Thanks for your suggestions.
I did not find a post about 'adjusting a set screw. I took the foot apart, dusted off some white buildup that was on the part that moved forward/backward which made a connection to 2 copper pieces, and did not see a screw which could be adjustable.
I'll try the foot pedal again...this time with shoes on and maybe that'll help me 'get the right speed'.
I'll look more for pics/blogs about foot pedals.
Thanks - Nancy