Best Filament for the A1 (2026): PLA, PETG & TPU

Best Filament for the A1 (2026): PLA, PETG & TPU Picks

The A1 and A1 Mini are Cartesian bed-slingers with AMS Lite bolted on the side. That open-air spool holder makes the filament path more forgiving than an enclosed printer, until you feed it something soft, abrasive, or damp. Then AMS Lite turns into the weakest link in the machine.

This is a filament shortlist, not another A1 review. We picked based on three things: whether the spool actually cycles through AMS Lite without jamming, whether your slicer ships a tuned profile (or one worth building), and whether the print quality holds up when you push the A1 past 200 mm/s. Every recommendation below has been on our A1 or a customer's, not just skimmed off a spec sheet.

The short answer

Best PLA overall: PLA Basic (RFID) — auto-config in the slicer, zero setup.
Best value PLA: Forgely Performance PLA — US-extruded, tight tolerance, cheaper per kg.
Best PETG: PETG HF — prints as fast as PLA if you keep it dry.
Best TPU: TPU 95A — bypass AMS Lite entirely, feed direct.

What the A1 and A1 Mini actually need from a filament

AMS Lite quirks (vs. the enclosed AMS)

AMS Lite is four external motorized spool holders, not a sealed box. There is no dehumidification. There is no filament runout sensor in a sealed chamber to catch a soft strand deforming under load. The manufacturer's own docs call out three things it can't handle safely: TPU softer than 95A (jams the drive gears), carbon-fiber blends (chew the PTFE-lined path), and PETG that has been sitting open in humid air for more than a few days (pops and jams at the extruder).

If you print outside those lanes, AMS Lite is reliable. Push into them, and you'll spend more time clearing tangles than printing.

Bed and hotend limits

Stock, you get a textured PEI plate, a 100°C bed, and a 300°C hotend on a 0.4 mm nozzle. That's plenty for PLA, PETG, and TPU. It's not enough for PC or nylon, and it's marginal for ASA even with a draft shield. If you want more headroom, the high-flow 0.4 mm hotend unlocks the top end of PETG HF and gives you real 300+ mm/s on standard PLA.

The 500 mm/s reality check

The A1 is marketed with a 500 mm/s ceiling. That number assumes a high-flow filament formulated for it. Standard PLA under-extrudes around 200–250 mm/s no matter how tight your profile is; you'll see gaps in top layers and glassy under-extruded walls. Match the filament to the speed you actually want, not the box quote.

Best PLA for the A1

PLA Basic — the safe default

The reason to spend the extra dollars is boring and correct: scan the RFID tag, the slicer loads the profile, AMS Lite handles it cleanly, done. Nozzle 220°C, bed 55°C, cap speed around 250 mm/s. First-layer adhesion on textured PEI is effectively hands-off. If you're new to the A1, buy one spool of this before anything else so you have a known-good baseline to compare against. PLA Basic.

PLA Matte — for display prints

No layer-line shine, hides ringing, photographs well. Trade-off: noticeably more brittle than Basic. If the part is functional, bump to four walls and 20%+ gyroid infill or use a different filament. PLA Matte.

Forgely Performance PLA — US-made value pick

We extrude this in Utah with a ±0.02 mm diameter tolerance, which matters more than the marketing suggests: loose-tolerance PLA is what makes AMS Lite skip and grind at high speeds. Custom profile in the slicer: 210°C nozzle, 55°C bed, 220 mm/s max, 0.2 mm layers. Refill spools are available for anyone tired of tossing a cardboard core every kilo. Forgely Performance PLA — solid colors and refills.

Eryone High Speed PLA — when you actually want 500 mm/s

Formulated for high-flow, and it holds up. Pair with 0.28 mm layers and the high-flow hotend if you have it. Not our first pick for detailed models (surface finish is a hair rougher than PLA Basic) but for functional prints that need to come off the plate fast, it earns its slot. Eryone High Speed PLA.

PLA Silk and Galaxy — cosmetic upgrades

Both cycle through AMS Lite fine. Silk is stringier at the default 220°C; drop to 210°C and turn coasting on. Galaxy sparkle particles are abrasive over time — fine for a couple of spools, watch the nozzle if it becomes your daily driver. PLA Silk, PLA Galaxy.

Best PETG for the A1

PETG HF — the reason to buy PETG for this printer

Standard PETG on an A1 tops out around 80–100 mm/s before it starts under-extruding and stringing. PETG HF prints at PLA speeds; we've held 200 mm/s on cosmetic prints without visible defects. Nozzle 260°C, bed 70°C. PETG HF.

One caveat that matters more here than on any other machine in this family: PETG is hygroscopic, AMS Lite offers zero moisture protection, and wet PETG on this printer is what most "my A1 hates PETG" posts on Reddit actually are. Store the spool in a dry box between prints. Dry it if it's been open more than a week.

PETG Basic — for occasional use

Slower profile, more forgiving overall, and cheaper. If PETG is a once-a-month thing for you, this is the right choice. Same drying rules apply. PETG Basic.

Eryone PETG — budget-friendly workhorse

Custom profile in the slicer: 240°C nozzle, 70°C bed, 200 mm/s max. Layer adhesion is solid; we've used it for outdoor brackets that have held up two summers. Eryone PETG.

Drying is non-negotiable

A FilaDryer E2 keeps PETG below 15% RH between uses and doubles as an active dry-while-printing box. Skip this and you'll blame the printer for what is actually water in your spool.

Best TPU for the A1 (skip the AMS Lite)

Read this first: AMS Lite is not rated for TPU. The drive gears grip the filament hard enough that anything softer than 95A deforms mid-feed and jams the path. Even 95A cycles through unreliably at best. Feed TPU direct from the external spool holder into the toolhead. Every time.

With that out of the way: TPU 95A prints cleanly on the A1 at 230°C nozzle, 50°C bed, 30 mm/s cap, retraction off (or at most 0.4 mm). Turn ironing off, drop acceleration to 1000 mm/s², and give it a brim on textured PEI.

Softer TPUs (85A, 90A) are a bad idea on the A1 full stop. The extruder is short-Bowden-adjacent and the drive path has enough slack for soft filament to buckle. Stick with 95A. If you need softer, that's what a direct-drive printer with a constrained path is for. Eryone TPU is a solid 95A alternative if the first pick is out of stock.

Filaments to avoid on the A1

PET-CF and other carbon-fiber blends — abrade the PTFE-lined extruder path and stock brass nozzle within a spool or two. Needs a hardened steel nozzle and hardened drive gears. Upgrade to an enclosed printer with a hardened toolhead first.
ABS and ASA — no enclosure means warping and delamination on anything larger than a phone case. Also: ABS off-gasses styrene. Ventilate or don't print it indoors.
PC — needs a 300°C hotend running near its max and a heated chamber. The A1 has neither.

None of these are the filament's fault. They're a printer mismatch. Match the machine.

Settings cheat sheet (copy-paste into your slicer)

Filament	Nozzle °C	Bed °C	Max Speed	AMS Lite?	Notes
PLA Basic	220	55	250 mm/s	Yes	RFID auto-config
PLA Matte	220	55	200 mm/s	Yes	4 walls for functional parts
Forgely Performance PLA	210	55	220 mm/s	Yes	Manual profile, ±0.02 mm
Eryone High Speed PLA	215	55	500 mm/s	Yes	Pair with high-flow hotend
PETG HF	260	70	250 mm/s	Yes, if dry	Store in dry box
PETG Basic	250	70	100 mm/s	Yes, if dry	Slower profile
Eryone PETG	240	70	200 mm/s	Yes, if dry	Custom profile
TPU 95A	230	50	30 mm/s	No — direct feed	Retraction off

First-layer and bed-adhesion tips specific to the A1

Textured PEI needs almost no help with PLA. Wipe the plate with isopropyl every few prints and skip the glue stick.

PETG on textured PEI is the opposite problem: it bonds so well it can rip chunks of PEI off the plate. Two fixes. Either switch to the smooth side of a dual-sided plate (add a light glue-stick coat as a release layer), or run BIQU Cryogrip Frostbite — cools past release temp and the part pops off without prying. The smooth/textured A1 Mini plate is worth having for exactly this reason if you print both PLA and PETG.

Auto-bed-level assumes the plate itself is flat. A warped plate (from over-heating, or from prying prints with a metal scraper) will produce a first layer that looks tuned in one corner and squished in another. If the mesh visualization looks like a saddle, replace the plate before you spend an afternoon tweaking Z-offset.

Stock the A1 with Utah-extruded PLA

If a value pick fits your workflow, Forgely Performance PLA — solid colors ships in two days from the US and holds the tolerance AMS Lite wants. For AMS Lite users tired of tossing a cardboard core every kilo, the translucent refills run on the same spool you already own — Bambu AMS compatible, no core waste.

Best Filament for the A1 (2026): PLA, PETG & TPU