The Door Sensor input is used to detect the opening and closing of an enclosure door. This door protects the operator from debris and helps contain coolant.

When the sensor detects that the door has been opened, the spindle and coolant will turn off and machine motion will stop.

The method used to resume operation depends on the options selected in the F1 General Settings screen.

The door sensor can be:

• Mechanical
• Optical
• Proximity

The sensor must output:

• Logic Low when the door is closed, or
• Logic High when the door is open

If the sensor logic is reversed, the input can be inverted by selecting it and pressing the space bar.

The door sensor is optional on MASSO G3 and MASSO Touch, but a door sensor must be assigned in MASSO G2, even if it is not used.

Wiring the Door Sensor

This example shows a switch used as the door sensor.

The resistor is used to limit fault current if the wire to the switch comes into contact with GND. This helps prevent the fuse from blowing.

The positive supply for the switch can come from the MASSO auxiliary terminals or directly from the main power distribution point.

The resistor is optional but recommended and must be mounted at the MASSO end to be effective.

The switch is shown in the door open position, and the input is inverted so that when the door is closed, the input changes to Low.

This switch configuration is fail-safe. If the wire to the switch breaks, the input will show the door as open.

Resuming Machining After the Door Is Opened

When the sensor detects that the door has been opened, the spindle and coolant will turn off and machine motion will stop.

If “Enable Cycle Start on Door Close” is NOT enabled

The operator must press the button after closing the door to resume machining.

This will automatically restart the spindle and coolant.

If “Enable Cycle Start on Door Close” IS enabled

The machine will automatically restart the spindle, coolant, and machining when the door is closed.

Conditions where Cycle Start on Door Close is temporarily disabled

• If a new program has been loaded or the Rewind button has been pressed and Cycle Start has not yet been pressed. This prevents the machine from starting unexpectedly before setup is complete.
• If Feed Hold is used before or after opening the door. In this case, the Cycle Start button must be pressed after closing the door to resume machining. Automatic restart will resume normal operation the next time the door is opened.

• If the machine is jogged while the door is open. After closing the door, the Cycle Start button must be pressed to resume machining. Each press of Cycle Start will return an axis to its original position in the order X, then Y, then Z. After this, the spindle and coolant will start and machining will resume. Automatic restart will resume normal operation the next time the door is opened.