Enclosures
How to print ABS on a Bambu Lab printer
Most ABS failures are one of four things, and three of them are free to fix. Settings come after the sequence.
By Michael W. · Published October 5, 2026
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Work through this before changing any setting
- Dry the filament. ABS absorbs moisture and wet ABS gives you a rough surface, weak layers and popping from the nozzle.
- Pre-heat the chamber. Run the bed at temperature with the door shut for 15-20 minutes before starting. A print that begins in a cold chamber warps in the first layers and never recovers.
- Clean the plate with soap and hot water. Not alcohol, which smears skin oils around rather than removing them.
- Turn part cooling DOWN. This is the counterintuitive one and it causes most layer splitting.
Three of those four cost nothing. Do them before adjusting a single slicer value.
Why part cooling has to come down
ABS contracts measurably as it cools. If a layer is chilled by a fan before the next layer lands on it, the bond between them is weak and the contraction pulls them apart — which is layer splitting. The same fan that rescued your PLA overhangs is causing it.
So if you have fitted an auxiliary fan or a better duct, your ABS profile needs its own much lower cooling setting. This is the most common configuration mistake on an enclosed machine, because people treat cooling as a universally good thing.
Chamber warm-up, which is the free fix nobody does
A P1S chamber is passive. The bed warms the air and the panels keep it in, so the chamber only becomes useful after the bed has been hot for a while. Start a print immediately and the first twenty layers go down into cool air. Those are the layers that lift at the corners.
Fifteen to twenty minutes of bed-at-temperature with the door closed before you press print solves a surprising share of ABS failures, and it costs nothing but patience. Chamber temperature in detail.
Bed adhesion for ABS specifically
ABS wants a hot bed and a genuinely clean surface. Two specifics that matter more here than with PLA:
- Wash the plate with dish soap and hot water. Isopropyl alcohol tends to redistribute skin oils rather than remove them, and ABS is far less forgiving of a contaminated plate than PLA is. Adhesion troubleshooting.
- Use a textured plate, and consider a brim. Textured PEI grips harder than smooth, and a brim gives the part more area to hold the corners down — which is where ABS lifts first.
Settings, in the order they matter
| Setting | Direction | Why |
|---|---|---|
| Part cooling fan | Much lower than PLA | Chilled layers split. The single biggest lever. |
| Chamber pre-heat | 15-20 minutes before printing | Cold chamber warps the first layers. |
| Bed temperature | Hot, per the filament profile | Holds the corners down against contraction. |
| Filament dryness | Dried before printing | Wet ABS is rough and weak on top of warping. |
| Brim | Add one on tall or thin parts | More area resisting corner lift. |
| Print speed | Moderate rather than maximum | Slower layers bond better; this is not a speed material. |
| Nozzle temperature | Per profile | Rarely the problem, and the setting people change first. |
On an A1 or A1 mini
Everything above still applies and the ceiling is lower. Without an enclosure, warm air around the part does not exist, so small parts are achievable and tall parts are not.
A fabric enclosure with a flame-retardant lining moves the line usefully and does not erase it — A1 enclosures. If ABS matters to you more than occasionally, an enclosed machine is the honest answer rather than a better tent.
If it still fails
Go to warping diagnosis, which separates corner lift from layer splitting — they have different causes and the fixes are almost opposite. And if you are deciding between ABS and ASA for the part, that comparison is a one-question decision.
What to buy
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1. Minimum machine for ABS
Bambu Lab P1S
Enclosed with an auxiliary fan and air filter, which is the floor for this material.
ABS needs an enclosure. The P1S is the cheapest machine in the range that has one as standard, along with the auxiliary cooling fan and air filter that came with it.
Listed because "how do I print ABS" sometimes has the answer "on a different machine". On an open-frame A1 the technique below helps and does not fully solve it.
What it gets right
- The enclosure plus auxiliary fan is what makes ABS and ASA realistic rather than aspirational
- Still the best-supported machine in the range for third-party upgrades — screens, hotends, plates, ducts
- Fast enough that the P2S's speed gain is not the reason to replace it
What it does not
- No touchscreen as shipped, which is why the Panda Touch exists
- No quick-swap nozzle: a nozzle change is a hotend job, not a 30-second one
- Passive chamber only — it holds heat, it does not make heat
| Released | July 13, 2023 |
|---|---|
| Type | Enclosed CoreXY |
| Over the P1P | Enclosure, auxiliary cooling fan and air filter |
| Multi-color | AMS and AMS 2 Pro (4 spools, expandable) |
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2. Best if ABS is central
Bambu Lab X2D
A reported 65 C actively heated chamber, which removes the variable this guide spends most of its words on.
If you print ABS or ASA constantly and tall parts keep splitting, the honest answer is that a passive chamber is the limitation. An actively heated chamber holds a temperature rather than settling at one.
A real purchase for a real problem, and overkill for anyone whose ABS mostly works already.
What it gets right
- Dual nozzle without stepping up to the H2 footprint — two materials on a desk-sized machine
- A reported 65 C heated chamber is a real capability jump over any passive P-series enclosure
- Newest filtration and thermal hardware in the smaller form factor
What it does not
- Released April 2026, so third-party part support is thin compared with the P1S
- Same reported 256 mm build volume as a P1S — this is a capability upgrade, not a size one
- I have not run one. What follows anywhere on this site about the X2D is specification and reasoning, not observation
| Released | April 14, 2026 |
|---|---|
| Type | Enclosed CoreXY, dual nozzle |
| Improvements cited | Air filtration, thermal management and speed |
| Build volume (reported) | 256 mm cube |
| Chamber (reported) | Heated to 65 C |
Questions people actually ask
What settings do I need to print ABS on a P1S?
In priority order: part cooling much lower than for PLA, a chamber pre-heated for 15-20 minutes with the door shut, a hot bed, dried filament and a brim on tall parts. Nozzle temperature is the setting people change first and it is rarely the problem.
Why does my ABS warp even in an enclosed printer?
Four usual causes: the filament is wet, the chamber had not warmed up before the print started, the first layer was not properly adhered to a clean plate, or part cooling is too high. All four are free to fix, and the last one catches people who added a cooling fan to improve PLA overhangs.
Should I turn the fan off completely for ABS?
Turn it down substantially rather than off. Some airflow is needed for bridges and sharp overhangs, but ABS splits between layers when each one is chilled before the next bonds to it. Start from your filament profile's ABS preset rather than your PLA settings.
Can I print ABS on an A1?
Small parts, with an enclosure and the technique above. Tall parts, not reliably - there is no warm chamber, so the lower layers cool while the upper ones print. If ABS is more than occasional for you, an enclosed machine is the right purchase rather than a better enclosure.
How long should I pre-heat the chamber before printing ABS?
Fifteen to twenty minutes with the bed at temperature and the door closed. A passive chamber only becomes useful once the bed has been hot for a while, and starting immediately means the first layers go down into cool air - which is exactly where corner lift begins.
Sources
- Bambu Lab model descriptions, including the P1S enclosure and X2D - Wikipedia
- Reported chamber temperatures and build volumes - third-party lineup roundups captured October 2026
Read this next
- Why your prints keep warpingHow to distinguish corner lift from layer splitting, and the four causes behind warping with the cheapest fixes first.
- ABS vs ASA on a Bambu Lab printerABS and ASA need the same things from a printer and differ in UV stability. Which to use, and what both demand from your setup.
- Chamber temperature on a passive enclosureHow passive chamber heating works, the safe ways to raise it, the modifications to avoid, and when an actively heated machine is the real answer.
- When prints will not stick to the plateAdhesion failures in diagnostic order, starting with the free fix that resolves most of them, and the material-specific exceptions.
- How to dry filamentFour drying methods compared, the temperature each material wants, and the one method that does not work despite being widely suggested.
- The best Bambu Lab printer for ASAWhich machines handle ASA and ABS, why passive and active chambers differ, and the free technique to try before buying.