Darc,
The default keyboard Jogging keys functions, distances, speed, directions, inter-action with other features ect.. are configured in the JOG.FIL file. For example use a negative value for GEAR to reverse the direction and then if need be a positive value back again when exiting the JOG.FIL file.
In addition to this you can reverse the polarity of the wiring and or use several other user definable methods for jogging by joy sticks, physical jog buttons, touch screens ect...
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