Logic Current enough for large stepper?

Controllers Smoothie
1

I’m looking to use a couple of Nema23 3-phase steppers paired with 3MD560 drivers as well as Sparkfun’s level converter. Here’s my dilemma: the spec sheet on the driver says the logic circuit needs a minimum of 7mA to operate while the smoothieboard says it’s logic pins can only ouput a maximum of 4mA. I’m very new to all of this. Will it work, is there a workaround, or are the steppers & drivers just too large?

Imported from wikidot

2

The Sparkfun level converter you mentioned should be capable of sinking or sourcing plenty of current to drive the 3MD560 drivers, but honestly if you wanted to save a couple bucks you could accomplish the same thing with a non-inverting CMOS buffer like the 74HCT125 and save a few bucks.

3

Awesome. I really, really appreciate it man!