Bambu Lab A1 Combo Review After 100 Hours: Still Worth It?

After about a week and a little over 100 hours of printing, my Bambu Lab A1 Combo was still making a strong case for itself. The PLA projects worked, a black PETG vent fitting printed without supports, and my Bambu TPU test completed. I did not run into bed-adhesion problems. The one interruption I reported was an AMS lite feeding issue that I cleared by removing and reinserting the filament, then resuming the print.

My reservations were practical: the space occupied by the AMS lite, the purge material from multicolor jobs, and the need to check exactly which TPU is compatible with the material system. This is a hands-on first-week review—not a months-long reliability test or a controlled comparison with every competing printer.

Quick verdict after the first week

I liked the A1 Combo more after this week of use, not less. The strongest result was the range of ordinary projects it handled without becoming a troubleshooting exercise: small puzzle-box components, a multicolor calendar, an open-frame animal, a working gear fidget, a detailed statue, and a larger PETG part.

For a beginner who wants to choose a model, map the colors, and get a usable print, the connected Bambu workflow was a real strength. For someone printing frequently in several colors, the qualification is equally important: a successful print can still discard a substantial amount of material. My fidget-spinner job produced 48 g of purge waste.

The biggest change since my A1 Combo setup and first-prints guide was moving the AMS lite above the printer. That solved the side-space problem in my workspace, and I did not notice a print-quality penalty during the remaining tests. It is an observed result from this setup, not proof that every top mount or installation will behave identically.

What this review actually tested

The test window was approximately one week, with a little over 100 hours on this machine. Most of the projects were PLA, followed by the PETG fitting and a TPU sample. I discuss the completed objects, how difficult they were to finish, and the one feed interruption rather than presenting a synthetic benchmark score.

I did not record a complete recipe for every project in the video. There is no verified set of nozzle temperatures, bed temperatures, layer heights, speeds, support gaps, or flushing volumes to copy from this review. Likewise, the results do not establish a maximum printing speed, dimensional-tolerance rating, noise measurement, or lifetime failure rate.

The summary below separates what printed from what still needs qualification. It is a record of the projects shown, not an exhaustive job log.

If you are still unboxing your machine, use the setup guide first. This follow-up starts after assembly and calibration; repeating those instructions would obscure the more useful question here: did the convenient first impression hold up across different jobs?

Moving the AMS lite above the printer

The first project discussed in this follow-up was a PLA stand for the AMS lite. Instead of keeping the unit beside the A1, I moved it onto the gantry. The arrangement also has two supports extending down toward the base, rather than relying on the upper mounting point alone.

That matters in my workspace because the area beside a printer is valuable. A side-mounted material system can occupy space I would otherwise use for another machine. Moving it upward was a layout improvement, not an attempt to repair poor print quality.

I did not notice a quality problem after the change, and all the other prints discussed in this review followed the move. I also did not have another occurrence of the filament-feed issue during this test window. Those observations are encouraging, but they do not isolate the mount as the cause of either result.

For your own installation, follow the instructions for the specific mount, including its material, fasteners, and bracing requirements. Check overhead access for loading spools and confirm that the tubes and cables can move freely. My PLA mount surviving this first week is not a long-term load or durability certification, and I did not measure the complete operating footprint.

PLA results: small parts, multicolor details, and cleanup

Puzzle box: the small pieces were the useful test

The puzzle-box project used green, black, and white. I deliberately left it unassembled for the video so I could show the smaller gears and pins. Those are more informative than a closed box when the question is whether the printer produced the little components cleanly.

I reported no printing problems and was happy with the quality. The important limit is that the video does not demonstrate the fully assembled puzzle operating. Clean-looking parts and a successful print are positive results, but they are not the same as a measured clearance test or a complete mechanism validation.

Open-frame leopard: a good print with awkward supports

The leopard was mostly one color, with black-and-white eye details and black on the claws. The open structure made it an interesting print, and the job itself completed without an issue.

The work came afterward. Supports were trapped inside parts of the body, making removal awkward. That is a useful distinction for a buyer: the printer can finish a model successfully while the geometry still makes cleanup unpleasant. A photograph of the finished object does not show all the time spent getting to that point.

Before committing to a similarly open model, general guidance is to inspect where supports will be placed and whether you can physically reach them. This review does not provide a tested support-setting fix for the leopard. I mentioned soluble support material in passing, but did not test PVA here; do not treat that aside as either a compatibility test or a demonstrated cleanup method.

Endless calendar: readable contrasting details

The rotating calendar was another multicolor PLA job. I liked the finished result and reported no issue with it. It is a practical desk object rather than a printer torture test, which makes it relevant to the sort of work many owners will actually send to the machine.

Its contrasting lettering and symbols provide a different visual check from the leopard's sparse color accents. Neither example establishes that every model will print cleanly without adjustments, but together they show the A1 handling more than one style of multicolor project during the week.

Hydra statue: detail and easier support removal

The final PLA example was a Hydra statue, chosen to look at finer details around the heads. I was happy with the result, and its supports came off easily.

That contrasts with the leopard. The two support experiences are not contradictory: the model, support placement, and access to those supports all affect finishing. The useful takeaway is to budget for cleanup according to the actual geometry, rather than assuming all supported PLA prints will behave like the easiest example.

The gear fidget worked—but produced 48 g of purge

The multicolor gear-based fidget spinner completed successfully and worked. I also tracked the discarded purge filament for this job: 48 g. That number deserves a place next to the successful result, not a footnote hidden behind the color features.

With several filaments sharing one nozzle, changing color involves clearing material from the previous color. How much ends up outside the model depends on the job and the change sequence. The 48 g figure is specific to this spinner, not a standard waste amount for an A1 print or a measurement of the entire week's waste.

It also is not evidence that the A1 became more efficient than it was during my first-look video. Those earlier jobs were different models. A fair efficiency comparison needs matching geometry, colors, quantities, and relevant slicing choices—not just two purge weights from unrelated objects.

My practical advice is to review the sliced material estimate before starting a color job and decide whether the appearance is worth the additional material and time. Use the multicolor print planner to think through the job, then compare the estimate with your own finished print. Do not reduce flushing blindly if it leaves unwanted color in the part.

For someone making a few decorative objects, this may be an acceptable tradeoff. For repeated production, purge belongs in the material accounting. The machine printing reliably does not make that discarded filament free.

PETG: a support-free vent fitting

I switched to basic black PETG for a fitting intended for a laser-ventilation project. It printed as one piece without supports. In the video I point out the seam on one side and the cleaner opposite side; the overall result was successful.

This broadens the review beyond decorative PLA, but the claim should stay specific. It shows that this PETG part printed successfully on my A1. It does not establish long-term durability, air sealing, heat resistance in service, or suitability for a particular exhaust system. I had not presented those installation or service tests in this video.

If you are making a functional part, inspect the print and then validate it against the job it must do. A finished fitting is the start of that evaluation, not evidence that the complete ventilation system is safe or effective. The printer result and the application requirements are separate questions.

TPU: the material name matters more than the brand

My Bambu-branded TPU sample printed through the AMS setup, while an attempt to use another TPU prompted an unsupported-material error. That is the experience I describe in the video. The phrase “Bambu TPU” needs more precision before a reader buys a spool, however.

Bambu lists TPU for AMS as compatible with AMS and AMS lite. Its TPU 95A HF documentation explicitly says that product is not compatible with either. A Bambu label by itself therefore does not establish AMS lite compatibility.

The video does not clearly establish the exact product label for the successful spool, so I am not using it to declare that I tested every Bambu TPU formulation. Nor does the rejected material prove that every third-party TPU is unsupported. The purchasing check is the exact filament formulation and the manufacturer's compatibility guidance for the intended feed path.

I mentioned bypassing the AMS as a possible route for other TPU, but did not demonstrate that workflow in this review. Do not treat it as a tested loading procedure here. If flexible materials are a major reason you are buying, resolve that material-path question before ordering the printer or filament rather than assuming a successful PLA workflow transfers unchanged.

The one AMS lite interruption

The issue I reported was a filament-feed interruption while the AMS lite was still beside the printer. I removed the filament, put it back in, told the machine to resume, and the job continued from where it had stopped.

I suspected tension in the tubing because the tubes were somewhat stretched in that arrangement. I did not establish that as the cause. The problem did not recur after I moved the unit above the printer during this test window, but that sequence is not enough to prove a top mount fixes feeding faults.

If you see a similar interruption, start with the actual message and inspect the filament path according to the manufacturer's instructions. Look for an obvious obstruction or strained routing before changing unrelated print settings. My experience supports a narrow positive point: this particular interruption was recoverable without abandoning the job.

Bambu Handy and MakerWorld were a strength

The app-connected workflow was one of my favorite parts of using the A1. I could select a model through the MakerWorld-connected experience, map the colors, and send it to print without turning each project into a separate setup exercise.

That is especially useful for beginners: there is a short path between finding something interesting and making it. It still pays to verify that the selected profile, machine, material, and color assignments match what is actually loaded. Convenience reduces the number of steps; it does not remove those checks.

Whether that ecosystem appeals to you is part of the buying decision. I liked the workflow. If you specifically want a different software or connectivity arrangement, investigate that requirement directly rather than assuming this app-focused review has tested it. I did not run an offline-workflow comparison here.

Who I would recommend the A1 Combo to

Based on this first week, I would consider it a strong fit for a maker who wants approachable PLA and multicolor printing, expects to make a mixture of decorative and practical objects, and values the integrated model-to-printer workflow. The successful PETG example is encouraging for expanding beyond PLA, within the limits of the material and intended application.

I would pause if your buying decision depends on very low multicolor waste, a particular flexible filament through the AMS lite, or a tightly constrained work area without a workable material-system layout. I would also look for additional evidence if you need engineering-material results, production uptime figures, or months of maintenance history; this review does not supply them.

I described the A1 as my favorite bedslinger at the time of recording. That is an opinion based on my experience, not a controlled ranking of every current model. I also discussed future comparisons with the P1S and other machines, but those were not completed head-to-head tests in this video. My separate P1S first-use report provides context without pretending the two articles are a matched benchmark.

A practical checklist before your next week of printing

• Plan the printer, AMS lite, spool access, and moving bed as one workspace—not just the footprint of the printer base.
• If using a mount, follow that design's hardware, material, and bracing instructions; inspect the resulting tube and cable paths.
• Start with the correct machine and filament profile, and verify the color-to-slot assignments before sending a multicolor job.
• Review support placement for access as well as printability, especially on open-frame decorative models.
• Check the purge and total material estimates before committing to a long color job.
• Confirm the exact TPU product and feed-path compatibility; do not make that decision from the brand name alone.
• Keep notes on interruptions and recovery steps so a recurring issue is not confused with a one-off event.
• Evaluate functional parts for their intended service separately from whether they finished printing.

Frequently asked questions

Did the A1 have adhesion problems after 100 hours?

I did not report adhesion problems during this first-week test. That is the result for my machine, projects, and conditions—not a guarantee for every plate, spool, or environment.

Did the top-mounted AMS lite hurt print quality?

I did not notice a quality penalty, and the remaining projects shown followed the move. I did not conduct a controlled before-and-after vibration or accuracy test.

How much purge waste did the fidget spinner produce?

I recorded 48 g for that job. It is a job-specific purge measurement, not a weekly total or a universal multicolor waste ratio.

Can any Bambu TPU go through the AMS lite?

No. Check the exact product: Bambu lists TPU for AMS as compatible, while TPU 95A HF is listed as incompatible. The successful sample in this video should not be generalized to every TPU sold under the same brand.

Is this a long-term reliability review?

No. It is a useful follow-up after about a week and a little over 100 print hours. It adds varied print results and a recoverable feed interruption to the initial setup experience, but not months of wear or maintenance history.

Bottom line: still worth considering, with clear tradeoffs

The A1 Combo's first week reinforced my positive initial impression. It handled the projects I showed, the app workflow was convenient, and the single feed interruption was recoverable. Moving the AMS lite upward made the arrangement more practical for my space.

The things to decide before buying are not hidden: are you comfortable with the ecosystem, can you accommodate the material system, and is the purge cost acceptable for your actual models? Add exact TPU compatibility to that list if flexible printing matters to you.

For the setup baseline and the rest of my printer coverage, continue through the Bambu Lab guides and reviews hub. This review answers how my first 100-plus hours went; the next useful step is choosing the workflow that matches the parts you want to make.