Extrude motor "twitching" moving very quickly back and forth

K8200 3D Printer K8200 - Issues while printing
1

I was busy printing and the next moment the Extruder motor started to move slowly back and forth. Best to describe it as “twitching” - moving very quickly back and forth.

Other observations:
[list=]No filament is stuck, it does that with and without filament
No gcode problem. I used Cura and Repetier. Sam problem
I did change the tension between the 2 gears
Motor movement is very “lose” while printing. I can actually move it manually in both directions[/list]

Here is the interesting part. I swopped the Z drive on the board with the Extruder. Then it works perfectly. So it is not the Steppermotor
Then I plugged the Z Stepper into the Extruder port… and it work 100%
Swop both back and problem is back…

Anybody else had this?

2

Try setting the reference voltage to 0.55
You can also try backing the pressure off of the feed bearing (the one with the spring)

3

Thanks Wrong way. I will try it …

4

0.55 Volt did it. Thanks

5

Glad to hear it’s up and running.

Enjoy!