Is there any possible way to remove the deposits on the hotend?

Bambu Lab H2 Series
1

I was trying to heat on the TH and took the hotend rifht away as soon as it gets 200 degree Celcius to wipe them while it’s still hot but it didn’t work fine.

Is there any alternative method to remove them without 3D printer?

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2

Usually some IPA works well. Spray some IPA on it and then wait a bit, then use your scraper to remove the residues. You don’t need to cook it up to 200C.

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3

Thanks!
What kind of scraper do you recommend?

4

If it’s ABS or ASA, acetone might help.

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5

Acetone for ASA?! For ABS of course, but I did not know ASA reacts to acetone.

6

It does. Just slower and kinda more aggressively once it gets to it. At least in the way I use it. Its more like for me, ABS can stay in the chamber 10-15 minutes , ASA will need PRECISELY 17 to 17.5. Otherwise it turns into a moonstone. Numbers are examples, timing/temp/pressure will vary

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7

Start with acetone. There’s nothing on that surface that it might harm, except the crud.

I’d recommend sticking with chemical solvents and avoid abrasives except as an absolute last resort.

8

I was just thinking acetone! It works awesome!

9

What if it’s PLA or PETG?

10

Acetone doesn’t dissolve PLA or PETG. You need more harmful substances to dissolve them.
You can google them, but if that is the case, I would try to remove it physically by gently scraping it off.

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11

I use a fresh razor blade held at an extreme angle. It will also chop off any aluminum burrs on the edge of the heated surface, that may be creating an air gap

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12

I use a brass brush since it is softer than the nozzle

13

You could try coating the nozzle in Slice Engineering’s plastic repellant in order to try to minimize the stuff sticking to the nozzle. A couple farm owners I talked to swear by it but I bought it and I’m not so sure so I call it printer snake oil. It’s best put on a new or clean nozzle. It’s $12

14

I use a larger Dremel tool with a stainless wire brush tool. Be aware that the wire brush will start shedding individual strands of wire after a while

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15

I’ve been using a nice new utility knife blade. It worked super well! Of course make sure to keep the blade at a shallow angle to you don’t dig into it. It’s a very fast, simple, compact and affordable solution without the need for Isopropyl Alcohol (IPA), Acetone or any other chemicals.

16

Lapping paper will work(very fine sand paper).

17

Does the A1 have the same problem? The hotend design is similar, is it not?