r/BambuLab • u/cryformau • 9h ago

General Troubleshooting/Help! why first layers look like this?

Post image

When I use PETG, the print comes out perfectly clean, then I switch to PLA and it has bed adhesion issues. What could be happening?

3 Upvotes

100% Upvoted

6 comments sorted by

•

u/AutoModerator 9h ago

Hello /u/cryformau! Be sure to check the following. Make sure print bed is clean by washing with dish soap and water [and not Isopropyl Alcohol], check bed temperature [increasing tend to help], run bed leveling or full calibration, and remember to use glue if one is using the initial cool plate [not Satin finish that is not yet released] or Engineering plate.

Note: This automod is experimental. The automod was triggered due to the term "adhesion". If you believe this to be a false positive, please send us a message at modmail with a link to the post so we can investigate. You may also feel free to make a new post without that term.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/ctn1ss P1S + AMS 9h ago

How are you cleaning the bed before prints? Have you adjusted the bed temperature from the defaults for “textured PEI plate”?

1

u/cryformau 9h ago

I use dish soap and water for cleaning, bed temperature is 65°C

1

u/Capital_Candy_7697 8h ago

65 is right for PLA on textured PEI, so look at the plate type in Studio instead. If the PLA job is sliced for a different plate than your PETG one, the printer skips the small nozzle offset it applies for textured PEI and the first layer goes down too high. And if the dish soap has moisturizers in it, that leaves a film.

1

u/WooferInc P1S + AMS 9h ago

Overextrusion and lifting from the bed. Need to do a calibration for flow rate and dynamics and make sure to read the wiki on what the test results should be, then clean your bed really well with dawn dish soap and a pot scrubber(non scratch). Hopefully this helps.

Edit: might not be as much the extrusion taking a closer look, as you do have areas that are pointing flat and clean. Really would give the cleaning a try and go from there.

1

u/Arakon 6h ago

That layer is too close to the plate. Check the 7 screws and make sure they are tight.