I am getting layer shifts on my prints. Seems after the first layer. I have read a few similar threads but none seem to have a solution and they are fairly old so starting a new thread in hopes there is a solution I am unaware of. One thread mentioned turning off the 1st layer scan but id like to keep that since that is one of the reasons I bought the X1C. I am saving my parts as STEP files from Solidworks and seemed the shift has appeared when I switched over from STL and curious if this is a possible reason. I may try saving as an STL tomorrow but need to leave now so cant try it until tomorrow. Any ideas?
This might help you out if this is what you are seeing ? Layer Shift
What’s your settings and filament type ?
File types
I had this issue come up. Seemed out of the blue but what resolved it for me was the belt tensioners.
I redid the belt tention. They had somehow come loose or whatever. This seemed like a good time to go ahead and clean the rods etc… And the re tighten the belts. That solved the issue.
This video helped me a lot with the different maintenance stuff the printer needs.
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My shift is at least .5” in both X&Y so that seems more like a software glitch but will check belt’s tomorrow. Ive only ever printed Polycarbonate and a little PLA and PETG. I heard ASA and ABS were the issues causing the need to clean the rods. Does PC leave residue on the rods like ABS?
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Um, I can’t remember the exact numbers. Jim, from Edge of Tech had mentioned that if all you print is PLA and some other filaments but I just print with PLA so… That’s all I remembered for filament, but; that you should clean the rods from time to time, usually when doing other “big” maintenance.
So, when the layer shift thing happened and it was suggested here that I check the belt tention, I just went ahead and did the cleaning. I mean, it’s not like it hurts anything to do a little more maintenance… But only because I was fixing something lol
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The carbon rods should be checked. You will still see black on your cleaning cloth then you will know.
The belt will loosen up from new so if you are getting a layer shift you will want to check them.
Do the maintenance on your Z rods also with a 0.4 Z hop they are moving.
If the slicer software was doing it everyone would be getting it so look at your hardware.
Now if it is only one part doing it then you need to look at your cad or file type.
If you can post a photo of the bad part it helps others see problems and solutions.
Keep us updated 
Thanks everyone for the suggestions. Will do some vleaninge and maintenance. However with a huge shift i would be more inclined its a software glitch. Its happened a few times before and the shift in X&Y is roughly 1/2” or so. I feel like its a loss of position or counts between finishing the first layer then pausing for first layer check then starting back up. Its as if when it starts again its home reference is off.
Here is a pic.
Also is your MC board fan working correctly to cool the stepper drivers ?
What speed settings and volumetric setting are you printing at when this happens ?
I will have to check on the fans. Is there a video to show what I am looking for. Also as for speed and settings I am using the stock setting for the bambu labs Polycarbonate. Unsure what the speed is but I never adjusted it so its what is the default at the moment.
You can normally hear the fan running in the back left corner might be a u-tube video but this is a link to a post with information and other links MC Board Fan
What is the size of this part X & Y in mm
If you are using the Bambu Lab PC filament and profile for your next test print lets set the max volumetric speed to 20 just to slow it down a little more this also depends on your part size.
You can also turn on in printer options - Automatic-recovery from step loss but normally this is not a problem but it is an option you can use.
When printing under high acceleration or if the excess chute is blocked by pileup, there are risks that the XY motor will skip steps during printing. When the printer is homing, it will monitor the load of the XY motors to determine if the tool head has reached the end stop. Now, we use the same method to monitor the step skipping during printing. If skipped steps are detected, the printer will pause the print and do an XY-axis homing, then resume the print.
Did you check the video timelaps? if the base plate was not installed or the bottom layer was not moved. I had twice similar issue . One was that i did not put properly the base and the second time, just shifted the whole bottom layer after restart . But since i make sure that clean the base with soap , not using very often glue and double checking the plate. And watching the first 2 or 3 layers before i go away. If you want get Orca Slicer and has some interesting and simple tuning tests i am using it often and do not use the auto flow for calibrated filament , Bambu Slicer i use when do not have K and flow factors tested on
I was having layer shifts when I first got the printer (end of March). I disabled the step recovery feature and the shifts went away. I’m not sure if the later firmware updates fixed that or not, but I’m just leaving it off.
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Thanks everyone for the advice. I think its a random occurance. I have been prininting continuously since and have not had a layer shift sense. Seems I get one every now and then. I may try lowering the Volumetric speed down a bit on the PC just to see if it helps with a few other issues I am having on occasion.
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Hello.
I’ve just had first layer shift happening on X1C.
PLA, 220C and I was using silent profile because i went away from home so my mindset is that I dont need to use speed if not needed anyway.
Part was sticked to bed firmly, so that is not the issue.
I was printing ‘katana’ toy/model for the first time and because layer shift(s) it is not expanding like it should.
The model is on thingiverse, id: 3639693
Using Orca slicer since first day.
I am having printer for about two weeks now without any issue untill now.
The version I use is latest 1.8 beta
Will reprint it now in standard speed with same gcode, however because I had major issues with layer shift on old ender3, I bought X1C.
I just hope this is one issue and will not happen again… will post back if I get layer shift again on reprint.
If anyone has any other info about this issue, please post info.
(Check the pictures… it seems that there is no layer shift on outside, only on inside…
Edit: cant embed pictures here)
I’ve just reprinted sam file and again, layer shift but on different height. So that excludes possibility of corrupted file… here is the pic, left is old one, right is new one, i am pointing where layer shift occured to be easier to see
To avoid confusion, the part where the “blade” is is oriented on print bed, thats why i say they are not on same height.
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Same here, have you found solution to this problem?
No, however it seems that this is only model where I faced this issue. Did you print same model or different? Post some pictures if you dont mind…
hi Qapla, I have exactly the same problem with the catana and the sword, although a few months ago the impression was great. today this is not the case, and I opened an incident at bambulab they were responsive, they asked me for the STL files and the data of the X1 carbon when printing the part, I am waiting a return from them.
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Hi.
Thank you for feedback. Please reply if you get answer.
I am a bit busy last few days so cant reprint and debug, however also if I get to some information, I will post.
Best regards