Пишит Dev. Home Error что это означает?
Open left cover, see clutch in the middle ( that catches axle with four pin).
Shorten spring at the clutch (spring to be much stronger) . So it can catch axle at right time, dont skip any spike.
If that dont help put some kind of thin rubber in the clutch 0.5mm, between moving part of clutch and coil.
P.S.
Sorry for english