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Calculating necessary wire lengths
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TropicalSlug Offline
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Post: #1
Calculating necessary wire lengths
Hello all! Can anyone tell me a way to measure how much wire I need for any particular coil? I've gotten quite good at building over the past few months, but I find myself frequently cutting too much or too little when I build more intricate coils. Is there a formula I could use? Thanks! 
20-04-2017 10:50 PM
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gentlydoingit* Offline
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Post: #2
RE: Calculating necessary wire lengths
Steamengine has a wire length guide, you'll need to add a bit to compensate for the drill/swivel lengths. 

Tbh, I cut a slot into the spool side wall and count one wrap of the spool as a 5 wrap coils worth, then pull the wire tight into the afore mentioned slot before I cut off my desired length.. measuring an average length and securing the wire to the spool in one shot Wink

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21-04-2017 12:01 AM
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bibliora Offline
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Post: #3
RE: Calculating necessary wire lengths
Here's the link for Steam Engine. It is a great tool.
... Steam Engine Ohm Calculator

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Bibliora aka Torrey Girl_wink
21-04-2017 12:03 AM
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Fatboy Online
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RE: Calculating necessary wire lengths
TS, great question. I'm not familiar with a specific formula but being frugal I conquered that same issue/dilemma by taking a small strip of string/twine and wrapped it on the screwdriver or jig to establish length required then added an extra cm or two. I prefer to spend my hard earned money on RDA and mods vs on wasting wire. Tongue
Coincidentally my lesson learned was when I spent several hours doing a triple core fused and then built a few coils and found the remainder wasn't enough for a 3rd coil....a better calculation would have saved me time, something else I prefer not to waste! Tongue
21-04-2017 12:17 AM
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Don Offline
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Post: #5
RE: Calculating necessary wire lengths
I always use the Steam Engine calculator Torrey linked to.

Among other things it gives a sanity check for the length of wire involved.

It has most of the wire types you are likely to come across built in.

It is also handy for getting coil profiles for TC to plug into DNA chipsets.

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21-04-2017 07:02 AM
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TropicalSlug Offline
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Post: #6
RE: Calculating necessary wire lengths
@gently & @fatboy, thanks for the advice, I don't know why it hadn't occurred to me to do the same thing with twine or string! Also, I didn't realize steam-engine had a wire length calculator, I mostly just use wire wizard. Finally I won't accidentally use half a spool when I don't need it! Thanks Big Grin
21-04-2017 03:14 PM
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Fatboy (04-21-2017)
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Post: #7
RE: Calculating necessary wire lengths
Trop, the benefit to the string is that you don't need a ruler or measuring tape....get the length required, place it against the wire and you're done. Tongue
21-04-2017 10:30 PM
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