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Coils
MDC Offline
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Post: #11
RE: Coils
(10/01/17 02:21 PM)HeyJoe Wrote:  
(10/01/17 01:58 PM)nisam Wrote:  
(10/01/17 01:52 PM)HeyJoe Wrote:  I will redo it and make sure it's not touching anywhere it shouldn't. I got it from the Crazy Wire Company. I suspect I'm making noob mistakes but I thought I'd ask to know where to look. thanks.

You can't do much damage with a poor coil on a regulated mod, but it's good practice to build neatly and carefully, which will also give a more effective coil.

I'd definitely check the resistance of a length of wire as it's quite possible the spool is incorrectly labelled.

How do you turn the coils and keep the the legs perfectly straight without kinking ad bending them whilst turning... mine wasn't very straight.

I'll check the resistance of a sample... how long should it be? Is it that length that Steam Engine shows and is that for an uncoiled piece? I know bugger all about this. Smiling

Yes. That length should be the amount required to make the whole coil and legs, but not including the bit trapped under the rubber bung.
10/01/17 03:23 PM
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nisam Offline
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Post: #12
RE: Coils
(10/01/17 02:21 PM)HeyJoe Wrote:  How do you turn the coils and keep the the legs perfectly straight without kinking ad bending them whilst turning... mine wasn't very straight.

I'll check the resistance of a sample... how long should it be? Is it that length that Steam Engine shows and is that for an uncoiled piece? I know bugger all about this. Smiling

I can't really answer the first question as it's something I do without thinking.

Any electrically resistive wire has a known resistance, which can be easily calculated for a set length of a known diameter. I'm not sure if steam engine provides this information, but Google will find it easily enough. All you need to do is check the resistance of a measured length of your wire, to ensure it provides roughly the same resistance as 0.28 should. If the figures are very close then you can rule out this wire as being the problem. If the figures are very different, you'll feel better about that first coil having such a high resistance.

It's been a few years since I've rebuilt a Kanger head, but MDC might have some salient information.

Edit: he has already seen the thread Smiling
10/01/17 03:49 PM
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Izan Online
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Post: #13
RE: Coils
(10/01/17 02:21 PM)HeyJoe Wrote:  I'll check the resistance of a sample... how long should it be? Is it that length that Steam Engine shows and is that for an uncoiled piece? I know bugger all about this. Smiling

HTH
─░mage

Cheers
I

(This post was last modified: 10/01/17 03:54 PM by Izan.)
10/01/17 03:52 PM
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HeyJoe Offline
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Post: #14
RE: Coils
(10/01/17 03:52 PM)Izan Wrote:  
(10/01/17 02:21 PM)HeyJoe Wrote:  I'll check the resistance of a sample... how long should it be? Is it that length that Steam Engine shows and is that for an uncoiled piece? I know bugger all about this. Smiling

HTH


Cheers
I

Thanks.
10/01/17 05:34 PM
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MDC Offline
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Post: #15
RE: Coils
(10/01/17 05:34 PM)HeyJoe Wrote:  
(10/01/17 03:52 PM)Izan Wrote:  
(10/01/17 02:21 PM)HeyJoe Wrote:  I'll check the resistance of a sample... how long should it be? Is it that length that Steam Engine shows and is that for an uncoiled piece? I know bugger all about this. Smiling

HTH


Cheers
I

Thanks.
So, if your wire is 0.28mm Kanthal A1, a 10cm length should be about 2.35 ohms.
10/01/17 07:15 PM
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HeyJoe (10/01/17)
HeyJoe Offline
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Post: #16
RE: Coils
(10/01/17 07:15 PM)MDC Wrote:  
(10/01/17 05:34 PM)HeyJoe Wrote:  
(10/01/17 03:52 PM)Izan Wrote:  
(10/01/17 02:21 PM)HeyJoe Wrote:  I'll check the resistance of a sample... how long should it be? Is it that length that Steam Engine shows and is that for an uncoiled piece? I know bugger all about this. Smiling

HTH


Cheers
I

Thanks.
So, if your wire is 0.28mm Kanthal A1, a 10cm length should be about 2.35 ohms.

On my device, done in a loop 2.2 -2.3 ohms that's about right issn't it?
10/01/17 09:31 PM
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MDC Offline
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Post: #17
RE: Coils
(10/01/17 09:31 PM)HeyJoe Wrote:  
(10/01/17 07:15 PM)MDC Wrote:  
(10/01/17 05:34 PM)HeyJoe Wrote:  
(10/01/17 03:52 PM)Izan Wrote:  
(10/01/17 02:21 PM)HeyJoe Wrote:  I'll check the resistance of a sample... how long should it be? Is it that length that Steam Engine shows and is that for an uncoiled piece? I know bugger all about this. Smiling

HTH


Cheers
I

Thanks.
So, if your wire is 0.28mm Kanthal A1, a 10cm length should be about 2.35 ohms.

On my device, done in a loop 2.2 -2.3 ohms that's about right issn't it?

Near enough! how about stretching out your dodgy coil, see how long it is? Then measuring it again if length is correct. Should be about 6cm including legs for 1.4 ohms. Maybe 6.6cm including the trapped wire lengths.
10/01/17 09:46 PM
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nisam Offline
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Post: #18
RE: Coils
Wire sounds fine, so either coil or installation of coil.

Follow the above advice and you rule out one or the other.
10/01/17 10:23 PM
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HeyJoe (11/01/17)
QuinnDexter Offline
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Post: #19
RE: Coils
If it's a touching coil (microcoils they are sometimes called) try gently, but firmly running your fingernail or your tweezers/screwdriver along the length of the coil a couple of times when it's cold as if you were strumming it, then try firing it again. Touching coils work best when there's a layer of oxide insulating each loop from the next. If there's bare metal touching between loops that can throw the resistance off.

10/01/17 11:36 PM
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HeyJoe (11/01/17)
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Post: #20
RE: Coils
Second attempt, I made another coil with 6 wraps at 2mm ID and it started at 1 ohm and settled at 0.9. It tastes spot on starting it at 8w. I didn't squeeze the coils together this time.

Third attempt, on my other Aerotank and other MVP 20w I got 1.5 Ohms with 7 wraps. I think that's about it... near enough to 1.4. The other one with 6 wraps and running at 0.9ohms tastes a bit smoother, a bit sweeter and more rounded.

I think the variation in taste is that i'm still learning to be consistent with rolling the wick.

Thanks for all the information. I have to say you guys are tops. Smiling
11/01/17 06:16 AM
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