RE: [CAD_CAM_EDM_DRO] Circuit or Kit

Well, sure, if you want fewer parts, more current and a cleaner board
layout you could do that :-) Too bad my L297's didn't come before my
L298's.

Thanks!

Regards,
JJ

Be Kind, Be Careful, Be Yourself

> -----Original Message-----
> From: Steve Blackmore [mailto:steve@...]
> Sent: Wednesday, September 04, 2002 8:35 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Circuit or Kit
>
>
> On Wed, 4 Sep 2002 20:05:21 -0400, you wrote:
>
> >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.
>
> You also may want to look at forgetting 298's - have a look at my
> webpage at
>
> http://www.pilotltd.net/cnc.htm
>
> and use L6203's instead. More expensive in the first instance, but
> much lower in the component count and double the available amperage.
>
>
> Steve Blackmore
> --
> Pilot Consultancy Limited ***** Computer Consultants
> Telephone 01744 752256 Mobile 07831 768478
> Email: steve@... WWW: http://www.pilotltd.net
>
> 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/