Bai Shuwei schrieb: Please don't cross-post.
> hi, all > I bought a SMC1500 stepper motor card. And it can connect with host > through parallel port. My target board is PowerPC 440, which hasn't > parrallel port. So I bought a PCI to Parallel line for SMC1500. But when > I run the stepper motor, I find it's not stable. I doubt there are > somthing wrong with my PCI to Parallel line. So I beg somebody can tell > me where I can bought the appropriate conversion line from PCI to > parallel, and does somebody give me some idea about how to control my > stepper motor through PowerPC 440? thx all Put that PCI Card to your host where your stepper was working properly to see if it's a hardware issue with that card. Then it depends on how you control your stepper motor. If you use some bit-banging (which I wouldn't recommend) to drive each winding and want to have smooth movement, you need a very precise timing when it comes to some "more than low-speed" stepper motors, otherwise your motors will start to coggle. To be precise: you will first have to figure out what leads to the effect of "it's not stable". Do you have an Oscilloscope? Regards, -- Clemens Koller _______________________________ R&D Imaging Devices Anagramm GmbH Rupert-Mayer-Str. 45/1 81379 Muenchen Germany http://www.anagramm-technology.com Phone: +49-89-741518-50 Fax: +49-89-741518-19 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
