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hi michiel great job on the project! i am in the middle of attempting this myself. i have the cnc shield for my arduino and i used your config.h file and setting in grbl but when i try to manually enter x y coordinates in the serial screen i get a error "alarm lock press $h or $x to unlock" and if i enter either the motors just make noise and dont move until i hit the reset button. do you or anyone know or have any idea why im getting this mesage?
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