1.can't feed and retract， check reason：
https://youtu.be/pn63UDXZq9c
2.feed not good during printing， check reason：
https://youtu.be/PZUhnDcqyJg
3.EasyThreed K7, Can not feeding and retract, nozzle is hot, the filament stuck into gear.
https://youtu.be/RXp-3S0NjSQ
4.EasyThreed K7,Can not feeding, nozzle is hot, E motor broken, replace E motor video:
https://youtu.be/V2ynI0jBMCg
5.EasyThreed K7, When feeding , light not flash, nozzle not heating up, Nozzle replace video:
https://youtu.be/kqHHbjmVXBM
6.EasyThreed K7, X axis not move, X motor replace video：
https://youtu.be/Uz6O_t7StlI
7.EasyThreed K7, Y motor demaged, Y motor replace video:
https://youtu.be/DAQUakl5CBM
8.EasyThreed K7, Z axis not move, Z motor replace video:
https://youtu.be/gOdYx4DjMwI
9.EasyThreed K7, X direction print shift , X belt too loose or too tight, X belt adjustment video:
https://youtu.be/yPpICbNUnyg
10.EasyThreed K7, Y direction print shift , Y axis belt too loose or too tight, Y belt adjustment video:
https://youtu.be/F7AaO97Lh0k
11.EasyThreed K7, Z axis belt too loose or too tight, Z belt adjustment video:
https://youtu.be/1wNfwZAOmcE
12.EasyThreed K7, X axis belt come off, re-install video:
https://youtu.be/29Ns4m8NSeU
13.EasyThreed K7, Button no function, and online printing not work as well,motherboard dead , motherboard replace video:
https://youtu.be/Q3nH8pk7t3Q
14.EasyThreed K7, Feeding has problem, Extruder set replace video:
https://youtu.be/v0zqibPesfs
