Electronics > Manufacturing & Assembly

Tearing my hair out with a Chinese PCB company

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48X24X48X:
It is almost 100% that PCB companies will tweak your gerber to better suite their manufacturing capabilities. But, they are usually done in order to ensure it fits their manufacturing capabilities limits and also provide a better head room if possible. So, definitely PCB factory A and B will not manufacturer a 100% same exact output. But, having said that, it doesn't mean an assembled board from 2 different factories would give very different results unless you are doing some application that needing so much of accuracy and repetitiveness.

But, JLCPCB is not expensive for their PCB (probably the cheapest) but maybe not an optimized option for assembly especially if your parts are not in their inventory. But, if you can only use their parts in your design and not looking for big volume or requiring full turnkey solution like testing, packing, etc, it is a good option. I have only tried them once for fun but for real production I used other service provider in Shenzhen.

thm_w:

--- Quote from: peter-h on October 27, 2021, 07:07:16 am ---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).

--- End quote ---

I didn't "go over your old posts", I remember you posting about having issues with JLC. Which is incredibly relevant to this thread, as the problem is almost the same.

I've also already recommended making a handful of pre-production units, to verify that their production process is correct, parts are good, etc.
This way you are checking: the PCB, the pick and place, solder, the components, etc. Instead of just going overboard checking the PCB only, and assuming everything else will be good.

Mangozac:

--- Quote from: 48X24X48X on October 27, 2021, 08:45:52 am ---It is almost 100% that PCB companies will tweak your gerber to better suite their manufacturing capabilities

--- End quote ---
And for those concerned about such tweaks they do offer the "Confirm Production file" option when ordering.


--- Quote from: peter-h on October 27, 2021, 07:07:16 am ---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.

--- End quote ---
JLC have always come in the cheapest for any quotes I've done. Are you doing giant quantities or something?

What are you doing that's so complex that you need to provide written instructions? When I design a board I specifically refer to the JLC design rules so that I can place the order without having to provide any further instructions. I understand that sometimes something more complex needs to be achieved; that's why you order just a couple of prototypes first and/or use the "confirm production file" option.

The JLC order form provides plenty of guidance. Click on the question mark next to quantity and it specifically states "If your design is a panel with several boards on it, it is the number of your panels ..... When you place an order that requires us to panelize the board, it will be the number of panels. "

james_s:

--- Quote from: Mangozac on October 27, 2021, 10:49:30 pm ---What are you doing that's so complex that you need to provide written instructions? When I design a board I specifically refer to the JLC design rules so that I can place the order without having to provide any further instructions. I understand that sometimes something more complex needs to be achieved; that's why you order just a couple of prototypes first and/or use the "confirm production file" option.

--- End quote ---

From what I can tell, nothing. The issue isn't complexity, the issue is his unorthodox workflow and ignoring of standards and conventions that if followed, would negate the need to explain anything. I have never once had a board come out with an error that I didn't design into it myself. I've goofed up layouts a handful of times and it was always entirely my own fault, JLC and other providers manufactured the board exactly as I designed it.

langwadt:

--- Quote from: james_s on October 27, 2021, 11:05:49 pm ---
--- Quote from: Mangozac on October 27, 2021, 10:49:30 pm ---What are you doing that's so complex that you need to provide written instructions? When I design a board I specifically refer to the JLC design rules so that I can place the order without having to provide any further instructions. I understand that sometimes something more complex needs to be achieved; that's why you order just a couple of prototypes first and/or use the "confirm production file" option.

--- End quote ---

From what I can tell, nothing. The issue isn't complexity, the issue is his unorthodox workflow and ignoring of standards and conventions that if followed, would negate the need to explain anything. I have never once had a board come out with an error that I didn't design into it myself. I've goofed up layouts a handful of times and it was always entirely my own fault, JLC and other providers manufactured the board exactly as I designed it.

--- End quote ---

at the low price per board they must be making huge numbers every day, if they didn't have very high success rate they wouldn't be around for long

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