Flying Bear Ghost 4S why is there no filament supply?

Question

3D printers

Good afternoon!

Dear experts, help solve the problem, the Flying Bear Ghost 4S printer strangely controls the motor for feeding the filament. It looks like this: it makes a turn 1 degree forward and then a turn 1 degree back.
Essentially, the filament just wobbles in place.

The printer has been received and assembled. Updated firmware (on the old one it was the same). But I can't print anything. :(

Google didn't help me.

Give me an idea!

Thank you!

Answer 1

The case turned out to be in the order of polarities on the servo cable. Usually the servo rushes about instead of smoothly rotating when one of its windings pushes in the opposite direction to the other winding.
In this case, it is worth making sure that the sequence of pins at the output matches the sequence at the input.

Connecting Nema 17 for example