RE: [CAD_CAM_EDM_DRO] Re: 24V Power Supply Sources?

"Spam Away" wrote:

> How many amps do we really need for a small micro mill type application?

Here's a copy of a posting I made in the Xylotex group back in October:

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I have three machines so far: a Sherline mill, a Sherline lathe, and a
Techno-Isel gantry table. I set the Xylotex board up for each and
monitored the current of the 24V input to the board, both with the motors
still, and running all three axes at the maximum rapid speed that currently
works with each machine (no cutting load involved, but I think the main
load is frictional anyway on these little machines due to the small cuts
used.)

1. Sherline mill. Three SST257D3201 motors, 3.2V, 2.0A (the ones Sherline
sells). Leadscrews 20tpi--32,000 steps/inch in 1/8 stepping mode. Drive
set at 2.0A. 1.43A input with motors still, 2.83A on a 3-axis 20ipm move.

2. Sherline lathe. Two Vexta PH268-21 motors, 5.4V, 1.5A. Leadscrews
20tpi--32,000 steps/inch in 1/8 stepping mode. Drive set at 1.5A. 0.95A
input with motors still, 1.45A on a 2-axis 10ipm move.

3. Techno-Isel gantry table. Two HL2100M473030 motors (Techno's part
number--I would need to open the motor housings to find the manufacturer
and their own part number), 4.0V parallel, 1.0ohm (X,Y), one HL2100M473040
motor, 4.8A parallel, 1.0ohm (Z). Ballscrews 4mm pitch--10,160 steps/inch
in 1/8 stepping mode. Drive set at 2.5A. 1.34A input with motors still,
2.30A on a 3-axis 60ipm move.

The 8.5A power supply seems a little bit of overkill for all three
machines!

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Best regards,

Randy