I originally thought it was an rapid override problem but I don't think so anymore so starting a new thread

On this mill, when the mode is set to TM0, the four jog settings (mode select 0) are
0=slow,
1=medium,
2=fast and
3=rapid
and they work as you expect when moving the table around

When we switch to TM1 (Rapid override), The override knob slows the travel down in any setting as it should but when set to full
The 3 (rapid) moves slower than 2 (fast)
0, 1 and 2 all seem to be the same as in TM0, but 3 is noticeable slower than 2

I would believe these are in a parameter somewhere but I have no book (and when I dropped to DOS the computer just rebooted so that's a different problem I'll have to ask about

Any help would be appreciated
Thanks
M