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1. How to change the Z axis screw?


 2. How to update the firmware?


 Firmware V1.0.3   V1.0.4(Add wifi, speed coordinate)

3. How to level the building plate of GR1?

4. How to check LCD of  Gr1?

5. What is correct setting(profile) for GR1?

    Basic GR1 profile(setting)

6. How to deal with License not accepted?


7. How to revoke license on D7/ D8 wanhao work shop?


8.How to move software from one computer to another computer?