Tales from a Ventilation Lunatic

[sternwake]

There's got to be more than nitrogen in those cans of dust off, since kids buy and huff them to get high,

Because I cook under the ceiling Delta exhaust fan, it sees cooking grease mist and needs a solvent of some sort, and physical agitation. With 4k+ rpm I'd be worried about brakekleen or similar can based spray solvents weakening/warping the fan blades, or damaging components on circuit board.

The dollar store q tips are .003 cents each, rubbbing alcohol a bit more per capful, and My time is apparently worthless.

Never having bought clear nail polish before, I was dismayed to see the only brand in the CVS was 9$. I am going to coat circuit boards with this from now on as the brush makes application much easier than Amazing goop. and wont screw with component heat removal as much as a big glob of AG would.
AG's tolulene stank takes too long to dissipate as well.

[Blacktank]

check the ingredients of the clear nail polish,a lot of those nail paints are just expensive enamels just like the remover is expensive acetone colored pink

[Snikwahjm]

Dollar store for nail polish.

[sternwake]

Dollar store for nail polish.

Shitballs, didn't think to look there when I was there the other day.

9$ at the CVS would have  been much better spent on two double doubles animal style at In N Out.

[Blacktank]

might want to investigate before adding to a circuit board,quick look and some are enamel,some lacquer,some natural resins

[sternwake]

The clear Nail polish was recommended to me by my electronics Guru friend.

He was against me using the Amazing goop as the solvents inside of it, that evaporate as it cures, could eat the green covering the circuit board, though I have not noticed any issues in the many circuit boards on which I have used it.

I'll make sure the nail polish I bought is Dielectric when cured and that it does not curdle the green protection of the circuit board.

The correct product intended for this task, is something called conformal coating

https://en.wikipedia.org/wiki/Conformal_coating

Since i wasted 9$ at CVS on the clear nail polish, I guess I won't be spending the 15$ on a product actually designed for my purposes.

https://www.ebay.com/sch/i.html?_from=R4...g&_sacat=0

mistakes= learning.

Learn from mine. Save some $

[Scott7022]

Two animal style double doubles...you bastar——

Now my mouth is watering, I am 4000 miles from the nearest in&out and I got a craving Jim Carrol writes poems about.

Could be other stuff in there, canned air, although I remember huffing whip cream making canisters, picture CO2 BB gun canisters, as a kid too. Basically nitrous oxide. Or the stuff the ambulance gives you when you slide down the road after dumping your bike.

Also popular in Amsterdam, sold in balloons on the street corners. Apparently has a stiffing side effect on the male participants besides getting you stoned.


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[sternwake]

I've pulled the impellers from the BDS 140mm fan and the 140Mm 12v Delta, both 38mm thick.

The BDS is an obvious Delta copy. It slows a certain amount then shuts off. I only employed it for a few short months before replacing it with the 24v mother of all fans the 52mm thick version. I never tried to use the accelleroapp to balance it.

The 12v 140mm 'Delta' fan with scythe like blades, is an impostor Delta. Its bearings and hub are smaller than the 120M Delta fans, and the circuit board components appear, from what i can see, much closer to the BDS 140mm fan than any previous Delta fan whose guts I have exposed. Since such a fan does not show up in deltas PDF of offerings, and even though the hub's sticker looks legit Delta, I have to believe this fan is a fake Delta.

I have used amazing goop to completely block off the circuit boards of both these 140mm fans from the fan's hub. I did something similar to the last purchased silverstone fm121, and it had no issues with lack of airflow over the components incurred, but it is a concern with these more powerful fans that consume much more current

The Nailpolish did not pose any issues in the dielectric department nor dissolving the existing varnish covering circuit boards, so both 140m fans got liberal and multiple coatings of it. They should be quite tolerant of humid salty and dusty conditions now , but time will tell.

I had previously attempted to balance the clone 140mm Delta, before I had really refined the method, so started over and this fan is not taking kindly to my attempts. I walked away before achieving anything close to acceptable, so far.

I don't really need these 140mm fans up and running, and should spend my time doing other things. oh well.

I did attach two Jaro fans to the same bucker speed controller attached them to a 8 feet away ciggy plug, a small wooden base so they could not easily tip over, and made a ciggy receptacle on a 12 foot extension 16 awg cord, and gave it to the person Intended to give it to who was stoked on the gift, especially considering the temperatures as of late.

Before I gave the JARO fans away, I was using them on worktable to blow dust towards other fans exhausting the far end of the workshop, and it worked quite well keeping dust from my nostrils without having to wear a dust mask. The 140Mm fans being more powerful, and with the steering vanes concentrating the flow into a column should be more effective in this same use.

[sternwake]

I got the balance of the 140mm 'delta' much better, after starting over again.  The 140mm BDS balance was much better to begin with,  and also easier to improve.

I mounted the 140mm 'delta' next to the BDS 140mm fan on a narrow 40mm wide long piece of wood as a portable footing 'desktop' fan, that I can also easily clamp or screw to various surfaces as needed. Each have their own speed control. and a finger grille on the intake side. Non permanent wiring, each individually can be retasked easily enough elsewhere if/when required without wasting connectors,  or cutting wires, but some small zip ties will goto waste..

These steel grilles are chromed, but rust quickly.  I soaked  a couple dozen of various diameters in Ospho, to etch this chrome coating, and wire brushed and then wiped with Denatured alcohol to prep for maximum adhesion,  and sprayed several layers of black gloss  appliance epoxy rattle can, from each possible angle. Hoping to prevent the rust from forming so quickly.

Appliance epoxy rattle can is weird.  no primer should be used, and apply more coats within a half hour or after a week. It has very good adhesion and scratch resistance, compared to regular rattle can. It still stinky 4 days after spraying so I can see why they say wait a week before recoating.

For the same noise made, the BDS feels like it moves considerably more air, and the 'Delta's' flow from forward  jutting scythe like blades, is not nearly as dense a column but spreads out wider.  The fake delta cranked to  its full speed moves about the same , perhaps slightly more, amount of air, but at considerably more noise/rpm/amp draw than the BDS.
The 'delta' slows to very quiet, the BDS does not.  Both have the dual pot modification,  to dial in minimum possible speed easily with larger fingertwist pot without shutting fan off. The fake delta has a 10 turn pot, kind of a pain in the butt, but am out of 5 and 10K ohm cheapo 3/4 turn pots

Both together on high speed move an impressive amount of air.

I almost mounted the 140mm Noctua industrial next to these two but decided against. It is getting hardened with Nail polish on the portions i can reach and will then use amazing goop over the whole wire entry. The Noctua does not use dual ball bearings, some sort of magnetic hydrodynamic bearing... and I do not think I could remove impeller without damaging it, for better access to circuit board to protect it from corrosion and dust impaction better.  Not ssure how/where/ when I will employ the Noctua 140mm 3k rpm industrial.  but could do something similar as the side by side 'desktop' fans.

I might mount my remaining untasked  120mm fans in a similar manner side by side.
I'm looking to eliminate a 120vAC 20 inch box fan from workshop exhaust duties. Rather run fans from solar than from the grid during daytime. Don't have extra inverter to power box fan. Hate inverters anyway.
I also have very powerful 80 and 60mm fans that each need a task.  perhaps as forced cold air intake for my alternator.......

[Scott7022]

Ah the plot thickens...


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