Easy re-calibration after nozzle change



  • Hi!

    i faced an issue of "too many steps" after i change nozzle.
    because nozzles are different in size - each time it is changed i need to
    re-calibrate whole system
    10 steps "Measuring the trigger height"
    than manually edit config-override.g

    is there a faster way to do the change?

    also i have seen some discussion on tool change but did not find solution there .

    many thanks!


  • administrators

    You could use a nozzle contact Z probe, either as the only Z probe or a separate one just for setting the height offset. One way of adding a separate one would be to use a switch just off the edge of the bed that the nozzle can push down on.



  • Well, i have created 3-step macro and it works. For convinience i created a folder called Nozzle change
    I wonder, if it is possible to wait for an "anykey" within macros? than i can combine steps 2 and 3.

    David, maybe this can be included in your factory settings in a separate folder.

    Step 1

    ;=================================================
    ; 		Nozzle change macro 1/3
    ;=================================================
    ;source article 	https://duet3d.com/wiki/Calibrating_a_delta_printer
    
    M561 			; disable mesh compensation
    M208 S1 Z-3 		; temporarily allow Z moves down to Z=-3mm
    M564 S0			; to allow movement lower than where the firmware thinks Z=0
    
    M117 Please manually lower head to a paper height
    
    

    Step 2

    ;=================================================
    ; 		Nozzle change macro 2/3
    ;=================================================
    
    G92 Z0 		; define that height as Z=0
    G1 Z15		; Command the nozzle up 15mm 
    
    M117 Please attach Z-probe
    
    

    Step 3

    ;=================================================
    ; 		Nozzle change macro 3/3
    ;=================================================
    
    G30 S-1 		; probe the bed without resetting the Z=0 position
    M500			; store results
    
    M117 Complete 
    
    


  • nops. does not work. should i delete config-override.g ?


  • administrators

    @njjn2020:

    I wonder, if it is possible to wait for an "anykey" within macros? than i can combine steps 2 and 3.

    I am about to add a very similar facility to RRF. It will require corresponding updates to DWC and PanelDueFirmware.


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