Has anyone been having the problem of ABS prints sticking too well to a

3D Printing
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Has anyone been having the problem of ABS prints sticking too well to a PET covered glass plate?

Until recently I didn’t have any adhesion or release problems and that was without the application of any additional glue.

I would appreciate tips on avoiding excessively tight adhesion, as well as tips on how to get a stubborn item to release. I was printing things with a flat 1" circular bottom with black ABS at 230C at the nozzle, and 110C at the bed.

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Sounds like you’re simply too close to the bed for the first layer.

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@ThantiK Thanks for the input. I’ll do some experimenting.

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There are other things that could factor in too. Bed temp might be able to be lowered, etc. So many variables. This is honestly why “professional” machine filament costs so much, because it’s a specific tightly controlled formulation, and they’ve worked out all its properties. Your next roll of ABS might barely stick at all. Next roll might have perfect adhesion, just…so much differs.

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@ThantiK Yes, I’m certainly learning that! I got my machine going about a month ago and have stumbled into many of the potholes on the road. Your advice is very much appreciated.

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Are you waiting for the bed to cool before trying to remove the parts? That usually makes it a lot easier. In some cases, they parts release completely from the platform on their own when the platform cools fully.

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@Whosa_whatsis Yes, I had been doing that. Earlier my parts seem to have been releasing at around 50-60C. When the parts stuck really badly this time, I waited till the bed reached room temperature. Most of them would not release even with considerable force. So I even tried sticking the glass bed in the freezer with no success.

I finally re-heated the bed and used a box cutter to jam into the bottom of the part. They finally came loose, but of course sacrificed the parts and did a little damage to the film.

If anyone has a tip on releasing stuck parts, I’d appreciate it.

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@ThantiK I just wanted to follow up and say that it was indeed being too close to the print surface that caused the problem.

I still don’t know how to get the piece off the bed if it gets really stuck, but I hope to avoid that situation in the future.

Thanks for the input.

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@Dave_Kodama , there’s something I wanted to try a long while back when it happened to me; thermally cycling the bed overnight. Basically just take the gcode at the start for warming up the bed (and waiting for it to warm up) and going from 28C to 110C, over and over and over again through the night. I haven’t had a problem ever since, so I haven’t been able to give it a shot. Dunno if it’ll work or not, but might be worth a shot if you can figure out the gcode.

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Thanks! I’ll make a note of it as something to try if I ever have the problem again.