Hi, I have a questech cnc educational mill I retrofitted with PMDX 122 breakout board, PMDX 150 driver boards. The mill is a sherline with oriental PK 266-e2.0a 2-phase stepper motors w/1.8 deg. step. I have read quite a bit of the past posts regarding motor tuning and config. however, I am not clear whether or not I should be using the sherline mode. I am a little confused as to what it's function is. I have finally got these motors to work by jogging. I configured the boards for 1/8 step, which if I understand this correctly, computes to 32000 steps per. with a .050" worm. (200X20X8)
I set the steps per to 28000 and let mach fig. it for me from there and it computed a figure around 31950. It seems really accurate.
1. Do I leave what mach did or do I change it to 32000 even?
2. I did this tuning with the sherline mode activated, was this the right thing to do?
3. What is the best practical, reliable and accurate setting for me to use as a beginner?
4. I set my backlash for Y and seems to come back right on the money however, after finally getting X accurate, it wanted to go past my "zero" .001" each time. Y did not do that. Is this normal and/or can it be fixed? (Even though it is going past my "zero" check, it is also accounting for it, which is right)
Thanks for any help! Colin