1. #1
    I have 3 m542 steppers, 33v power supply and the following three steppers for my x,y,z axis; Vexta steppesr:
    X= PK 296-02AA (2 Phase 1.8 step, DC, 3A)
    Y: PK268-03A (2 Phase 1.8 step, DC, 3A)
    Z: PK268-03A (2 Phase 1.8 step, DC, 3A)

    and a 5 axis breakout board like this one Click image for larger version. 

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    What setting on the DIP switches should I be setting Click image for larger version. 

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    Also what setting should I be setting in Mach3 in the motor tuning section.

    The travel of the x axis is 80mm per revolution of the x stepper motor if this is required for setting calculations.

    Thanks in advance for any help or advice. More info on my DIY build/retrofitting can be found here http://www.mycncuk.com/forums/diy-cn...html#post51435

  2. #2
    I'm not an expert in this but for a start I would use these settings.

    sw1 - ON
    sw2 - ON
    sw3 - OFF
    sw4 - ON
    sw5 - ON
    sw6 - ON
    sw7 - OFF
    sw8 - ON

    In Mach3 put the "steps per" at 20
    keep the acceleration and velocity low for now.

  3. #3
    I wouldn't use Eddy's settings. (Sorry Eddy no offence)

    Motors are 3A so go to nearest lowest not higher. . .So 2.8A going higher can lead to hot motors.

    Currant mode is for when motors are at stand still so set to Half current mode and they won't get red hot.

    Micro stepping will depend on few factors like PC speed and parallel port speed etc so I'd start lower first. So 800 Micro steps.(1/4 stepping)
    If your parallel port can stand the strain then having higher micro stepping gives smoother running motors and lessens chance for resonance.

    Are you sure it's 80mm per revolution.? That's a large pitch and low resolution.!! . . . . If correct then use 10 in Steps per in Mach. (80mm/800Ms=10steps per/mm)
    Last edited by JAZZCNC; 15-11-2013 at 01:28 AM.

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