...As for your front der problems. Shimano cranks center to center spacing on the chainrings is different than on your Campy crank. Seeing as Shimano is indexed spacing matters. Your Sora brifters work perfect on a Shimano crank. On a Campy they're off just a little. It isn't a big difference but you're experiencing what can go wrong...
Whoa. IF spacing is indeed the problem, what are we here at C&V but not the kings of elementary FM (frikkin' magic) such as custom spacing a few cogs or rings? The merest addition of a washer or two when mounting the rings to the crank could solve this problem. I know because once I bought a Sakae SX triple off of ebay from a member and it had the nicest thinnest little washers carefully spacing the chain rings. I saved the washers. The crank and rings went on my wife's '85 Panasonic Sport 1000.
And understand, the dimension of stress relief and therapy inherent in the OP. When absorbed in this problem out in the shop, a near zen like state of mental and spiritual clarity and pervasive well-being ensues. If a challenge such as this did not naturally arise, it would have to be created.
Dr. MRMW's prescription:
(1) Successful treatment requires that shifter effectuated derailer movement match chain ring spacing
exactly.
Originally Posted by
pastorbobnlnh
...The Shimano Sora (marked "Triple") will not move the FD far enough. I can work the FD by hand and achieve the shift, but no way with the shifter. It appears to not have enough pull...
(2) There is only ONE way to do this. Unless you need so much therapy that your computer privileges would be suspended for twelve months while you anally measure cable pull between non-matching components. I wasn't born knowing this. Early on, here at C&V, flush with false success, Sheldon Brown remonstrated me about this very issue, from which I learned the hard way that IF PERFECTION IS THE IMPERATIVE THEN...
(3) Compromise is in order. You must match the derailer to the shifter--in this case the front derailer to the brifter. Which will allow you to join together the Campy crankset and Shimano 7 speed brifter. For instance--install an inexpensive Sora triple front derailer (in the words of the best mechanic I know 'front derailers are over rated...you could use a tree branch, for goodness sakes').
(4) Do a little googling/asking about triple chain ring spacing Campy vs Shimano
(5) Custom space the crank and you are guaranteed good to go.
One thing is sure. Indexing perfection is the only acceptable therapeutic outcome for such a patient. And from my experience as a misogynistic perfectionist indexer (Suntour Accushift shifters/derailers running Shimano SIS Hyperglide custom spaced cassettes) the above prescription is the only treatment sure to effect a cure.
Here's a start at
http://www.sheldonbrown.com/gloss_ch.html
...teaches that Shimano chainring spacing is 5mm, so the rings are 40, 45, 50mm from the seat tube centerline
Q. Can you accurately and reliably measure the Campy Mirage chain ring spacing? What is it? This might be the rosetta stone...
Once the chain ring spacing issue is resolved, to insure perfection ramped and pinned chain rings may be the way to go--just like we rely on Hyperglide engineered rear cogs to do the same.
PS--perhaps an alternate cable routing at the FD cable attachment point might effect an imperfect, yet working, solution? Me, I'd measure the Campy chain ring spacing first.