On Sunday, May 20, 2018 at 5:20:57 AM UTC-7, Eric wrote: > > That looks awesome! > > Are you going to be able to manually move the axes too, or is it now going > to be full CNC? > > At the speed that the XY axis turn the handles would have to be balanced and not near my private parts. That would hurt. The plan is full CNC. I have both a ShuttleXpress (on my MACH3 CNC router) and I'm trying out one of these on it since there's a windows driver for it. Ebay item # 221940342899
So with that I can manually move the axis. But I've run into a problem with the BBB-DB25/26 and since Xylotex doesn't release schematics I'm not sure exactly how I'll fix it. Jeff did reply to a request about making the IOPWR# an active high output on pin 1 so it would enable the PMDX-126 BoB. But I've run into another issue and I'm not sure if it's the BBB MachineKit or the way the Cape is wired. I pulled my LinuxCNC PC off the shelf and connected the same Probotix BB-RF I was using with the Beagle. So LinuxCNC on a parallel port. A bit of mucking around to get the correct polarity signals for Machine Enable and ESTOP. At that point I can jog in the positive direction, pull the limit switch wire on the terminal strip to simulate running into a limit. At that point like the Beagle the Machine Power button on the screen goes off. The checkbox for override limits is not greyed out and I can check the box. Now I can click on the POWER button on the screen and jog in the negative direction and reconnect the limit switch input to ground. This is the one that is shared for all three axis. When I release the jog button The Override checkbox is greyed out again. The MachineKit with BBB cape doesn't do that. Hit a limit and Machine POWER button goes off. That also brings the IOPWR# low which then disables the entire set of level translation buffers. And the Override limits remains greyed out. So now clicking on the Machine POWER button doesn't do anything because the limit switch is still active. There may well be a solution but I haven't figured it out yet. At the moment I don't think the Xylotex cape will actually be usable with MachineKit that has limit switches. -- 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.
