Does anyone know where I can get the pin outs for the cables on the A350? I want to purchase this:
It will fit and make it so I can program using 4 or 5 axis. I know I can buy a spare cable from them and cut it in half to wire up both motors. Any ideas as to if this is viable at all? I hate to spend a few hundred for something that won’t work. Thanks in advance for any replies!
It’s doable as long as you’re keen on writing custom firmware and designing a custom microcontroller. You will need to develop a custom module to replicate the CAN messaging of the snapmaker module firmware.
Or alternatively modify controller to trick it into thinking the rotary module is always connected.
The rotary is the 4th axis. I’m not sure how your 5th would integrate at all. That would be significant software development of all new functionality.
I can give you the hardware pinouts but that’s not the hard part.
I am a programmer but I have never delved into drivers or firmware stuff. I think developing the microcontroller would be the hard part. It would be so nice. I have been wanting a 5 axis CNC since 1993 and I just saw the potential to have one. Guess it won’t happen soon then. 
I wish I could still buy this and just use the 4th axis part of it. That way I would have it in case the functionality if they decide to put it in later. Thanks for the input.
Assuming you get it all working, the other challenge is to find software to actually generate the toolpaths. Affordable software that is.
I haven’t found an affordable alternative for the rotary module yet. (and most other 4axis software just rotates it and does normal milling from that side. No real 4 axis toolpaths. (not always necessary of course, but still)