Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Interest in Bulk Feeding

Jon Medernach

#15298

Interest in Bulk Feeding | 23 June, 1998

What is the level of interest in bulk feeding cpassive devices, caps & resistors, 0402,0603,0805? The component mfgs. tell me in 3 years 40% of the passive caps will be bulk fed. Their is currently about a 10% cost savings with bulk over tape & reel and that number will surely grow as volumes increase, and no scrap! So why the lack of interest?

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Stefan Witte

#15300

Re: Interest in Bulk Feeding | 23 June, 1998

| What is the level of interest in bulk feeding cpassive devices, caps & resistors, 0402,0603,0805? The component mfgs. tell me in 3 years 40% of the passive caps will be bulk fed. Their is currently about a 10% cost savings with bulk over tape & reel and that number will surely grow as volumes increase, and no scrap! So why the lack of interest? A wishful thinking of the component mfgs! The machine suppliers prepared themself with different designed bulk feeders ( I like the Sanyo design best ) and expecting the customers of testing their products. With some of the bulk feeders I experienced an impact on the pick up reliability due to the more complicated mechanic of the bulk feeders. Tape feeders have a 15 years and more proven and improved mechanic. I expect it will take at least five years of customer feedback on bulk feeders until all the "bugs" get resolved.

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Wayne

#15302

Re: Interest in Bulk Feeding | 24 June, 1998

| A wishful thinking of the component mfgs! | The machine suppliers prepared themself with | different designed bulk feeders ( I like the | Sanyo design best ) and expecting the customers | of testing their products. | With some of the bulk feeders I experienced an | impact on the pick up reliability due to the more complicated mechanic of the bulk feeders. | Tape feeders have a 15 years and more proven and | improved mechanic. I expect it will take at least five years of customer feedback on bulk feeders until all the "bugs" get resolved. Have you taken a look at the Panasonic KME bulk feeders, really a neat design and there is not damage to components. Easy to load too, so I am told. Wayne

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coogan

#15299

Re: Interest in Bulk Feeding | 29 June, 1998

Does the current Panasonic / KME bulk feeder design use the indexing concept developed by Taiyo Yuden (Japan), or is it based on the Nitto (pneumatic) concept?

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John Bashe

#15301

Re: Interest in Bulk Feeding | 10 July, 1998

| | What is the level of interest in bulk feeding cpassive devices, caps & resistors, 0402,0603,0805? The component mfgs. tell me in 3 years 40% of the passive caps will be bulk fed. Their is currently about a 10% cost savings with bulk over tape & reel and that number will surely grow as volumes increase, and no scrap! So why the lack of interest? | A wishful thinking of the component mfgs! | The machine suppliers prepared themself with | different designed bulk feeders ( I like the | Sanyo design best ) and expecting the customers | of testing their products. | With some of the bulk feeders I experienced an | impact on the pick up reliability due to the more complicated mechanic of the bulk feeders. | Tape feeders have a 15 years and more proven and | improved mechanic. I expect it will take at least five years of customer feedback on bulk feeders until all the "bugs" get resolved. I see a lot of interest in bulkfeeding, just not a lot of companies that have actually implimented it. The issue is not feeder reliability (a well designed bulkfeeder will run at mispick PPM levels down to 1/10th that of a comparable tape feeder). The real issue is the complex logistics of implimenting bulk feeding across an entire factory. If bulkfeeding is not supported by all vendors placement machines (and with the same casette standard) the logistics of having to stock components in tape AND bulk are cost prohibitive. Not all pick and place manufacturers have been successful yet in developing bulkfeeders. Bulk is without a doubt the way to go for high volume assembly of boards with high chip counts of 0402-0805 parts. Feeder jams are minimized, and intervals between parts replenishment can be greatly increased. (0402 bulk casettes hold > 50k chips each, which is equal to (5) 7" reels). These are the 2 main influences on practical machine efficiencies. Additionally, storage areas for component inventories can be significantly reduced in size. The never-ending drive to reduce the cost of electronic products should logically push the industry in the direction of bulkfeeding for high volume assembly environments.

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