Hi jrich124,
I think he means that the I and J parameters have to be in Incremental mode rather than Absolute mode. You put a G91 into your code just before the command that uses I and J.
Your parameters then move relative to the current spindle position; and not from the origin position (X0, Y0).
When the G2 or G3 or whatever other code uses I and J are finished, make sure you put in a G90 to tell Mach3 you want to be in Absolute mode.
For example, (this is for a mill)
G90 (set machine to Absolute mode)
G0 X10 (Rapid movement of the spindle to 10 units in X)
G91 (set machine to Increment mode)
X-2 (spindle will rapid to 8 - not back to to -2)
G90 (back to Absolute mode)
You will see that having the correct mode is extremely important for preventing a crash!
On your first picture, you can see that your machine has initialized to Absolute mode with the G90
These commands are to be written into your part code; they are not available as part of the configuration of the Mach3
software
When you are in the Mach3 screen, click on the G-Code button and look through the list - you will be able to read a description about each G code there.
Cheers,
Peter