Pardon me fellas, as I am brand new here, I know it's not my place to be critical ~~~
But safety is no accident ! Putting a round knife on a powered wheel is an invitation for disaster. At least have 911 on the speed dial and your finger on the button before you try and dress your knife that way. I have been pretty successful in getting a keen edge using light pressure and allowing my fingers to help maintain the correct angle against the stone. Years ago I had a barber's strop, but it was stolen along with all my other leatherworking tools. It's easy to make up your own. Just glue a strip of hide, flesh side up, to a conveniently sized piece of wood. Shape a handle at one end if you wish. Now rub white jewelr's compound into the flesh. You can also add a strip to the other side of the board and use jeweler's rouge on that side for an even finer edge