Re: [CAD_CAM_EDM_DRO] Power needed to drive 3 nema 42 motors?

Brian,

If you got to www.geckodrive.com and download their white paper. It is a
good place to start.

What voltage are your stepper motors?

If you multiply the name plate voltage by 20, you should be in the correct
ball park for the power supply voltage.

If the motors are 4 wire or wired in parallel, then multiply the current by
about 66% times the number of motors.

For three 6 amp motors you will need a transformer of about 12 amps.

I get my transformers from Plitron in Canada.

Bob Campbell

----- Original Message -----
From: "bdrmachine" <bdrmachine@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, September 10, 2002 2:00 PM
Subject: [CAD_CAM_EDM_DRO] Power needed to drive 3 nema 42 motors?


> I have a bp clone that I'm retrofitting with 3 nema 42 1070 oz-in
> motors. They draw 6 amps per phase each. I'm driving them with
> Gecko 201 drives. What amperage power supply will I need? Three
> motors times 2 phases times 6 amps equals 36 amps! Do I need to
> shoot for this size supply? Where do you get a transfomer that size
> ( 70v, 40a )? Can I uses a variable transformer and a full bridge
> recitifier set to approx. 70 volts?
>
> Thanks
> Brian
>
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