Re: [CAD_CAM_EDM_DRO] Hybrid Connectors Was Re: availability of composite multiconductor cable?

My apologies guys, the statement in the second sentence should have read
"the greater the coupling". An obvious mistake if you are familiar
with electricity. I do hope that confusion does not result from this
error.

Dave

David A. Frantz wrote:

>Long distance parallel runs is the biggest issue. The closer the
>cables are to each other the less coupling, it does not take a lot of
>space between the cables to elminate a problem. Sometimes you can get
>away with short runs having your signal and power cables bundled
>togther, but it is hard to say how far is to far. Once inside a panel
>box or race way allow for randomness.
>
>The problem is that there are a whole host of differrent shield types in
>the cables to contend with. Then you also have the issue of the type
>of noise that the drive generates. Some old brushless drives where
>very noisy requiring careful routing of power lines and not just for
>elimination of encoder noise issues.
>
>You might want to talk to the motor / drive manufacture to see what they
>reccomend. If you are very careful in your attempt to eliminate ground
>loops in the shields you may have good results just running two shielded
>cables parallel for a few feet. If the manufacture comes back and
>says run everything on one cable I'd be worried.
>
>This brings up another issue which is termination of the shields.
>Generally they should be terminated at one end at one point only.
>Every effort should be made to make sure that the shields, of the
>various cables, do not make electrical contact at any point beyond the
>termination point.
>
>Thanks
>Dave
>
>mrgamber wrote:
>
>
>
>>I'm looking at some hybrid d-shell connectors that have 2 power pins
>>and 5 signal pins.
>>
>>If I use 2 seperate cables for power and signal, but they enter the
>>backshell at 90 deg to each other, wire to their respective pins and
>>then seperate again inside the box, will this still be a problem?
>>
>>As I understand it, running the wire for a distance in parallel is
>>the problem and not the being close in a few places.
>>
>>
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>
>Addresses:
>FAQ: http://www.ktmarketing.com/faq.html
>FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
>Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
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>List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@..., timg@...
>Moderator: pentam@... indigo_red@... [Moderators]
>URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
>OFF Topic POSTS: General Machining
>If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
>http://www.metalworking.com/news_servers.html
>
>http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
>
>NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
>bill
>List Mom
>List Owner
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