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CNC controller help needed.

Discussion in 'CNC Mills/Routers' started by Brian Hull, Apr 24, 2021.

  1. Brian Hull

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    Hello all!

    This is my first post here. I'm building a new cnc router/ milling machine in the garage. I'm more of a mechanical engineer and don't know as much about the electrical control side. That's why I bought a Black Box controller for my MPCNC build project. Some I'm trying to figure out how to configure this MPCNC/ OpenBuild hybrid machine.

    The MPCNC has Nema 17 76 oz/ in stepper motors. I hooked up the black box and the motors got really hot and made a humming sound. I was using Openbuilds control software. The software made me select a open build cnc machine type and I picked Lead 1010 just to see it move. Now I assume I'm missing a step here and my software/ controller is not configured for the Nema 17 motors I actual have on the machine. Can someone tell me how I configure these motors and how to make adjustments to the control software to match the motor size? It seems pretty simple. I just don't know where to look.
     

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  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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  3. Brian Hull

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    Thanks for the info Peter. My Nema 17 motors are 1/8 steps so this is the default setting for the black box. I changed my machine settings to Arco 1010 machine which is a 1/8 nema 17 motor setup. That worked for a ball park config and my controller now moves the machine and the motors are only getting a little hot now. The control software says I traveled 9 inches in for the x axis when it is actually 46 inches. It's not reading the correct travel distance. Does the voltage adjustment screws change this? What is the technique to adjust to real actual machine distance? Do I adjust by measuring difference between controller readings and actual travel and adjust resister until they read correct?
     
  4. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Microstepping and current are different sections. Dial the current down as per the link.

    Steps per mm: calibrate using the wizards under Wizards and Tools
     

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