Author Topic: Why you need bulk/loose SMDs?  (Read 2544 times)

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Offline olkipukkiTopic starter

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Why you need bulk/loose SMDs?
« on: September 06, 2018, 11:14:55 pm »
I noticed that you can buy generic SMD capacitors down to 0402... well, puzzle for me, what people are doing with these?  :-//
 

Offline ANTALIFE

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Re: Why you need bulk/loose SMDs?
« Reply #1 on: September 07, 2018, 05:27:03 am »
You talking like off eBay/AliExpress? If so some people just want to have something cheap to get them started

Offline olkipukkiTopic starter

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Re: Why you need bulk/loose SMDs?
« Reply #2 on: September 07, 2018, 05:54:20 am »
You talking like off eBay/AliExpress? If so some people just want to have something cheap to get them started
Nope, Mouser or DigiKey, for example.
 

Offline LukeW

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Re: Why you need bulk/loose SMDs?
« Reply #3 on: September 07, 2018, 06:55:02 am »
Manual hand assembly of experiments and prototypes, repairs and modifications, and hobbyist uses?
 

Offline SMTech

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Re: Why you need bulk/loose SMDs?
« Reply #4 on: September 07, 2018, 07:27:31 am »
Very high volume production lines can use bulk packs of surface mount capacitors in special feeders, this makes it easier to keep up with demand, and can result in massive reduction in used tape. Its also super-cool, check out this video from ASM

Or rather more specialised: this bowl feeder for LEDs from Mirae
. The big commercial machines can have all sorts of weird and wonderful custom feeders made for them by the manufacturer or 3rd parties like Hover Davies. Another common one is through hold LED feeders that can bandoliers of through hole LEDs, cut, form if needed, and place/insert. You can also place solder balls, solder preforms, labels or pretty much anything if you have the machine, requirement and tooling.
 
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Offline ANTALIFE

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Re: Why you need bulk/loose SMDs?
« Reply #5 on: September 07, 2018, 08:28:01 am »
You talking like off eBay/AliExpress? If so some people just want to have something cheap to get them started
Nope, Mouser or DigiKey, for example.

Ah had no idea you could buy those sort of things from reputable suppliers

Very high volume production lines can use bulk packs of surface mount capacitors in special feeders, this makes it easier to keep up with demand, and can result in massive reduction in used tape. Its also super-cool, check out this video from ASM

Or rather more specialised: this bowl feeder for LEDs from Mirae
. The big commercial machines can have all sorts of weird and wonderful custom feeders made for them by the manufacturer or 3rd parties like Hover Davies. Another common one is through hold LED feeders that can bandoliers of through hole LEDs, cut, form if needed, and place/insert. You can also place solder balls, solder preforms, labels or pretty much anything if you have the machine, requirement and tooling.

Oh wow, had no idea those sort of PP machines/feeders existed. Makes sense, we had one customer that wanted to get their cut up wafer into cut-tape reel, they were a bit shocked with how much it costs

Offline SMTech

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Re: Why you need bulk/loose SMDs?
« Reply #6 on: September 07, 2018, 08:46:35 am »
Pretty sure you can get a customised machine/feeder that takes a wafer and does the rest :D
 

Offline ANTALIFE

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Re: Why you need bulk/loose SMDs?
« Reply #7 on: September 07, 2018, 09:07:18 am »
Pretty sure you can get a customised machine/feeder that takes a wafer and does the rest :D

Ah righto, we were going to use our one (MY12) but it turned out the piece of silicon had to be rotated in all 3 axies before it was placed on the PCB

Offline SMTech

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Re: Why you need bulk/loose SMDs?
« Reply #8 on: September 07, 2018, 09:32:38 am »
IIRC what I have seen online was a case study on the Essemtec website for a custom solution, but it was some time ago and based on an FLX, can't see it on the wayback machine tho'.
 

Offline mrpackethead

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Re: Why you need bulk/loose SMDs?
« Reply #9 on: September 07, 2018, 10:05:57 am »
The cost of putting parts on tape can be more than the parts themselves for small passives.
On a quest to find increasingly complicated ways to blink things
 

Offline olkipukkiTopic starter

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Re: Why you need bulk/loose SMDs?
« Reply #10 on: September 07, 2018, 05:15:53 pm »
Very high volume production lines can use bulk packs of surface mount capacitors in special feeders, this makes it easier to keep up with demand, and can result in massive reduction in used tape. Its also super-cool, check out this video from ASM

Wow, looks awesome!
That's cool concept and not yet anyone copied it?!

P.S.
If someone struggle to understand German   >:D
here is English version of above youtube video

 
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Offline olkipukkiTopic starter

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Re: Why you need bulk/loose SMDs?
« Reply #11 on: September 07, 2018, 05:29:57 pm »
You talking like off eBay/AliExpress? If so some people just want to have something cheap to get them started
Nope, Mouser or DigiKey, for example.

Ah had no idea you could buy those sort of things from reputable suppliers

Me either. I accidentally noticed in KEMET datasheet...
 

Offline mrpackethead

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Re: Why you need bulk/loose SMDs?
« Reply #12 on: September 07, 2018, 10:10:33 pm »
Wow, looks awesome!
That's cool concept and not yet anyone copied it?!

It is a non trivial problem to solve and if you are goign to need to place 10's Millions of the same part, it may be worth pursuing. 
On a quest to find increasingly complicated ways to blink things
 


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