Well, your program has no G0 - rapid moves.
Depending on how M6 and G83 was written, they may contain rapid moves.
Test your machine with a G0 move. If you want to go faster, change the maximum speed in CNCsetup. You need to watch for performance issues with your steppers or servos when making changes here.
There is also a RAPIDSPEED command so you can change the maximum speed in any of your macros. I'd do a search on your .cbk for this command to see if this is used anywhere.