Our place is slightly more… hectic? We follow just in time manufacturing and single piece flow techniques that Toyota uses. It means one operator follows a relatively small lot of PCBs from start to finish. Each operator working on their own lot is a good way of tracing quality (operators mark each board as each process is finished, and any issues can be addressed, usually with retraining), as well as reacting fast to new orders without much retooling time. An order of boards doesn't have to wait till a day when 500 boards are made on X day of the week, we can shoot it out in a day as long as the order is of only a few boards. It also means we can complete a vast array of different assemblies with only 30 or so operators, and because there aren't so many boards simply sitting on a shelf, inventory is kept low so costs are kept down. Also it means that boards go from bare PCB to assembled in a finished product in maybe four days for complex ones? I think the largest lots I see are surface mount only and are in quantities of 100 or so. As far as testing, if a board has anything more then connectors on it, it gets both a bed of nails and a functional test usually with a computer and software though an interface box.
Excuse my lack of knowledge but how can they actuall wave solder them after the surface mount components have been reflow soldered? Won't the hot solder bath melt the reflow solder even if it's on the other side of the board? what about if there are surface mount components on the other side of the board?
When I imagine that when I order 100s of PCBs there, that all these people work on my PCBs everyone of them would have 'em in their hands, that's damn impressive!
@Films4You Do you realize if she wasn't working this job and making money to support her family she'd be selling her 10 year old ass to do it? Yeh, it's a long day but better than 20 hours on her back. Lots of girls in other 3rd world countries don't have this opportunity. Get off your high horse and get real.
@Films4You that what happens if you're a student in China, if you make a single mistake, you will go to a sweat shop (eg. Nike, PCB assembly,& plastic poduct facotries)
Does the solder-wave machine use heat? For example, if the PCB has surface parts on the bottom side as well, wouldn't the wave affect those components' solder?
Also, in the first tour, since the pick and place machine does not include any solder, do the parts ever shift or move slightly as it's moved to the reflow oven? How is the temperature profile determined?
and @pytey
"If you haven't got something nice to say, don't say it at all"
this is extremely bad advice to give and bad for you to say
first it discourage negative constructive comments
this is called shooting the messenger
and second by saying that you are preventing potentially valuable information from reaching you, it's a double whammy of bad management and it is an extremely common mistake that even I do sometimes
it's never pleasant to hear that but
@lundyoutu
that is constructive criticism if I ever heard it
I suspect that you are not a native english speaker and that his accent makes it hard to understand (I assume that on your slightly contradictory wording of "extremely annoying" and then appologizing, because you probably meant "difficult to understand" which is less emm, inflamatory)
btw I am not a native english speaker so I understand what you say although it doesn't affect me anymore and I now think this is part of why this blog
hahah your killing me.. yeah it is annoying but I dont care.. The dude is great and his blogs have really made me excited about my degree.. Although if Screech from "Saved by the bell" grew up this is him LOL… Any I love the dude he is rockn doing a great job
Dave; the pioneer of long-form youtube content.
Our place is slightly more… hectic? We follow just in time manufacturing and single piece flow techniques that Toyota uses. It means one operator follows a relatively small lot of PCBs from start to finish. Each operator working on their own lot is a good way of tracing quality (operators mark each board as each process is finished, and any issues can be addressed, usually with retraining), as well as reacting fast to new orders without much retooling time. An order of boards doesn't have to wait till a day when 500 boards are made on X day of the week, we can shoot it out in a day as long as the order is of only a few boards. It also means we can complete a vast array of different assemblies with only 30 or so operators, and because there aren't so many boards simply sitting on a shelf, inventory is kept low so costs are kept down. Also it means that boards go from bare PCB to assembled in a finished product in maybe four days for complex ones? I think the largest lots I see are surface mount only and are in quantities of 100 or so. As far as testing, if a board has anything more then connectors on it, it gets both a bed of nails and a functional test usually with a computer and software though an interface box.
Excuse my ignorance of human biology but why did you stop indicating the episode number with your fingers?
thats pretty cool how they let you film in there, great video! ))
Sir you are a god sent gift to me! thank u so much
Excuse my lack of knowledge but how can they actuall wave solder them after the surface mount components have been reflow soldered? Won't the hot solder bath melt the reflow solder even if it's on the other side of the board? what about if there are surface mount components on the other side of the board?
The comment was so dumb, it disintegrated. XD
Dave reminds me of techs i've worked with at AT&T…he has a strong work spirit.
I good incentive to study them.
When I imagine that when I order 100s of PCBs there, that all these people work on my PCBs everyone of them would have 'em in their hands, that's damn impressive!
arguably better than 20 hours.
@Films4You Do you realize if she wasn't working this job and making money to support her family she'd be selling her 10 year old ass to do it? Yeh, it's a long day but better than 20 hours on her back. Lots of girls in other 3rd world countries don't have this opportunity. Get off your high horse and get real.
it justs tiks my off
@Films4You that what happens if you're a student in China, if you make a single mistake, you will go to a sweat shop (eg. Nike, PCB assembly,& plastic poduct facotries)
Does the solder-wave machine use heat? For example, if the PCB has surface parts on the bottom side as well, wouldn't the wave affect those components' solder?
Also, in the first tour, since the pick and place machine does not include any solder, do the parts ever shift or move slightly as it's moved to the reflow oven? How is the temperature profile determined?
buzzer sounds like in McDonald restaurant
awesome videos. i am enjoying them so much
I said it once, I'll say it again,,,,, freaking cool tour!!! Thanks Dave.
@lundyoutu (continued) is so great
and @pytey
"If you haven't got something nice to say, don't say it at all"
this is extremely bad advice to give and bad for you to say
first it discourage negative constructive comments
this is called shooting the messenger
and second by saying that you are preventing potentially valuable information from reaching you, it's a double whammy of bad management and it is an extremely common mistake that even I do sometimes
it's never pleasant to hear that but
@lundyoutu
that is constructive criticism if I ever heard it
I suspect that you are not a native english speaker and that his accent makes it hard to understand (I assume that on your slightly contradictory wording of "extremely annoying" and then appologizing, because you probably meant "difficult to understand" which is less emm, inflamatory)
btw I am not a native english speaker so I understand what you say although it doesn't affect me anymore and I now think this is part of why this blog
Hey Dave, one question. At 7:44 where there's an "automatic bed nail", what's it's correct name?
I think I misunderstood the name.
And also, what's its job?
I'm surprised they let you film openly in there, any factory I've toured it was only approved pictures.
Enjoying all your videos!
hahah your killing me.. yeah it is annoying but I dont care.. The dude is great and his blogs have really made me excited about my degree.. Although if Screech from "Saved by the bell" grew up this is him LOL… Any I love the dude he is rockn doing a great job
very cool!! thanks for sharing. those pick and place machines are fast. i bet there are others out there that are even faster. mind-boggling.