RE: [CAD_CAM_EDM_DRO] Power supplies sizing

If these are stepper motors, the winding current is drawn whether or not the
motors are actually turning. You may find that some controllers reduce the
winding current when the motors are not turning, but none (to my knowledge)
reduce it to zero. So, unless you know that all of the motors will not be
turning at the same time and that the controllers reduce current for static
motors, you should have a power supply rated for AT LEAST the full fifteen
amps. I'd probably get a power supply with some reserve capacity - say
twenty to twenty-five amps.

-- Carol & Jerry Jankura
Strongsville, Ohio
So many toys, so little time



-----Original Message-----
From: wanliker@... [mailto:wanliker@...]
Sent: Thursday, April 19, 2001 1:25 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Power supplies sizing


If I am using three motors rated at 5 amps, in the X.Y, and Z axis. Do I
have to have a power supply rated at a full 15 amps, or can it be a
percentage of that? I assume that most of the time, all three will not be
running at full load, am I correct on this?
Small home machine, not commercial duty.
bill
List Mom