Z Probe Already Triggered only when using G32



  • I have a voron 2.1 printer that has been working fine till this morning. I may have changed something in some config.... dont think I did but throwing it out there lol. I have 3 macros to setup Z probing. One for inductive homing fast to get a rough Z=0 and then a inductive homing slow when doing G32, bed leveling. After bed leveling x and y are homed again, and the Z probe is switched to an FSR for the nozzle to tap. All works really good until now. For some reason when using G32, both the first fast inductive home and slow inductive home at 0,0 (bed center) work fine, but something happens on the first G30 command to probe the front left of the bed. Below is the G30 sequence i use.

    G30 P0 X-125 Y-125 Z-99999 H+0.00
    G30 P1 X-125 Y+100 Z-99999 H+0.00
    G30 P2 X+125 Y+100 Z-99999 H+0.00
    G30 P3 X+125 Y-125 Z-99999 H+0.00 S4

    I tried performing the steps using the console to trace where the issue is. It seems like the first line
    G30 P0 X-125 Y-125 Z-99999 H+0.00

    I also noticed that along the Y axis once I get close the the limits of travel, with 0,0 being bed center the Z probe trigger value hits 1000. I think this is where the Z probe already triggered is coming from but why? I checked all the wiring and all is good.

    BTW using 2.03 latest. Any ideas?


  • administrators

    @nikker said in Z Probe Already Triggered only when using G32:

    but something happens on the first G30 command to probe the front left of the bed.

    What exactly happens? Do you mean the probe reading goes to 1000 before the sensor is close to the bed?

    @nikker said in Z Probe Already Triggered only when using G32:

    I also noticed that along the Y axis once I get close the the limits of travel, with 0,0 being bed center the Z probe trigger value hits 1000. I think this is where the Z probe already triggered is coming from but why? I checked all the wiring and all is good.

    If the sensor has an LED to indicate that ti is triggered, does the LED turn on at the same time the reading hits 1000? Are there any pieces of ferrous metal (e.g. linear rails, leadscrews) at either end of the Y axis that could be triggering the sensor?


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