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stepper motor calibration

Posted by flavioc

flavioc

stepper motor calibration
May 31, 2016 02:36PM

Registered: 7 years ago
Posts: 7

Hello Experts,

one quick question from a newbie: I've a Prusa i2 with two stepper motors on Z axis, the driver is a single A4988: shall I set it's voltage calibration to the double, with respect to the usual value?

Thanks for any help on this.

Regards,

Flavio

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Downunder35m

Re: stepper motor calibration
June 02, 2016 10:19AM

Registered: 8 years ago
Posts: 778

I would not bother with too much current as the motors have little work to do when turning the threaded rod.
Let it go up and down at a fast speed and only if you miss steps go over the default setting.

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flavioc

Re: stepper motor calibration
June 03, 2016 01:09AM

Registered: 7 years ago
Posts: 7

Thank you, Downunder35m.

I will do as suggested. At the moment, all my drivers are set at the same calibration voltage, more or less.

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Downunder35m

Re: stepper motor calibration
June 03, 2016 05:24AM

Registered: 8 years ago
Posts: 778

I usually don't really bother with the current setting, I make the axis move back and forth through gcode at the max speed I intend to use.
Since this usually is below the physical capabilities I can turn the pots down until I loose steps and then just back higher until all runs fine.
No motor gets hot, not driver gets hot.