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

----- Original Message -----
From: "Robert Campbell" <bob@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, September 10, 2002 2:38 PM
Subject: 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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> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this as a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
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