# Bed sensor critical failure!

**URL:** <https://forum.sovol3d.com/t/bed-sensor-critical-failure/3822>\
**Category:** Sovol SV01 Pro\
**Created:** [November 3, 2023, 1:17pm UTC](https://forum.sovol3d.com/t/bed-sensor-critical-failure/3822 "2023-11-03T13:17:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ThR4z0r](https://avatars.discourse-cdn.com/v4/letter/t/ed655f/32.png) [@ThR4z0r](https://forum.sovol3d.com/u/ThR4z0r)\
**Post date:** [November 3, 2023, 1:17pm UTC](https://forum.sovol3d.com/t/bed-sensor-critical-failure/3822/1 "2023-11-03T13:17:41Z")

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Need urgent help!, it was working fine yesterday, and now it does what it shows in the video  
[https://youtu.be/bBE2UMwHca0](https://youtu.be/bBE2UMwHca0) , how do i fix this, it has already damaged my bed and i feel that if i print like this it will damage the bed even more.

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**Author:** ![Bjoern](https://avatars.discourse-cdn.com/v4/letter/b/46a35a/32.png) [@Bjoern](https://forum.sovol3d.com/u/Bjoern)\
**Post date:** [November 4, 2023, 1:05am UTC](https://forum.sovol3d.com/t/bed-sensor-critical-failure/3822/2 "2023-11-04T01:05:44Z")

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You could test your touch sensor by activating it manually well before crashing into your printbed. If your SV01-Pro does not recognize it properly you’ll need to check wiring & connectors of your CR-Touch sensor.  
Connecting your SV01-Pro via USB to a host like Pronterface (aka Printrun) would allow manual testing using M280 g-code commands. [It is identical to testing a BLTouch as described here beginning from Step 2.](https://github.com/MarlinFirmware/Marlin/issues/6756#issuecomment-301854300)

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**Author:** ![HammyD](https://avatars.discourse-cdn.com/v4/letter/h/edb3f5/32.png) [@HammyD](https://forum.sovol3d.com/u/HammyD)\
**Post date:** [November 10, 2023, 6:44pm UTC](https://forum.sovol3d.com/t/bed-sensor-critical-failure/3822/3 "2023-11-10T18:44:57Z")

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From what is visible, it didn’t look like the probe hit the bed.  
To confirm, could you take a picture of the print head from the front with the probe extended?  
In the video, it didn’t look like the probe touched the bed so a picture would help.  
I don’t own this printer so I don’t know how to lower the probe but, if you’ve tried everything from the post above and it didn’t work, try to lowering the probe.