jlcpcb through hole soldering service - Page 1
Forum section: electronics / general

author: seandepagnier
author_rank: Newbie
timestamp: March 18, 2021, 05:30:54 pm
content: added a few weeks ago, it offers a variety of connectors. This can reduce/eliminate hand soldering on many designs, but is it then instead just people in china hand soldering for 2 cents a connection?? It seems an almost unfair wage if this can be true? Or do they program a machine to do it if you have many boards?

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: March 18, 2021, 05:43:27 pm
content: Typically wave soldering.If there is bottom mounted SMD stuff, then assembly adhesive instead of solder paste and then still wave soldering.

author: phil from seattle
author_rank: Super Contributor
timestamp: March 18, 2021, 07:20:58 pm
content: I have yet to see any reports from people using this service. Also, I still don't see any guidelines for TH assembly. One thing that is unclear to me is where is the center of a lot of TH (and even some SM) components. The datasheets are often unclear.It isn't clear to me that they will use wave soldering. For a 10 board run, I doubt they will. I can do at least 10 pins a minute at home (including placement). So that is $12/hr (60*20*.02). Pretty sure their assemblers do far better than I can.I plan on giving it a try at some point. Maybe just adding a USB connector or some such.

author: seandepagnier
author_rank: Newbie
timestamp: March 18, 2021, 08:45:38 pm
content: I tried and so far the website ignores the part numbers marked for hand soldering. It may not be functional yet.

author: ve7xen
author_rank: Super Contributor
timestamp: March 19, 2021, 01:10:45 am
content: Steve at SDG Electronics had a couple of PTH placements on one of his projects a couple weeks ago. He does say it's hand done.

author: Kean
author_rank: Unknown
timestamp: March 19, 2021, 01:10:52 pm
content: Almost certainly hand soldered.Wave soldering requires special PCB layout techniques and the direction of the wave pre-planned. Things like QFP parts placed at 45 degrees, SOIC parts with larger "theiving" pads at the corners, etc.It also likely requires a custom carrier/pallet made from high temperature material to carry the board across the wave, use of red glue, foaming flux, and board washing. Not practical for low volumes.See EEVblog #431

author: mskeete
author_rank: Contributor
timestamp: March 19, 2021, 02:30:27 pm
content: On my last SMD boards, JLC soldered some connectors for me.The results looked so "normal" I didn't think it was wort posting about

author: jziegler
author_rank: Newbie
timestamp: March 19, 2021, 04:01:29 pm
content: I had boards assembled (first time using JLC at all) that had some connectors included. I suspect they are hand soldered. I haven't tested the boards yet (need to do a little software work for that), but they look pretty good.

author: cheater
author_rank: Regular Contributor
timestamp: March 23, 2021, 04:23:58 pm
content: Have you got any photos?

author: DanyD
author_rank: Newbie
timestamp: January 05, 2023, 07:06:17 pm
content: I konw this is an old topic but this may help someone in the future. I looked on internet for information on how to ordre through hole pcb assemblies with jlcpcb but did not find much.I recently ordered assembled pcb's with smd and through hole components with jlcpcb. The process went very smoothly, basically I followed the tutorial made by Phil's Lab on youtube about smd assembly with jlcpcb.I used kicad for designing the pcb. The BOM and the Footprint position file included both the smd and thought hole components.In kicad, I had to modify the footprint of the thought hole components:-Change the fabrication attribute of each through hole component from "through hole" to "surface mount". This will include the through hole component in the footprint position file.-Change the origin (0,0) of each through hole component from pin 1 to the center of the component. (JLCPCB want the position of the center of the component, not pin 1)Remember to have a clear silkscreen especially for components that are directional and that can be installed backward.The through hole parts are put by hand. I'm not sure what they follow for assembly instruction, maybe they print the 2D/3D view.Here are some pictures of my board. All solder joint look good and uniform except for one on the IDC connector (there is a blob on the joint). I can't tell if the board was wave soldered or hand soldered. I suspect that they wave solder since all joints are uniform and there is minimal flux residue.