HIYA Mikey , First closed loop NEVER work worth a hoot even with teh LPT and I dought it even works at all with a ESS. What you see is a linear config error. The voltage output is NOT linear with the RPM called. THAT is a function of teh ESS to control that probably a ESS setup problem with teh spindle control.
Normally MACh3 does NOT attempt to correct ANY spindle speed. You just have what the spindle is doing and that is it. IF it boggs down it just boggs down UNLESS your spindle speed controller itself can do Closed loop control and MOST don't unless it is a SERVO spindle.
IF you were useing an LPT I could show you how to correct the linearity problem BUT I don't know squat about the ESS's spindle output control.
BUT there is probably a manual out there somewhere that may have the answer
?
(;-) TP
(;-) TP