Greenmonsters
Wannabe Duck Boat Owner
The pitching machines in the cages I frequent have dials on them to change the pitch speed.
For many people, simply changing the dial on the machine would be the wiser option. They would avoid the ridiculous induced effective pitch speeds (+200mph) and the associated breakdown in mechanics.
A 'drill' I'll sometimes perform is to ladder the pitch speed 'up' in a series of increments, as well as 'down' in a series of increments. I find the dial on the pitching machine comes in pretty handy for such a drill.
Specifics please
I believe your intent in posting is to be helpful.
When you advocate such a drill, without providing the specific details..., you risk folks copying the drill in a manner that will do more harm to their players than good....