I’d check your grbl settings. You should type $$ in the console line to see them. To adjust them you have to find the ratio of what you want to what you get and multiply that resultant number by the grbl setting for the number that is saved. The setting most impacted might be $100, $101, and $102
GRBL_Settings_Pocket_Guide_Rev_B.pdf (diymachining.com)
See my post in this thread for more details
Calibrating my X-carve 1000 - X-Carve - Inventables Community Forum