Co Print detects when it needs to change color with a switch attached to the x-axis. This switch must be positioned at the maximum point of the X axis.
It is important that all axes are at position 0 in the printer's menu. Place the switch at the maximum point of the axis using the switch module and screws that came in the box of Co Print. (Make sure that you separate the screw so that you do not crush the cables when attaching the screw to the switch.)
After installing the switch, you need to find out at what coordinate value the head of your 3D printer hit the switch on the X axis. For this, enter the "Move Axis" menu after Auto Home and move it until the head of your printer hits the switch.
Record the value exactly where it hits. Write this value in the relevant field on the Co Print App.