Hi, If you want to use a BBB as the main CNC processor (including video/keyboard/mouse I/O), then you might want to take a look at one of the boards I sell:
http://xylotex.netfirms.com/OSCommerce/catalog/product_info.php?products_id=114 It has two DB25 ports, with one made for PC CNC control, and the other with general I/O. Both can be connected to DB25 breakout boards (BOBs). The xylotex config file sets up the main port for X, Y, Z and A stepper with 4 inputs for limit switches and 3 outputs for relay signal control. It has no provisions for the encoders that your system currently has. Having said all of that, I have absolutely NO idea what the TAIG control you have requires as far as control signals. Jeff www.xylotex.com On Tuesday, April 18, 2017 at 3:26:51 PM UTC-7, Siggi wrote: > > Hey y'all, > > I recently had a 4 axis Taig Micromill DSLS 3000 > <http://www.microproto.com/MMDSLS.htm> follow me home. I'm currently > driving it with Mach3 and a ThinkPad laptop, through the USB->Parallel port > module provided by Taig/Microproto, but this is ... sub-optimal. The driver > box takes what looks to me (a rank n00b) standard DB25 parallel signals for > XYZA step/dir control and spindle/coolant switching. The DLSL allegedly has > 1600 CPR encoders that hook into the control box and are supposed to > "servo" the steppers. From what I read the stepper drivers are half step > only, however, so I don't know. The only user-visible benefit to this that > I've seen is that if (when - *sigh*) I crash, the encoders detect it and > flag on the respective axis "limit" inputs on the DB25. Sometimes it seems > the USB module takes ... a while ... to bring this to Mach3's attention, > however. > I guess it may also help to have an acceleration/speed control loop around > the steppers? > > In any case, I want to kit my mill out with homing switches at least, and > perhaps limit switches. There are suitable inputs on the control box, but > they get ORed with the servo loop "limit" gunk, which means the control > software wouldn't be able to tell home from "limit". I'd also like to > liberate the ThinkPad from machine control duty. > > In any case, I'd like to hook up a BBB with Machinekit to the control box > I have already, and to hook up the home and perhaps limit switches to it. > Ideally I'd want a breakout with a DB25 feeding the XYZA axis and the the > spindle/coolant outputs, as well as the XYZA limit inputs. Screw terminals > would be ideal for the rest. > I wonder which cape or breakout board would be best/reasonable for me to > buy for this (I'm in Canada, in case that makes any difference)? > > Siggi > -- website: http://www.machinekit.io blog: http://blog.machinekit.io github: https://github.com/machinekit --- You received this message because you are subscribed to the Google Groups "Machinekit" group. To unsubscribe from this group and stop receiving emails from it, send an email to machinekit+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
