On 7 August 2012 22:01, Alexander Grill <[email protected]> wrote: > Unfortunately I don't have a Step-Direction based card installed (I plan > to build a new one based on TB6560 or A3977, but that is rather a long > term goal). In the mean time, i want to use my old card (EMIS SMC-800), > which cannot be driven directly by linuxcnc.
> http://www.produktinfo.conrad.com/datenblaetter/950000-974999/967599-an-01-en-SMC_800_Schrittmotor_Karte.pdf > > Signals are described on page 11. There has to be something wrong with that information, as it gives the same bit pattern for 60% and 100% current. That can _almost_ be controlled by the Type 15 stepgen which lets you supply a lookup table of your own. It ought to be fairly simple to modify it to create 6 pins. (changes in lines stepgen.c 1211 and 1217 to add more phases, 308 to add more steps, and you can recompile just that file with comp (I think). However, the fact that you can only step one axis at a time looks a lot more troublesome. I _might_ be possible to enable three stepgens one at a time, and direct their output to the parport accordingly with a bunch of AND gates (in HAL, i.e. software). That is probably easier than writing a step generator component from scratch. To be honest, it all looks rather painful, and multi-axis stepper boards are €45 delivered on eBay. http://www.ebay.at/itm/280819674945 -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
