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  1. #1
    Join Date
    Nov 2010
    Posts
    2

    Question Stepper Motor Kits.

    I kits like the one below:
    kit Includes:

    3x ProboStep VX Uni-polar Stepper Motor Driver
    3x HT23-400-8 400ozin Stepper Motor
    PBX-2 Parallel Port Breakout Board
    24Volt 6.5Amp Switching Power Supply
    6ft. DB25 Male-to-Male Cable
    3x 4" IDC Cable 10-pin
    I look at the motor specs for this kit and each of these motors are rated at 4.2 amps per phase if wired in parallel. There are 3 motors here so that's 4.2 x 2 x 3 = 25.2 amps total. If they are wired in series then its 2.8 x 2 x 3 = 16.8 amps total. How can a 24v 6amp power supply be enough power to handle three motors?

    Wayne:drowning:

  2. #2
    Join Date
    Mar 2003
    Posts
    35538

    Re: Stepper Motor Kits.

    One, you can only wire it unipolar with that drive, which is 3 amps/phase.

    Two. You don't add the amps for each phase, you only count it as 3 amps per motor.

    Three. With chopper drives, the drive typically will draw2/3 or less of the motors rated current, or about 2 amps per drive.

    Which all adds up to about 6 amps. And often, they will draw less.
    Gerry

    UCCNC 2017 Screenset
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    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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