CNC Automatic Video Metrology Systems for Rapid Repetitive Measurements

This system is ideal for applications where repeat measurements are required on a run of parts with the speed and accuracy of non-contact video edge detection.

Starrett Kinemetric Engineering, Inc. (Laguna Hills, CA), a subsidiary of the L.S. Starrett Company (Athol, MA), announces its new AVR Series of CNC automatic video metrology systems that are designed for applications where repeat measurements are required on a run of parts with the speed and accuracy of non-contact video edge detection (VED).

Two sizes are offered: Model AVR200 with 8 in x 4 in x 8 in of XYZ travel and Model AVR300 with 12 in x 8 in x 8 in of XYZ travel. The AVR Series features a granite base for stability and precision and recirculating ball linear guides for smooth stage motion. The level of the stage glass can be adjusted mechanically, as well as in software.

Computer-controlled Quadrant LED ring lighting, LED sub-stage lighting, and optional through-the-lens LED lighting meets the most challenging illumination requirements. The AVR is coupled with a 21.5 in all-in-one touch screen PC that runs MetLogix M3 software under Windows® 7 Professional. All electronics other than those in the PC are housed in the Z-column, avoiding external components and ensuring a clean system installation with a minimal footprint.

The basic M3 metrology software supports 3-axis measurements and 2D geometrical constructs (such as points, lines, angles, rectangles and slots) and corrections for level, skew and datum origin. Touch screen functionality with a pinch, swipe and a touch provides intuitive operation for all users.

With the M3 DXF/FOV option pack, DXF CAD files can be imported over a network, DXF drawings can be overlaid on the live video image, and error whiskers can be displayed for portions of the live video that do not fall within tolerance limits. High-speed measurements can be made within the field-of-view (FOV) of the camera optics and can be seamlessly integrated with X-Y encoder readings for larger parts.

With the M3 CNC option, closed loop control signals for X, Y and Z motion and optical zoom and illumination are generated for repetitive measurements, boosting productivity.

The AVR Series systems include a digital video camera with either 6.5:1 or 12:1 motorized zoom optics or a choice of six telecentric lenses. The telecentric lenses provide micron-level resolution and optical distortion down to 0.001% for accurate FOV measurements. Such measurements can encompass a small part up to 2.00” x 1.50” or a feature of a larger part.

“Our AVR Series represents the next step in the evolution of CNC vision metrology systems with state-of-the-art hardware and software for unmatched flexibility, accuracy and ease of use,” stated Mark Arenal, the general manager of Starrett Kinemetric Engineering.

Based in Laguna Hills, Starrett Kinemetric Engineering is known for its design and manufacture of standard and custom precision video-based and optical comparator measurement systems. The company also produces precision motion devices, X-Y tables, linear stages, and metrology platforms. All products are backed by application analysis, training and calibration services. www.starrett.com/metrology/metrology-products/metrology-equipment‎