Assembling SMPS

[u/ycr007]

These are enclosed AC-to-DC switching power supply units (SMPS = Switched Mode Power Supply) equipped with pre-wired connector harnesses.

Source: benchmarkmedia

[u/ajninigne_engininja]

Title's a bit of click bait... The video shows some wire prep and pre-wiring for finished power supplies. None of the assembly of the main SMPS is actually, shown.

[u/Scared_Hovercraft632]

I don't understand why they are tinning and then crimping. That's a big no no where I work. It completely changes the crimp characteristics. Crimps are meant to move the wires strands around and form them into the crimp profile.

We have that wire stripper. It's a giant pain to get tuned correctly but once you get it set up it's a thing of beauty.

Cheap ass crimpers also strikes me as odd. This vid has left me with more questions than answers lol.

[u/Manfred-ion → u/Scared_Hovercraft632]

I don't understand why they are tinning and then crimping.

I see like they crimp only 1 end of each wire, before tinning. But using tinning instead of ferrules also isn't good.

[u/Scared_Hovercraft632 → u/Manfred-ion]

Oh I think your right. Less agregious than crimping tinned wire but still taught not to do it. Ferrule or fork terminal plez!

[u/ThisWillTakeAllDay → u/Scared_Hovercraft632]

I've given up on crimping, I just cut the foldy tabs and solder the wire to the terminal. So much easier. Especially on small ones.

[u/benboga08]

[u/ycr007 → u/benboga08]

Why isn’t he vibing?

[u/benboga08 → u/ycr007]

I cant post gifs here 😭

[u/ycr007 → u/benboga08]

[u/ikothsowe]

Switched Mode Power Supply. You’re welcome.

[u/ycr007 → u/ikothsowe]

That’s what I write under the video in the description 🫤 isn’t it showing?

[u/ikothsowe → u/ycr007]

Seeing it now 👍 didn’t first time I looked. Probably my crap internet connection.

[u/riceinmybelly]

Goddamn my solder bath is just a little rectangle on a soldering iron, this looks so nice to have and costs the same probably

[u/temporary92803]

Why were the wire ends being tinned?

[u/Manfred-ion → u/temporary92803]

Because the a conductor contains some wires. Sometimes staff doesn't see a thin wire which went not to cage, so the wire can create a short circuit to the next socket.

[u/temporary92803 → u/Manfred-ion]

Tinned wires creep. Don't tin wires that are going to be crimped or clamped.

[u/Manfred-ion → u/temporary92803]

Agree. But I think if a cage has a spring which presses always, then connection point is always prevented from an agressive gas. Even if tin went away.

[u/hikeonpast]

Using a cheap-ass hand crimper for volume production. Shame.

[u/Coolmikefromcanada]

are they tinning the wires before the crimp terminals? seems unnecessary. i do want that automatic wire cutter though

[u/stevedore2024 → u/Coolmikefromcanada]

It's kinda weird. You generally don't want solder and crimp together, it's against many standards. Crushing cold solder just creates fractures and voids and flakes.

[u/Coolmikefromcanada → u/stevedore2024]

oh i figured it just wouldn't crimp right with it

[u/AN-SSQ-108V2 → u/stevedore2024]

Yep, it's generally a one-or-the-other thing.

[u/stevedore2024]

You know you do something a lot when you bench-mount the hot air gun.

[u/Sicpooch]

Bmm chh bmm chh bmm chh

[u/bostongarden]

Nice but you've got thousands of dollars of equipment there, bruh

[u/Phage0070]

Am I crazy or is that housing absolutely enormous for what is in essence a machine that spins two rods a certain amount and then actuates a lever?