Hard Limit Repair
A hard limit happens when a limit switch is tripped when it's not supposed to.
Note | Check for debris near the limit switch that was tripped. If you didn’t notice any bogging down or debris, you may need to adjust your limit switches.
Note | Sometimes spindle retracts the z limit switch may be tripped if adequate material is not removed during a milling operation.
1. Remove the Ghost Gunner's rear panel. Use a 2.5mm allen to remove 7 bolts.
2. Move the gantry center-rear by turning the y and z stepper motor couplings.
3. Turn your Ghost Gunner upside-down to access the z and y limit switches on the gantry. Take care not to lean the GG on the stepper motors while turning it over. Manually turn the rear stepper motor to move the spindle assembly forward to expose the z limit switch.
4. Use a 2.5 mm ball end allen to adjust the 2 bolts to the limit switch. Access the limit switch nuts with a 5.5 mm wrench.
5. Loosen but do not remove the bolts on the limit switch then re-tighten the bolts while applying pressure to the limit switchboard on the side with the metal spring-tab to push the limit switch further away from the workspace.
Note | In case of a hard limit error use the following image to locate and adjust the limit switches.