Does anyone out there have a schematic of the DI2 external BB / internal junction box? Or has someone pulled one apart and know how everything connects?
I'm contemplating building a home-made wiring solution to run DI2 with a Look 596 - internally. I posted about this recently but realized the BB area is an issue. Interestingly, this same issue applies to the Look 595. See pic of BB area on said 596.
It's a simple enough matter of running 5 x 30 gauge wires down each of the existing derailleur cable guides. An easy solution would be to use the external DI2 BB junction box BUT I'd have to sever the existing derailleur cable guides just before they enter the BB area. However, I really want to avoid trimming / cutting the derailleur cable guides around the BB area in the event I:
1. Sell the frame at a later date OR
2. Revert back to a regular cable solution.
Any tips about the junction box would be appreciated!
If I get this sorted out, I'll post pics - this install would apply to Look 595 and 596 framesets.
goodboyr wrote:We just finished a full internal Di2 install on a Look 595. We used the EW-7975 internal cabling harness, and mounted the battery just ahead of the BB under the downtube. The challenging part was to get all the internal cabling and JB inside the frame. This frame is filled with some kind of soft foam insulation that needs to be picked out to make room. As well, we did need to slightly enlarge the FD cable guide hole that goes through the big square lug behind the BB area. But we got it done, it looks great and works fine.
POST PICTURES OF IT!!!!!!!!!!!!!
The BB shell is fairly thin aluminum. Brace your hand so that you can hold the bit steady. Start a small hole and then use the side of the bit to "eat' the aluminum. Keep away from the threads of the shell. You don't want to damage those. Once you finish doing the cables, you will have three cables passing through the shell. The FD, RD and Battery. I used rubber grommets from Home Depot to line the edge of the holes to protect the cables from the sharp edges. The internal cable kit EW-7975, comes with a replacement plastic bottom bracket spacer of smaller diameter than the regular Shimano one. That provides room for the cables to go. You can see it in the Shimano Doc. that gives you some detail on the internal cable install.
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and the cranks is the THM Clavicula but i meed the carbone part to protect the cables
you can see the photos (sorry for my bad English)
http://www.concept64.fr/Pieces_Velos_su ... tions.html
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