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Many procedures have an Electrode Machining parameter.  This contains options for 2D orbit and Spark Gap + 3D orbit.

To use them correctly, you must realize that the true over burn on an electrode is made up of 2 values. The EDM process makes
a spark gap normal from every surface. This may be .0005 or .0015 or some other value depending on the power setting.
But it's a constant everywhere.
On top of that you orbit the electrodes. In the case of planar orbits, in the XY planes only. But orbit is a value added onto the spark gap.
These 2 together we often just generally call overburn.

In the electrode machining area, there are 2 inputs possible. You should use these both to do the best job for PLANAR orbiting.
Under spark gap + 3D orbit, put in the value you assume for spark gap. This will come off of all surfaces equally. What you enter
in for 2D orbit will only be applied as it should for the non-flat faces.

*Please note this option ONLY work for bull nose cutters. That is what you have to use. What Cimatron is doing is changing
the diameter of your cutter internally - but not changing the nose radius. Doing this results in a correct material removal for planar
orbits. (as we do not change the radius, a ball tool ends up as the same ball tool. It just doesn't work.)

If you want to cut the same amount of overburn from all surfaces (globally) for use in SPHERICAL orbits you can enter the entire
amount in the spark gap + 3D orbit and use any tool type you like, but doing so is the same as using the regular surface offset parameter..