Error 9 is a homing cycle error - it means GRBL isn’t able to find one of the homing switches, likely because of a wiring issue, faulty switch, or possibly a configuration issue (though if you haven’t changed anything this is pretty unlikely).
Error 9 is a homing cycle error - it means GRBL isn’t able to find one of the homing switches, likely because of a wiring issue, faulty switch, or possibly a configuration issue (though if you haven’t changed anything this is pretty unlikely).