Fixing small parts that will not stick
The smallest pieces have the least bed contact, so they let go first. These steps help.
What you will see
- 1x1 pieces and tiny bases come loose mid-print
- Parts get dragged or flipped by the nozzle
- A pile of plastic spaghetti where a part used to be
What to try, in order
- Slow first layer (about 25 mm/s) and a clean plate: warm water and dish soap, and no bare fingers on it afterwards.
- A 3 to 5 mm brim on the smallest pieces. Our Bambu files add it for you.
- PETG: bed at 75 to 80 °C for the first layer.
- Print only a few of them per plate if they keep letting go.
Change one thing at a time and test with one piece, not a whole plate.
Good to know
- Parts with a rounded or pointed underside can let go however you print them; the pack lists them as tricky pieces.
- Files ending in “needs-supports” need automatic supports on.
Where we give numbers, they come from our own tests on a Bambu P1S with a 0.4 mm nozzle plus advice from other makers, and other printers need small adjustments. Our print settings page has the full table. Printed bricks are not toys: small parts, a choking hazard, not for children under 3.