My front derailleur is a Shimano FD-R3000. I have been trying to adjust it following the ParkTool video at
Basically it seems to be working OK now: the chain is not falling off the front chain wheels, and is shifting quickly to and from both the big and small chain wheel.
My question is really about trimming. On the large chain wheel at the front and the smallest two or three cogs at the back, the chain rubs against the front derailleur. (I have nine cogs at the back.) I understand that I can press lightly on the left hand shifter to trim - this removes the noise.
Then I move to the small chain wheel at the front. There is no noise when in combination with any of the rear cogs, except perhaps when I'm on the largest cog at the back. What is unexpected is that when I click lightly on the shifter now, the front derailleur cage moves - further inboard.
Is there supposed to be trimming on the small cogwheel at all with this front derailleur? And if so, is the low trim position really supposed to be inboard relative to the low position?
I am rather new to road cycling, so hopefully my question is not completely stupid!