>>>>>>>>Ian, I think it's great that you would build your own driver. But to do so is not for the sake of saving money. Maybe as a learning excersize, but not to save money.>>>>>>>>>>>
Thanks for the replies guys - from all the traffic I seem to have generated, I guess I may have bitten off more than I can chew at present. I do have a couple of real simple driver boards which will drive the motors but they, and particularly the motors, get hot as hell when the motors are not moving and I was a bit afraid that they may fry themselves. I had hoped that there may be a relatively easy way to do a chopper drive with current control - I had naively thought that maybe it would be possible to grab a current reference from a higher powered FET output stage ( maybe driven by the existing output FETs/ Transistors) and feed that back into one of the 'standard' microstepping designs - perhaps even using another PIC chip as the current controller. As I said before, I guess I'm somewhat out of my depth here and since, while the 'spares box' is full of electronics bits, the bank is somewhat depleted, it looks like I may just have to root out a few big fans and go with what I've got.... -- 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
