Bambu A1 Mini First Layer Not Sticking: Causes & Fixes

Research note: this guide is compiled from two Bambu Lab Wiki guides, Bambu Lab’s A1 mini and A1 spec pages, one Bambu Lab forum thread and one Stack Exchange question. We do not test products ourselves; every step links to where it comes from. See how we research.

First, which way is it wrong?

Bambu Lab’s guides treat a first layer that sits too high and one that sits too low as different problems, and the fixes point in opposite directions.

What you see	Likely direction	Start with
Lines are round and separate, corners lift, the print pops off	Too high, or poor adhesion	Plate type in the slicer, then wash the plate (Bambu Lab Wiki [1])
Peeling, bulging or wavy lines; the nozzle nearly touches the plate and little filament comes out	Too low	Bed leveling, then the hotend heater assembly (A1 series guide [2])

Why the plate setting matters so much

Bambu Lab’s first-layer guide [1] explains that the same filament prints at different bed temperatures on different plates, so choosing the wrong plate in Bambu Studio can leave the bed too cold. It also says that on the Textured PEI Plate the printer lowers the nozzle after leveling to press the first layer into the textured surface. If you print on Textured PEI but slice for another plate, the nozzle ends up too high.

Two official numbers for the same offset. The first-layer guide gives that Textured PEI offset as 0.04 mm. The A1 series print-issue guide [2] shows the default start G-code as G29.1 Z{-0.02} and describes the toolhead as “usually pressed down 0.02 mm on a texture board”. We could not confirm which figure applies to current A1 mini firmware. Neither page asks you to change this value as a first step.

A1 mini limits that affect adhesion

• Bed temperature: the A1 mini’s maximum build plate temperature is 80 °C (A1 mini specs [3]). The full-size A1 reaches 100 °C (A1 specs [4]).
• Plates: the A1 mini lists the Textured PEI, Smooth PEI and Dual-Texture PEI plates as compatible (A1 mini specs [3]).
• Materials: Bambu Lab rates PLA, PETG, TPU and PVA as “Ideal” on the A1 mini and ABS, ASA, PC, PA, PET and fiber-reinforced filaments as “Not Recommended” (A1 mini specs [3]). If you are fighting adhesion with ABS or ASA on an open-frame A1 mini, the material may be the root cause.

What owners report

We read two public threads. That is a small sample, so treat these as examples:

• In the Bambu Lab forum thread First layer adhesion/infill issues [5] (9 posts, July 2024), an A1 mini owner using PLA Matte on the Textured PEI plate cleaned it with IPA between prints. Other forum members recommended dish soap and hot water instead of IPA, and one said that if you do use IPA you need to flood the plate, because letting it evaporate just spreads fingerprint oils around. One member suggested glue for PLA Matte. The owner also reported that slowing the initial layer to 15–20 mm/s fixed most of the problem.
• On Stack Exchange, Wrinkles/bubbles on first layer Bambu Labs A1 mini [6], the asker had already changed speed, temperatures, plates, filament and presets. The only answer reports that manually leveling the bed and lowering the first-layer speed further fixed it.

How we chose these steps

The first four steps come straight from Bambu Lab’s two first-layer guides, in the order they present them. The slow-first-layer step is owner advice from the two threads above and is labeled as such. The G-code change comes last because Bambu Lab calls it a temporary workaround that may create new defects. We left out third-party build surfaces and firmware changes, because we found no official guidance on them for the A1 mini.

Related guides

• AMS lite not loading filament: causes and fixes
• Bambu Lab printers: models, compatibility and common issues

Disclaimer

This page summarizes publicly available manufacturer documentation and owner reports. We did not perform these procedures on our own equipment. Let the hotend cool and switch the printer off before touching it, as Bambu Lab’s guide instructs. Disassembly can damage parts or affect your warranty; contact Bambu Lab support if you are unsure. Documentation and firmware change over time, so check the linked sources for the current version. Last verified: 2026-10-23.