Bambu Lab AMS
TPU, Carbon Fiber Nylon and Wood PLA: AMS Slot or External Spool?
Whether a spool can go in your AMS depends on the exact filament, down to the product name, and on which AMS unit you have. This page sets out what Bambu Lab's own pages say for TPU, carbon fiber nylon, wood PLA and the other filaments its AMS guides flag, including where those pages disagree, so you can choose between an AMS slot and the external spool.
The short answer
No AMS unit's automatic feed takes TPU rated 95A or softer. Carbon fiber nylon depends on the exact product. Wood PLA is listed for the full-size units; for the AMS lite, Bambu's pages disagree.
- TPU 95A, 90A, 85A: Bambu lists the AMS, AMS 2 Pro and AMS lite as not compatible. An AMS HT can hold the spool as a sealed box, but you push the TPU by hand through a separate outlet on its back. The exception is Bambu's TPU for AMS, rated Shore 68D, which is listed for every AMS unit.
- Carbon fiber nylon: Bambu PAHT-CF's store page lists the AMS, AMS 2 Pro and AMS HT, not the AMS lite. Bambu's PA6-CF page lists no AMS unit as compatible. Bambu's AMS notes say to avoid other brands' fiber-reinforced filament. A nylon spool fed from outside the AMS still needs a sealed box with desiccant.
- Wood PLA: Bambu PLA Wood's store page lists every AMS unit as compatible. Bambu's filament guide lists wood PLA for the AMS, warns that some brands are brittle enough to break in the feed channel, and gives two different answers for the AMS lite.
Which unit you have changes the answer
Bambu's connection guide describes the AMS, AMS 2 Pro and AMS HT as sharing a two-stage feed: a feeder pushes filament to an assist motor, which drives it on to the toolhead. The AMS lite has one stage, and once printing starts only the extruder pulls the filament. Bambu's filament guide says the AMS has an extra transmission gear that adds feeding force, enough for some softer or rougher filaments, and that the AMS lite lacks it. Bambu's wiki also files its Notes on the AMS under the AMS 2 Pro and the AMS HT.
The AMS lite works only with A series printers, but not every A series printer uses one. With firmware 01.07.00.00 or later, an A1 series printer can run an AMS, AMS 2 Pro or AMS HT through the A Series AMS Hub, and an A2L can run AMS units and an AMS lite at once. Go by the unit the spool sits in.
| Filament | AMS, AMS 2 Pro, AMS HT | AMS lite |
|---|---|---|
| TPU 95A, 90A, 85A | Not compatible; an AMS HT can hold the spool as a sealed box, fed by hand through its rear TPU outlet | Not compatible |
| Bambu TPU for AMS (68D) | Compatible | Compatible |
| Other TPU rated 55D or harder | Not compatible; only TPU for AMS is listed for the automatic feed | Pages disagree |
| TPE | Avoid | Avoid |
| Bambu PAHT-CF | Compatible | Pages disagree; its store page says not compatible |
| Bambu PA6-CF | Not compatible | Not compatible |
| Other brands' PA-CF/GF, PAHT-CF/GF, PLA-CF/GF | Avoid | Avoid |
| PET-CF/GF (including Bambu PET-CF), PPA-CF/GF, PPS-CF/GF | Not compatible | Not compatible |
| Bambu PLA-CF | Compatible | Compatible |
| Bambu PETG-CF | Compatible | Pages disagree; its store page says not compatible |
| Other brands' PETG-CF | Pages disagree | Avoid |
| Bambu PLA Wood | Compatible | Pages disagree; its store page says compatible |
| Other brands' wood PLA | Compatible; some brands too brittle | Pages disagree |
| PLA Glow | Compatible; wears the tubes faster | Not recommended; Bambu PLA Glow's page says not compatible |
| ABS, ABS-GF | Compatible | Not recommended |
| PVA, BVOH | Only when dry | Only when dry |
TPU: read the hardness number and its letter
Bambu's TPU guide ranks hardness from 77D, through 68D and 55D, down to 95A, 90A, 85A and softer. D is the harder scale, and a higher number means harder and less flexible. The AMS lite FAQ draws its line on that scale: 55D or harder can be used, 95A or softer cannot. The TPU guide lists one TPU for the automatic feed of every AMS unit: Bambu's TPU for AMS. The filament guide's table has a single TPU row, marked not compatible, with no separate entry for TPU for AMS.
So for the AMS, AMS 2 Pro and AMS HT, TPU for AMS is the one grade Bambu lists for a flexible part printed from an AMS slot. At 68D it is harder than every A-scale grade in that ranking, so if the part needs the give of 95A or 85A, that spool cannot use an AMS slot's automatic feed. Choosing filament by requirement covers that trade-off.
For softer TPU, Bambu's guides use a sealed dry box beside the printer or the AMS HT's rear TPU outlet, with the spool raised above the toolhead inlet. By printer:
- A1 series: 85A is not supported. For 90A, remove one PTFE tube at the toolhead, feed the filament straight into the extruder inlet, and unload it by hand; the cutter cannot unload it.
- P series: for 85A, remove the glass cover plate first, then load the filament into the extruder from above, not through a PTFE tube. 90A can run through a PTFE tube from the dry box. Both unload by hand, not with the cutter.
- X1, H2, A2L and X2D: Bambu's TPU Printing Guide links a separate loading tutorial for each series. The same guide describes a TPU Feed Assist Module for H, X and P series printers, an upgrade that lets TPU feed through a dedicated inlet.
- Any Bambu printer: TPU softer than 85A is not currently supported.
- AMS HT: using the TPU outlet means no automatic feed or return, and no drying while printing that way.
- Nozzle for 85A: Bambu's TPU Printing Guide and its P series TPU guide list 0.6 and 0.8 mm nozzles and the TPU high-flow hotend as compatible, and 0.4 mm as not compatible. The nozzle table in the general filament guide lists 0.4 mm as compatible. A 0.6 or 0.8 mm nozzle is the size all three pages accept. See nozzle sizes.
Carbon fiber nylon: check the product, not the brand
A Bambu label is not enough. The PAHT-CF store page lists the AMS, AMS 2 Pro and AMS HT as compatible and the AMS lite as not, and says it needs an enclosed printer. The PA6-CF page lists every AMS unit as not compatible. The filament guide still names Bambu PA-CF as compatible, but PA-CF was discontinued; the PAHT-CF page calls PAHT-CF its upgraded version.
For other brands, Bambu's AMS notes say to avoid third-party fiber-reinforced filament, including PA-CF/GF, because it can wear the PTFE tubes and break in the feed path. The filament guide flags certain brands as too brittle or too rough but does not name them, so there is no list to check a spool against.
A nylon spool that stays out of the AMS still needs protection from moisture. Bambu's filament guide marks desiccant protection during printing as required for carbon and glass fiber nylon. Bambu calls PA6-CF highly moisture-absorbent and PAHT-CF highly sensitive to humidity. So these spools feed from a sealed box with desiccant, not an open spool holder. Drying temperatures by method covers drying them first.
On an open-frame printer such as an A1 or P1P there is a second problem: Bambu's filament guide lists carbon and glass fiber nylons as not recommended there, and the PAHT-CF page calls PAHT-CF unsuitable for open-frame printers. That limits the AMS lite too. The filament guide's table lists Bambu PAHT-CF as compatible under a combined AMS / AMS lite heading, while its store page says the AMS lite is not compatible. Either way, the AMS lite works only with A series printers, which the filament guide classes as open-frame. Whether your printer can run a filament covers enclosure and nozzle needs.
Wood PLA: listed for the full-size units, disputed for the AMS lite
For the AMS, AMS 2 Pro and AMS HT, Bambu PLA Wood is listed as compatible on its store page, and the filament guide's table lists PLA Metal / Wood / Marble as compatible. That covers other brands' wood PLA too, subject to the guide's warning that certain brands, which it does not name, are brittle enough to break in the feed channel.
For the AMS lite, Bambu's pages give different answers. The PLA Wood store page lists all AMS units as compatible. The filament guide's text lists PLA Wood as not recommended for the AMS lite, but the same guide's table lists it as compatible under one combined AMS / AMS lite heading. The AMS lite FAQ does not mention wood PLA, but it sends too-brittle filament to the external spool. So the external spool is the one route none of these pages argues against.
Dry it first either way. The PLA Wood page says wood powder makes it more sensitive to moisture, and Bambu's AMS 2 Pro guide says filament that has absorbed too much moisture turns brittle and snaps more easily in the feed path.
Where Bambu's own pages disagree
- Wood PLA in the AMS lite: the filament guide's text says not recommended, and its table says compatible. The PLA Wood store page lists every AMS unit.
- Bambu PETG-CF in the AMS lite: its store page says not compatible and the filament guide says not recommended. The AMS lite FAQ lists it as compatible.
- Other brands' PETG-CF in the AMS, AMS 2 Pro or AMS HT: the filament guide lists PETG-CF as compatible without naming a brand. Bambu's AMS notes say to avoid third-party fiber-reinforced filament.
- Bambu PAHT-CF in the AMS lite: the filament guide's table lists it as compatible under a combined AMS / AMS lite heading. Its store page says not compatible.
- Other TPU rated 55D or harder in the AMS lite: the AMS lite FAQ says it can be used. The TPU guide lists only TPU for AMS.
- TPU for AMS: the filament guide's table has one TPU row, marked not compatible, and no entry for TPU for AMS. The TPU guide and the TPU for AMS store page list it for every AMS unit.
- TPU 85A on a 0.4 mm nozzle: the TPU Printing Guide and the P series TPU guide say not compatible. The filament guide's nozzle table says compatible.
In each case one route avoids the question. For a spool, that is feeding it from outside the AMS, from a sealed box where the filament needs one. For TPU 85A, it is a 0.6 or 0.8 mm nozzle.
Compatible is not the same as wear-free
Bambu's compatibility table covers loading and unloading only. Its filament guide warns that abrasive filament, naming carbon fiber and glow, can grind down the AMS's internal PTFE feed channels over time, even after loading cleanly. Bambu's own PLA Glow page lists the AMS, AMS 2 Pro and AMS HT as compatible but says it can wear them faster. The tubes are replaceable, and Bambu's maintenance pages give intervals by time, not by kilograms:
- AMS (first generation): every two months; monthly, or whenever wear shows, with carbon fiber or glow filament. The printer reminds you to check them every two months.
- AMS lite: every two months; monthly for round-the-clock printing; promptly if they look worn.
- AMS 2 Pro: no fixed interval; replace on feeding errors, loading resistance, or after extended heavy use with abrasive or composite filament.
- AMS HT: the Bambu pages cited on this page give no interval. Its wiki index lists a separate guide to replacing the PTFE tube inside it.
Replacement tubes are 2.5 mm inside and 4 mm outside diameter; Bambu advises against other sizes. Lengths depend on the unit and the printer. Bambu's PTFE wear guide gives the first-generation AMS lengths: two 195 mm and two 230 mm tubes inside, plus 550 mm and 370 mm tubes at the output. The AMS lite FAQ lists two 730 mm and two 850 mm tubes for the A1, and two 580 mm and two 700 mm for the A1 mini. The AMS 2 Pro and AMS HT each have their own tube replacement guide on Bambu's wiki.
What to check on your own setup
- Which unit the spool sits in: an AMS lite, or an AMS, AMS 2 Pro or AMS HT.
- For Bambu filament, the Cautions for Use list on its store page. The pages for TPU for AMS, PAHT-CF, PA6-CF, PET-CF, PETG-CF, PLA-CF, PLA Glow and PLA Wood each state AMS compatibility there, and several name the AMS lite separately.
- For TPU, the hardness number and its letter, A or D.
- For another brand's spool, whether it is fiber-reinforced. Bambu's AMS notes say to avoid third-party fiber-reinforced filament in the AMS.
- Whether the spool is dry. Bambu lists damp PVA and BVOH as too soft to feed, and describes both its carbon fiber nylons as moisture-sensitive.
- For nylon, whether your printer is enclosed and whether the spool can sit in a sealed box with desiccant while it prints.
- When the PTFE tubes were last changed, if abrasive filament has run through them.
- Whether the spool fits the unit at all: spool sizes for each AMS unit.
Check it on your own equipment
These take you to the manufacturers and standards bodies the page draws on, so you can look up your exact model.
- Official support page
Bambu Lab filament guide: AMS & AMS lite section (opens in a new tab)Section 3, 'AMS & AMS lite': Bambu's three failure types (too soft, too brittle, too hard and rough), the filaments listed for the AMS but not the AMS lite, a warning about long-term PTFE wear, and a table by filament type. The table splits the AMS and AMS lite only on some rows, and it lists PLA Metal / Wood / Marble as compatible for both, although the text above it lists PLA Wood as not recommended for the AMS lite. — wiki.bambulab.com - Official support page
Bambu Lab TPU Printing Guide (opens in a new tab)Which AMS unit can hold standard TPU (only the AMS HT, as a sealed box with a rear outlet you feed by hand), that TPU for AMS feeds from every AMS unit, Bambu's Shore hardness order, which TPU grades each printer series supports, a nozzle table for each grade, the TPU Feed Assist Module for H, X and P series printers, and a loading tutorial for each printer series. — wiki.bambulab.com - Official support page
Bambu Lab AMS lite FAQ (opens in a new tab)The AMS lite's TPU hardness line (55D or harder), its position on carbon and glass fiber filaments with Bambu PLA-CF and PETG-CF named as compatible, the filaments it sends to the external spool, and PTFE tube lengths for the A1 and A1 mini. — wiki.bambulab.com - Official support page
PTFE Tube Wear in AMS and Maintenance Recommendations (first-generation AMS) (opens in a new tab)For the first-generation AMS: replacement intervals (every two months, monthly with carbon fiber or glow filament), the 2.5 mm by 4 mm tube size, this unit's tube lengths, and step-by-step replacement for the feeder, hub and output tubes. The AMS 2 Pro and AMS HT have their own replacement guides. — wiki.bambulab.com
What this page does not tell you
- Bambu's filament guide gives answers for the AMS and AMS lite only. The AMS 2 Pro and AMS HT entries here follow Bambu's grouping of the three full-size units and the store pages that name all three.
- Where Bambu's own pages give different answers, this page shows each one rather than choosing between them. Feeding the spool from outside the AMS is the route none of them argues against.
- Bambu does not name the brands it calls too brittle or too rough, so this page cannot say whether a particular brand is one of them.
- Bambu's PTFE tube intervals are by time, not by how much abrasive filament has run through. The Bambu pages cited here give no wear rate per kilogram and no interval for the AMS HT; check the AMS HT's own PTFE tube guide on Bambu's wiki.
- Bambu revises its wiki and store pages. The answers here reflect those pages as of September 2026, so for a Bambu spool, check the Cautions for Use list on its store page before loading it.
Sources
24 documents, each with the facts on this page it supports. Manufacturers revise specifications, so every source is dated — open it before you buy.
- No AMS unit's automatic feed takes TPU rated 95A or softer: the AMS, AMS lite and AMS 2 Pro are not compatible with TPU, and the AMS HT's automatic feeding cannot be used with TPU.
- Among AMS units only the AMS HT supports TPU, acting as a sealed enclosure whose automatic feeding cannot be used, with the filament fed through a dedicated rear TPU outlet; the AMS, AMS lite and AMS 2 Pro are not compatible with TPU.
- Table value: TPU 95A, 90A and 85A are not compatible with the AMS, AMS 2 Pro or AMS lite, and an AMS HT can only hold the spool as a sealed box fed by hand through its rear TPU outlet.
- TPU for AMS is compatible with the standard feeding of all AMS series models.
- Table value: other TPU rated 55D or harder is not compatible with the AMS, AMS 2 Pro or AMS HT automatic feed, because the TPU guide lists only TPU for AMS as an exception to TPU incompatibility.
- For the AMS, AMS 2 Pro and AMS HT, TPU for AMS is the one TPU grade Bambu names for printing from an AMS slot; at 68D it ranks above every A-scale grade.
- Shore A is the softer scale and Shore D the harder; a higher value means harder and less flexible; Bambu's order is 77D > 70D > 68D > 55D > 95A > 90A > 85A > 83A > 80A > 75A > 70A.
- Bambu recommends an AMS HT or a filament dry box as the container for printing TPU, raised so the filament feeds smoothly.
- TPU 85A is incompatible with A1 series printers and compatible with H2, X1, P series and A2L.
- Bambu's TPU guide links a separate TPU loading tutorial for each printer series: H2, X1, P, A1, A2L and X2D.
- Bambu's TPU guide describes the TPU Feed Assist Module as an upgrade for H/X/P series printers that reduces TPU feeding resistance and lets TPU feed through a dedicated TPU inlet.
- Bambu printers do not currently support TPU rated below 85A.
- Bambu's TPU guide lists TPU 85A as compatible with 0.6 mm and 0.8 mm nozzles and the TPU high-flow hotend, and not compatible with 0.2 mm, 0.4 mm or 0.4 mm high-flow nozzles.
- A 0.6 or 0.8 mm nozzle is listed as compatible for TPU 85A by the TPU guide, the P series TPU guide and the filament guide's nozzle table.
- Bambu's filament guide lists three kinds of filament as not recommended for the AMS and AMS lite: too soft, too brittle, and too hard and rough.
- Too soft examples are TPU 95A/85A/83A/80A and damp PVA or BVOH, which cannot pass smoothly through the AMS / AMS lite channel.
- Too brittle examples are certain brands of PET-CF, PLA Wood, PA-CF/GF and PAHT-CF/GF, which can break inside the channel; the brands are not named.
- Too hard and rough examples are certain brands of PET-CF, PA-CF/GF, PAHT-CF/GF and PLA-CF/GF, which can wear the internal feed channel; the brands are not named.
- The AMS has an extra transmission gear working with the extruder gear that gives stronger feeding force, so it can handle some softer or rougher filaments; the AMS lite lacks it.
- The filament guide's text lists most brands of PLA Glow, plus PETG-CF and PLA Wood, as compatible with the AMS but not recommended for the AMS lite.
- The filament guide's compatibility table addresses loading and unloading only; long-term wear of the feed channel is a separate check.
- Rough or abrasive filament such as carbon fiber or glow can grind down the AMS's internal PTFE feed channels over time even if it loads smoothly at first; those tubes are replaceable.
- Table value: PET-CF/GF, PPA-CF/GF and PPS-CF/GF are listed Not Compatible for the AMS / AMS lite.
- Table value: Bambu PLA-CF is listed Compatible for the AMS / AMS lite in the filament guide.
- Table value: PLA Glow is listed AMS Compatible and AMS lite Not Recommended in the filament guide.
- The filament guide table lists PETG-CF as AMS Compatible and AMS lite Not Recommended, with no brand named.
- Table value: ABS and ABS-GF are listed AMS Compatible and AMS lite Not Recommended.
- Table value: PVA and BVOH are listed Compatible when dry; damp PVA or BVOH counts as too soft.
- The filament guide table lists PLA Metal / Wood / Marble as Compatible in its combined 'AMS / AMS lite Compatibility' column, with no separate AMS lite entry.
- For the PA-CF/GF, PA6-CF/GF and PAHT-CF/GF row, the table's combined AMS / AMS lite column names only Bambu PA-CF and PAHT-CF as compatible.
- The filament guide's AMS table has a single TPU row, listed Not Compatible, and no separate AMS entry for TPU for AMS.
- PA-CF/GF, PA6-CF/GF and PAHT-CF/GF are listed Not Recommended on open-frame printers, and the guide lists the A Series and P1P as open-frame.
- The filament guide's nozzle table lists TPU 85A as Compatible with 0.4, 0.6 and 0.8 mm standard nozzles and Not Recommended with 0.2 mm.
- The filament guide's storage table marks protecting filament with desiccant during use as Required for PA-CF/GF and PAHT-CF/GF, and the guide advises keeping filament sealed with desiccant during printing.
- Table value: other brands' wood PLA is compatible with the AMS, AMS 2 Pro and AMS HT, subject to the warning that certain unnamed brands are too brittle.
- Table value: for other brands' wood PLA in the AMS lite, the filament guide gives two answers: its text lists PLA Wood as not recommended for the AMS lite, while its table lists PLA Metal / Wood / Marble as compatible in the combined AMS / AMS lite column.
- A carbon or glass fiber nylon spool fed from outside the AMS belongs in a sealed box with desiccant rather than on an open holder, because Bambu marks desiccant protection during use as required for these filaments.
- Where Bambu's pages conflict, feeding from outside the AMS (from a sealed box where the filament needs one), or a 0.6 or 0.8 mm nozzle for TPU 85A, is the option no Bambu page argues against.
- Table value: Bambu PET-CF's Cautions for Use list says All AMS Series NOT Compatible, matching the PET-CF/GF row.
- Table value: Bambu PLA-CF's Cautions for Use list says All AMS Series Compatible.
- Table value: Bambu PLA Glow's Cautions for Use list says AMS 2 Pro, AMS HT and AMS compatible but can lead to faster wear, and AMS lite not compatible.
- Bambu's AMS notes say to avoid printing flexible materials, including TPU, TPE or absorbent PVA, through the AMS because they may get stuck in the feed tube.
- Bambu's AMS notes say to avoid too-hard or too-brittle materials, including third-party fiber reinforcement materials (PA-CF/GF, PET-CF/GF, PLA-CF/GF, etc.), because they may wear the PTFE tubes and break; Bambu's own PLA-CF, PETG-CF and PAHT-CF are described as optimized for the AMS.
- Table value: other brands' PA-CF/GF, PAHT-CF/GF and PLA-CF/GF are to be avoided in the AMS, AMS 2 Pro and AMS HT.
- Table value: TPE is to be avoided in the AMS, AMS 2 Pro and AMS HT.
- Table value: for other brands' PETG-CF in the AMS, AMS 2 Pro and AMS HT, Bambu's pages disagree: the filament guide lists PETG-CF as AMS compatible with no brand named, while the AMS notes say to avoid third-party fiber reinforcement materials.
- Bambu's AMS 2 Pro wiki index lists Notes on the AMS among original-AMS articles that also apply, and lists an AMS 2 Pro PTFE Tube Replacement Guide.
- Bambu's AMS HT wiki index lists Notes on the AMS and a guide to replacing the PTFE tube inside the AMS HT; its Maintenance Guides heading lists no articles.
- None of the Bambu pages used gives a PTFE replacement interval for the AMS HT; its wiki index lists no maintenance guide.
- The AMS, AMS 2 Pro and AMS HT use a two-stage feed: an internal feeder pushes filament into an assist motor, which feeds it on to the toolhead.
- The AMS lite uses a single-stage feed in which the feeder unit feeds filament directly into the toolhead.
- The AMS lite is only compatible with A series printers.
- An A1 series printer can run an AMS, AMS 2 Pro or AMS HT through the A Series AMS Hub with firmware 01.07.00.00 or later, or one AMS lite that cannot be combined with other AMS models.
- The A2L supports up to 4 AMS units and 1 AMS lite at the same time.
- The filament guide's 'AMS' entries apply to the AMS 2 Pro and AMS HT, since the connection guide groups the three as 'AMS' with the same two-stage feed, Bambu files its AMS notes under both newer units, and store pages such as PAHT-CF and PETG-CF name the three together.
- Once an AMS lite print starts, only the extruder pulls the filament; the AMS lite feeder motor does not run.
- Table value: Bambu TPU for AMS has a Shore hardness of 68D and its Cautions for Use list says All AMS Series Compatible.
- The AMS lite FAQ says TPU of 77D, 55D or higher hardness can be used with the AMS lite, and 95A, 85A, 83A, 80A or softer cannot.
- Table value: for other TPU rated 55D or harder in the AMS lite, Bambu's pages disagree: the AMS lite FAQ allows it, while the TPU guide lists only TPU for AMS and the filament guide's single TPU row says not compatible.
- The AMS lite FAQ says CF and GF filaments are not recommended in the AMS lite, but names Bambu PLA-CF and Bambu PETG-CF as compatible with it.
- The AMS lite FAQ says to avoid TPU, TPE and absorbent PVA, and to use external spool placement for too-hard or too-brittle materials, including third-party fiber reinforcement materials such as PA-CF/GF, PET-CF/GF, PLA-CF/GF and PLA Glow.
- Table value (AMS lite column): other brands' PA-CF/GF, PAHT-CF/GF and PLA-CF/GF, and TPE, are to be avoided in the AMS lite.
- Table value (AMS lite column): other brands' PETG-CF is to be avoided in the AMS lite; the filament guide lists PETG-CF as not recommended there and the AMS lite FAQ names only Bambu's PETG-CF among CF filaments as compatible.
- Table value: for Bambu PETG-CF in the AMS lite, Bambu's pages disagree: its store page says not compatible and the filament guide says not recommended, while the AMS lite FAQ lists it as compatible.
- The AMS lite FAQ gives AMS lite PTFE tube lengths of 730 mm x 2 and 850 mm x 2 for the A1, and 580 mm x 2 and 700 mm x 2 for the A1 mini combo.
- The AMS lite FAQ does not mention wood PLA but sends too-brittle materials to external spool placement, so the external spool is the one route for wood PLA in an AMS lite that no Bambu page argues against.
- Bambu PETG-CF's Cautions for Use list says AMS 2 Pro, AMS HT and AMS compatible and AMS lite not compatible.
- Table value: Bambu PETG-CF is compatible with the AMS, AMS 2 Pro and AMS HT.
- Bambu PLA Wood's Cautions for Use list says All AMS Series Compatible.
- Table value: Bambu PLA Wood is compatible with the AMS, AMS 2 Pro and AMS HT.
- Table value: for Bambu PLA Wood in the AMS lite, Bambu's pages disagree: the store page lists all AMS units and the filament guide's table says compatible, while the filament guide's text says not recommended.
- Bambu says the natural wood powder in PLA Wood makes it more sensitive to moisture.
- On A1 series printers, TPU 90A is fed with the spool outlet above the extruder inlet: remove one PTFE tube at the toolhead, insert the filament directly into the extruder inlet, and unload manually; cutter-based automatic unloading is not supported.
- On P series printers, loading TPU 85A starts with removing the glass cover plate; the filament is loaded directly into the extruder from above, not through the PTFE tube; 90A can pass through a PTFE tube from a sealed box; both are unloaded manually, and cutter-based automatic unloading is not supported.
- Bambu's P series TPU guide also lists 0.4 mm as not compatible for TPU 85A and 0.6 and 0.8 mm as compatible.
- When TPU is fed through the AMS HT's rear TPU port, the filament is pushed through by hand, automatic feed and return cannot be used, and the AMS HT cannot dry filament while printing that way.
- Bambu PAHT-CF's Cautions for Use list says AMS 2 Pro, AMS HT and AMS compatible, AMS lite not compatible, and enclosure printer required.
- Table value: Bambu PAHT-CF is compatible with the AMS, AMS 2 Pro and AMS HT.
- Table value: for Bambu PAHT-CF in the AMS lite, Bambu's pages disagree: its store page says not compatible, while the filament guide's combined AMS / AMS lite column lists Bambu PAHT-CF as compatible.
- Bambu describes PAHT-CF as unsuitable for open-frame printers because of its thermal insulation needs.
- Because the AMS lite works only with A series printers, which the filament guide classes as open-frame, PAHT-CF in an AMS lite would run on a printer type Bambu calls unsuitable for it.
- PAHT-CF is described as an upgraded version of PA-CF, and PA-CF was discontinued.
- Bambu describes PAHT-CF as highly sensitive to humidity.
- The Cautions for Use list on Bambu's store pages for TPU for AMS, PAHT-CF, PA6-CF, PET-CF, PETG-CF, PLA-CF, PLA Glow and PLA Wood states AMS compatibility; the PAHT-CF, PETG-CF and PLA Glow pages name the AMS lite separately.
- Bambu PA6-CF's Cautions for Use list says All AMS Series NOT Compatible, and its comparison table lists AMS compatibility NO for PA6-CF and YES for PAHT-CF.
- Table value: Bambu PA6-CF is not compatible with any AMS unit, including the AMS lite.
- Bambu describes PA6-CF as highly moisture-absorbent and says to keep unused filament in a sealed container with desiccant.
- Filament breaking in the AMS 2 Pro feeder or PTFE tube usually happens when it has absorbed too much moisture, which makes it brittle and more likely to snap.
- For the AMS 2 Pro, Bambu gives no fixed PTFE interval: replace tubes on feeding errors, loading resistance, or after extended heavy use, particularly with abrasive or composite filament.
- For the first-generation AMS, the printer shows a reminder to check PTFE tubes every 2 months; tubes should be replaced every 2 months in normal use and every month, or when clear wear shows, with abrasive filament such as carbon fiber or glow.
- Bambu's recommended PTFE tubes are 2.5 mm inside diameter and 4 mm outside diameter, and other sizes are not recommended.
- For the first-generation AMS, the feeder-side and internal hub tubes are 2 x 195 mm and 2 x 230 mm, and the output tubes are 550 mm and 370 mm.
- Bambu's AMS maintenance page repeats the two-month normal cycle and monthly check and replacement with carbon fiber and glow filament.
- For the AMS lite, PTFE tubes should be replaced every two months in normal use, monthly for 24/7 printing, and promptly if noticeably worn.
- Bambu's PTFE tube listing gives an inner diameter of 2.5 mm and an outer diameter of 4 mm.