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red A4988 Bad voltage value
Posted: Wed Apr 01, 2020 1:17 am
by valerio4a
Hi, my X-asxis A4899 (red) have a bad voltage from the srcrew and the ground, i find 0,02V and when i try to increase it jump to 5,00 V without any intermediate value. The oders A4899 are set correctly to 1,1V. I must change the controller?
Any suggestion?
Thanks
Valerio
Re: red A4988 Bad voltage value
Posted: Wed Apr 01, 2020 9:48 am
by William
Hi, Can you adjust the knob,
Increase voltage clockwise
Adjust the voltage counterclockwise
Can adjust
Measure while adjusting.
Re: red A4988 Bad voltage value
Posted: Wed Apr 01, 2020 4:57 pm
by valerio4a
Hi, yes i try to adjust via the screw but it jump from 0,02V to 5V no intermediate value is possible to set even with millimeter movement of the screw :
Thanks
Re: red A4988 Bad voltage value
Posted: Wed Apr 01, 2020 5:17 pm
by William
Hi, if so,
May lose control of driver board adjustment.