RE: [CAD_CAM_EDM_DRO] Circuit or Kit

You might want to look into the L297/L298 setup. L297 takes step/dir
pulses and produces phase signals (etc.) to drive the L298, which is a
driver for the motor. Loads of schematics on the web, and on
http://www.st.com/stonline/books/ascii/docs/1679.htm. Currently my L297
are on back order from Mouser, they have good prices though. They also
have heatsinks for the L298 (called a Multiwatt package). They also have
low ohm resistors for current sense (hint: use several parallel cheapy
resistors, rather than one expensive high-power one). They have the fast
diodes used to protect the L298 from the motor as well.

Regards,
JJ

Be Kind, Be Careful, Be Yourself

> -----Original Message-----
> From: John Bell [mailto:tango4@...]
> Sent: Wednesday, September 04, 2002 10:57 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Circuit or Kit
>
>
> Hi All:
>
> I'm looking for a Circuit, or Kit for Bi-Polar Steppers.
> Except for Gecko,
> I've only seen ones using 24 volts or less. It's my
> understanding that I
> should be running my Steppers up to 20 times their Labelled
> Voltage but at
> the Labelled Amperage. My Steppers are 6V and I would like to
> get up to 60V
> minimum.
>
> Thanks
>
> John Bell
>
>
>
> 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........

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
bill,
List Mom
List Owner



Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/