Pololu drivers. That current limiting pot they have.

Hi all..

Mine have a small pot on them, I had a look at the data sheet and it discusses setting current limiting using that pot to change a Vref.
The A4988 datasheet that is, I can't find anything about it's use on the Pololu website.

So.. my question is.. have you had to twiddle that pot at all ? or is it not critical in this application ?

cheers,

Dave

Replies (1)

RE: Pololu drivers. That current limiting pot they have. - Added by hugomeiland over 11 years ago

Hi Dave,

this is about the best you can find: http://reprap.org/wiki/Pololu_stepper_driver_board#Tuning_motor_current
in my experience with the HPC3020 laser: just put them somewhere in the middle and it is about fine... steppers and mechanics are small and light so no problem.
just one thing to keep in mind: when you have no cooling element on them: make sure they do not get too warm, even after using the laser for half an hour or so, mines can still easily be touched with my fingers...

have fun!
Hugo

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