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  1. #1
    Join Date
    Oct 2017
    Posts
    3

    CNC Router Control System

    I have ordered a 3 axis 4 motor cnc router. One approach is to use LinuxCNC through a Mesa 7i92 to Geckodrive G540. And then I find the Leadshine MX4660. My question is, Why would I select one over the other? This assumes that the MX4660 is as easy to implement as the Gecko.

  2. #2
    Join Date
    Mar 2003
    Posts
    35538

    Re: CNC Router Control System

    The MX4660 can supply more current, and can take higher voltages, which basically means you can run larger motors.
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  3. #3
    Join Date
    Oct 2017
    Posts
    3

    Re: CNC Router Control System

    Quote Originally Posted by ger21 View Post
    The MX4660 can supply more current, and can take higher voltages, which basically means you can run larger motors.
    Thanks,Gerry,

    So the DSP technology (which I assume stands for Digital Signal Processing) doesn't present any advantage?

    Jeff

    Edit: Maybe I answered my own question. DSP seems to come into play in closed loop control with servo motors that provide feedback. The servo motor provides an analog signal converted to digital. DSP takes the digital signal and applies PID control. I would say that most would by the MX4660 for the voltage flexibility.

  4. #4
    Join Date
    Oct 2017
    Posts
    3

    Re: CNC Router Control System

    There is something that the MX3660/4660 has that may be an advantage and that is the smoothing switch. Leadshine makes no promises regarding its efficacy in your case. It looks like it is used to calm signals in the software stepping case with some borderline latency issues. It looks like a probability selection. You can do a Mesa board with G540 and get smoothness for $370+ or take a chance on MX4660 without Mesa board for $339, and possibly have to add a Mesa down the road.

  5. #5
    Join Date
    Mar 2003
    Posts
    35538

    Re: CNC Router Control System

    I don't know the technical details of how the DSP technology works compared to the technology that Gecko uses. Many people have said that the digital leadshine drives are better than Gecko's. I haven't used both to compare them, but I have some Leadshine AM882's that are very good.

    If wouldn't expect the Leadshine to be able to compensate for poor quality step signals. If you think you'd need the Mesa board with the , then you'd most likely need it with the MX4660.
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

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