On my machine I use 500 in quad =2000 oer rev with a 5tpi screw and I can command .0001 jog moves. But since there is .003 backlash in the screw currently, I am content. I have a 500 step following error, which I am going to probably decrease as I get a better handle on the servo tuning
I would use double the encoder count on the z to keep it to same on each axis.if you use 2000 on the X and Y use, use 2000 on the Z to keep it the same.
Mariss of Gecko has switched all of his test equipment to the amt-102/103????? capacitive encoders that you can get from Digi-key and highly recomends them. They also offer adjustable resolution via dip switches on the encoders.
I am currently using the renco encoders from ebay and they are working well for me at this point.
When I order encoders for the lathe conversion soon, I will give the amt's a try.
__________________
Warning: DIY CNC may cause extreme hair loss due to you pulling your hair out. |