shrinking prints July 27, 2012 01:40PM |
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Re: shrinking prints July 27, 2012 02:17PM |
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Re: shrinking prints July 27, 2012 02:20PM |
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Re: shrinking prints July 27, 2012 02:44PM |
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Re: shrinking prints July 27, 2012 02:55PM |
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Re: shrinking prints July 27, 2012 03:31PM |
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Re: shrinking prints July 07, 2014 01:34PM |
Registered: 11 years ago Posts: 1,277 |
I realize this is a very old thread but I was wondering if you ever figured it out? I get it where it reaches a point of maximum shrinkage then starts to expand out again and I have no idea why.Quote
nophead
The bed is too hot if you get a severe hourglass effect. I drop the temperature after the first layer to get good adhesion without this effect.
I always get it to a very minor extent regardless of what plastic I use. The first layer is stuck to the bed so can't shrink. The second layer contracts and pulls inwards as it cools. What I have never understood is why after a few layers it starts to get bigger again.
Re: shrinking prints July 07, 2014 05:19PM |
Registered: 11 years ago Posts: 1,171 |
Re: shrinking prints July 07, 2014 06:37PM |
Registered: 11 years ago Posts: 1,277 |
Ahhh, those photos are yours? I see them on the trouble page.Quote
tmorris9
The part is stuck to the bed so the bottom stays relatively same size. Heated bed caused it to shrink as it goes up squeezing the middle inward but the further away you get from the heated bed the effect diminishes so it returns to proper size and that is why you get the hour glass look.
80c is now the recommended heated bed temperature. Some people say 100c for first layer then drop to 80c. I run mine at 85c all the time now and my sides are perfectly straight.
These photos show my early attempts to solve this when I just would turn off my heated bed after the first layer
Re: shrinking prints July 09, 2014 11:59AM |
Registered: 10 years ago Posts: 128 |
Quote
tmorris9
The part is stuck to the bed so the bottom stays relatively same size. Heated bed caused it to shrink as it goes up squeezing the middle inward but the further away you get from the heated bed the effect diminishes so it returns to proper size and that is why you get the hour glass look.
80c is now the recommended heated bed temperature. Some people say 100c for first layer then drop to 80c. I run mine at 85c all the time now and my sides are perfectly straight.
These photos show my early attempts to solve this when I just would turn off my heated bed after the first layer