CAD CAM EDM DRO - Yahoo Group Archive

RE: [CAD_CAM_EDM_DRO] stepper controller - help

Posted by Tom de Witt
on 2002-11-16 11:52:40 UTC
Yes please! A short tutorial on this topic would be very helpful.

Tom

-----Original Message-----
From: JanRwl@... [mailto:JanRwl@...]
Sent: Saturday, November 16, 2002 1:24 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] stepper controller - help


In a message dated 11/16/2002 8:36:48 AM Central Standard Time,
dmauch@... writes:

> Not quite correct. The 65V is the maximum voltage that the manufacture
> recommend those motors to run at. Those motors have a per phase resistance
> of 1.52 ohm so the actual voltage would be about 3.5V. So I would
recommend
> a 36VDC power supply up to 65V maximum. But if you use the L298 then you'd
> better stick with the 35VDC power supply.

Dan: For quite a time, now, I have been slightly frustrated that 98% of the
members of our group are more "machinists" than "E.E.'s", so they clearly
have NO clue how a stepper with windings rated at, say, 4 amps, 3 volts,
need
a 24 to 80 VDC supply. The concepts of "current-limiting", voltage-dropping
either via the nasty huge "L-R resistors" of the old "six-wire unipolar
days"
or the more recently-espoused "chopper drive" technique float way above most
of our heads.

Now I readily admit I am too ignernt to explain all this adequately in few
words, but I am CERTAIN some E.E.'s in here like you, Mariss, etc., can do
so
admirably. Thus, it seems a short "tutorial" on what L-reactance does when
stepping-rate exceeds three or four steps per second, and how modern drives
"deal with that" (and why 24 VDC or more is needed in a supply for "four
volt
windings", etc.) would be very, very useful to us "in here"!!! Am I right,
guys?

Jan Rowland, old troll


[Non-text portions of this message have been removed]


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@...
Moderator: jmelson@... timg@... [Moderator]
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/

Discussion Thread

Boris Maraz 2002-11-16 04:57:10 UTC stepper controller - help Dan Mauch 2002-11-16 06:37:24 UTC RE: [CAD_CAM_EDM_DRO] stepper controller - help jeffalanp 2002-11-16 08:35:19 UTC Re: stepper controller - help JanRwl@A... 2002-11-16 10:23:58 UTC Re: [CAD_CAM_EDM_DRO] stepper controller - help Tom de Witt 2002-11-16 11:52:40 UTC RE: [CAD_CAM_EDM_DRO] stepper controller - help vrsculptor 2002-11-16 12:19:19 UTC Re: stepper controller - help William Scalione 2002-11-16 17:59:57 UTC Re: [CAD_CAM_EDM_DRO] stepper controller - help John Johnson 2002-11-17 09:09:57 UTC Re: [CAD_CAM_EDM_DRO] stepper controller - help foxwhole2000 2002-12-06 03:15:09 UTC Re: stepper controller - help jeffalanp 2002-12-06 11:32:36 UTC Re: stepper controller - help jagco1998 2002-12-06 15:54:23 UTC Re: stepper controller - help George Erhart 2002-12-06 16:15:28 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper controller - help jeffalanp <xylotex@h... 2002-12-06 16:19:37 UTC Re: stepper controller - help George Erhart 2002-12-06 16:47:47 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper controller - help foxwhole2000 <foxwhole2000@y... 2002-12-06 19:27:45 UTC Re: stepper controller - help jeffalanp <xylotex@h... 2002-12-06 20:24:59 UTC Re: stepper controller - help Brian 2002-12-07 11:01:41 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper controller - help George Erhart 2002-12-07 12:32:18 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper controller - help Brian 2002-12-07 14:32:06 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper controller - help