Stepper motor moving forth and back

vladko022

Hello friends,

Have some exprerience with problem of extruder motor ? Performs
so fast backward movement that to throw out filament. I connected motor to
X,Y-axis for trying functionality and working normally. I think that the
problem is not in motor. I  tried to replace stepper driver, arduino and ramp.
And also I'd checked wires and connectors and all those components are good. I
also attach video what my motor of extruder doing. Does anyone have experience
with this problem or knew someone help me with this  ? Thank you in advance for any ideas and
opinions.

video

Repetier

The video shows normal working extruder. If retractions are too fast for your extruder, use slower retraction speed or acceleration in slicer config. Assuming you use slicer controlled retraction.

vladko022

Thank you for your help, I'll try to change the value in Slicer. What values do you think are optimally ? Tried Someone printed with disabled retraction ?

Repetier

30mm/s should normally be no problem. Some extruders can do even 100mm/s.

No retraction will normally cause lots of ooze.

And with direct extruder you only need minimal retraction. 1mm often is enough. You just need to remove the pressure.