120V Heatbed: Difference between revisions
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*Carbon fiber is also used as a heating wire - [https://www.aliexpress.com/item/New-Infrared-1K-2K-3K-Carbon-Fiber-Silicone-Rubber-Insulated-Heating-Wire-Electric-Hotline-Carbon-Heating/32887756465.html?spm=2114.search0604.3.3.202e502ftLlUef&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10130_10068_10890_10547_319_10546_317_10548_10545_10696_453_10084_454_10083_10618_10307_537_536_10059_10884_10887_321_322_10103,searchweb201603_6,ppcSwitch_0&algo_expid=c6c663d9-05c3-41ef-8ab0-0876ea85644d-0&algo_pvid=c6c663d9-05c3-41ef-8ab0-0876ea85644d&transAbTest=ae803_3]. Interesting. But it appears it can only do 15W/meter? Why is it limited? | *Carbon fiber is also used as a heating wire - [https://www.aliexpress.com/item/New-Infrared-1K-2K-3K-Carbon-Fiber-Silicone-Rubber-Insulated-Heating-Wire-Electric-Hotline-Carbon-Heating/32887756465.html?spm=2114.search0604.3.3.202e502ftLlUef&ws_ab_test=searchweb0_0,searchweb201602_4_10065_10130_10068_10890_10547_319_10546_317_10548_10545_10696_453_10084_454_10083_10618_10307_537_536_10059_10884_10887_321_322_10103,searchweb201603_6,ppcSwitch_0&algo_expid=c6c663d9-05c3-41ef-8ab0-0876ea85644d-0&algo_pvid=c6c663d9-05c3-41ef-8ab0-0876ea85644d&transAbTest=ae803_3]. Interesting. But it appears it can only do 15W/meter? Why is it limited? Limitation appears to be encapsulating materials - [https://www.azom.com/article.aspx?ArticleID=1624] | ||
Revision as of 22:52, 16 April 2019
About
- OSE Reasons for using it are scalability and low cost for large beds. For small beds, we can make whatever size we need.
- Hackaday article - [1]
Sourcing
Pad
- Expensive on amazon - [2]
- Silicone rubber sheet - to 450F - [3] - $6/sf
- 10x10" heatbed aliexpress 500W - $10 - [4]
- 200W 8x8, $13 - [5]
Silicone Rubber Sheet
Double Sided Tape
- $3/sf - [8]
Single Sided Tape
- Kapton tape, 4"x100ft - $25 - [9]
- Enough for 300 small beds (4"), or 33 12" beds.
Coated Nichrome Wire
- Need 30 Ohms of wire, about 10' long
- See Nichrome Wire
Uncoated Nichrome Wire
- Need 30 Ohm resistance for the length of wire at 120V to get 480W, for P=IV, V=IR, I=V/R -> P=V^2/R = 120^2/30 according to Electrical Power Calculator.
Sleeving
- Wire sleeving - [10] - 15 cents/foot for 16 gauge.