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  1. #10
    Quote Originally Posted by Sven View Post
    I'm building a 1250mm sq router planned to run at 10m a minute, using 2 nm steppers....
    Calculations suggested 8 nm would get me 12m a minute or so.

    Direct drive, 1610 screws, 2 motor/screws for the gantry.
    Don't need 8Nm for machine that size if slaved motors 3 or 4nm nema 23 will be more than enough provided the gantry is less than 80-90Kg and your using ballscrews. If used with good motion control card you'll get 12nm or more.

    I wouldn't use 2Nm because while they spin faster there will be very little torque left at the Mid/higher end of speed curve which is were you want it while cutting.

    8nm would mean Nema 34 which would actually run slower with the same amount of volts. So you'd need more voltage which means larger drives and PSU. Really Large steppers need high power drives that run at mains voltage for best performance.
    Last edited by JAZZCNC; 25-09-2016 at 03:33 PM.

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