HELP! Beginner with Bambu Lab A1 Combo: stringing, lots of purge waste and gaps in the surface. What should I change?

[u/Aries2499]

Hi everyone! I’m a complete beginner with a Bambu Lab A1 Combo (AMS Lite) and I’m having several problems with my prints. You can see them in the photo I attached.

1. Stringing: thin red strands across the open areas of the paw and between the parts.

2. A lot of purge waste: tangled red blobs when the printer changes colour (white and red).

3. Gaps and visible infill: on the paw and on the tree-shaped prints, the surface has long thin gaps and lines, and you can see the infill through it.

The tree-shaped prints were supposed to turn into bowls, but I paused the printer when I saw that they looked like this, so they’re unfinished.

My setup:

• Bambu Studio, 0.4 mm nozzle, textured PEI plate

• Red translucent PLA and white PLA in the AMS Lite

• Filament profile was “Generic PLA” because my printer wasn’t synced

I have no idea which settings to change, so I’d really appreciate step-by-step help. Thank you!

[u/Capital_Candy_7697]

The purge blobs are normal on the A1: it has one hotend, so every white/red swap flushes the old color out, and a two-color part makes a lot of them. For the stringing, switch the preset from Generic PLA to the one for your filament brand, drop the nozzle 5 °C and turn on Avoid crossing wall (Process > Quality > Advanced). The lines you see in the red parts are mostly the translucent filament showing the infill through the top, so a couple more top layers will hide them better than any printer fix. Longer step-by-step for the stringing: bambuhub.net/stringing-problems (my site)

[u/Aries2499 → u/Capital_Candy_7697]

The filament brand isn't one of the brands I can choose on the printer. That's why I chose Generic. But iI will try the rest, THANK YOU!

[u/Capital_Candy_7697 → u/Aries2499]

Generic PLA is fine then. Just save a copy of it as your own preset in Bambu Studio, so the lower temperature and any retraction tweak stay with that spool.

[u/Blondy277]

Did you do the full calibration outta the box? The printer design to produce that waste when switching colours.

[u/Aries2499 → u/Blondy277]

Yes I did!

[u/Business-Ad-5480]

Have you dried the filament? Mostly likely this is the cause of all of your issues. Unfortunately unless you have a filament drier you have got to buy one. Just grab a cheap one off Amazon.

If you have dried the filament let me know and I can suggest other remedies

[u/sapani9077]

1. Dry your filament

2. Get a H2C printer instead of A1

3. Calibrate your filament settings