Homing of Z-Axis failed on my A1

Bambu Lab A1 Series
62

After replacing the hot end, heating block (did I get that name right?), and the filament sensor It would home if I calibrated through the options menu or if I hit the home button in Bambu Handy app, but when it would try to home before a print it would fail with a z axis error.

I looked all over the net to try to find solutions and finally found someone who suggested I loosen the two screws in the back of the tool head that hold the two wires down. Suddenly, I can home it but now it scrapes the print plate when it starts a print.

Any suggestions folks? I bought this January 21st and am toying with returning it out of frustration. I really liked the way it USED TO WORK and would love to get there again.

Cheers,
BigJ

63

Yeah this is driving me crazy. My hot end seems to be just slamming against the build plate too hard on calibration and then I just get failed x axis homing, or when I try to print I get a failed bed levelling. Iā€™ve tried all these things.

65

Thank you for this post.

I got my nephew an A1 and was trying to debug this issue over the phone. He couldnā€™t update the firmware and when he tried to home the head it wouldnā€™t lower on the z-axis.

I got him to reseat the USB C connection on the head and check the connections on the bottom and it resolved the issue. If I didnā€™t see this post Iā€™d be trying to contact Bambu Lab on behalf of my nephew or trying to RMA. So this saved me a ton of headache.

Thanks again!

66

I got my bambu A1 mini back in october, Iā€™ve done several prints without much issue. And then today I got ā€œZ-Axis homing failedā€ So now Iā€™m scrambling to figure out what exactly is going on to fix it. 5-6 months with no problems and now this, hmmm.

67

You know what, I figured it out, the plate was nudged over, so I re-aligned it and that figured it out.

68

I solve this problem by removing small particle of filament from the end of the Y rail. Y was stoped earlier and nozzle ā€œfallā€ to the hall of the plate

69

I keep running into the same issue with a Z axis homing failed error. It seems random though and I havenā€™t been able to find a fix for it. When starting a new print, sometimes it will moves all the way to the top and stops and throws the error. My (irritating) solution so far has been to just cancel the print, push it back down about half way, and restart the print. The next time it homes correctly and prints fine. I havenā€™t noticed anything particular that causes it though. It hasnā€™t done it in a few weeks but just did it now.

70

Had same error, flip the unit over and reseat the connector cables. Gravity and vibrations will loosen them over time.

71

Iā€™m having exactly the same issue.

72

Thank you for this!!!

It was not exactly as you described it for me but pressing it down ā€at all timesā€ in the menu eventually made it go down and bump the bed.

73

en mi caso me paso al colocarle una boquilla 0.6 . Le cambie la boquilla a la clasica 0.4 y volvio la normalidad. La verdad no se que puede haber ocurrido pero volvere a tratar de usar la 0.6

74

Hi, for anyone who is having the same issue can cannot resolve the problems with the steps given in this post or other posts, I have something for you to try.
I bought my printer in February this year, and after one month of using it, it started to have the Z-Axis homing failure. Although I have already tried searching on the internet on how to solve it, some of the method works, but the problem will come back very soon, and the methods before this cannot help anymore.
However, recently I tried a method that works! So my solution was to simply flip the heat bed and print using another side of the heat bed, also need to turn on the Auto Bed levelling when you send the files for print. So every time I encounter this issue, I will do this then I will be able to proceed.
You can try this method and let me know if it works for you.
Hope this can help.