Hi dewy721,
I'm running an EMC2 based 3 Axis mill CNC with a "traditional" parallel port setup.
I'd like to know first if you think this approach would be good to add a 4th rotary axis with an arduino+stepper driver.
I have built the 4th axis with a NEMA23, Arduino UNO and 3A stepper driver that I had in my shop, and I would like to add it to my machine. I've already tested my setup with Grbl + GcodeSender and the new axis is doing great. Now is time to add it to my current build (off course my parallel port interface has only 3 axis hence the Arduino + Driver idea)
I have read your post and Git Hub instructions, but before disrupting my current setup, I'd like to know your ideas about this kind of setup.
Regards.
Crispy