@db-cooper said in Help, the firmware can not be updated:
@dc42 ok,thank you ！！My printer is working now. I want to know how to fine-tune the feed volume of the extruder. Now the error is 1.5 mm per 200 mm.
Increase or decrease the extruder steps/mm in the M92 command, by +0.75% or -0.75% depending on the sign of the error.