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heat bed warp?

tattooedfish

heat bed warp?
March 12, 2013 02:32PM

Registered: 11 years ago
Posts: 161

I have the mk1 heat bed I calibrated it 8 points in the corners left right front to back but for whatever reason it seems to sink in the middle ever so slightly. Do I need to make some form of a brace? Is this maybe warped during central pressure during a heat cycle?

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brnrd

Re: heat bed warp?
March 12, 2013 06:04PM

Registered: 13 years ago
Posts: 1,780

You have to put something flat on top of it like glass to print on. For ABS, put PET tape on top of the glass and heat to 110 C or so. For PLA, you can print directly on glass heated to 60C or so. There are coating people use to improve adheasion like hair spray or PVA glue for PLA.

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tattooedfish

Re: heat bed warp?
March 12, 2013 06:08PM

Registered: 11 years ago
Posts: 161

I have glass on it that is the odd part I guess I need to see about getting a new piece of glass maybe this one is warped

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brnrd

Re: heat bed warp?
March 12, 2013 06:36PM

Registered: 13 years ago
Posts: 1,780

How thick is the glass? I use 3 mm.

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tattooedfish

Re: heat bed warp?
March 12, 2013 06:58PM

Registered: 11 years ago
Posts: 161

I believe this is about the same its just traditional plate glass for windows

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xiando

Re: heat bed warp?
March 12, 2013 07:12PM

Registered: 11 years ago
Posts: 477

What's known as "single strength" glass should be fine. In the USA, it's 3/32" thick.