TECHNET Archives

June 2007

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
"ALLEN, LOA" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, ALLEN, LOA
Date:
Fri, 8 Jun 2007 08:23:05 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (129 lines)
Ernesto,

This is the same response given to us when we recently experienced the
same problems when placing 0402 passives . . . I suppose it is good to
eliminate the obvious first, but did not help in resolving the issue.
The operator (short term solution) shuffled the deck & ran the problem
parts last at ~35% capability, i.e. babysitting each placement.
Bottom line - something changed & it wasn't the PnP or feeders.

So far this is what's been uncovered in the investigation -
- parts manufactured & placed on the reels in Israel
- electrostatics hampered placement in the conventional carrier
- switched to plastic carrier
- used heat activated cover tape (as opposed to pressure sensitive)
- been told the cover tape adhesive is within the "spec"

So, Ioan there does appear to be a spec & I would be interested in
getting a copy as well if you find it.

Good luck & keep us posted.

Loa

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Rueda, Ernesto
Sent: Thursday, June 07, 2007 12:24 PM
To: [log in to unmask]
Subject: Re: [TN] Peeling strength of cover tape

There are quite a bit of problems in dealing with feeders not just how
components are being taped and reeled. With the amount of glue on the
cover tape, it would not be too much to stick to the carrier tape or the
glue that has been applied is the like of "GORILLA GLUE".

You did not mention the kind of feeder you are using and to what machine
type. Anyway, the first thing to do is check your feeders:

1. if there is enough tension on the top foil(cover tape) 
   - the top foil(cover tape) should pass through the right tape paths.
Make sure the winding rollers and crimping rollers are in good
condition.
2. if the feeder index is correct.
3. if any feeder parts are loose, damaged or broken.
4. if the carrier tape is stuck in the tape guide or any component might
be stuck in it.

Hope this will help.

Ernesto V. Rueda
SMT Process Engineer
Pelco, Inc.
3500 Pelco Way
Clovis, CA 93612

 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Tempea, Ioan
Sent: Thursday, June 07, 2007 10:46 AM
To: [log in to unmask]
Subject: [TN] Peeling strength of cover tape

Hi Technos,

we're having issues here with tape jamming in the feeders and we feel
that the cover tape is too well glued to the carrying tape.

Is there a standard or a commonly recognized rule for the adherence of
the cover tape? Can it be measured somehow?

Thanks,

Ioan

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To
unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to [log in to unmask]: SET
Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the
posts: send e-mail to [log in to unmask]: SET Technet Digest Search the
archives of previous posts at: http://listserv.ipc.org/archives Please
visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for
additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------
Confidentiality Notice:
The information contained in this transmission is legally
privileged and confidential, intended only for the use of the
individual(s) or entities named above. This email and any files
transmitted with it are the property of Pelco. If the reader of
this message is not the intended recipient, or an employee or agent
responsible for delivering this message to the intended recipient,
you are hereby notified that any review, disclosure, copying,
distribution, retention, or any action taken or omitted to be taken
in reliance on it is prohibited and may be unlawful. If you receive
this communication in error, please notify us immediately by
telephone call to +1-559-292-1981 or forward the e-mail to
[log in to unmask] and then permanently delete the e-mail and
destroy all soft and hard copies of the message and any
attachments. Thank you for your cooperation.

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2