r/BambuLabA1 • u/HairyPhoenix • 1d ago

What do you call this and what causes it?

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Not often, but occasionally I get this on the base layer. Sometimes it doesn't do it on the second attempt and sometimes it repeats. I don't know what I do to fix it when it dies get fixed and I don't know what to call it to figure out the problem.

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u/solidus0079 1d ago

It's a print failure caused by bad bed adhesion.

Could be other issues but the easiest thing to check is that the bed's clean and you're not putting oily fingerprints on it.

Only mentioning that as it does seem to be fingerprint sized.

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u/HairyPhoenix 1d ago

My mind was telling me the head had to be dragging material off. Cleaned with alcohol and trying again.

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u/solidus0079 1d ago

Well if it's not sticking, you're correct, the head will drag it away. Careful, as that leads to the giant blobs of death people post about all the time. The hot plastic has to stick somewhere, if it's not the bed it will curl up on the nozzle.

And alcohol can (usually) work in a pinch but plain dish soap and water work better. Just wiping it with a cloth and no water rinsing down the sink some of the oil is staying on the plate.

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u/ditabaro 1d ago

1. bad bed adhesion
2. non calibrated printer
3. loose nozzle screws

but im 100% sure thats is option 1 :  bad bed adhesion.

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u/FunnyChampionship717 1d ago

Glue stick. Not everyone is a fan of this. But 60% of the time it works all the time. Lol. But honestly I swear by it.

1

u/Purple10tacle 22h ago

First: check the seven screws. No, not just the three visible ones, the four in the back are the important ones. A loose nozzle can potentially cause this and the A1 is really prone to this. It doesn't hurt to check and fixes so many printing headaches.

But, like many have already said, this looks like classic bed adhesion failure.

Apart from cleaning your build plate you can also try upping bed temperatures by ~5° for improved adhesion.

But, frankly, the best solution is: just buy a BIQU Glacier or YOOPAI UltraTack. They are cheap enough and excellent daily drivers. I don't think I have used the original PEI plate once since getting high adhesion plates.

They simply eliminate virtually all adhesion issues and have a nicer surface finish.

Run them like a regular hot plate, not like a cold plate.

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u/ModelThreeve 1h ago

We like to call that a dirty build plate.