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IMMark
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Joined: 18 Nov 2010
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Location: Columbus, Ohio
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 Posted: Wed Aug 17, 2011 1:55 pm Post subject: Oven distance from sheet |
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Any thoughts on oven distance from the plastic?
At this point, plastic ranges from HIPS .030 - .080 and acrylic .118
My oven is currently at 7 inches from the bottom of the coils to the top side of the sheet (it is an overhead oven design).
Just wanted to see if you think that is a bit high or about right?
Thanks
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jdougn
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Location: Louisville KY area
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| Posted: Wed Aug 17, 2011 2:42 pm Post subject: |
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Is the plastic heating fairly even without cold & hot streaks? If the plastic is too close it'll streak. Others may have a more experienced response.
dn
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IMMark
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Location: Columbus, Ohio
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| Posted: Wed Aug 17, 2011 3:03 pm Post subject: |
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No, it really seems to be heating ok (maybe shouldn't fix what isn't broken).
But it does seem to take a long time to heat up (especially the thicker acrylic).
Mark |
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kayaker43
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| Posted: Fri Aug 19, 2011 11:06 am Post subject: |
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Closer is always better but less than twice the element spacing starts to cause problems.
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jdougn
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| Posted: Fri Aug 19, 2011 9:17 pm Post subject: |
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| IMMark wrote: | No, it really seems to be heating ok (maybe shouldn't fix what isn't broken).
But it does seem to take a long time to heat up (especially the thicker acrylic).
Mark |
How much time are you talking about? ABS is what I use and it's a lot different than Acrylic. But 1/8" black ABS would take around 5 -7 minutes starting with a cold oven and a minute or two less time after the whole system gets warmed up. But that's not a 100% oven capacity either.
dn
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IMMark
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Location: Columbus, Ohio
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| Posted: Sat Aug 20, 2011 3:49 pm Post subject: |
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A cold oven at 100%, 3 1/2 mins for .118 acrylic. Not sure if that is normal or if I could do better by bringing the oven in to maybe 4"?
Mark |
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jdougn
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| Posted: Sat Aug 20, 2011 4:00 pm Post subject: |
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| IMMark wrote: | A cold oven at 100%, 3 1/2 mins for .118 acrylic. Not sure if that is normal or if I could do better by bringing the oven in to maybe 4"?
Mark |
I would think that's not bad. However, you could always experiement around. Acrylic is not my thing so I can only compare to ABS.
dn
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