QVI optical comparator charts are produced from CAD generated masters scribed on a high precision plotter for uniform line weight and accurate location. Replacement screens are made of glass, while overscreen charts are made of dimensionally stable plastic. Plastic charts are produced with our exclusive Permaline sealed image process. The chart lines are sealed into the plastic for unmatched durability and long life.
QVI centerline screens are essential accessories for any optical comparator or profile projector. Four styles are offered: C-1 features 90° centerlines only, C-2 adds 30° lines in each quadrant, C-3 adds 30° and 45° lines in one quadrant, and C-4 adds 30° and 45° lines in two adjacent quadrants.
360° Radius Charts
360° radius charts are designed for multiple purpose use. Each chart includes 360° radius lines (with single magnification scale), 90° centerlines, and 30° and 45° lines in one quadrant.
Radius and Angle Charts
Radius and angle charts combine 180° radius lines (multiple magnification), 90° centerlines, and 30° and 45° lines in each quadrant. Every fifth line is bold and identified for direct reading.
0.001" Radius Charts
0.001" radius charts allow easy checking of radii. Each chart has 90° centerlines and 90° radius lines (with single magnification scale) incremented 0.001" in adjacent quadrants.
Multiple Magnification Radius Charts
360° multiple magnification radius charts include 360° radius (multi-mag), 90° centerlines, and 30° and 45° lines in each quadrant. Every fifth line is bold and identified for direct reading.
Grid charts turn any optical comparator into a coordinate measuring instrument. By making simultaneous horizontal and vertical measurements, it's a snap to inspect contours, shoulder lengths, diameters, hole locations, and tapers. For ease of use, every fifth line is bold and identified for direct reading.
Toolroom charts simplify inspection and save money. This unique chart combines all the features of radius, grid, and angle charts in one convenient arrangement. With a toolroom chart, you'll handle almost any measuring application. Mounting one in the rotary screen ring of your optical comparator allows you to check parts in any orientation on the screen. For ease of use, every fifth line is bold and identified for direct reading.
Download the Charts and Fixtures Catalog for more information.