1.can't feed and retract， check reason：
https://youtu.be/XE_VpJydszY
2.feed not good during printing， check reason：
https://youtu.be/6fX9O6c6T8Q
3.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
4.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
5.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
6.During printing, feeding is weak, Insufficient load, the gap between the gear and wheel is too big, adjustment video:
https://youtu.be/jDPsgBNFpv4
Universal product： X1,X2,X3,X4
7.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
8.Y axis not move, Y motor replace video:
https://www.youtube.com/watch?v=lvzImM7eBZk
Universal product： X1, X2, X3, X4, X2plus, X4 plus
9.Z axis not move, Z motor replace video:
https://www.youtube.com/watch?v=jrWkN1x9mMw
Universal product： X1, X2, X3, X4, X2plus, X4 plus
10.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
11.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
12.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
13.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
14.Prints cant not stick platform, or fall off during printing. Re-leveling video:
https://youtu.be/kw2c50kw02Q
Universal product： X1, X3
15. 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
16.Y axis belt come off, re-install video:
https://www.youtube.com/watch?v=Z717zpX8IBo
Universal product： X1, X2, X3, X4, X2plus, X4 plus
17.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
18.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
