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How to gauge the ohm when coiling?

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18sign

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Feb 27, 2014
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Haha. Ya thanks guys.
Btw how often you guys rebuild it?

Well if I'm satisfied with the coil, usually I will just change the cotton or wick, wash with the coil intact and pulse the coil a few times to burn off any impurities and wash and pulse then just replace the wick and start vaping a new flavor. Do remember to check the ohms of course before you pulse.
 

mackman

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Here's a chart that gives the resistance of different gauge wire based on 1 foot length: Kanthal A1 Resistance Wire (AWG 24, 26, 28, 30, 32, 33 & 34 - 3 Feet). Pretty easy to figure the resistance based on the length of your wire.
Another easy method is to unroll some wire from your spool and put the leads from an multimeter on the length you will use. A little practice it becomes second nature.
 

DragonSG

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Useful site on coiling for all your needs, Coil wrapping | Steam Engine | free vaping calculators

Good for novice to accelerate quickly towards advance users.

Takes into account on and lets you enter:
coil gauge, material and profile
inner diameter, - the diameter of rod used
type of coil - single/dual/triple/quad
Target resistance, and even
Leg length


It then summarise into a instruction on how to wrap: E.g.
Summary – how to wrap it
Resistance wire length (contact points not included) 63.2 mm
Number of wraps 10.23
— rounded to "full wraps" 10
— rounded to "half wraps" 11/10
Leg power loss 7.9%

the leg length is important cuz it lets you understand what is leg loss and importance of keep leg as short as possible. At lower resistance, a leg length of 10mm can easily result in >30% loss in power as heat.

Ttested using many times and it shows high degree of accuracy.

Once you look at how the parameters changes, it answers many questions on what/how/why etc.

Have fun!
 
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