this post was submitted on 29 Sep 2025
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ISOLEYIN Ultra PLA 3D Printing Filament 1kg, 1.75mm

I got two spools of this stuff (black and white). First few prints with the white went perfectly. Since then, it won't adhere normally.

I've tried increasing the bed temperature to 60, filament temperature to 210, washed the bed and reapplied the glue, dried the filament.. nothing works.

When I try a raft, it blobs through it, and then won't adhere to itself.

I'm assuming it's me, but idk what I'm doing wrong.

Please be kind, I've only had my printer for a couple of months.

For anyone wondering, it wasn't my filament. It was my nozzle. I replaced the hotend when I first got the printer, and I thought the nozzles would last longer than a few prints. As soon as I replaced it, everything was great again. Note to self, order these things in bulk.

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[–] empireOfLove2@lemmy.dbzer0.com 5 points 3 months ago* (last edited 3 months ago) (2 children)

I have had bad, wet sections of PLA refuse to adhere to beds or its own layers. There's a lot of ways a filament manufacturer could fuck up the blend or moisture control, especially with cheaper shit.

Cut a section out and hold a lighter or heat gun under the end until it softens and curls up.
Good filament should look smooth and the same color. Bad filament will get bubbly, wart-looking texture and take on a yellow sheen. The bubbles are moisture leaving the plastic and the yellow sheen is the plastic breaking down, it will have no adhesion.

Worth trying to dry it just to see if it improves at all but cheap filament is gonna be cheap.

[–] discomatic@lemmy.ca 2 points 3 months ago

Weirdly, it worked no problem for a few days before it just didn't anymore. Maybe I'll try drying it again.

[–] discomatic@lemmy.ca 1 points 3 months ago

Oh, and I'll try this, thank you.