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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Tape Reel Sizes -Info needed for research

govi

#24934

Tape Reel Sizes -Info needed for research | 23 June, 2003

Hi, I am a grad student workin on SMT placement optimization and i am exploring the possibility of utilizing unused slots and assigning multiple feeder slots for a component type on a chip shooting machine. so far my optimization model has shown very good results in terms of reducing the downtime due to replenishments (upto 45%) through effective exhaust synchronization. But to make it more robust against variation in the reel sizes I need some information regarding whether the number of components in the reels are very accurate or does it have any variation in it. In otherwords, if the manufacturer claims to have 10000 components in a reel, does the reel contains exactly 10000 components or does it have any variation. any help on this isssue will expedite my research and effective tuning of the optimization model. thanks -govi

This message was posted Add this forum to your site! Click to learn more. the Electronics Forum @

reply »

Dave G

#24936

Tape Reel Sizes -Info needed for research | 23 June, 2003

There are some variations on how many parts are on a reel.

A couple of distributors we use state it as a +/- 1% on a reel of 10,000. This only applies to chip parts (R's & C's) Most I.C.'s on Tape and reel are counted very accurately due to the price of the part. Since R's & C's are very inexpensive the variation is allowed.

DG

reply »

Training Services

Plasma Prior to Conformal Coating