The optional Haas Automatic Air Gun provides a constant blast of air to the cutting tool to clear chips during dry machining. The auto air gun can be retro-fitted. Activated by M-code, the air gun can be programmed to turn on while the spindle is turning, or at the end of a cycle.
If your machine has an auto air gun option installed, you don’t necessarily have to activate it with an M code.
For manual activation, simply press the shift key followed by the coolant key, but make sure SHIFT actually appears on the screen before pressing coolant, unless you need to wash up, because that’s what you will be doing if you accidentally activate the coolant pump!