In my opinion the root cause is having to buy parts in tubes rather than T&R but as a CM volume doesn't always allow full reel purchases.
 
We use a Panasonic CM88, CM301 and an Amistar 5720, 7100 lines. We are a low/mid volume high mix shop with volume per assembly  of  50 to 600 boards at a time so with the volume jobs we can make a case for T&R but low volume Purchasing wants to buy strips and tubes.  My viewpoint is we shouldn't be placing fine pitch (20 mil) IC's from tubes due to handling defects, cycle time loss, and changes need to be made to programs when models change from T&R to tubes and vice versa. Some assemblies have as many as 12 tubes out of 40 identities. Is this normal? Does everybody do this? Why? Why not. What's a good cost for outside taping?
I can see sockets, large IC's in tubes but not small SOICs and fine pitch. How wrong am I.
 
Dave Chapman

Manufacturing Engineer
Circuit Service Inc.

-----Original Message-----
From: Morse, Carrie [mailto:[log in to unmask]]
Sent: Thursday, December 19, 2002 3:44 PM
To: [log in to unmask]
Subject: Re: [TN] splicing reels

Ah Yes... The Splicing Topic.
I'm sure this is one on the top of everyone's "favorite topics" list.
 
Your question is a bit confusing.  If you want to transfer IC's from tube, you need to tape and reel them.
You can either pay someone to do this, or, you can invest in equipment that does this for you and bring
that capability in house.  If you have someone else do it, you lose lead time as well as control of your parts.
If you bring that capability in house, it's an investment in equipment, training, and resources (i.e.: humans).
 
A splicing tool is used simply to add a leader or to join two sections of material already in tape and reel.
Splicing can often make the situation worse, than better.  For example, if not spliced properly, the reel
may pull causing parts to go all over the place, or, the splice may get stuck in the feeder (depending on
what type of splice and what type of pick and place feeder you are using.)
 
You can also try to purchase the parts in tape and reel in the first place, or, purchase placement equipment
that can handle tubes.
 
Not knowing the size of your company, the equipment you are using, the products you are running, your volumes,
etc, it is difficult to truly understand the root cause of the problem to eliminate it.
 
I would recommend against splicing as it is a Band-Aid in the truest meaning of the word!
 
-Carrie
 
 
 
-----Original Message-----
From: Dave Chapman [mailto:[log in to unmask]]
Sent: Thursday, December 19, 2002 4:29 PM
To: [log in to unmask]
Subject: [TN] splicing reels

Is there a splicing tool or machine for adding leaders to reels of IC's? We have many fine pitch IC's that come in tubes and we would like to run them in tape and reel but it costs $45.00 per item to have them taped.

Dave Chapman,

Manufacturing Engineer
Circuit Service Inc.

 

-----Original Message-----
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