Joined: Jan 2010
Posts: 9,830
Likes: 1,807
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Your bike has indexed front shifting, where the leverage of the front derailer has to be precisely matched to the particular indexed shifter.
Is that Veloce front derailer even a triple type derailer (would have a much taller inner cage plate).
I wouldn't expect the Veloce front derailer to be compatible with the Shimano indexed triple shifter. Have you gone through a proper adjustment regimen yet?