IPC/WHMA-A-620 Requirements and Acceptance of Cable and Wire Harness
Assemblies Clause 14.1 Tie Wrap/Lacing Application has six pages w/15
pix dealing with this criteria. Other criteria in Chapter 14 Wire Bundle
Securing includes wire bundle breakouts (individual wires and bundles),
breakout spacing, breakout bend radius, wire crossover in bundles,
coaxial cable routing, unused wire termination and ties over splices and
ferrules. 16 pages in all; 39 full color pix. 

Jack Crawford
Director, Professional Development and Assembly Technology
[log in to unmask]
847-790-5393
fax 847-504-2393

APEX 2003 March 31-April 2 Anaheim CA 
www.goapex.org 
IPC Printed Circuits EXPO March 25-27 Long Beach CA
http://www.ipcprintedcircuitexpo.org/
 

-----Original Message-----
From: Kasprzak, Bill (sys) USX [mailto:[log in to unmask]] 
Sent: Wednesday, February 19, 2003 8:56 AM
To: [log in to unmask]
Subject: [TN] Attachment of ty-wraps


Hello all,

I am looking to find what others are doing with respect to tools used to
install ty-wraps. These tools enable the user to tighten a ty-wrap then
cuts off the excess portion of the wrap. The tension of the tightness is
a function of the operator to adjust the tool so that the wrap cannot
slide back and forth when tightened but not so tight to cause noticeable
indentation or distortion of the wire bundle.

In my opinion this is operator controlled and a pre-set controlled
tightness value cannot be assigned for this process. If some pre-set
value were to be established, then calibrated ty-wrap tools would be
needed. I do no think that these tools can be "calibrated" per se.

Does anyone have experience with the controlled use of these tools for
tightening ty-wraps?

Any and all responses are appreciated. Thanks.

Bill Kasprzak
Moog Inc. Manufacturing Engineering, Electronics

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Please visit IPC web site http://www.ipc.org/html/forum.htm for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
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