Bambu Lab A1 Mini Settings (Tested Profiles)

The stock Bambu Studio profiles for the A1 Mini are good enough that most people never touch them. That is also the reason most A1 Mini prints look 80% as good as they could. The printer is capable of more than the defaults let you see, and the gap between "fine" and "genuinely great" is about fifteen slicer values and one afternoon of tuning.

I've been running an A1 Mini on the 3DSearch test bench since shortly after launch. It lives next to an X1C and a P1S, and it is the printer I actually reach for when I want something small done fast without babysitting it. At $219 to $299 for the base unit (or around $449 with the AMS Lite), it is the cheapest "real" printer Bambu sells and it punches hilariously above its price. 180x180x180 mm build volume, 500 mm/s on paper, direct drive extruder, automatic bed mesh, and a motion system that mostly keeps up with the hype.

This is the guide I wish I'd had when I started tuning mine. Concrete numbers, real filament behavior, and the specific settings that make the difference between a print you ship and a print you rerun.

What Most A1 Mini Guides Get Wrong

Almost every settings guide I've read for this printer has the same problem: they treat it like a mini X1C. It is not. The A1 Mini is an open-frame bedslinger with a smaller build plate and a different thermal envelope. The settings that work on an enclosed CoreXY are not automatically correct here.

Two things guides consistently get wrong:

Ludicrous mode is not a magic button. On paper the A1 Mini hits 500 mm/s. In practice, Ludicrous mode exists to impress your friends with a speed benchy, not to print anything you care about. Ringing shows up fast, corners get soft, and your surface finish degrades in ways that are hard to fix in post. Standard mode is where this printer actually lives.

Stock PETG settings are too hot and too cold at the same time. Bambu's default PETG profile runs the nozzle a little warm and the part fan a little cool, which trades stringing for weak layer adhesion. I run PETG lower and with slightly more fan, and parts come out stronger.

If a setting guide tells you to run the A1 Mini at 500 mm/s for "normal" prints, close the tab. That person is not printing parts they care about.

Bambu Studio Speed Modes: What They Actually Do

Before the per-filament numbers, understand the four speed modes. You can switch between them mid-print from the handy app, which is useful when you realize halfway through that the geometry is uglier than you thought.

• Silent runs the printer around 48 dB. It is slower, but the acceleration curve is gentle and surface quality is the best the machine can produce. This is my default for anything detailed.
• Standard is the sweet spot for 90% of prints. Balanced speed, clean surfaces, reliable overhangs.
• Sport picks up the pace without falling apart. Good for functional parts where surface finish matters less than throughput.
• Ludicrous is for bragging rights and simple geometry. Solid PLA blocks, organic shapes with no fine features. Do not use it for anything with text, threads, or mating surfaces.

The real insight: speed mode affects the outer wall speed most dramatically. If your model has clean surfaces you care about, drop the outer wall speed manually rather than picking a slower mode globally. You'll print the infill fast and the walls slow, which is almost always what you actually want.

PLA Settings That Hold Up

PLA is where the A1 Mini is at its best. The direct drive extruder has short, positive filament control, the motion system is clean enough to print 0.12 mm layers without feeling like a compromise, and the bed adhesion on textured PEI is borderline foolproof.

These are the numbers I run on my A1 Mini PLA profile:

Setting	Value
Nozzle Temperature	210-220°C
Bed Temperature	55-65°C (textured PEI at 55°C, smooth PEI at 60°C)
Print Speed (Standard)	200-300 mm/s
Outer Wall Speed	50-80 mm/s
Travel Speed	250-350 mm/s
Layer Height	0.2 mm standard, 0.12 mm for fine detail
Initial Layer Height	0.2 mm
Initial Layer Speed	50 mm/s
Infill Density	15-20% display, 40%+ functional
Infill Pattern	Gyroid or Cubic
Wall Count	2-3
Top/Bottom Layers	4
Retraction Distance	0.8 mm
Retraction Speed	30 mm/s
Cooling Fan	100% after first layer
Build Plate Adhesion	None on textured PEI

PLA tuning notes from actual prints

Bottom layer flow at 0.95 kills elephant's foot almost completely. This is the single most impactful change you can make if your prints look great from the side but have a slightly bulged base. The default 1.0 flow is fine on glass, but textured PEI has enough squish that you want to back off on the first layer.

Set the cooling overhang threshold to 25%. Default is higher and the fan ramps up too late, which is why stock profiles leave faint banding on steep overhangs. Drop it and the fan kicks on earlier. Clean 60 degree overhangs become routine.

Switch the wall generator from Classic to Arachne. Arachne handles variable-width walls intelligently, which matters on models with thin features. The default Classic generator will drop a wall entirely on a 0.6 mm feature where Arachne will widen the adjacent wall to fill the gap. On models with text, logos, or thin reinforcement ribs, this is night and day.

Different PLA brands need different temperatures, and this is not something you can hand-wave. Polymaker PolyTerra wants about 205°C on my machine. Bambu's own PLA Basic wants 215°C. Elegoo's PLA+ wants 220°C and a slightly slower outer wall. If you change brands and don't rerun a temp tower, you are printing blind. It takes fifteen minutes. Do it.

The stock PLA profile is one of the few slicer profiles in existence that I genuinely respect as a starting point. If you are new to this, print a benchy with stock settings, then read the rest of this section.

PETG Settings That Don't String

PETG is where most A1 Mini owners get frustrated. The stock profile strings, the first layer is inconsistent, and the part fan behavior makes layer adhesion feel unpredictable. None of this is the printer's fault. All of it is fixable.

Setting	Value
Nozzle Temperature	230-245°C (I start at 238°C)
Bed Temperature	70-80°C
Print Speed	100-200 mm/s
Outer Wall Speed	40-60 mm/s
Travel Speed	200-300 mm/s
Layer Height	0.2 mm
Initial Layer Height	0.2 mm
Initial Layer Speed	30 mm/s
Infill Density	20-40%
Infill Pattern	Gyroid
Wall Count	3-4
Top/Bottom Layers	5
Retraction Distance	0.8 mm
Retraction Speed	30 mm/s
Cooling Fan	30-60% (never 100%)
Build Plate Adhesion	Brim recommended
Z Hop	Enabled, 0.4 mm

The PETG rules that actually matter

Use glue stick on smooth PEI. PETG bonds to bare PEI hard enough to tear chunks out of the build plate when you remove a print. This is the single most expensive mistake I see new PETG users make. Even on textured PEI, a thin glue layer acts as a release agent and saves your plate over hundreds of prints. Three seconds of prep, indefinite plate life.

Drop the jerk to 35-40 mm/s if you see layer separation. The A1 Mini's stock 50 mm/s X/Y jerk is aggressive for PETG, especially on tall thin parts. Users on the Bambu Lab community forum have reported the same pattern: walls that look fine but peel apart under load. Lower jerk fixes it.

Keep the fan between 30% and 60%. This is the setting I see guides get wrong most often. 100% fan on PETG causes layer delamination because the material cools too fast to bond. 0% fan causes stringing and ugly overhangs. The correct answer is in the middle, and it depends on the brand. SUNLU PETG likes about 40%. Overture PETG handles 55% cleanly. Run a small cooling tower if you are serious about it.

Enable Z hop at 0.4 mm. PETG is stickier than PLA when molten and the nozzle will drag across surfaces otherwise, leaving scars that are impossible to sand out. Z hop adds a tiny bit of time per travel move. It is worth it. Every time.

Dry your filament. PETG is a moisture sponge and wet PETG prints look like static on an old TV. If your spool has been sitting open for more than a few weeks, run it through a dryer at 65°C for six hours before blaming your settings. Full PETG settings breakdown here.

TPU Settings for a Printer That Shouldn't Be This Good At TPU

The direct drive extruder is why the A1 Mini can print TPU at all. Bowden printers with flexible filament are a rite of passage in pain. The A1 Mini is not. Within reason, it just works.

Setting	Value
Nozzle Temperature	220-235°C (I start at 228°C)
Bed Temperature	50-60°C
Print Speed	20-30 mm/s
Outer Wall Speed	15-25 mm/s
Travel Speed	100-120 mm/s
Layer Height	0.2 mm
Initial Layer Height	0.2 mm
Initial Layer Speed	15 mm/s
Infill Density	10-25% (lower is more flexible)
Infill Pattern	Gyroid
Wall Count	3-4
Top/Bottom Layers	5
Retraction Distance	0 mm, or 0.5 mm max
Retraction Speed	20 mm/s
Cooling Fan	50-80%
Build Plate Adhesion	Brim

What nobody tells you about TPU on the A1 Mini

Slow is not optional. The difference between 25 mm/s and 40 mm/s is the difference between a clean print and a nozzle jam. I have tried to push this. It is not worth it. The feeder compresses flexible filament instead of pushing it through if you go too fast, and by the time you notice, you've already got a clog that will take twenty minutes to clear.

Turn retraction off, or keep it under 0.5 mm. TPU bulges in the gear when retracted and causes jams on the next extrusion move. Enable combing mode instead (set to "Within Infill") and accept that you'll have a tiny bit of stringing on the outer surfaces. You can trim it with a hot knife in thirty seconds.

Keep the filament path as straight as possible. Use the top spool holder, not a side holder that forces the filament around a sharp bend. TPU buckles under lateral load, and the A1 Mini's extruder is not strong enough to recover from a buckle mid-print.

Shore hardness matters more than you think. 95A TPU is forgiving and prints like stiff PETG. 85A is actually flexible and much harder to print. Start with a 95A from a known brand (SUNLU, Overture, or Bambu's own) before trying anything softer. The A1 Mini TPU profile page has brand-specific temps.

Smooth PEI with glue stick beats textured PEI for TPU. The flex of TPU can lift textured PEI's peaks on removal. Smooth plate with a thin glue layer gives you better adhesion and a cleaner bottom face.

ABS and ASA: Don't

The A1 Mini is open-frame with a max bed of 80°C. Bambu's own filament compatibility guide does not list ABS or ASA as supported, and there is a real reason: these materials want 95-110°C beds and a warm enclosed chamber to prevent warping and delamination. You can technically extrude ABS on the A1 Mini. You cannot reliably print a functional ABS part on it. Layers will split, corners will lift, and you will be sad.

If you need ABS or ASA, the Bambu Lab P1S is the cheapest printer in the Bambu lineup that will do it properly. For ASA specifically, I wrote a full guide on tuning ASA that covers the chamber and bed conditions you actually need. Save yourself the weekend of frustration.

Common Mistakes and Exact Fixes

These are the problems I see over and over in the 3DSearch support inbox and on Reddit, with the actual fixes that work.

Stringing between parts

Stringing is noise, not signal. It almost always means one of two things: wet filament, or slightly-too-hot nozzle. In order of likelihood:

1. Drop nozzle temp 5°C and reprint a stringing test. If it gets better, keep going down 5°C at a time until it gets worse, then go back up one step.
2. Increase travel speed to 300+ mm/s so the nozzle clears the gap faster.
3. Enable Z hop at 0.4 mm.
4. Enable combing mode (Within Infill).
5. For PLA specifically, bump retraction to 1.0 mm. Only for PLA. Do not do this for PETG or TPU.
6. Dry your filament. If none of the above helped, it's moisture.

My full stringing troubleshooting guide walks through each step with pictures.

First layer not sticking

Clean the bed with isopropyl alcohol before every print. Not every ten prints. Every print. Fingerprints and dust build up faster than you think, and the A1 Mini's auto-leveling does nothing about surface contamination.

Re-run the full auto calibration when you switch filament types, move the printer, or if the first layer starts looking off. It is a three-minute process and it catches bed offsets that would otherwise ruin the print.

Increase bed temperature 5°C and drop first layer speed to 30 mm/s. These two changes fix 80% of first layer issues. If you're still getting lift on small footprints, add a brim.

Ringing or ghosting on walls

Visible echoes next to sharp corners are almost always speed. Drop outer wall speed to 50 mm/s and leave the rest of the print fast. The A1 Mini's input shaper is good but not magic, and the bedslinger Y axis has more mass than a CoreXY so fast Y moves ring more.

Also: put the printer on something stable. A wobbly IKEA desk will ruin prints no amount of slicer tuning can save. A concrete paver under the printer is the cheapest upgrade you can make. Ten dollars, zero ghosting.

Layer separation (delamination)

Bump nozzle temp 5-10°C. Drop fan speed, especially for PETG and TPU. Do a cold pull to clear a partial clog if the symptoms came on suddenly. Dry the filament. If all four fail, check that the filament spool is not jammed on its holder and creating extra tension.

Unpopular Opinion: The Stock Textured PEI Is Not the Best Plate

Bambu ships the A1 Mini with a textured PEI plate and it is perfectly fine for 90% of what you'll print. But for PETG and TPU, a smooth PEI plate with glue stick is actually better. You get a mirror-finish bottom face, stronger release control (thanks to the glue), and no risk of tearing the textured coating on stubborn PETG.

I keep a smooth plate on hand specifically for those two materials. The textured one stays on for PLA. Swapping takes ten seconds.

When NOT to Buy the A1 Mini

The A1 Mini is not the right printer for everyone. Skip it if:

• You need to print ABS, ASA, PC, or carbon fiber composites. The open frame and 80°C bed cap will fail you. Look at the P1S or X1C instead.
• You print larger than 180 mm in any dimension regularly. The build volume is the obvious limit here and splitting prints gets old fast.
• You want a silent printer. The A1 Mini in Standard or faster modes is not quiet. Silent mode helps but costs you time.
• You want a multi-color setup for serious volume. The AMS Lite works, but it is visibly the budget option compared to the full AMS on X1C and P1S. Four colors, more purge waste per swap.

For anyone else, especially if this is a first printer, it is the best $219-$299 you can spend in 3D printing right now. Full stop.

Quick Reference

	PLA	PETG	TPU
Nozzle	210-220°C	230-245°C	220-235°C
Bed	55-65°C	70-80°C	50-60°C
Speed	200-300 mm/s	100-200 mm/s	20-30 mm/s
Fan	100%	30-60%	50-80%
Retraction	0.8 mm	0.8 mm	0-0.5 mm
Difficulty	Easy	Medium	Hard

Get Model-Specific Settings

Universal settings get you most of the way there. The last 10% depends on the specific model you're printing. A benchy has different needs than a vase, which has different needs than a gear. If you want settings tuned for a particular model on your A1 Mini, use the AI Settings feature on 3DSearch. Find the model, click AI Settings, pick A1 Mini and your filament, and you get a profile adapted to that model's geometry, overhangs, and structural needs.

For the full per-filament deep dives, the A1 Mini settings hub has every profile in one place. And if you're shopping for filament, I keep a running list of the best filament brands for 2026 based on what actually runs clean on our test bench.

The A1 Mini is the printer that convinced me Bambu deserves its reputation. Tune it once, and it will quietly outperform machines that cost three times as much. That is not hype. That is what is sitting on my desk printing as I write this.