Chain hitting front derailleur cage with H limit screw fully loosened I followed the Park Tools guide to set up my gears. The rear derailleur was a success but I can't manage to adjust the front derailleur so that the chain stops grinding on the guard. There's no more give left in the H adjustment so I can't bring it forward. Any ideas?
As you can see by the paint damage, the chain has hit my frame many times in the 6 months I've owned the bike. The chain has never come off though.
One suspicion I have for the chain pushing against the derailleur cage is that the chainring is not fitted correctly, or has shifted. The photos show that it's on an angle. Is this cause for concern?
Thanks in advance.
For the images below, the chainring is set to the top and the casette is set to the bottom:
There's more to front derailleur adjustment than limit screws and cable tension.  Both the angle of the derailleur and the height need to be set properly.
The angle of the derailleur being off can cause chain rub against the cage.  If the rear of the cage is angled too far outward, the chain can rub against the inside of the cage when the chain is on the largest cogs.  If the derailleur is angled so the the rear of the cage is too close, the chain can rub against the outside of the cage in gear combinations where the chain is on the small cogs.
The derailleur looks to be canted slightly inwards towards the rear.
When looking down on it, I'd say it needs to be rotated counterclockwise to move the rear of the cage just a bit farther from the frame.
And that will likely affect the limit screw and cable tension settings.