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SMT electronics assembly manufacturing forum.


SMT reels using paper for caps and have problems with feeder jam

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james

#37313

SMT reels using paper for caps and have problems with feeder jam | 25 October, 2005

Does anyone else encounter problems using feeders to handle caps that are reeled up with paper tape. We are having alot of problems with vendors that are now using the thicker type (like cardboard) to use to reel up caps. Our feeders either run too slow or just stop working. We currently use quad feeders to handle these.

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bobpan

#37315

SMT reels using paper for caps and have problems with feeder jam | 25 October, 2005

5v or 12v feeders.....and are you sure the parts fit through the feeders and are not getting jammed. On some of the old feeders you had to remove the springs and other parts to make the tall caps work....

chow

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RDR

#37329

SMT reels using paper for caps and have problems with feeder jam | 26 October, 2005

We are also experiencing problems with this thick stiff paper tape. Our problem is the strength of the spring that supports the tape at its pick position. After a while it just pushes it down because the tape exit wants to bend the tape too sharply and it can't. I wish I had a machine that cut off the excess tape like Fuji do (or used to). I have found that KEMET has the worst as far as stiffness. The thickness itself presents no problem for us.

Russ

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Rob

#37332

SMT reels using paper for caps and have problems with feeder jam | 26 October, 2005

I wouldn't say we've escaped either - Fuji blade wear is heavily up at the moment.

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james

#37360

SMT reels using paper for caps and have problems with feeder jam | 27 October, 2005

Yes I would have to agree Kemet is the worse. I believe our feeders are just not strong enough to handle the thickness of the tape. It seems to need alot of force to move and to roll the tape through.

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RDR

#37361

SMT reels using paper for caps and have problems with feeder jam | 27 October, 2005

Is anyone aware of the spec for tape if any?

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Rob

#37363

SMT reels using paper for caps and have problems with feeder jam | 27 October, 2005

Hi Russ,

Kemet - http://www.kemet.com/kemet/web/homepage/kechome.nsf/vapubfilesname/F3102CE.pdf/$file/F3102CE.pdf

You want page 29 of 30 of this PDF

Murata -

http://www.murata.com/catalog/c02e11.pdf

Page 132 of the catalog, or 134 of the PDF.

Both show 1.1mm. I've used Murata as a comparison as they ship the largest volume of chip caps in the world.

Cheers,

Rob.

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RDR

#37366

SMT reels using paper for caps and have problems with feeder jam | 27 October, 2005

Thanks Rob, Our tape does meet the Kemet spec but I am actually wondering if there is an EIA spec or something to compare to.

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#37380

SMT reels using paper for caps and have problems with feeder jam | 27 October, 2005

EIA-481-B Max tape thickness 1.1mm (not including bottom and top cover tapes which can be .1mm max each) Of course a 1.1mm thick piece of steel will be stiffer than a 1.1mm thick lasagna noodle (already cooked). Is the thickness the issue or is it the stiffness?

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RDR

#37382

SMT reels using paper for caps and have problems with feeder jam | 27 October, 2005

Thanks for the spec Greg, For us it is the stiffness.

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james

#37385

SMT reels using paper for caps and have problems with feeder jam | 27 October, 2005

I agree the stiffness is definately the problem.

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