Recommend Motors and Drivers for CNC Router


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    Default Recommend Motors and Drivers for CNC Router

    I'm looking for some advice on sizing my motors and drivers for a CNC router that I am building. My machine consists of steel and 80/20 extrusions, with a 3'x4' capacity. My gantry will weight approximately 150 lbs. and I am utilizing 20mm linear rails and 2010 ball screws on all axis'. My plan is to use a Milwaukee 5625 router to start with and I plan to primarily cut wood and some aluminum. I was originally thinking about nema 23 570oz. motors and leadshine DM556 drivers. What are your thoughts?

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    Default Re: Recommend Motors and Drivers for CNC Router

    Pay attention to the inductance of the motors. If the square root of the inductance isn't 1/32nd of the voltage you're supplying to it (or at least close) then performance at high speed (which you need for cutting wood) will be compromised. Here's a chart for a motor like you're talking about: https://www.automationtechnologiesin...100-50-4BM.pdf It has 2.5mH inductance per phase, which is pretty good for a motor that size; according to the formula above it wants about 40v to run at full speed. Your Leadshine drives can handle 50v, so the combination should work pretty well. But all motors with the same holding torque don't necessarily have the same inductance, so make sure to check that before you buy.

    [FONT=Verdana]Andrew Werby[/FONT]
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    Default Re: Recommend Motors and Drivers for CNC Router

    Check out Teknic Clearpath, they are servos, with built in drive, three wire to step/directly, and two to power. Powerful also!



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    Default Re: Recommend Motors and Drivers for CNC Router

    A Nema 23 570oz motor only has about 80oz of torque over 600rpm.

    A 465oz Nema 34 motor will have close to 200oz of torque up to 1000 rpm.
    https://www.automationtechnologiesin...-single-shaft/

    I'd run it at 60V with 8060 drives.
    https://www.automationtechnologiesin...iver-kl-8060e/

    This will give you more than double the power of the 570oz 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)


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    Thanks for the responses. I think I will make some design changes to accommodate the nema 34 motors. I see there are different versions of the 860 drives, is there one that's better for my application?



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Recommend Motors and Drivers for CNC Router

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