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Edge Finder (Steel Type) Used in the spindle of a machine such as a mill to accurately locate the centre of a workpiece.
1. Equip the shank of the edge finder to a drill chuck or milling chuck; manually shift the probe slightly off its centre and let it rotate eccentrically. 2. Gently move the rotating edge finder closer and closer to the measured workpiece; when contact is established, eccentricity gets smaller. The probe (tip) then stops rotating. 3. Gently shift the probe again to make contact with the workpiece; the probe then will slide along the surface of the workpiece. This position is the reference position distanced 5mm away from the probe diameter.