Son Edelux II connection with SV-8 Dynamo hub

[David]

Oh man, I seemed to have botched my hasty attempt at connecting my new Edelux light to my new SV-8 hub... both obtained from RBW a few weeks back.  I'm hoping someone here on the group can advise.  What I did right off the bat was clip off the two plugs that were pre-installed on the ends of the Edelux wire.  I did that because the Edelux end plugs did not appear compatible with the the connector cap and cover that ultimately fits over the connection terminal of the SV-8.  So now I have a single end of wire all frayed that really doesn't want to stay in the SV-8 connection terminal all that well.  It the attached image, you see the connector cap and cover fitted onto the terminal, which snaps on and off.

Anyone here have the same set-up, or any advice otherwise?  Thanks for your time.

[Eric Norris]

The wire that goes into the connector needs to be long enough to bend around the inner piece, so it makes a "U" shape. Then you slide the outer part on. You shouldn't have any trouble with the wires once you've done this.

On one of my bikes, I tinned the wire ends with solder to make them a bit more rigid, but that's not really necessary. 

Eric N

www.CampyOnly.com

CampyOnlyGuy.blogspot.com

Twitter: @CampyOnlyGuy

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[Anton Tutter]

Ah, this is the issue with coaxial wire and those connectors designed for twin flat wire. It's possible, but you need to strip more outer insulation off of the coaxial wire than you do inner insulation. I.e., the braided ground wire insulation gets stripped back farther than the insulation of the hot wire (the wire in the center of the cable). Then you have to twist the braided ground wire into a smooth linear wire, and then place shrink tubing over it, except at the very end that gets inserted into the connector.  This way the braided wire "resembles" the inner wire (the hot wire). After that's done, place another, larger diameter piece of shrink tubing over the entire coaxial bundle.  It's hard to describe in words...

I can't see from your pic how much of the hot wire you have exposed...

Anton

[Eric Norris]

Here are the illustrated instructions. 

Eric N

www.CampyOnly.com

CampyOnlyGuy.blogspot.com

Twitter: @CampyOnlyGuy

On Jun 27, 2015, at 7:50 PM, David <davidbo...@gmail.com> wrote:

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[Eric Norris]

P.S. I checked with Shutter Precision tech support when I was tracking down a wiring issue, and they confirmed that the hub generates AC power. That means there is not "hot" or "ground" terminal,  and it doesn't matter how you connect the wires.

Eric N

www.CampyOnly.com

CampyOnlyGuy.blogspot.com

Twitter: @CampyOnlyGuy

On Jun 27, 2015, at 7:50 PM, David <davidbo...@gmail.com> wrote:

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[Lee Chae]

Hi David,

This is a pretty easy fix. Just tin the wires using solder and a soldering iron a la:

http://www.instructables.com/id/Strip-and-Tin-Wires-Like-a-Pro/?ALLSTEPS

Everything will be neat and tidy and easy to work with. You can get your solder and iron from any Radio Shack. If you get the right kind of solder and flux, you can tin your brake and derailleur cables, too.

Lee

SF, CA

 

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[Anton Tutter]

This is technically correct: all hubs generate AC power and the terminals are theoretically non-polarized.  However, some hubs, like the Shimano, ground one of those terminals to the axle, and by extension, the frame, and therefore designate that terminal "ground".  Likewise, some headlights, like the Edelux, ground one of their terminals to the headlight shell (and therefore the frame of the bike, when mounted). By convention, the braided outer conductor of a coaxial wire is designated the ground, and Schmidt follows this convention. So it follows that the Edelux's braided wire is grounded to the bike's frame, and that the designation of hot and ground wires be used, even though the SP's hubs themselves are insulated from the axle, and by extension, the frame of the bike.

If you were blind to the designation of hot and ground wires, and were running an Edelux off of a Shimano hub, you would have a 50% chance of wiring it backwards and shorting out the hub.  Conventions, in general, are good to follow, even if they may not apply to a specific situation.

Anton

[David]

Thank you all for the guidance.  Seems an easy fix.  I really appreciate your time.

David