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27-03-2017 #1
Mini Mill Conversion - most appropriate stepper drive choice
A friend and myself are separately working on CNC conversions of mini mills. Mine is an old Sieg X2, where I intend to go cheap and use trapezoidal screws and Delrin nuts - kind of as an experiment to see what's possible. My friend's is a bit classier - one of the larger cast iron Proxxon mills, where he's using decent ballscrews and hence expects decent results!
We are both intending to use 3Nm steppers - which we presume from reading around the forum seem appropriate. What we would like some input on, is the best choice of stepper drives to use.
I know the AM882 is the drive of choice for a router, where you would be wanting to run the motors at 68v to achieve higher speed operation. My understanding however is that for a small mill, you're really not looking for such axis speed, and hence could quite happily run the motors at a lower voltage. This in turn allows lower cost stepper drives and power supply, as well as reducing heating effects in the motors.
Is this a reasonable argument? Or not? And if so, what are the "preferred" stepper drives and supply voltages for this type of application?
Thanks in advance for any suggestions!
Cheers
GraemeLast edited by GND; 28-03-2017 at 12:05 PM.
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