The BBB has pretty sensitive I/O pins without much drive (most pins are spec'd for 3 mA max). I'd recommend at least a simple buffer (like an 'HCT244/245) on the output lines, and something on the inputs to insure they *NEVER* go over 3.3V (or you will destroy your BBB).
As for pinout, there's no real standard. For most signals (step, direction, enable, endstops, etc) it doesn't really matter which pins you use. There are several example configurations for Machinekit which use the pinouts listed in this pinmux.ods spreadsheet: https://github.com/cdsteinkuehler/beaglebone-black-pinmux/blob/hal_pru_generic/pinmux.ods ...but you can move things around by editing the HAL file. I'm not sure what the LinuxCNC folks have for examples or standards, but I do hear they can run on the BeagleBone these days. On 10/29/2017 3:23 PM, [email protected] wrote: > Thanks I'll take a look. I figured i could just solder some wires from > output pins to a db25 connector. I've found more advanced users setups but > it never explains how they connected the g540 to the beaglebone. > > > On Tuesday, October 24, 2017 at 9:58:58 AM UTC-5, R3DP wrote: >> >> Replicape maybe? >> >> I have one that I'm about to install for 3D Printing. Using PRUS controls. >> All opensource as well. >> >> On Monday, October 23, 2017 at 8:44:49 PM UTC-5, [email protected] wrote: >>> >>> >>> Wanting to replace my dead CNC computer with a beagleboard. I have a >>> G540 controller. Everyone says to connect it to the beaglebone but I see >>> no tutorial anywhere on pinning up a db25 connector to the board. This >>> seems so simple... lol. Can anyone point me in the correct direction? >>> >> > -- Charles Steinkuehler [email protected] -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/f143e41a-8319-6646-1272-cc8d55a770e8%40steinkuehler.net. For more options, visit https://groups.google.com/d/optout.
