Oldwolf
I personally don't have an arbor press, but I have upon occasion used them. They are good for stamping metal, the die is lowered against the metal (a blade in a knifemaker's case) and pressure is applied to the wheel to press the stamp into the metal as firmly as possible. Then a sharp tap on the top to the bar with an appropriate hammer (dead blow is best) transfers more energy to the die sinking it deeper. As usual, practice is needed to get it to perform best.
The press can also be used to lower the electrode used for etching down on the stencil, thus eliminating the shaky hand.
Another use is for pushing bearings onto and off of shafts, or in and out of recesses (this is where the plates come in) They can be used to set snaps, rivets, etc. & reload ammunition (usually a slightly different setup but with the proper adapters for dies it can be made to function.
I have used them to hold parts in place while adhesives cure, cut gaskets and spacers (requires appropriate dies). Most anything that can be crimped by hand can be crimped with a press if proper dies are available.
I realize this doesn't tell you how to use the press, but it hopefully give you the general idea as to what it can be used for.
Go on line and search on arbor presses. Look on the manufactures sites for examples of their products in action.
Jim Arbuckle
ABS JS