Chotest VX8000 Series High-Speed Batch Image Dimensional Measuring System

Overview

The Chotest VX8000 Series is a high-speed, non-contact batch dimensional measurement system engineered for precision geometric metrology in high-volume manufacturing environments. It operates on the principle of telecentric imaging photogrammetry—utilizing dual-sided telecentric optics to eliminate perspective distortion and minimize Abbe error, ensuring sub-pixel measurement stability across the full field of view (300 × 200 mm). Unlike traditional coordinate measuring machines (CMMs) or manual optical comparators, the VX8000 captures a complete 2D projection of the part in a single exposure using a 20-megapixel industrial CMOS sensor. Its embedded real-time image processing engine applies sub-pixel edge detection algorithms (≤1% pixel interpolation accuracy) to extract geometric features—including points, lines, circles, arcs, and complex contours—with traceable repeatability. When equipped with the optional optical height probe, the system extends capability to 3D parameters such as step height, flatness, and surface profile—enabling comprehensive GD&T evaluation per ISO 1101 and ASME Y14.5 standards.

Key Features

• One-shot measurement: Full-field imaging eliminates sequential probing; parts may be placed freely without fixtures—automated template matching identifies orientation and initiates measurement.
• High-throughput capability: Simultaneous extraction and evaluation of up to 1,024 geometric features per image frame.
• CAD-driven automation: Direct import of DXF/DWG files; automatic alignment via feature-based registration and tolerance-aware measurement path generation.
• CNC-mode batch operation: Programmable measurement sequences for unattended multi-part inspection with auto-loading compatibility.
• Auto-focus & focus consistency: Closed-loop motorized Z-axis ensures repeatable focal plane positioning independent of operator input.
• Robust environmental insensitivity: Telecentric optical path minimizes thermal drift and vibration-induced error—calibration stability maintained over extended operational cycles.

Sample Compatibility & Compliance

The VX8000 accommodates a broad range of small-to-medium mechanical components—including PCBs, stamped connectors, precision springs, watch components, O-rings, injection-molded housings, and sapphire glass substrates—within its 7.5 kg load limit and 300 × 200 mm field. Parts with reflective, translucent, or matte surfaces are reliably measured via adjustable LED coaxial and ring lighting modes. The system complies with ISO/IEC 17025 calibration traceability requirements when used with NIST-traceable step gauges and ball plates. Measurement uncertainty budgets are documented per ISO/TS 22514-7 for SPC integration. Software audit trails, electronic signatures, and data immutability support compliance with FDA 21 CFR Part 11 and EU Annex 11 for regulated manufacturing environments.

Software & Data Management

The proprietary Chotest Metrology Suite provides an intuitive, icon-driven interface with role-based access control. It includes 80+ built-in geometric extraction tools—such as R-corner analysis, pitch measurement (linear/circular), spring pitch & coil count, and contour comparison against reference profiles. GD&T evaluation covers straightness, roundness, flatness, position, perpendicularity, concentricity, and symmetry per ISO 1101. Statistical process control modules generate X-bar/R charts, capability indices (Cp/Cpk), and automated PDF/Excel reports with customizable templates. Raw image archives, measurement logs, and version-controlled inspection programs are stored in encrypted SQLite databases with configurable retention policies. Remote data export supports OPC UA, Modbus TCP, and RESTful API endpoints for MES/SCADA integration.

Applications

The VX8000 is deployed extensively in Tier-1 electronics contract manufacturing for rapid verification of PCB fiducials, solder paste stencil apertures, and connector pin arrays. Automotive suppliers use it for 100% inline inspection of brake caliper mounting holes and ABS sensor rings. Medical device manufacturers rely on its repeatability for measuring stainless-steel surgical blade dimensions and polymer catheter hub geometries. In precision machining, it validates gear tooth profiles, thread lead angles, and micro-fluidic channel widths—reducing reliance on tactile CMMs for first-article and periodic process audits. Its compact footprint (531 × 503 × 731 mm) and low power consumption make it suitable for cleanroom deployment and shop-floor integration.

FAQ

Does the VX8000 require periodic recalibration?
Yes—recommended annually using certified artifact sets (e.g., NIST-traceable step gauges, ceramic ball plates); onboard self-diagnostic routines verify optical alignment and focus stability daily.
Can the system measure transparent or glossy parts?
Yes—via programmable multi-angle LED illumination and polarization filters to suppress specular reflection artifacts.
Is CAD model-based measurement supported for GD&T?
Yes—imported STEP or IGES models enable datum reference frame (DRF) definition and true-position evaluation relative to nominal geometry.
What level of measurement uncertainty can be expected?
Typical expanded uncertainty (k=2) is ±(1.8 + L/200) µm for length measurements within the high-accuracy zone (230 × 130 mm), verified per ISO 15530-3.
Is remote software update and technical support available?
Yes—secure remote desktop access and over-the-air firmware updates are supported under signed maintenance agreements.