flexi-bot/docs/marlin/_gcode/M401.md

tag	title	brief	author	requires	group	codes	notes	parameters	examples
m0401	Deploy Probe	Deploy the bed probe	thinkyhead	HAS_BED_PROBE	calibration	M401	Requires some kind of bed probe. This command has no visible effect for probes that don't move. They are just activated.	tag optional since requires description values H true 2.0.9.4 BLTOUCH_HS_MODE Report the current BLTouch High Speed (HS) Mode state and exit. type flag tag optional since requires description values S true 2.0.9.3 BLTOUCH_HS_MODE Set the BLTouch High Speed (HS) Mode state and exit without deploy. type bool	pre code Deploy the probe M401 pre code Enable BLTouch High Speed Mode M401 S1

Deploy the bed probe. The Z axis may raise up to make room for the probe to deploy.