Issue with print after using pause at layer in bambu slicer

[ricemb]

Hello Everyone,

I am using the Bambu studio pause at layer in the slicer tool to switch out the AMS colors for a print that needs more than 4 colors. I’ve noticed on multiple different prints that the printer is off X and Y by 0.4mm (my extruder size) when returning from pause. Has anyone else used this and seen similar or not noticeable behavior?

I can provide pictures of the prints. I performed it multiple times and it seems like the 0’ing after the pause is not aligning with the previous 0 value.

[just4memike]

I’d be curious to know how long the print sat waiting for the restart? I’m thinking its possible that the print could partially cool and shrink causing the offset. This seems unlikely for a short print, but if its taller than 15mm-20mm high, it might be enough to offset a half millimeter on a long pause. Just a guess though.

[ZundersHD]

Its a known issue, some of the many threads on this forum about this topic with reliable workarounds:

Layer shifting after color change

Hi all After printing some print one color, everyting worked fine. Untill is started printer more colors. After a color change i got a layer shift. print after print… After some tests with different colors, it’s still happening. -I readjust the belts ( -I tried different slots -Sliced different models and different color layers -Adjust speeds reinstalled Bambu studio reset the printer to factory settings i have watched what happens when he changed filmant, i don’t see someting unusual. …

Layershift after Pause - Change Filament - Resume

Hi there, I tried to switch colour after some layers printed without AMS. Have set a “Pause” in Slicer righthand at the preview-slider. Pause works fine, then I change filament with the onboard “unload-load” tools. After resuming (press play 1x) the print resumes but about 1mm moved beckwards on the printplate. How can I fix this issue? Have seen many others with the same problems after Pause → Resume

Pause at Height or Layer Height

I have the need to pause my prints at a specific layer height to insert metal ID tags before resuming. On my legacy setups, I was using extensions in Cura, or editing Gcode for some printers that required non-standard Gcode commands to make this happen. Can you please tell me how to set a pause using your slicer? Or what Gcode commands does the X1C use for pause? & Add that capability if it doesn’t currently exist. I’d hate to have to go back to Cura & my old printers because of this.

[wkburkert]

is there still no solution?

[lkraus]

This issue has popped up in several recent threads, mostly involving color changes without an AMS. This thread reminded me that I did add magnets to a print not long ago.
Instead of Add Pause at the appropriate layer, I used Add Custom G-code:

M400 U1 ;pause
G28 X ;home

No layer shift.

[wkburkert]

I am using one AMS. I am now starting to record my test projects to help figure out what is happening. I just made a 40 layer cylinder, changing the layers every 10 layers, and there was a layer shift at layer 11. Layers 11 through 40 were all perfectly aligned and no layer shift at the layer 20, the 2nd color change, or the layer 30, the 3rd color change.

I see the problem only happening at the 1st color change and no others.

Question: How is the GCODE different at the 1st color change vs the 2nd color change?

[wkburkert]

So for nearly a year this has been a problem and Bambu Lab has not fixed the problem? Have they provided an updated? Have they acknowledged the problem? So unless I’m printing single color prints I’m going to have a layer shift at the first color change? Does Bambu publish a known problem list? I realize it may look bad but it might be helpful for those of us who have already bought the product so we can stop wasting time and money.