Control buttons on the X-Controller

[LarryM]

Take a look at this thread to see if it helps:

Need to pause a carve? Grbl Feed Hold/Cycle Start

Got a carve running and you need to make a quick change? Don’t want to start over, just stop for a while? Grbl provides a method for pausing a G-code job without losing machine position. The pause function is called “feed hold”. You can issue a software command to Grbl to invoke the feed hold function or you can use a hardware switch to invoke feed hold. Both methods are an immediate command to Grbl to execute a controlled stop without losing machine position. It is an immediate soft stop. To…