HobbyCNC PRO Stepper motor driver board
The HobbyCNC PRO Stepper motor driver board Assembled and tested. Controls 4 stepper motors from your computer’s printer port! Ideal For Desktop Machining and Robots! Control Routers, Lathes, Mills, PCB Drillers, and Engravers! Just About Anything!

Out of stock


  • Assembled & Tested.
  • Heatsink included (will need to be reattached by user).
  • 4 Axis Unipolar Chopper control.
  • Individual OR simultaneous control of 2/4 Phase Stepper Motors.
  • Accepts 5, 6, or 8 wire stepper motors only. 4 wire types are not usable.
  • 42VDC maximum input voltage, 12VDC minimum input voltage. 24VDC Minimum Recommended Voltage.  Power supplies above 42VDC are not recommended.
  • 3.0 Amps Maximum per Phase, 500ma (.5A) minimum. Each axis adjustable throughout this range.
  • 1/1, 1/2, 1/4, 1/8, and 1/16 Microstepping.
  • Step and Direction Control.
  • Idle current reduction (Option) via Pin 1 Enable
  • Built In Protection Circuit to help against blown chips on stepper motor short or open connections.
  • 3.5″ by 6.875″ double sided with top silkscreen and thru plated holes and lead free solder PCB. (RoHS compliant).
  • Power On Reset.
  • On board voltage regulation for 5-volt logic with 24VDC cooling fan from motor power supply (fan not included)
  • On board connections for home and limit switches with 10K pullup resistor provided to each. No need for a separate “break out” board.
  • Works with Step and Direction software such as LinuxCNC, DeskNC, TurboCNC, Mach3, etc.
  • RoHS Compliant.
  • Compare product features.
  • Revision 2 board


HobbyCNC PRO Parallel Port Pinouts

Pin #Description Pin #Description
2X Direction 10Limit*
3X Step 11A Home*
4Y Direction 12X Home*
5Y Step13Y Home*
6Z Direction15Z Home*
7Z Step1, 14, 16, 17**
8A Direction18-25Ground
9A StepAll othersNot Connected
* The actual function of these pins is determined in the CAM software
** Pins 1, 14, 16 & 17 are made available via solder pads. Nothing is done to these lines on the PRO board. Straight from the D connector to the solder pads.

Additional information

Weight 0.6 lbs

HobbyCNC PRO 4 Axis Rev 2 assembled and tested
Heatsink drilled-and-tapped
(8) 4-40 screws
Thermal Paste, 1.0 gram

My PC doesn’t have a parallel port

You will need to get to the equivalent of a parallel port somehow to secure the required “Step and Direction” signals. There is more detail in the FAQ Options to a Parallel Port.

Is a special cable required to connect to my PC?

Yes. This is VERY IMPORTANT. You MUST use a 25-Pin, M-F, all wires, wired straight through. This is typically (but not always) a parallel printer cable. We sell a 6 and 15 foot Parallel Printer Cable that is tested and works!

What power supply do I need?

We recommend at least 36 Volts DC, and 3 amps per stepper motor. For a 3 axis board, a 9 Amp supply minimum, for a 4 axis board, 12 amps minimum. Never exceed the rated input voltage for the HobbyCNC board.


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