Originally Posted by AndrewP
Limit screws on front drailler need to be screwed in to stop the chain falling off. Cable tension needs to be adjusted to centre the cage over the middle chainring (if you have a triple). To move the cage outwards you need more cable tension, which is done byturning the turnbarrel by the shifter anti clockwise. Do the opposite to move the cage inwards.
I think I was missing that bolded part from my efforts to wrestle my FD into a reasonable amount of submission. Once I found it, everything else started to make sense. Thanks for spelling it out.