Hi, I'm considering cnc'ing my Harrison Lathe and have a couple of steppers which will do the job nicely. However, they take about 4.5AMPs and I'm having difficulty finding a driver circuit to control them with. Due to very limited funds I'd like to build the drivers myself and I'm thinking that a PIC controlled microstepping driver would be nice. The primary sticking point at the moment is that I can't find any decent information on how I might incorporate current limiting and 'off-use current setback' into a design. there are one or two circuits on the web for PIC based microstepping drivers but they all seem to be limited to about 2Amp output with no indication that I could beef up the FETs without everything toasting itself. I'm not too well clued up on this type of electronics so any help you could give would be very much appreciated or, if you could point me to a web resource which would help me, I would be very grateful. Thanks..
-- Best wishes, Ian ____________ Ian W. Wright Sheffield UK "The difference between theory and practice is much smaller in theory than in practice..." ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
