I'm currently piecing together a shopping list to build an XY CNC (computer numerical control - basically computerized milling and production) machine. I'm looking at using this motor kit that provides NEMA 34 stepper motors with drivers. Where I get confused is on what controls the drivers; I know I need a motion controller to control the stepper drivers, or at least that's what I've gathered. I'm only looking to feed the motion controller G-code commands from a custom application.

I'm looking for a stepper motion control board for the CNC machine that:

  • can be controlled by sending G-code from a custom application
  • accepts said G-code over a USB connection
  • is compatible with NEMA 34 stepper motor drivers

For example, the Tiny-G board is exactly what I'm looking for but only supports smaller motors as far as I can tell.

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