Quill scale for the Bridgeport this is a glass linear scale 5 micron resolution and is available with summing adaptor so you can couple the Quill scale with your knee scale. The summing adaptor will add and subtract the 2 scales to always give you an absolute position of the tool in the spindle.
This same scale is also available to be interfaced into any other make of Digital readout (Not Newall) to allow you to upgrade a DRO system that is already in place - of course you will need to already have a 3 axis console in place.
How the Quill summing system works
About GT Machine Parts
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