What marker you got bud? if you've got a lower end marker (I guess you have), then make the hopper slower.
Are you sure you have to set it?
Aren't there factory settings on there?
Use it as it is, & see if there are any problems with it; then change it.
If you start chopping paint- it might be too fast.
But then conversely it must be fastest enough so your marker doesn't keep missing shots. This may also cause it to chop.
Try it, & tell us how it goes- we will help you change it if you see any problems.