Re: [CAD_CAM_EDM_DRO] Re: Voltage for Full Stack NEMA 23 stepper?

Jeff,
A very timely reply, since I also bought the same steppers, and need a
drive for them. I ordered a Proxxon MF 70 from Tim, and I think the photos
of his conversion, have one of your drives.

Marv Frankel
Los Angeles

----- Original Message -----
From: <xylotex@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, January 25, 2003 3:20 PM
Subject: [CAD_CAM_EDM_DRO] Re: Voltage for Full Stack NEMA 23 stepper?


> Hi Bob,
> I have some motors like that (from eBay:deepgroove1). You can run
> them with my drive, see:
>
> http://www.xylotex.com
>
> You can run them in series at full amp rating(1.75A = 100% max). Or
> you can run them slightly derated in parallel rating(2.5A = ~70%
> max). I have run them in parallel and got excellent results (much
> better than series) with a 24V power supply, but a fan is required
> for the drive.
>
> Although the max for my drive is 35V, this is absolute max, while
> typical running max is 90% of that, or about 30V. 24V power supplies
> are readily available, see the following for some switching supplies:
>
> http://www.mpja.com/list.asp?dept=3
> http://www.mpja.com/list.asp?dept=8
>
> For more info on the drive, see the web site (xylotex) above.
>
> Jeff
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "bereshr1 <bereshr1@y...>"
> <bereshr1@y...> wrote:
> > Hi There.
> >
> > So in the hunting and gathering process for my future CNC router /
> > mill I stalked and killed three NEMA 23 stepper motors. They are
> > spec'd out as Pacific Scientific Powermax II motors - 8-lead. I am
> > planning on running them bipolar (for nice, and mean projects) in
> > series. They are rated at 1.75A but none of the literature specs a
> > VOLTAGE at which to run them. On the label, it says "Vs(dc): 65V".
> > Normally, I would take this to mean that this motor is designed for
> > 65VDC.
> >
> > Is this the case with a stepper motor of this type?
> >
> > Most of the controller boards I've seen only have capability for up
> to
> > 35V. Any recommendations?
> >
> > Thanks in advance for your help.
> >
> > Bob
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
timg@...
> Moderator: pentam@... indigo_red@... [Moderators]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> 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 to be 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........
> bill
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>