On 11/05/2015 09:31 PM, Gene Heskett wrote: > On Thursday 05 November 2015 21:55:00 MC Cason wrote: > >> Gene, >> >> I uploaded some pictures to Flickr, to show you how I have mine >> done: >> https://www.flickr.com/photos/46689581@N03/albums/72157660780465122 >> > Neat. But I'll need to come up with a more compact mounting for a bunch > of them to run a tool changer. Perf-board likely will be about ideal > but I'll need to find space on that size of perf-board for at least a 5 > pack of those. I can still conserve I/O pins on a 5i25 by useing 3 bits > as an address generator and 3 more for enable/step/dir. I don't see > more than one motor moving at a time, but with conventional wiring, a 5 > motor setup is 15 output pins. I think I can beat that down to 6 if > only one motor at a time is to be moving. 3 to address which motor gets > the signals, and 3 for enable,dir,step. All dir and step can be shared, > but the 3 bit address only enables the one addressed.
I don't have a tool changer, so my comment may not work, but why not have LinuxCNC send a signal out to a microcontroller, let the microcontroller do it's job, and then have the microcontroller send a signal back to LinuxCNC to tell it when it's done? I do not consider myself a programmer, but I'm still able to make the Arduino software give me what I want. If a stock Arduino board doesn't have enough pins, the Teensy series of boards have more pins available. For me, $20.00 for the 3.2, and $12.00 for the LC, was fairly cheap, considering what other boards on the market cost. Both of them use the Arduino software (with addon sofware) as it's IDE. https://www.pjrc.com/teensy/teensy31.html https://www.pjrc.com/teensy/teensyLC.html This is how the RepRap guys mount their boards: http://reprap.org/wiki/A4988_vs_DRV8825_Chinese_Stepper_Driver_Boards The perf board is just for prototyping, and I'm a couple of mods beyond the one in the pictures. When I'm finally satisfied, I will have a few circuit boards made. I know two people here locally that are interested in their own boards. $48.00 for 3 from OSH Park, or $47.00 for 10 directly from China. Decisions, decisions... > > But I'm going to be out of pocket for a bit, tomorrow I get the brakes > redone on my GMC, If amazon manages to deliver Saturday, I'll be busy > putting our local AM'er back on the air at full power. Monday I am > scheduled for a pair of saddle block shots in whats left of my back, and > if amazon doesn't deliver till Monday, I'll have to see if I can finish > that transmitter after I get back from the shots. Might not be able to > pull that off till after the shots have taken effect. I was informed > I'd need a driver. Last time I drove myself home. But that was 2 years > ago. As a friend was fond of saying, I'm not the man I once was, even > once. ;-) > > Thanks, MC Cason. > > Cheers, Gene Heskett I know what you mean about having back problems. I've been disabled for 14 years now, and live in constant pain. I bought all of my machine tools to keep me from going crazy. -- MC Cason Eagle3D - Created by Matthias Weißer github.com/mcason/Eagle3D ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
