Electronics > Manufacturing & Assembly

Blu-tak used in metal cased PSU assembly?

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Kean:

--- Quote from: TomS_ on December 08, 2021, 09:22:38 am ---I don't understand why the washers are going between the PSU and the base if the screw holes are too big. Surely they should be going between the screw head and the base? What am I missing here?
--- End quote ---

Hmmm... I missed that.  It makes no sense as described.  I assumed he needed them as a spacer.

Faringdon:

--- Quote ---don't understand why the washers are going between the PSU and the base if the screw holes are too big. Surely they should be going between the screw head and the base? What am I missing here?
--- End quote ---
Thanks...it must be flush with the base...nothign jutting out externally....so its counter sunk screws, and washer inside.

jpanhalt:

--- Quote from: Faringdon on December 08, 2021, 07:35:38 pm ---
--- Quote ---don't understand why the washers are going between the PSU and the base if the screw holes are too big. Surely they should be going between the screw head and the base? What am I missing here?
--- End quote ---
Thanks...it must be flush with the base...nothign jutting out externally....so its counter sunk screws, and washer inside.

--- End quote ---

A hat washer (rim inside the enclosure) or presses nylon bushing will do that.  Can you post a drawing so we aren't guessing what you want?

I love working on mechanical puzzles, but in light of this post:

--- Quote from: Faringdon on November 30, 2021, 11:03:17 am ---
--- Quote ---Faringdon is again on the "other side of the world" train.
--- End quote ---
Not at all.
Read the top post, this is no fault of the other side of the world.

In fact, as soon as i found out the pilot was in good health, i , with my pals, actually toasted and celebrated that F-35 getting sunk to the bottom of the sea!
...You forget that i myself operate a Far Eastern Electronics importation business, so do many of my pals.
Last year i made £35.4 million profit for myself (not anywhere near as much as my mates though)...not bad for sitting about and placing a few orders now and again.....i dont even have to see the products....just get them sent straight to customer.
Thats why, when we found out the pilot was good, we toasted the sinking of the F-35....after all, the situation surrounding it (the destruction of the Western general electronics industry) ...is the reason i get minted for doing very little! All legal!
Most westerners thank me for bringing in  "cheap products" for them...but they dont realise that i take a huge chunk of the money involved all for myself...as much as i can get away with.....and as general electronics in the west diminish's further, and as western manufacturing facilities get further reduced, i, and my pals, stand ready to ratchet the prices up as high as we possibly can. Cheers!

--- End quote ---
I wonder why you haven't just assigned the problem to someone else.

nali:

--- Quote from: jpanhalt on December 08, 2021, 08:38:17 pm ---I love working on mechanical puzzles, but in light of this post:

--- Quote from: Faringdon on November 30, 2021, 11:03:17 am ---[snip fantasy stuff]
--- End quote ---

--- End quote ---

Wow... I hadn't even bothered reading that thread. In an earlier post I wondered about OP's motivation for some of his posts. Now I'm sure - definately a Walter Mitty.

WRT the washers - sounds like they're using counterunk screws too large for the panel thickness.

jpanhalt:

--- Quote from: nali on December 08, 2021, 09:44:22 pm ---WRT the washers - sounds like they're using counterunk screws too large for the panel thickness.

--- End quote ---

If that's the case, get undercut CSK screws.  Are they sure the correct angles are being used.  There are several possibilities from about 82° to 135°.  I believe 82°, 90°, 100°, and 110° are most common.   

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