120V Heatbed: Difference between revisions
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==Uncoated 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]]. | *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]]. | ||
*Wire sleeving - [https://www.cableorganizer.com/fiberglass/] - 15 cents/foot for 16 gauge. | |||
Revision as of 22:30, 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.
- Wire sleeving - [10] - 15 cents/foot for 16 gauge.