Re: [CAD_CAM_EDM_DRO] variable V power supply

In a message dated 09-Oct-01 18:38:37 Central Daylight Time,
cadcamcenter@... writes:

> Is it advisable to use variable voltage power supply to power these
> motor drives? Has anyone ever used variable voltage power supply to
> power these drives? Anyone has any plan/diagram/source for a variable
> voltage power supply that can drive these with sufficient capacity
> for any motors likely to be used for a Sherline or equivalent system.?
>

No! The very POINT of the Gecko drives is that THEY "regulate" the power
flowing through the motor windings. Thus, "regulation" in the power-supply
would be pointless.

You do NOT want to fiddle with limiting supplied voltage to limit the
motor-torque! That is the job of the Gecko drives, and if you adjust
supplied voltage, two things happen: The Gecko drive will "regulate" the
power to the motor UPWARDS, to maintain the set current, and it will write a
letter to the NSF, describing what has been DONE to it!

Mariss, of course, has vastly more smarts on this topic than I. I only know
enough to know one shouldn't even THINK of trying to vary DC-"down" to a
stepper-drive!

Regards! The Old Troll



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