The Xmax endstop is set to be at a certain location, by default this is 200mm
eg
#define X_MAX_POS 200
This is probably not accurate
what you need to do is home X to the right then measure from the tip of the nozzel to the X0 position with a mm(inches are useless here) ruler keeping the ruler parallel to the X axis. Enter this value into the above line in your configuration.h
eg
#define X_MAX_POS 200
This is probably not accurate
what you need to do is home X to the right then measure from the tip of the nozzel to the X0 position with a mm(inches are useless here) ruler keeping the ruler parallel to the X axis. Enter this value into the above line in your configuration.h