I bought a new bike specced with a sora front derailleur and left brifter. I've been unable to make the front derailleur shift properly. I sent a message to the manufacturer (no response yet) but I suspect this might be more technical than their customer support is used to.
Right now, the core problem seems to be that the front derailleur cannot swing far out enough to stop rubbing the outboard side of the chain when on the large chainring. I don't see anything blocking the derailleur from traveling further, but when attempting to push it further by either tugging on the cable or manually rotating the cage, it does not budge.
Top down picture of the cranks:
Derailleur cage does not go past this point:
Neither limit screw is making contact.
I have checked the alignment by setting the top edge of the outer cage parallel to the chainring.
I suspect that the bike is specced with a chainline too far for the derailleur. I measured (with a little difficulty):
Inner chainring (center of tooth) is ~44mm from center of seatpost.
Outer chainring (center of tooth) is 51-52mm from center of seatpost.
How can I make this work? I think I could potentially gain 3mm by moving that bottom bracket spacer to the other side, but I don't think it would be enough.