Quote Originally Posted by Tenson View Post
Lol, how can I remember what I never knew?

Actually I had suspected that might be the case given just how many pulses it needed to move the motor. Thanks for confirming it. I'll have another go tomorrow.

If my parallel port will do 45KHz is this preferable to 25KHz? It did seem to work.
Rule #1.. unless you need it, always go with the lowest usable option... 45kHz might well work, but it'll be more susceptible to noise, Windows glitches and other extraneous things... 25kHz will definitely be more robust. Missing 1 step pulse at 200steps/mm means losing .005mm - not that much but they all add up eventually... better to go with .00625mm resolution (in wood!?) and be safe...