Our lathe machine has GSK928TCa-l controller, we could only input absolute tool compensation,
but could not input inrement tool compensation.
For example, we need to add 0.1 to T0101 for Z axis, select the Z axis tool compensation and input 0.1,
the current value turns out 0.1, and the Z coordinate value on the main screen is 0.1 as well.
If need to input increment value, please press the "CHANGE" key instead of "INPUT" key.