Drag-soldering Surface-mount components

RE: Drag-soldering Surface-mount components

Jan Cumps — Fri, 04 Feb 2022 14:25:17 GMT

I added a gull wing tip in my project14 shopping cart.

It's model XNT GW1/T0054485499. For the Weller WHP 65 solder iron.
This is a pencil for small work. I'm not expecting that the well of this tip will be able to contain a lot of solder.
I'll share results once I tried it.

RE: Drag-soldering Surface-mount components

jimmy47 — Mon, 01 Mar 2021 01:52:49 GMT

How about a little heat sink paste under the chip to hold it in place, + heat sinking a little if needed? Great video.

RE: Drag-soldering Surface-mount components

Fred27 — Thu, 14 May 2020 11:12:55 GMT

These are all great tips for home / semi-pro board assembly.

I visited a very professional outfit last week. I was really jealous of their automatic stencil printer, pick and place machines and vapour phase oven. [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-33b49960-8f40-4cb3-95c2-1a9b4b9de815/contentimage_5F00_3708.png:16:16]

RE: Drag-soldering Surface-mount components

memyselfandi — Thu, 14 May 2020 10:58:31 GMT

Nice work and write-up, shabaz. Thanks for taking your time for the creation of the videos.

Here are a few more tips:

Related to brushes:
- Take a regular, quality paint brush of your preferred size and cut off the brush with a sharp knife or cutter.
  That shall leave about 3 to 4 mm left of the original length.
- This creates a stiff brush, which in combination with IPA alcohol forms an excellent tool for cleaning grime, oil and flux residue.
- New tool comes at a fraction of the costs of "professional" brushes.
I have always found the following video material very informative:
https://www.youtube.com/watch?v=Y2AeDGXCwU0 from John Gammell
and the material from Pace here: https://www.youtube.com/watch?v=LNp0pASpgOI
The "classic" videos from Pace on THT, cable joints etc. are also worth a look.

Happy soldering.

Cheers,

M.

RE: Drag-soldering Surface-mount components

ralphjy — Tue, 12 May 2020 14:25:24 GMT

Great job!! Can't wait to see a video [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-33b49960-8f40-4cb3-95c2-1a9b4b9de815/7725.contentimage_5F00_1.png:16:16].

I can see that with a lot of pins in a row that this can save a ton of time. I've always done the individual pins one-by-one, but probably because I haven't needed to do large parts. I also haven't tried assembling my own boards - just rework. I think some PCB design/fabrication/assembly might be a goal for this year.

RE: Drag-soldering Surface-mount components

dubbie — Tue, 12 May 2020 10:27:53 GMT

Shabaz,

You have achieved a very good outcome, very impressive to achieve such consistency.

Dubbie

RE: Drag-soldering Surface-mount components

Andrew J — Tue, 12 May 2020 08:42:14 GMT

How do you test the connections once soldered Shabaz? I’m always concerned that solder has bridged under the chip that braid or dragging doesn’t pull out, or that a pin that looks soldered actually isn’t.

RE: Drag-soldering Surface-mount components

Fred27 — Tue, 12 May 2020 07:59:01 GMT

I also find that if I'm trying to sort out a solder bridge (normally after reflow when there was too much paste) that dragging along the pins away from the IC works well too. QFN is my nemesis these days! Very limited possibility of drag soldering there.

RE: Drag-soldering Surface-mount components

mp2100 — Tue, 12 May 2020 01:48:15 GMT

Good to know. . . But I’m not familiar with gull wing / spoon tip. Is it this? Interesting soldering tip. (Nice Tip.) [View:/resized-image/__size/900x600/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-33b49960-8f40-4cb3-95c2-1a9b4b9de815/contentimage_5F00_206986.gif:900:600]

RE: Drag-soldering Surface-mount components

jw0752 — Tue, 12 May 2020 01:45:54 GMT

It sure looks pretty!

John