Help with rising resistance

[Zutankhamun]

Hello. This is not a gradual increase over time.
The atty is a heron V1.
I’ve been struggling for so long and I’m close to fixing it but it’s not quite perfect.

I’ve soaked it, scrubbed it, replaced insulators for 510 pin, the positive post. I’ve swapped both pos pin and 510 screw. Tightened the post so much to try and help. Built it what feels like hundreds of times. Swapped the delrin piece inside and the ss contact, tightened screws.
Moved the 510 screw up and down so much it’s not even funny

The resistance rises from 1.15 when I first screw it on to 1.20 while the firing buttons held. The the kanthal cools and it’s back to 1.15 after a few secs

Any tips for something I’ve missed? Please
Thanks

 

[sonicbomb]

Good news. A change of 0.05 ohms is not really of any consequence and you should not worry about it.

 

[Dubminer]

Hello. This is not a gradual increase over time.
The atty is a heron V1.
I’ve been struggling for so long and I’m close to fixing it but it’s not quite perfect.

I’ve soaked it, scrubbed it, replaced insulators for 510 pin, the positive post. I’ve swapped both pos pin and 510 screw. Tightened the post so much to try and help. Built it what feels like hundreds of times. Swapped the delrin piece inside and the ss contact, tightened screws.
Moved the 510 screw up and down so much it’s not even funny

The resistance rises from 1.15 when I first screw it on to 1.20 while the firing buttons held. The the kanthal cools and it’s back to 1.15 after a few secs

Any tips for something I’ve missed? Please
Thanks

Perfectly normal for it to rise a bit then drop when it cools down.

 

[Topwater Elvis]

Sounds like you're chasing your tail for no reason.

It is true kanthal resistance varies the least due to heating when compared to other wire types.
But, it does vary slightly when heated,, .05Ω, five one hundredths of an ohm, 5/100 is nothing at all to be concerned about.

 

[Zutankhamun]

Thanks but this particular atty never ever did that before.

Thanks anyway

 

[Topwater Elvis]

All using the same ohm reader / power device?
.05 of an Ω is well within range of what could be considered normal.
I see variances in resistance using kanthal of .008Ω ~ .051Ω due to heating all the time, like usual, normal, to be expected with everything I use.
If used on a regulated device it won't have any effect on vape quality, at all.
If you're using a mechanical where .05Ω makes a concerning difference in battery amp draw you're way too close to the edge to begin with.

.05Ω variance could be caused by a variety of reasons, machining tolerances, dissimilar metals trap screws vs coil mount, dissimilar metals in 510 connection points & threading, 7 specs of dust or 1/16 of a drop of liquid in 510 connection points, etc...

 

[Zutankhamun]

^ lol. Thank you very much.

I prefer mechanical mods with this atty but it has been relegated because the pos post insulators had to be swapped over because it was shorting out. Haven’t used it for a year.
In that time it was dropping serious resistance to the point it was dangerous to put it back on a mech.
I’ve been attempting to fix it and I want a solid reading so I no longer worry about that.
It changes a tiny bit evertime a take the atty off and screw it back down.

Now just for the sake of this argument. The Gp dripper went on the same reg (VS rdna 60) just to check if it stays the same.
Same kanthal and it sure does.
Sub but kind of high. 0.65 beginning to end after puffs and pulses, reseating and taking the atty off and on again.

 

[AzPlumber]

Some get lost in the numbers, how does it vape?

 

[Zutankhamun]

It’s a slightly disappointing vape. Because my other attys stay dead on the resistance I built it at. This has had a history of a pair of wrecked insulators and dropping significant numbers. I can’t put it on my favourite device any more.
So, not fantastic

 

[untar]

I don't quite remember but wasn't that kind of an overengineered atty? Like in made of 200 parts, M20 threads and 510, all that shizz?
Wouldn't be surprised if you find your .05Ω somewhere in those connections.

 

[Zutankhamun]

A little, but not loads. Nothing out of this world. You are correct though. It is somewhere in that where the res is creeping around.

Inside the deck is a negative post which is not milled in so that’s one. Two pieces of insulation around the pos post.
The bottom of the pos hits a ss cap which contacts the 510 so it is a little busy.

 

[Izan]

Hi mate,
Do you get the same "creep" when using the 20X1 connection or only the 510?

Cheers
I

 

[untar]

My bet would be on the spring sitting over that M20s floating pin. There's one in there, right?
Is it squeaky clean and the contact areas as well?

 

[Zutankhamun]

I couldn’t get hold of the gpin!!!
I got one of the last which was one of the first (#13) I think that may have been part of the issue.

With the ‘creep’ I’m worried about the hybrid anyway which is what I always wanted.

 

[Zutankhamun]

My bet would be on the spring sitting over that floating pin. There's one in there, right?
Is it squeaky clean?

There isn’t. It’s the 510 so it’s an adjustable 510 but it’s so exact that I think I might buy another brass screw with a shoulder measuring M2x?mm (possibly 9) which is incredibly hard to find

 

[ScottP]

It’s a slightly disappointing vape. Because my other attys stay dead on the resistance I built it at. This has had a history of a pair of wrecked insulators and dropping significant numbers. I can’t put it on my favourite device any more.
So, not fantastic

Seriously with a history of problems like that I wouldn't ever put it back on a mech. It just isn't worth the possible result. Either keep it regulated or take to your nearest scrap metal dealer and see what you can get for it.

 

[Zutankhamun]

When I say history, I mean it happened once.
If I can fix it so it’s set again I’ll have no problem with it.
If it’s fixed, it’s fixed

 

[Izan]

I have a Spheroid V4 and think the weak link is the 510 screw. The threads are very fine and feel easily striped.

If you find a source in Stainless Steel, please share. I'll do the same.

Good luck
I

 

[Zutankhamun]

@Izan
Absolutely will do.
With a ruler it measures about 9mm in total?
Have a look and see if you think that. I was going to add a ml or two to it so it’ll have a stopping point.
It’s an M2 by the way.

The shoulder seems to be 5mm with the threading taking up about 3.5-4mm

 

[untar]

I think you need a buddy with a lathe for that, no chance someone has that thing sitting on their shelf (unless it's the replacement part obviously ).