Hi, Tom
Hold down your Shift Key and press an arrow key, Is it faster ?
Mach installs with a Feedrate set to 6 in a minute, Look on the Program Run screen and click on the Feedrate DRO type in 100 then enter, Now Hit the TAB key and click on the Slow Jog Rate DRO type in 100 then enter.
This will set you up for 100 in min with 100% of that for jogging, Not sure whether youll be able to go that fast, Just a start.
Look at some of the videos hear,
http://www.machsupport.com/videos/Ask your questions on the General Mach Discussion section, Probably get faster answers there.
Hope this Helps, Chip