How to determine QPPS with less than 100% duty.

Questions about using encoders with the Roboclaw product line
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DanKSI
Posts: 3
Joined: Wed Nov 11, 2015 8:21 am
How to determine QPPS with less than 100% duty.

Post by DanKSI »

Hi,

I have a motor and quadrature encoder connected to a ST 2x45A. I would like to run through the velocity calibration procedure, but I won't be able to run the motor at 100% duty (current limitation). I am trying to determine what the QPPS value should be when using less than 100% duty. I think the rest of the steps make sense to me.

Thanks,

Dan K.
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Basicmicro Support
Posts: 1594
Joined: Thu Feb 26, 2015 9:45 pm
Re: How to determine QPPS with less than 100% duty.

Post by Basicmicro Support »

Run at X% then multiple the speed by 100 and divide by X. Motor speed is fairly linear relative to voltage. Duty cycle is basically voltage percentage,

For example if you run at 20% power and get a speed of 2000 then the QPPS is approx 10000.

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