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