My set up seems to have developed a glitch.
in motor tunings the speeds are correct,Ive checked that with motor rpm /measurements.
But the DRO's on the home page are approx 32% too fast.
this is something that has happened recently,ive tried reinstalling but that hasnt worked.
 any Ideas?
  Tony

If the DRO you are looking at is the units per min one and you are doing a G0 moving 2 or more axis  then that is normal. What you are looking at is the blended speed so although the X and Y are moving at a certain rate they are moving diagonally so the actual tools path is much faster. If you are doing a programmed move such as a G1 then Mach should keep very close to the commanded feedrate defined by the F word.

Hood

no its a one axis straight line movement and all axis are effected.
 tony

Attach your xml and I will see if I can replicate here.
Hood

try that

All seems fine here, when I jog with the shift the DRO shows very close to the 2500 you have for your rapid. When I command a feed move it again shows close.
Can you take a look at the Frequency on the Diagnostics page and see what it says..
Hood

will do,when i get home. could it be anything to do with me messing with the cpu/memory speed on the motherboard? thinking about it,itseems that it all started playing up when I lost my bios settings.

Yes it could well do, I am guessing the frequency will be showing as 45KHz or so.
Hood

showing 41khtz the program is set at 35,have reloaded bios settings and no differance

I suspected it would be something like that. Seems your computer doesnt like the 35KHz, try setting the kernel  to 45KHz and restart Mach and see how it behaves.
Hood