1. #1
    I'm busy converting a BFE65 head with an unknown XY table + stand. It's coming along well - but I'm a little stuck with gearing the table/head...

    I'm using 3Nm SY60 steppers with a microstepping PM542 driver. It's driving 16mm x 5mm lead linearmotionbearing ballscrews. Any idea what factors I should be using to calculate my pulley ratios?

    Should I be basing it on what I want the jog speed to be, or max torque or pulses per inch? 50% torque on my motor is at 1650rpm (5.5k pps)

    Any advice would be most appreciated - thanks!

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    Last edited by jamezwarner; 06-09-2011 at 11:46 AM.

  2. #2
    This spreadsheet is a good start:


    You'll need to measure (or guess) the coefficient of friction of the slides ideally. Fairly easily done with a mass on string plus pulley arrangement, or better a force meter.

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