Author Topic: Ye Olde Cable Lacing Knot  (Read 1609 times)

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Offline graybeardTopic starter

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Ye Olde Cable Lacing Knot
« on: April 23, 2020, 05:48:46 am »


In this 3 minute video I demonstrate a quick, easy, and very effective cable lacing knot.  It is much quicker than many of the examples you will see and works great.

It was shown to me by Scott Wood who was the Senior Engineer in the Display Electronics Department which was part of Radar Systems at the Hughes Aircraft Company when I worked there in the late 1970s.

I have passed it on to many young engineers and technicians over the years and I thought you would like to know it as well.
« Last Edit: April 25, 2020, 04:17:15 am by graybeard »
 

Offline Cubdriver

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Re: Ye Olde Cable Lacing Knot
« Reply #1 on: April 23, 2020, 06:50:21 am »
Great tip - thanks for making and posting the video. I need to get some lacing tape and try this out.  I think another big advantage to lacing is that (especially for slender harnesses) it is much less bulky than tiewraps with their gripping heads.  The heads of even the smallest zip ties will often be nearly as big as the cross section of the harness if it's only a few small gauge wires.

-Pat
If it jams, force it.  If it breaks, you needed a new one anyway...
 

Online MarkF

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Re: Ye Olde Cable Lacing Knot
« Reply #2 on: April 23, 2020, 12:48:26 pm »
This is the knot I was taught for Navy sonar simulator cable runs
(time 1:00 to 2:00 then cut.  No running knot):


 

Offline Paul Moir

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Re: Ye Olde Cable Lacing Knot
« Reply #3 on: April 23, 2020, 03:42:44 pm »
Another advantage is for cable management at elevated temperatures.  A roll of nomex lacing tape is pretty inexpensive compared to PEEK wire ties.

Is the only reason to do a running knot is that it's faster?
 

Offline Wimberleytech

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Re: Ye Olde Cable Lacing Knot
« Reply #4 on: April 23, 2020, 06:53:56 pm »
Lol...great.  In the last stage, you form a bite.  If you do not pull the working end all the way through but stop part way, then tighten from the standing end, you have a "Highwayman's Hitch."  A Highwayman's Hitch is a quick-release hitch so that when the sheriff is chasing you out of the saloon, you can release your horse and high-tail it out of there, lickety split!

Of course...your application has no use for a quick release!!

I learned just the other day that the Highwayman's Hitch is also called a Spanish Running Noose as well.

I like knots...so there!
 

Offline Wimberleytech

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Re: Ye Olde Cable Lacing Knot
« Reply #5 on: April 23, 2020, 06:59:51 pm »
This is the knot I was taught for Navy sonar simulator cable runs
(time 1:00 to 2:00 then cut.  No running knot):



Constrictor knot is far better than the Clove hitch. It is as easy to tie and does not require those extra overhand knots to secure it. 

Nice cable management technique.
 

Offline Neomys Sapiens

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Re: Ye Olde Cable Lacing Knot
« Reply #6 on: April 23, 2020, 08:26:27 pm »
Anyone not wanting to watch those videos can refer to NASA-STD-8739.4, chapter 9.
(or IPC-WHMA-A-620C)
« Last Edit: April 23, 2020, 08:51:27 pm by Neomys Sapiens »
 
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Offline graybeardTopic starter

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Re: Ye Olde Cable Lacing Knot
« Reply #7 on: April 28, 2020, 07:55:44 pm »
Here is a photo of the completed power supply harness I was working on in the video.  Click on the image for a full resolution version.



Chris
« Last Edit: May 02, 2020, 10:22:02 pm by graybeard »
 
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