Max axis travel problem

Hi I have a problem regarding the max travel of the axes. I have a co2 laser with a working area of ​​1900mm X 900mm. If the laser moves above 900mm it stops so I have to restart grbl and move again and if I do the homing it does not stop.
Max travel in grbl is correct. This happens with every software I use. Can someone help me?

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my machine is a 80w co2 laser that I modified using a mks dlc32 with DM542 stepper drivers that work at 24V. As I already wrote with any software I get the same problem. It is not a problem of Grbl settings.

Which means it is a machine setting issue. In the console window type $$ then press enter. Copy and paste the output here for examination.

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