Electronics > Manufacturing & Assembly

Tearing my hair out with a Chinese PCB company

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james_s:
Nobody is trying to assassinate your character. We are just pointing out that you seem to have a history of trying to do things in a nonstandard way then having problems. The issue here is not them, it is you, or rather your peculiar workflow. Follow the standard workflow like everyone else does and you will stop having these problems.

peter-h:
"When you're happy and want to order the production quality you go back to JLC and click "reorder" and enter in 100/1k/whatever quantity. That way you know that the same data has been used to fab both boards."

JLC are too expensive for production work. Also, very limited ability to communicate in English. If you can't specify the job via the form on their website, it may come back "different". The other day I ordered 10 circuits and got back 10 panels of 10 circuits :) Clearly I did something "wrong", but this would never happen in conventional PCB purchasing where you specify the panel layout, overall panel size, breakout tab detail (with photos), etc.

"Nobody is trying to assassinate your character"

Going back over somebody's old posts and digging up some other thread where that person got beaten up for something, is typical crappy social media behaviour. One sees it all over the place. Too many people with too much time on their hands... It's like you go on e.g. some snowboarding forum asking a question about snowboards, and a load of people dig up that you made a post in the off topic section, on brexit, and then beat you up, like a load of kids, in the snowboard section :) :) (I don't snowboard, btw).

I don't think you and some others have even read my posts and the reasons for doing the BBT comparison. To say it yet again: it is to try to eliminate the risk of populating say 1000 boards (a 5 digit GBP figure) after a change of PCB manufacturer. I have been doing this routinely for many years.

Anyway, this question is clearly not going to be answered. I was wondering if there was a BBT machine which somehow cannot test more than one board. I suspect this time that this company subcontracts the BBT and doesn't want to get involved, so is pretending they don't understand. It is a not uncommon Chinese tactic. They know that you will never turn up at their door.


ataradov:
Why are you inventing crazy theories when there is a good explanation. This kind of behavior is exactly why they won't do your requests. Even if they do it and something does not work, you will come up with some theory to explain it, after all " It is a not uncommon Chinese tactic".

thinkfat:

--- Quote from: Kean on October 26, 2021, 05:26:19 pm ---As mikeselectricstuff and free_electron have pointed out, and from what I've seen myself of BBT machines in some factory tour videos, the BBT machines will often work with a larger production panel rather than a customer "sub-panel" for higher efficiency.  Less manual handling.

I actually had a video sent to me of testing a board produced for me.  It had passed all BBT but had a shorts on an internal layer.  It turned out they had a bug in their gerber processing tool for combining boards into production panels.  The short was basically a line that ran right through the programming header, but only on some of the "sub-panels".  Because the short was in the production panel gerber data, it passed testing.  It was visible with back lighting, but annoyingly I'd already populated a few boards which failed before discovering it.

--- End quote ---

That's a good example why it's prudent to verify boards before ordering in big quantities, even if the Gerber data is known-good. But also a caveat that even automated tests at the manufacturer might not save you.

thinkfat:

--- Quote from: peter-h on October 27, 2021, 07:07:16 am ---Anyway, this question is clearly not going to be answered. I was wondering if there was a BBT machine which somehow cannot test more than one board. I suspect this time that this company subcontracts the BBT and doesn't want to get involved, so is pretending they don't understand. It is a not uncommon Chinese tactic. They know that you will never turn up at their door.

--- End quote ---

On the contrary, it has been answered. You're probably not getting the size of the operation you're dealing with. Maybe watch a video about JLCPCB's automated manufacturing line, Scotty from Strange Parts has done a tour of their facility a while ago, so go and check his Youtube channel. Then you might understand why what you ask is unreasonable for them.

It might also be that the shop you're trying to contract is just an aggregator. They might not have any manufacturing capabilities themselves and thus simply cannot do what you ask for.

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