G30 S-1 Crash After Probe Sequence



  • Has anyone seen a machine crash following a successful probe sequence?

    G1 X400 Y400 Z5 ; move to middle of bed
    M401 ; deploy BLTouch
    G30 S-1 ; Probe point

    Following the G30 S-1 the machine drives back to X0 Y0, but ignores the end stops and collides into the hard stops.

    Any info on what I may be doing wrong?


  • administrators

    Do you have that sequence coded in a macro file? The reason I ask is that I don't think it's that sequence that is causing the crash, it's whatever follows it.

    The M401 command is not needed unless you are either using pre 1.19 firmware or you want the probe to remain deployed after the G30 command.



  • No macro. We are manually moving axes to those positions. When I try to perform just the G30 S-1 the probe does not deploy which is why I added the M401. There shouldn't be anything after the G30 S-1 as we are sending it through the touch screen.


  • administrators

    Which firmware version are you using, and what do you have in your retractprobe.g file?



  • Firmware version 1.19.2

    retractprobe.g
    M564 S0 ; don't apply limits
    G1 Z40 F10000 ; raise head
    G1 X-59 Y66 Z35 ; move over the post
    G1 Z7 F500 ; push probe down on post
    G1 Z35 F10000 ; raise head again
    G1 X0 Y0 ; move to somewhere sensible
    M564 S1 ; apply limits again

    This is where the problem is. I need to update this script to what I had in my previous script prior to updating to 1.19 from 1.18


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