... nothing like resurrecting a year old thread!
Can you tell me 'what' special instruction you missed?
For the life of me, I can't seem to get an ultra 6800 derailleur properly set up on my 2015 Cervelo S3. I feel like I'm choosing between two compromises;
1. less cable tension -> resulting in no effect of L-Trim and derailleur rub high gear (52x11),
-OR-
2. More cable tension, resulting in less functional range with H-Trim (...but may I shouldn't be cross chaining anyway!).
Actually, to add to this, The L-Trim function doesn't seem to work with anything other than HIGH cable tension!
I feel like I'm missing the magic setup instruction to make it all work. I have been through the set up a few times, but I feel like I'm doomed to repeat my mistakes. So far, I am.
1. Getting the FD set up 1-3mm above the crank
2. Adjusting the l-limit screw to get the outer plate in line with the big ring.
3. tightening the FD down with the tail of the derailleur 0.5mm inwards.
4. Tightening the stability screw (?) down to bring the FD parallel with the big ring
5. Making sure the converter is set to the appropriate position (in my case, 'ON')
6. Unscrewing the L-limit to get proper clearance in Low-Low set up.
7. Shifting to big ring and adjusting tension to allow for max cross-chain position (52-25).
8. Adjust H-Limit to make sure I can't over shift.
...By the end of Step 7, I still don't have enough tension on the cable and my chain rubs in 52-11. I also can't see any derailleur movement from L to L-trim.
If I add more cable tension, I barely see any movement from L to L-trim, but now hear lots of rub on cross chaining.
Any insights?