I don't know what your taps equal in voltage but would
suggest the the wire speed numbers you posted will be way
out of the starting ballpark. I'd be thinking something
more into the 200ipm range to start with.

Edit
You want to make up some practice joints. Don't just do em flat
on a table, do them overhead, sideways, stand on one foot using
your left hand with one eye closed etc. Do em while your upside
down with sharp objects poking you in the ribs and back with
sparks falling down your neck and you can't really see the weld area.
These are real cage welding practice problems.
Dave P.