Hello Chaps -- please suggest a solution.
 I am using mach3 on a lathe.
At the start of the code i set the  f=0.1  (mm) as the code runs i use
a m0 to stop the spindle so i can measure the size . when i use m4 to
start the spindle the feed rate has changed to about 10% of the original
setting and the DRO shows feedrate at about .04 ??
any idea what i am doing wrong??

regards

fred in South africa