Quote Originally Posted by Lewywri89 View Post
ive tried all sorts of step per in motor tuning etc
also tried lots of different micro step setting
That tells me nothing and Steps per isn't something you guess at it's a fixed number dependant on screw Pitch and Micro stepping.

One thing that could be doing this is if you have the Units set to Inch but using Millimeter to calculate Steps per.

Quote Originally Posted by Lewywri89 View Post
because they work with the pro tuner software which connects to the serial port Tells me it's either parallel port related or breakout board
No if you can Jog around then everything is working as it should. The only thing that could limit speed is if you have the JOG speed set low.