There can't be many readers of MEW who don't have at least one 6in. digital caliper in their workshops. They are great for. reasonably accurate measurements and brilliant at quickly converting dimensions from imperial to metric and back. More recently digital readout bars, scales, which operate on the same measurement principle, have appeared in both horizontal and vertical formats. Some imported machine tools are appearing with digital scales built-in and digital conversion kits for Seig lathes are available. This self-build DRO design is available on the Internet from Scott Schumate, and several hundred DRO's have already been successfully completed worldwide. Note that this ShumaTech DRO design does not work with Mitutoyo and any other makers who may use the Digimatic data protocol.
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