1.Can not feeding and retract, nozzle is hot, the filament stuck into gear：
https://www.youtube.com/watch?v=y9-_U3lQ09w
Universal product： X1,X2,X3,X4,X2plus, X4 plus, K1, K2,K3,K4,K1plus, K2plus, K3plus,K4plus, K7,K8
2.Can not feeding, nozzle is hot, E motor broken, replace E motor video:
https://youtu.be/N6rHfAVnebc
Universal product： X1,X2,X3,X4,X2plus, X4 plus, K1, K2,K3,K4,K1plus, K2plus, K3plus,K4plus, K7,K8
3.When feeding , light not flash, nozzle not heating up, Nozzle replace video:
https://www.youtube.com/watch?v=IzpAT_1vT8I
Universal product： X1,X2,X3,X4,X2plus, X4 plus, K1, K2,K3,K4,K1plus, K2plus, K3plus,K4plus, K7,K8
4.X axis not move, X motor replace video：
https://www.youtube.com/watch?v=s7oa-umWc2Y&t=11s
Universal product： X1, X2, X3, X4, X2plus, X4 plus
5.Y axis not move, Y motor replace video:
https://www.youtube.com/watch?v=lvzImM7eBZk
Universal product： X1, X2, X3, X4, X2plus, X4 plus
6.Z axis not move, Z motor replace video:
https://www.youtube.com/watch?v=jrWkN1x9mMw
Universal product： X1, X2, X3, X4, X2plus, X4 plus
7.X direction print shift , X belt too loose or too tight, X belt adjustment video:
https://youtu.be/QGerRIGhZ74
Universal product： X1, X2, X3, X4, X2plus, X4 plus
8.Y direction print shift , Y axis belt too loose or too tight, X belt adjustment video:
https://youtu.be/aeu0qYJtCBw
Universal product： X1, X2, X3, X4, X2plus, X4 plus
9.Z axis belt too loose or too tight, Z belt adjustment video:
https://www.youtube.com/watch?v=wYKl83B7WvE
Universal product： X1, X2, X3, X4, X2plus, X4 plus
10.Button no function, and online printing not work as well, motherboard dead , motherboard replace video:
https://youtu.be/kENZVaovtcQ
Universal product： X1, X2, X3, X4, X2plus, X4 plus
11. Can not feeding because the tube under the gear is deformed, the filament can not enter into the nozzle, replace tube video：
https://youtu.be/ye1K1gCRn-8
Universal product： X1,X2,X3,X4,X2plus, X4 plus, K1, K2,K3,K4,K1plus, K2plus, K3plus,K4plus, K7,K8
12.Y axis belt come off, re-install video:
https://www.youtube.com/watch?v=Z717zpX8IBo
Universal product： X1, X2, X3, X4, X2plus, X4 plus
13.X axis belt come off, re-install video:
https://www.youtube.com/watch?v=R22uRrsjQnw&t=7s
Universal product： X1, X2, X3, X4, X2plus, X4 plus
14.Feeding has problem, Extruder set replace video:
https://youtu.be/v0zqibPesfs
Universal product： X1,X2,X3,X4,X2plus, X4 plus, K1, K2,K3,K4,K1plus, K2plus,K3plus,K4plus, K7,K8
