The document describes how to use an edge finder tool to precisely locate the edge of a workpiece in relation to the spindle center. The edge finder tip is slowly fed against the rotating workpiece until it becomes centered in its shank and abruptly jumps sideways, indicating the edge is located. The user then zeros the readout, raises the spindle half the diameter of the tip, and zeros again to accurately measure the edge position.

1. The edge finder is a precision positioning tool that will locate the edge of the work in
relation to centre of the spindle to within 0.0002"(0.005 mm) accuracy.
A) With spindle rotating and with edge finder tip as shown,
slowly feed tip of tool against work.
B) The edge finder tip will gradually become centered with its shank.
C) When the tip becomes exactly centered, it will abruptly jump sideways.
When this occurs, stop table movement immediately and press ZERO on the digital read out.
Then raise the spindle and move over half of the diameter of the tip of the edge finder and press
ZERO again on the digital readout.