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Does the Promega Unbound Glass Fiber print sheet just suck?

Posted: Mon Jun 24, 2019 7:36 pm
by aperezbios
I recently got my base/discount Promega 3D printer set up, and attempted a first run and bed leveling. I've found that the bundled https://store.printm3d.com/collections/ ... iber-sheet that came with the printer is godawful, and simply will not lie flat enough against the heated bed it sits atop to be sufficient for daily use. I am completely unable to get a flat enough print bed for normal use. Am I doing something wrong? I've attached it with the supplied clips, which keep it secured, but it bows upwards in the middle by a non-trivial amount.


Before I go and drop $100 plus shipping on their fancy glass bed sheet, are there any pointers or things I can try, besides the bundled sheet? Is the glass print bed worth the premium? I'd love to hear from someone who has actually used it.

Re: Does the Promega Unbound Glass Fiber print sheet just suck?

Posted: Tue Jun 25, 2019 12:03 am
by TheBum
My main issue with the Unbound sheet is its delicate surface. If you have a small part that you can't get a good grip on and you have to scrape it off, the Unbound sheet scratches and gouges way too easily. I went back to glass.

Re: Does the Promega Unbound Glass Fiber print sheet just suck?

Posted: Sun Jun 30, 2019 9:11 am
by cwleveck
Short time lurker first time poster......
I don't know why mine lays flat but it does.... And I LOVE it. Question though. I am running strictly PLA with a board temp of 50-60 and I tend to print stuff and go to bed....
When I go to pull my parts off, they are already off. I don't have to scrape or pull or futz with anything.
If I try to pull them off right away, there is hardly any resistance. If I start a print and have to restart because of an iD10T error, while the bed is still cooling down then its stuck on there...
Having not had any issues with the bed I haven't done any reading on it.... So is this normal behavior? Will ABS behave similarly?
What would be the advantage, if any, to going to a glass bed?