Extruder Stepper is not working!
I just built a i3 from kit, MKS Base 1.2, everything working excluded the extruder stepper, I used the local control function "move axis", it is good for X, Y, Z, but the extruder. i tried to connect the extruder to the z-axis, running "move axis", and it's working. i am sure the wiring is correct.
Can i update the firmware to solve the problem? But i have no idea how to backup the existing program.
Please help, thanks in advance.