LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

i think with a universal small controller you should rather look at the price and use the tried and tested

I'm no control motion board expert by any trade. First one. The "Legend" has it that they are noisy and spikey. Mind you I'm having no issue running a colorlight on my lathe which share the same 5V&GND for pretty much everything (rotary encoder, switches, stepper drives, estop, everything basically). Just got isolation on the Spindle/BLDC motor drive (obviously), but that's on the drive itself not on the motion control board. And so I'm a bit lost as to what's best isolation design, low-cost, "convenience-wise".

btw - I apologize for hijacking your thread and abusing your kind generosity (and expertise!!). Just trying to get a semi-universal "RIO Control Board" schematic out for the community to copy/paste and ideally do their own...

Edit: perhaps worth using another forum for those sort of questions?! If so do not hesitate to recommend one/more/many, and I'll be on my way out!!

Just checked my stepper drives and as expected (a.k.a. modern equipment), they do have built-in isolation (optos). Same as my spindle BLDC motor drive, all built-in modern stuff. And so wtf, why the excessive legendary need for so called isolation on those motion control boards for exactly? 

Calling the electron godz lol... 

yes, that's the reason why i only use opto's for the inputs and uln2003 for the outputs. That's perfectly adequate for the hobby sector

Strange things those control boards, tell ya. Interfacing digital is no problem for me, but I'm having a really hard time understanding why most folks use optos yet share the same ground as the motion board. No use imho...

I'll look into this external/digital isolation when my head functions again (happens once or twice max per month that lol). Probably going to need that  i s o l a t i o n 'as per the legend' , just dunno for what exactly.

Again, sorry for the hijack. I'm out. I'll update on progress ad schematics though. ~hacktheworld!

RIO related!!

Found a bug. They're really hard to find so I'm pretty happy about that

Should be "Angular", not rotary, in the axis joint/stepper plugin.

Enjoy your day, Olivier. All the best man.