SoliForum - 3D Printing Community — Slow cool down of bed

Re: Slow cool down of bed

2013-06-20T06:58:29Z

I think my problem is i went above 110c, i'm not sure exactly what temp but it was scolding. I'm not sure why but i remember from somewhere that normal glass doesnt like going over this temp.

Re: Slow cool down of bed

2013-06-20T01:16:48Z

Borosillicate Glass (aka Pyrex) for the win.

Its designed for heating and cooling.

Standard glass is not.

Pick some up from one of many reprap ebay retailers .. I paid $15 a 200x214mm square shipped.... and it wont ever shatter except through physical mis-treatment

But standard glass is not annealed, and yes, will eventually develop fractures to the surface and fail spontaneously...
So use the pyrex - heat cycles is what its made for No need for fancy cool down etc

Heres a link I've even UK-asised for you Only 13 quid! (I actually got 200x214 from somewhere, as I wanted some spare room for clipping it down...)
http://www.ebay.co.uk/itm/Borosilicate- … 3383057aab

Re: Slow cool down of bed

2013-06-20T00:43:15Z

I had a piece of glass break when i printed a part that was about 7x7 inches on my SD3. While cooling "BANG!!!" the glass broke.

Re: Slow cool down of bed

2013-06-19T23:48:52Z

Change your end Code to something like 60 Celsius instead of "off." I'm surprised, I rapid cycled cheap 2mm glass plenty of times without a problem. it's slow to cool down because of thermal mass and the printer chamber being surrounded by walls. Never blew cold fans on it or anything.

Slow cool down of bed

2013-06-19T17:16:49Z

I'd like to see a slow cool down feature for the bed... After my latest glass shattering it struck me a cool down cycle for he bed would be handy as I believe its contraction after cooling that causes glass to shatter not expansion on heat (usually)