Author Topic: EEVblog #239 - PCB Design For Manufacture Part 2  (Read 3242 times)

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Offline Blue

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EEVblog #239 - PCB Design For Manufacture Part 2
« on: January 25, 2012, 04:31:52 am »
Great video blog.  :)

Thanks a lot, I've learned quite a bit.

Apparantly there is a lot of waste in unused parts. Is there an alternative for this? Can't the manufacturer put an extra leader tape on the reals or are they just lazy?
 

Online mikeselectricstuff

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Re: EEVblog #239 - PCB Design For Manufacture Part 2
« Reply #1 on: January 25, 2012, 05:27:00 am »
Full reels have leaders and trailers, which is fine as long as you are using enough to buy full reels.
Some distributors will cut tape and add leaders and trailers, but the splices can sometimes be a problem going through feeders.
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Offline IanB

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Re: EEVblog #239 - PCB Design For Manufacture Part 2
« Reply #2 on: January 25, 2012, 08:18:43 am »
I'm thinking that all the lost and unused parts might find their way into lucky dip "grab bags" full of random stuff on surplus and auction sites. Does this ever happen or do the wasted parts just get thrown away?
I'm not an EE--what am I doing here?
 

Offline Blue

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Re: EEVblog #239 - PCB Design For Manufacture Part 2
« Reply #3 on: January 25, 2012, 10:07:21 am »
I don't know what happens with the waste.

What I do know is that surplus reels gets grabbed by traders. Sometimes I meet one of them at ham fests (trade show targetted at hams). Unfortunately I cannot order reels since this guy has too much. He rather shovels some of his wares into big boxes for potential customers to browse. Then he charges according to what it is e.g. Resistors €5, electrolytic caps, mini switches €25.
 

Online mikeselectricstuff

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Re: EEVblog #239 - PCB Design For Manufacture Part 2
« Reply #4 on: January 25, 2012, 10:40:58 am »
I'm thinking that all the lost and unused parts might find their way into lucky dip "grab bags" full of random stuff on surplus and auction sites. Does this ever happen or do the wasted parts just get thrown away?
Chip parts are so cheap they're just not worth recovering, much less sorting.
For expensive parts, I'd expect they program the P&P machine to put parts rejected by vision in a specific bin, or if in a tray, back into the tray.
Youtube channel:Taking wierd stuff apart. Very apart.
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Offline Neilm

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Re: EEVblog #239 - PCB Design For Manufacture Part 2
« Reply #5 on: January 26, 2012, 06:15:52 am »
I'm thinking that all the lost and unused parts might find their way into lucky dip "grab bags" full of random stuff on surplus and auction sites. Does this ever happen or do the wasted parts just get thrown away?
Chip parts are so cheap they're just not worth recovering, much less sorting.
For expensive parts, I'd expect they program the P&P machine to put parts rejected by vision in a specific bin, or if in a tray, back into the tray.

One problem with this is that once out of the packaging, the chips are very susceptible to ESD damage. The worst part about that is that there is no quick way of knowing this - sometimes ESD damage doesn't show up until after several months of operation.

Neil
Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe. - Albert Einstein
 

Offline oodavid

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Re: EEVblog #239 - PCB Design For Manufacture Part 2
« Reply #6 on: October 01, 2015, 08:07:48 pm »
Just watched this and PT1, along with a swathe of other EEVBlog videos, I'm new to electronics but am keen to get my feet wet - great work.

The only issue is that now my "watch later" is about 100 hours long... time to skill up!

Apologies for necromancing.
 


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