Second Pass on Homing Z with Bl-Touch

  • Hey everybody,

    I was working on my G-Code the other day and I was wondering if there is a way to to use a second, slower pass on Z homing with the Bl-Touch? I tried G1 S1 Z-300 F100 but my printer is ignoring these z homing commands and will only z home with G30.

    So is it possible to something like:

    G1 S1 Z-400 F1800 ; move Z down stopping at the endstop
    G1 S2 Z1 F3000 ; go back a mm
    G1 S1 Z-400 F100 ; move slowly to Z axis endstop once more (second pass)

    ... but with G30, or reduce the speed of G30 homing in general?

    Thanks a lot!

  • Think you are asking the same thing as me in the dive thread

  • You are right, I was under the impression you were asking for a way, other than G30. Thanks for the clarification, this post can be deleted.

  • @philippth sure you can.

    ; Z homing section follows
    G90 ; absolute positioning
    G1 X190 Y90 F4000 ; Move x and Y axis over to bed center so probe is on top of bed

    ; Set lower speeds for homing
    M566 Z5 ; Set maximum instantaneous speed changes (mm/min) (Jerk)
    M203 Z350 ; Set maximum speeds (mm/min)
    M201 Z100 ; Set maximum accelerations (mm/s^2)

    ; Probe the bed
    M558 A1 F350 ; Set single probing at faster feed rate
    G30 ; Do a single probe to home our Z axis
    M558 A10 F100 ; Set tripple probing at slower feed rate
    G30 ; Probe again to get a more accurate position

    ; Set normal speeds again
    M566 Z60 ; Set maximum instantaneous speed changes (mm/min) (Jerk)
    M203 Z600 ; Set maximum speeds (mm/min)
    M201 Z600 ; Set maximum accelerations (mm/s^2)


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