https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/ Prusa3D Forum Discussion Board en-US Thu, 18 Jun 2026 04:59:18 +0000 wpForo 60 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-114575 Sun, 04 Nov 2018 04:43:40 +0000 I just had the same issue with point #3 ran the z calibration in pcd menu and cleared right up. One post was a hair off and even running the Prusa self test didn't find it.]]> Others (Archive) Voorhees Customs https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-114575 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-110109 Thu, 04 Oct 2018 09:25:36 +0000 Thanks everyone! This worked for me this time.]]> Others (Archive) benjamin https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-110109 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-106145 Thu, 06 Sep 2018 15:55:03 +0000 Put the kit together two days ago, printed a couple of things, worked very well and then I get this error. I didn’t do anything in the meantime. But a z calibration fixed it indeed.

Thanks,
Arthur]]> Others (Archive) arthur.g5 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-106145 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-99665 Wed, 25 Jul 2018 12:41:00 +0000 Thanks for the info I also had this problem.]]> Others (Archive) Magnus https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-99665 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-96604 Fri, 06 Jul 2018 23:23:32 +0000 The Z-calibration fixed this for me as well. I was figuring that this was going to be a big issue, but thanks to this forum, it was a very simple fix.]]> Others (Archive) Zeke https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-96604 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-92747 Sat, 30 Jun 2018 01:36:27 +0000 Others (Archive) Kevin Clay https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-92747 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-74883 Sun, 01 Apr 2018 05:19:36 +0000 Just to jump on the dogpile I'm grateful for finding this thread. I had the same issue after 3 really good prints all of a sudden it couldn't trigger the sensor on point 3. Z axis calibration fixed it and as with others for some reason my left z axis was clearly lower than the right. Fixed calibration issue.]]> Others (Archive) marco.b5 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-74883 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-67610 Thu, 22 Feb 2018 09:00:43 +0000 Same thing here... After weeks of a lot of printing without issues my MK2S this morning didn't mesh calibrate anymore.
After looking on the web I found this topic.

When looking at the X-axis it was immediately clear that it wasn't level anymore.
It's somewhat weird, as I printed with the printer yesterday without any issue and the axis was off by several mm.
(Must've been stuck on something while the head was descending or something)

Anyway I just re-ran the Z calibration, all's fine again.
A bit ashamed I didn't see this myself, but I'm definitely glad I found this topic and that it's not a hardware issue. Thanks!]]> Others (Archive) Steve https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-67610 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-59194 Sat, 06 Jan 2018 09:41:36 +0000 Others (Archive) hans.nyg https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-59194 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-49132 Sun, 10 Dec 2017 12:47:11 +0000 I just had the same issue on the third point. I did as gerryw suggested and took the extruder up to the bump stops and the issue was resolved

Thanks Gerry

BM]]> Others (Archive) BM007 https://forum.prusa3d.com/forum/original-prusa-i3-mk2-s-others-archive/bed-leveling-failed-sensor-didnt-trigger/#post-49132