Vref in A4988

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dav76
Posts: 2
Joined: Wed Dec 28, 2016 4:28 am

Vref in A4988

Post by dav76 » Mon Nov 02, 2020 5:03 pm

Hi all,
as part of my tuning to my I3X I also had to increase the Vref of the Z-motor-driver to 1.2V by turning the potentiometer.
I chose this value because I have read people recommending values between 0.8V and 1.2V. However, I am puzzled by the fact that this recommendation seems to apply to all three axes. Yet, the Z-axis driver is actually driving 2 motors rather than one. So shouldn't it provide twice as much current? So shouldn't Vref be increased to a range like 1.6-2.4V?

thanks

dave

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