Re: Need help brainstorming a solution for this mill turn spindle
It is easy to achieve the resolution and RPM goals without any gymnastics using off-the-shelf hardware, but not in keeping with the additional goals of cheap and Mach3.
Delta servo drives will accept step & direction inputs up to 4 mHz and have 20 bit encoder resolution. The problem is that to get into the power range required for the spindle the cost is in the $1000+ range.
There are several free or inexpensive alternatives to Mach3.
The better system would be to use analog control of the drive, but this requires more sophistication (and cost) on the control end and of course a drive that will accept an analog input. There is no really good compromise for the overall system.
Jim Dawson
Sandy, Oregon, USA