Have you tried changing the units to inches per sec etc. Never know what might happen!
You can try changing the step and acceleration settings and see what happens also.
To Student 1616
Linkmotion is a printer driver for laser engraver/cutters. it sits in the background until you print something from, say, Corel Draw then it opens up and you can get it to do it's thing. You can also run it on it's own to set up your cutting position, feed rates, material settings etc and also run a rotary attachment.
I am not completely useless.......I can always serve as a BAD example.