Thread: Metal shielded cabling
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05-02-2010 #1
The DRO on my mill is connected to the sensors by some spiral bound metal cable cover. Could anyone tell me where I can buy this covering as I want to use it to shield the connects from my steppers to their control box. Also I am thinking of buying/making a new control box out of Aluminium (using home made wooden box at present). Can anyone suggest a source, I do not want to use a full sized PC case but a box say 400 x 400 x150 mm would do fine.
Thanks Alan
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05-02-2010 #2
Full steel wrap flexible conduit is *******g expensive (~£100-200 for 25m) and primarily for mechanical protection. If you want to screen the cables electrically then use a good foil screened cable (also expensive).
http://uk.farnell.com/pro-elec/61804...25m/dp/1642126
a cheaper option is metal/plastic (basically a plastic coated spring), again this is primarilly for mechanical protection.
http://uk.farnell.com/pro-elec/64400...10m/dp/1642134
If you can use thin cables then this 16mm stuff is not too badly priced (£23 for 10m)
http://uk.farnell.com/kopex/keu0310/...reel/dp/480563
Last edited by BillTodd; 05-02-2010 at 09:44 PM.
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05-02-2010 #3
I thought the consensus was that the cables to the steppers do not need shielding as they are twisted pair!
Peter
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06-02-2010 #4
Twisted pairs are far from perfect and don't stop RF interference getting into your device (i.e. from a plasma cutter)
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07-02-2010 #5
In the kit car world, shower attachment pipes have been used for cabling (although it's primarily for appearance rather than shielding - but it would have the same effect).
I've seen £3 for 2m lengths on eBay:
http://cgi.ebay.co.uk/Flexible-showe...94ab44ffa69507
Although it does say £4.99 later on - which means for 10m, it would be £25. So similar to the Farnell price...
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