Triggers within homing files



  • I am trying to write a homing file which will home the axis if an endstop is not triggered. It homes the axis but it also gives an error in the console : G28 U Error: Homing failed . The relevant files are:
    HomeU.g

    M574 V2 S1 p"zstop"			; configure mmu2 filament feeder endstops at max end active-high
    M574 A2 S1 P"!e0stop"	                ; configure false extruder axis endstop at max end active-low
    
    M581 P"!zstop" T8 C0
    M582 T8
    M581 P"nil" T8 C0	
    
    M581 P"zstop" T11 C0			        ; activate trigger 11 on rising edge 
    M582 T11			 	        ; check filament sensor to confirm selector is unloaded
    M581 P"nil" T11 C0		 		; deactivate trigger 11
    
    ;M581 P"!e0stop" T12 C0		                ; activate trigger 6 on rising edge 
    ;M582 T12			 	 	; check filament sensor to confirm extruder is unloaded
    ;M581 P"nil" T12 C0		 		; deactivate trigger 6
    

    Trigger8.g

    M913 U50              		 ; reduce motor current to 50% to prevent bad noises
    M915 U S5 F0			; set stall parameters
    G91                   		 ; use relative positioning
    G1 H1 U5 F2000            	  ; move out 5mm
    G1 H1 U-100 F1000       	     ; move carriage to home
    G90                 		   ; back to absolute positioning
    M400               		     ; make sure everything has stopped before we reset the motor currents
    M913 U100       		    ; motor currents back to normal
    

    Trigger11.g

    M584 P3
    M291 P"Stuff happens. homing axis not allowed" S2
    

    I am running RepRapFirmware for Duet 2 WiFi/Ethernet 3.01-beta1+1 (2020-01-15b2) so it may be a bug but also it might be something wrong in these files.



  • What are the mechanics, and what is the Goal?



  • I'm running prusa's mmu2 on a cartesian printer with the duet. The goal is to disallow the homing of the selector axis if filament is fed through the selector.

    First M581 command will home the axis if the filament is not detected, the second M581 will hide the mmu axes and send the message.



  • Got it. Thank you.

    Have you seen the new RRF3 conditional gcode? I believe it would be perfect for this.

    https://duet3d.dozuki.com/Wiki/GCode_Meta_Commands



  • Yes, that's the ultimate goal but it will be a steep learning curve for me. Last time I checked I couldn't find anything related to endstops states.



  • Fair point, it is very early in the release of conditionals.

    The endstops will (should?) be in the object model. I don't have a machine accessible right now, but I believe they are down the "machine" > "sensors" part of the tree.



  • I can't see any machine part of the tree. I might be doing it wrong, I'm just running M409 in DWC and paste the return here .



  • M409 F"V" will get a much larger result.



  • No luck either, M409 F"v" returns:

    {"key":"","flags":"V","result":{"boards":[{"firmwareFileName":"Duet2CombinedFirmware.bin","firmwareVersion":"3.01-beta1+1","iapFileNameSD":"Duet2CombinedIAP.bin","mcuTemp":{"current":43.0,"max":43.4,"min":42.2},"name":"Duet 2 WiFi","shortName":"2WiFi","vIn":{"current":24.2,"max":24.3,"min":24.1}}],"heat":{"coldExtrudeTemperature":160.0,"coldRetractTemperature":90.0,"heaters":[{"current":25.0,"sensor":0,"state":"Off"},{"current":25.0,"sensor":1,"state":"Off"}],"sensors":[{"lastReading":25.0,"name":"","type":"Thermistor"},{"lastReading":25.0,"name":"","type":"Thermistor"}]},"job":{"file":{"filament":[],"firstLayerHeight":0.0,"generatedBy":"","height":0.0,"lastModified":"28115-10-29T03:41:51","layerHeight":0.0,"numLayers":0,"printTime":0,"simulatedTime":0,"size":0},"lastFileName":"","layer":0,"timesLeft":{"filament":0.0,"file":0.0,"layer":0.0}},"move":{"axes":[{"homed":false,"letter":"X","max":247.0,"min":0.0,"userPosition":0.000,"visible":true},{"homed":false,"letter":"Y","max":210.0,"min":0.0,"userPosition":0.000,"visible":true},{"homed":false,"letter":"Z","max":200.9,"min":0.0,"userPosition":0.002,"visible":true},{"homed":false,"letter":"U","max":75.0,"min":0.0,"userPosition":0.000,"visible":true},{"homed":false,"letter":"V","max":1000.0,"min":-1000.0,"userPosition":0.000,"visible":true},{"homed":false,"letter":"W","max":78.0,"min":0.0,"userPosition":0.000,"visible":true},{"homed":false,"letter":"A","max":1000.0,"min":-1000.0,"userPosition":0.000,"visible":true}],"calibrationDeviation":{"deviation":0.000,"mean":0.000},"currentMove":{"requestedSpeed":0.0,"topSpeed":0.0},"daa":{"enabled":false,"minimumAcceleration":10.0,"period":0.0},"idle":{"factor":0.3,"timeout":50000},"initialDeviation":{"deviation":0.000,"mean":0.000},"meshDeviation":{"deviation":0.000,"mean":0.000},"printingAcceleration":600.0,"speedFactor":100.0,"travelAcceleration":3000.0},"network":{"interfaces":[{"actualIP":"192.168.0.12","firmwareVersion":null,"gateway":"0.0.0.0","subnet":"0.255.255.255","type":"wifi"}]},"state":{"currentTool":-1,"machineMode":"FFF","status":"Idle","upTime":42}}}
    


  • Hmmm.... I'm near a machine now, and I don't see any signs of endstops in the object module either.

    Let me keep looking.



  • I found them running the latest beta.



  • I am almost there with the homing file using conditional code.

    if sensors.endstops[4].triggered && state.status.idle
    	M291 P"MMU loaded. Selector homing not allowed.Please unload MMU manually." S2
    
    if sensors.endstops[4].triggered && state.status.printing
    	M25
    	M291 P"MMU loaded. Selector homing not allowed.Please unload MMU manually." S2	
    
    else
    	M913 U50              		 ; reduce motor current to 50% to prevent bad noises
    	M915 U S5 F0			; set stall parameters
    	G91                   		 ; use relative positioning
    	G1 H1 U5 F2000            	  ; move out 5mm
    	G1 H1 U-100 F1000       	     ; move carriage to home
    	G90                 		   ; back to absolute positioning
    	M400               		     ; make sure everything has stopped before we reset the motor currents
    	M913 U100       		    ; motor currents back to normal
    

    But , obviously is not working because state.status.idle is not the correct way of expressing the value of state.status.

    Here is the state tree. Surely this is trivial for anyone who is used to any type of coding, not for me unfortunately.

    Edit: state.status == "Idle" .


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