No more blue tape !

[John Grindon]

After installing the new heater on our "Evolution " printer, printing has taken a very interesting turn. I am now printing directly on the glass. The material has been PLA as well as a lot of Pet G. With the bed set to 90 deg C. and the extruder at 215 we are getting GREAT results. ZERO warping and a glass like finish on the bottom. Soon after the print is done you can pop it off with very little force. If you wait till it's cool, the print lifts off with ZERO force. It's kinda strange as it feels like it is just sitting there. Just thought I would put that out there as a general interest.

John Grindon CEO

Evolution printer Inc.

www.evolution3dprinter.com 

[Nick Wimpney]

You probably don't need quite that much heat for PLA on glass.  I usually do about 60C and it seems to work pretty well.

I have found that regardless of temperature, I will occasionally get lifted corners on a print.  If I'm not too concerned with getting the glassy finish, I usually just smear a thin layer of gluestick on the bed, and that gives just a tiny bit more grip.

From what I've heard, PETG can stick a little too well to glass, so the glue can also help get them off as well.  I've never printed PETG direct on glass, though, so YMMV.

-Nick

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[John Grindon]

Your info on the PetG is not correct. Even when the glass is still hot, it only takes just a tiny force to remove it from the glass. As I stated before, when cooled down it simply comes off with zero force as if it was just sitting there. All in all it's a far cry from the blue tape days. If you try turning up the heat just a bit, you will probably find the warp will be gone. I know I have and it's working great. You gota try the PetG !

On Thursday, February 15, 2018 at 10:26:19 AM UTC-8, NickW wrote:

You probably don't need quite that much heat for PLA on glass.  I usually do about 60C and it seems to work pretty well.

I have found that regardless of temperature, I will occasionally get lifted corners on a print.  If I'm not too concerned with getting the glassy finish, I usually just smear a thin layer of gluestick on the bed, and that gives just a tiny bit more grip.

From what I've heard, PETG can stick a little too well to glass, so the glue can also help get them off as well.  I've never printed PETG direct on glass, though, so YMMV.

-Nick

On Thu, Feb 15, 2018 at 9:08 AM, John Grindon <detaile...@gmail.com> wrote:

After installing the new heater on our "Evolution " printer, printing has taken a very interesting turn. I am now printing directly on the glass. The material has been PLA as well as a lot of Pet G. With the bed set to 90 deg C. and the extruder at 215 we are getting GREAT results. ZERO warping and a glass like finish on the bottom. Soon after the print is done you can pop it off with very little force. If you wait till it's cool, the print lifts off with ZERO force. It's kinda strange as it feels like it is just sitting there. Just thought I would put that out there as a general interest.

John Grindon CEO

Evolution printer Inc.

www.evolution3dprinter.com 

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[Nick Wimpney]

I've seen pictures of petg pulling chunks out of the glass when it cools, so it's definitely a thing.  Not 100% sure on the exact circumstances, though.  If it's working with the stuff you're using, though, stick with it.  The little bit of PETG I've printed has come off the bed fine, but I put on some glue stick just to be safe and ran the bed at 60 like I normally do.

BTW, the glue stick is a pretty great way to go, too.  I get the purple elmer's school glue that dries clear so it's easy to see when it's ready to go.  Only takes 30sec or so to dry on a 60C bed, and you don't need to clean and reapply after every print.  Usually i just put a little bit on every few prints.  If it starts getting too thick in places after several applications, I either peel it off with a razor blade, or wash it in hot water.

It's certainly not a necessity, but I did have some prints that had tiny lifts on the corners regardless of what I did with the temperatures, so for me it's just cheap insurance.

-Nick

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