OpenBuilds BlackBox supports the door-ajar detection features available in Grbl. In order to activate this feature, ensure you run a custom compiled version of GrblHAL that has this feature enabled. It is not available in the default Grbl configuration.

Note: This is an advanced feature, specific to machines with an enclosure, and not required for everyday use.

• Open the door to pause (and optionally park)
• Close the door to take grbl/grblHAL out of DOOR mode. It stays paused until you send a resume command using your controller.

• Go to OpenBuilds CONTROL > Wizards and Tools > Firmware Flashing tool > BlackBox X32 tab > Select “2/3 Axes CNC/Laser: Dual-Y with Door Switch” > Flash

Parking is configured in OpenBuildsCONTROL > Grbl Settings tab

• $41=2; Enabled with Override
• $42=4; Park the Z axis
• $56=5.0; Parking pull-out distance in mm
• $57=1000.0; Parking pull-out rate in mm/min
• $58=-10.0; Parking target in mm
• $59=3000.0; Parking fast rate in mm/min
• $60=0; Restore overrides as boolean
• $61=0; Safety door options as bitfield
• $392=2.0; Spindle on delay in s
• $393=1.0; Coolant on delay in s