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Gradus M1 PRO CNC


Gradus M1 PRO CNC

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Product Description

The Gradus M1 PRO is a 4 driver / 3 axis CNC controller running GRBL v0.9. It has accepts pololu style drivers like the SD8825, SD6128 and A4988. It also has sockets for the newly developed Bigfoot driver profile which feature a larger footprint to accommodate higher current drivers like the BSD4989 running at 4 Amps!


Wiring Diagram



  • Runs GRBL v0.9 CNC firmware (pre-installed) v1.1 is also being tested
  • 48V Max input with on board 5V switching regulator
  • 4 driver slots using pololu style drivers.
  • 4 driver slots using new Bigfoot driver profile
  • 3 axis(X,Y,Z) with 1 available driver slot for slave mode (Y axis)
  • Isolated USB using ADUM4160 chip
  • 3 Home/Limit switch inputs, ESD and EMI filtered
  • 3 extra inputs for Feed hold, Cycle start and reset. ESD and EMI filtered
  • Probe input. ESD and EMI filtered
  • 2 outputs available for Flood and Mist
  • PWM Spindle control
  • 0-10V VFD spindle control (experimental)
  • Terminal block I/O connectors
  • Emergency stop pins (reset)

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Product Reviews

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  1. Excellent controller

    Posted by on Jul 2nd 2018

    The board is perfect, really easy to config and wiring, recommended to buy, I use it with BSD109A and 2.5A, the CNC run perfect.

  2. Fantastic controller

    Posted by on Jan 21st 2018

    Smw3d recommended this board to me with the bigfoot drivers. This board is fantastic. Easy to setup and works well.

    I didn't have to install any drivers and it connected perfectly.

    All though there isn't much info out there for this controller it's pretty universal for a cnc. I did have to put a small fan to cool the heatsink as I tripped the thermal protection once. I'm glad it stopped itself rather then blowing the driver.

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