Problem resolved on my machine. Never could get S True to read correctly using ver .038. RPM readout was not stable even though spindle rpm was constant as verified by tach. Understand Art has been working on drivers for the faster computers and mind just did not like the new drivers (speed on mine is 1.7 Ghz). Anyway, reinstalled .032 and everything works like a charm. Thanks to all who tried to help solve the problem.