Screws People, Check Your Screws!

[ShowerHead]

Ok, it should be obvious, but I'm not one who pays attention to the obvious.

I have some Aromamizer Plus tanks and got the velocity deck for them.
I cleaned them, twirled up some coils, noticed the resistance was weirdly high. Then it started changing. Took the coils out and inspected the insulator, it looked fine. Chalked it up to a funky build box.
Put it on my mod, same bouncing resistance.
Replaced grub screws. Same moving resistance.
Took the coils out and replaced it with a store bought coil of known resistance. No joy.

Finally, as the deck was laying on my table, I noticed the 510 pin screw on the bottom of the deck.
It was about one turn loose on both. Tighten them, presto, good resistance readings.

When all else fails, check the obvious.

 

[DaveP]

Ok, it should be obvious, but I'm not one who pays attention to the obvious.

I have some Aromamizer Plus tanks and got the velocity deck for them.
I cleaned them, twirled up some coils, noticed the resistance was weirdly high. Then it started changing. Took the coils out and inspected the insulator, it looked fine. Chalked it up to a funky build box.
Put it on my mod, same bouncing resistance.
Replaced grub screws. Same moving resistance.
Took the coils out and replaced it with a store bought coil of known resistance. No joy.

Finally, as the deck was laying on my table, I noticed the 510 screw on the bottom of the deck.
It was about one turn loose on both. Tighten them, presto, good resistance readings.

When all else fails, check the obvious.

That's true! You may have hit a machining artifact and thought the screw was tight when you coiled it.

Grub screw threads on many Velocity build tanks can be poorly cleaned and most are probably not wire brushed in the factory. Running them all the way in and back out before building is probably a good practice to chase the threads and polish them up a little.

 

[Opinionated]

I would have thought taking that thing apart and putting it back together after cleaning and prior to building would have caught that, but we all miss things! No one's perfect.

Yes I agree, the answer is usually right in front of our faces the whole time!

 

[DaveP]

Grub screws sometimes feel like they hit bottom when new and it's just a tiny aberration in the threads that cleans itself up when you run the screw all the way in and out once or twice. As good as Chinese QC is, some robot machine probably dumps thousands of grub screws and other parts in a bin with no time in the grit polish and wash station.

 

[Petabread]

Yea, this was a preoblem with the Pharoah RTA. Everybody that I knew that had one said the same thing that I noticed...the 510 pin comes to you loose. I'm glad you pointed this potential issue out to other people!