I would be very interested in getting a couple sets of your boards. I Have a retrofitted Induma F1 mill (bigger than a Bridgeport) that is currently being run by EMC/Linux on an old PC driving a PMDX 132 breakout board and Gecko drivers. Unfortunately, the PC is getting more than a little flakey and all the boxes on my junk shelf are either too old, too new or too broken to replace it. BBB looks like it could be a reasonable replacement but the PMDX 132 requires a parallel port / Centronics connector and Parallel port capes seem even harder to find than CRAMPS boards. Your boards look like they could be a good starting point.
On Friday, November 17, 2017 at 4:05:22 AM UTC-7, Rob M wrote: > > > > Hi, > I'm working on a 3 board solution, currently using it to control a cnc'd > BF20 \ G0704 mill. I\O is grouped logically as 2 PC Parallel ports, but > does not act as Parallel port. > > I have quite a few sets of boards that I've had prototyped, if you are > interested details are here: > > https://github.com/ozzyrob/pp_cape > https://github.com/ozzyrob/pp_bob_output > https://github.com/ozzyrob/pp_bob_input > > I don't know if these will work in your situation but if you even just > want to give them a go I have few spares. > > I realise they take up a bit more space than other offerings, but I my > intention was for them to be easy to assemble, a bit of modularity and easy > customization for those wanting to give it a go. > > The cape groups the signal to the connectors, I2C and analogue are > available directly off the cape, each 26 way header has 17 I\O and there > one I\O is brought out as an "enable pin". > > The daughter boards just do the basic 3.3v to 5.v translation, each group > of I\Os can either be jumpered for for Pull up or Pull Down, outputs can > either use an 74ls540 or 74ls541 for either inverted or non inverted > output.....depending whether you want to sink or source. > > All I\O screw connectors are paired with a +5v & GND connection, hopefully > to make wiring easier. Each step\dir axis is has a +5v & GND associated > with it. > > There is also a PyVCP test utility to test the operation before using it > in a full on config...just to make sure everything does what it should. > > Sorry for the long winded post. > -- 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 [email protected]. Visit this group at https://groups.google.com/group/machinekit. For more options, visit https://groups.google.com/d/optout.
