I just finished cobbling my probing macros to implement a two-pass approach - I first do a "high-speed" pass to find the edge quickly, then back up a short distance, and do a second "low-speed" pass to locate it very accurately. This completes the overal probing operation more quickly, and with a better result. I'm doing the "high-speed" at 10 IPM, and the "low-speed" at 1 IPM, and getting +/-0.0001" repeatability! With a flexible probe, I hope to be able to increase the high-speed feed rate considerably.
Regards,
Ray L.