Usb smooth stepper

[JAZZCNC]

I don't think so. The IP-M does not support slaving at all, not just slaved homing. Jazz can correct me if I'm wrong.

Yes your correct Gerry it doesn't and can't ever do so not even with a firmware update. I've contacted Cslabs about this and the Hardware doesn't support it so unless they change the hardware it can't ever use slaved motors.

I've seen people connecting step and dir of both x axis motor drivers to the same output on a bob. It's there some reason this isn't a good idea? If the IP-M can source/sink enough current this would work to slave, yes?

No this isn't a good idea. While in theory and practice it does works it gives problems due to the way drives work regards handling midband resonance. Modern drives compensate for mid band resonance and apply correction, problem is the correction only happens on one motor but at same time forces the other motor into resonance so it's a bad idea and often results in lost steps and crazy weird shit happening. (If 2 motors sharing one drive)
Also then there's slight timing differences and if your lucky enough to run the motors in range where you avoid resonance the timings can slowly run the machine into loosing positon and racking etc.!

JazzCNC, please do tell more on your implementation of the CSMIO/IP-M with AM882 drives, I am all ears...[/COLOR]

Connect just like any other drive except you connect to the IP-M Output terminal connections instead of going thru a BOB. Also the outputs are differential outputs meaning each output has it's own Positive & negative signal and are not connected to the common Ground like most regular BOB's do. This gives the best protection from cross interference and noise immunity, they are also very high speed signals as they are not optoisolated which can slow down signals. This high speed and noise immunity does come at a slight cost in that you lose some protection. Like I say these drives are industry standard and designed to work with Servo drives or high quality Digital servo drives that take full advantage of the extra speed and clarity of the signals and with this it's given that the person installing is competant. They don't suffer poor workmanship and misswiring.!