How to add extra movement in Y axis just before Z homing

Hi
I got one DaVinci 1.0 converted now with mks board and e3dv6 with direct extruder with pancake motor and it didn't have enough torque so i mount stock davinci motor for direct extruder.

and now after homing X and Y on x y max if moves straight to center of the bed and now motor hits some of the printer parts, so I need to add a behavior so before each Z homing and before each print, carriage need to go
first in Y -20 mm and then to desired position. how and where can i change this in Marlin source code ?

thx for any help I just don't want to disassemble it again and put some new carriage.

Edited 2 time(s). Last edit at 08/24/2018 08:22AM by bogaskilop.

Did you find a solution?

One way to make an additional move of an axes, is to use G92, like: G92 Y0 - them move -20 in Y direction: G1 Y-20


You could put the following two lines end code in your print file,
G92 Y0
G1 Y-20



so at the end of a print, there would be the added movement of -20mm in the Y-direction.


Likewise you could start all your prints with code, that would first send the print head -20mm in the Y direction.