Post by thread:PIC and controlling a stepper motor

Friends, I looked at piclist.com but the search did not come up with any answers. I also looked at the archive at Iversoft but my search did nothing as well. What I need to do is control a bi-polar stepper motor, fwd and rvs. Does anybody know of information (tutorial, code examples,...etc) or has any info that would be willing to share with me. I will be using the ST ( and ALLEGRO) 6219 stepper motor driver with a PIC16F874-20/P. Any help/advice would be greatly appreciated. Thanks alot!! Best regards, Steve Steven Kosmerchock Student/Father/Engineering Technician Radio Frequency Systems Phoenix Arizona USA http://www.rfsworld.com http://www.geocities.com/researchtriangle/lab/6584

This is my favorite treatment of the subject: http://www.beowulf.demon.co.uk/serial-stepper.html John Clark Indianapolis, IN {Original Message removed}

YIKES! That only HALF steps. How crude. Currently (pun intended) I am implementing microstepping using a pair of Allegro 3955 chips. MUCH better....simple too. Try them, you'll like them. BTW: GL, Walt... {Original Message removed}

Oops that went out too fast. The Allegro Product Description explains, in painful detail, the various stepping modes. For stepping and the 3955 all you have to do is implement the tables shown in the document. I've also done this with a 16C65 to microstep using high voltage, pass transistors and a hefty resistor (NO Allegro parts.) But that was inefficient. It is also described, I believe, in some App Notes at the MChip site. -W {Original Message removed}

www.cs.uiowa.edu/~jones/step/ looked pretty good --- James Newton (PICList Admin #3) spam_OUTjamesnewtonTakeThisOuTpiclist.com 1-619-652-0593 PIC/PICList FAQ: http://www.piclist.com or .org {Original Message removed}