I'm CNC'ing a new 14" lathe.
I've decided on 5/8" ballscrews, .2" pitch, and anti-backlash double nut setups.
I have a collection of servos, mostly in the 300-400 watt area, 75v, 5-7A, 2500-3000 top RPM. A lot of them Sanyo-Denki.
So I'm at the point of deciding pulley ratios, encoder count, belt size, etc.
My off hand, wild ass guess, is to use 2 to 1 reduction with 500 (2000) count encoders. I've used that before and it works.
But since in this case I must buy encoders and buy or make pulleys, I'm wondering if someone with some engineering smarts would agree with this setup.
I really have no idea what forces are involved in moving the axis of a lathe while cutting and no idea how much power or force these motors have when moving the small distances involved in most CNC turning. Also is the XL belt size sufficient.
If it makes a difference I'll be using Geckos and Mach3.
I cut steel, aluminum, mostly small parts up to 2-3" diameter, up to 8" long, but I might like to turn a pool cue, wood.
With small metal parts, big time rapids are not so important and if I decide to cut wood I could change pulleys. Also at this point it's a hobby usage machine.
Comments requested.
Ozzie