

Let us help you build your precision measurement capability — contact us today for customized configurations and technical consultation.