After more testing.....
To get problem to repeat i do the following...
1)Start Mach3 & Reference each axis starting with Z,Y,X
2)Make or open Gcode File.
3) Zero X and Y on part and Set Tool Offset
If i leave the Zero of X and Y at th Referance position, there is no problem, but if i move the X and Y and Zero, then comp move makes machine run off at full rapid in a big arc move.
After this i get a message when i try to rerun program. "Current point same as end point of arcLine 33" I then must restart Mach to get programs to run right.When i do a Regen. Toolpath after i move zero of part from the Ref. postition, then there is no problems.
On another test i did the following ......
1)Start Mach3,Reference each axis starting with Z,Y,X
2)Zero Xand Y on part,then Set Tool Offset
3) Make or open Gcode.
When i do this the Odd Comp move does not happen(at least not yet).
Troy