CoreXY Direction Correction Process
Case 1 : X,Y control reversed, XY motion opposite
A: Reverse X dir pin.
Case 2: X,Y control reversed, XY motion correctly
A: Reverse Y dir pin.
Case 3: X,Y control reversed, X motion correctly, Y motion reversed
A: Reverse X dir pin. Then exchange XY stepper.
Case 4: X,Y control reversed, X motion reversed, Y motion correctly
A: Reverse Y dir pin. Then exchange XY stepper.
Case 5: X,Y control correctly, XY motion opposite
A: Reverse XY dir pin.
Case 6: X,Y control correctly X motion correctly, Y motion reversed
A: Exchange XY stepper.
Case 7: X,Y control correctly X motion reversed, Y motion correctly
A: Exchange XY stepper. Then reverse XY dir pin.