2009/12/10 Martin Pinkston <[email protected]>: > Andy, the 26 pin header pin out sheet is wrong. the Centroid guy saw a > picture I took and told me I had a different board than what he initially > thought should have been in this unit. > Let me see if I can take a picture of the pin out schematic and post it on > my blog. www.212steam.blogspot.com
Aha! EMC can quite possibly drive that, but it is a little wasteful on Parallel port pins. It needs to be unipolar for EMC to drive it, ie each motor phase wire can only ever go +5 or 0v. Is it possible to check the inputs to those terminals with a multimeter (with the motors stationary in a number of positions as far as the software is concerned? Probably best checked on the mating connector between the GND pin and each of the phase pins. If you see them alternating between 0v and 5v in a difficult-to-fathom sequence then you ought to be able to use one of the other stepgen types built in to EMC to drive the board. Have a look at http://linuxcnc.org/docs/2.1/html/man/man9/stepgen.9.html, especially stepgen types 9 and 10. (and feel free to come back with any questions, of course). I am at a bit of a loss to know how to decide if your drive is bipolar or unipolar. The motor lead count probably gives a bit of a clue. 4 wires = bipolar, 5 or 6 = unipolar, more than that = anybody's guess. (And I am quite prepared to have someone more knowledgeable to shoot me down in flames on any or all of the above) -- atp ------------------------------------------------------------------------------ Return on Information: Google Enterprise Search pays you back Get the facts. http://p.sf.net/sfu/google-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
