# Issues with z probe

**URL:** <https://klipper.discourse.group/t/issues-with-z-probe/20294>\
**Category:** General Discussion\
**Created:** [November 27, 2024, 3:50pm UTC](https://klipper.discourse.group/t/issues-with-z-probe/20294 "2024-11-27T15:50:26Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Myceliuman](https://avatars.discourse-cdn.com/v4/letter/m/e8c25b/32.png) [@Myceliuman](https://klipper.discourse.group/u/Myceliuman)\
**Post date:** [November 27, 2024, 3:50pm UTC](https://klipper.discourse.group/t/issues-with-z-probe/20294/1 "2024-11-27T15:50:26Z")

</div>

### Basic Information:

Printer Model: Custom (Artillery sidewinder body w/ clay 3d print extruder and metal tap probe system  
 MCU / Printerboard: E3EZ and cb1  
 klippy.log

### Describe your issue:

Halfway through probing the bed it exclaims z probe triggered prior to movement. The probe issue seems to be very inconsistent and I’m not sure exactly whats causing it.

[klippy.log](https://klipper.discourse.group/uploads/short-url/etdBCyvRZOZUeU2nMfbTfHYpMSg.log) (307.7 KB)

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<div class="post-metadata">

**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\
**Post date:** [November 27, 2024, 4:18pm UTC](https://klipper.discourse.group/t/issues-with-z-probe/20294/2 "2024-11-27T16:18:56Z")

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Usually this means the probe is either electrically or mechanically not stable, e.g. an inductive probe that is too near to the bed or too near to other disturbances and it gets trigger although it should not.

In your case, I’m not so sure since if you look at the log:

```auto
SDCARD_RESET_FILE cannot be run from the sdcard
SDCARD_RESET_FILE cannot be run from the sdcard
virtual_sdcard on_error
Traceback (most recent call last):
  File "/home/biqu/klipper/klippy/extras/probe.py", line 318, in _probe
    epos = self.mcu_probe.probing_move(pos, speed)
  File "/home/biqu/klipper/klippy/extras/probe.py", line 549, in probing_move
    return phoming.probing_move(self, pos, speed)
  File "/home/biqu/klipper/klippy/extras/homing.py", line 266, in probing_move
    raise self.printer.command_error(
gcode.CommandError: Probe triggered prior to movement

```

The message about `SDCARD_RESET_FILE` occurs first and the only place that actively calls this command is your `CANCEL_PRINT` macro.

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<div class="post-metadata">

**Author:** ![Myceliuman](https://avatars.discourse-cdn.com/v4/letter/m/e8c25b/32.png) [@Myceliuman](https://klipper.discourse.group/u/Myceliuman)\
**Post date:** [November 27, 2024, 5:17pm UTC](https://klipper.discourse.group/t/issues-with-z-probe/20294/3 "2024-11-27T17:17:21Z")

</div>

Its vision switch that uses a metal bar to interrupt the beam when the probe is open.  
[https://www.etsy.com/listing/1446827040/metal-tap-for-voron-cnc-voron-tap?ga\_order=most\_relevant&ga\_search\_type=all&ga\_view\_type=gallery&ga\_search\_query=voron+dab&ref=sc\_gallery-1-1&pro=1&cns=1&search\_preloaded\_img=1&plkey=146d399e74528452b6f503e1b8fb2772f5a97527%3A1446827040](https://www.etsy.com/listing/1446827040/metal-tap-for-voron-cnc-voron-tap?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=voron+dab&ref=sc_gallery-1-1&pro=1&cns=1&search_preloaded_img=1&plkey=146d399e74528452b6f503e1b8fb2772f5a97527%3A1446827040)

I disconnected the cable to the sensor and reconnected it and its working again but I wonder what the underlying issue is. Is there something wrong with the code thats causing it to pull sdcard\_reset\_file? Do you need the .cfg to diagnose that?

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<div class="post-metadata">

**Author:** ![Myceliuman](https://avatars.discourse-cdn.com/v4/letter/m/e8c25b/32.png) [@Myceliuman](https://klipper.discourse.group/u/Myceliuman)\
**Post date:** [November 27, 2024, 6:59pm UTC](https://klipper.discourse.group/t/issues-with-z-probe/20294/5 "2024-11-27T18:59:24Z")

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Its the optotap

> **[Voron Tap 5/24v compatible PCB OptoTap](https://west3d.com/products/voron-tap-pcb-24v-w-harness)**
>
> Introducing Voron Tap - the updated v2.4 PCB with optical sensor pre populated. Test-verified and safe to use. Get yours now!

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<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\
**Post date:** [January 26, 2025, 6:59pm UTC](https://klipper.discourse.group/t/issues-with-z-probe/20294/6 "2025-01-26T18:59:50Z")

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