Best posts made by herrtschaefer

@Diamondback This is one of the features i would really love.

I am using RRF 3.3 and the macro:

; Engage the toolchanger lock. RepRap Firmware V3.3RC3 version. 
G91                  ; Set relative mode
G1 U10 F5000 H0      ; Back off the limit switch with a small move

G1 U200  F5000 H3    ; Perform up to one rotation looking for the torque limit switch Y0.5 
					 ; H3 will modify axis limits they must be reset with M208 see below (use your axis limits)

;Pickup success detection | Aborts if no Tool picked up

M400                    ; Make sure moves are complete

if {abs(move.axes[3].machinePosition) > 90 || abs(move.axes[3].machinePosition) < 20}  ;if tool is not picked up | (Change 20 (half pickup) and 90 (no Pick up) to the value you need)
	echo move.axes[3].machinePosition ;debug output of the reached position 
	M208 U0:201         ;restore axis limits (see above H3)
	set global.tool_change_Aborted = true ;send error condition
	M98 P"/macros/tool_change/tool_unlock.g" ; Unlock the tool
	G1 Y-20				;back off 
	M291 P"Werkzeug nicht richtig geladen. Ursache gefunden und behoben? Erneut versuchen!" R"Warnung Werkzeug nicht aufgenommen" S3 T-1 x1 Y1 U1
	set global.tool_change_Aborted = false
	T{state.currentTool}
	if{job.duration != null}
		M25 ;pause job
		echo "Paused"
	else 
		abort "Aborted"

;Behaviour after successful pick up
echo "Picked up Tool",{state.currentTool} ;success message
set global.tool_change_Aborted = false ;reset error condition
M208 U0:201         ;restore axis limits (see above H3)
G90                 ; Set absolute mode

I will look into using M0 /M1 .