HEIDENHAIN TNC 406 - Manual (Page 89)

68 4 Programming: Fundamentals, Files, Program Entry, Spark Erosion, Erosion Tables
4.7 P
ar
amet
ers in the Er
osion T
able
Stock removal SR
The stock removal is the volume of removed workpiece material (Vw)
per unit of time.
Stock removal is measured in ccm/minute.
Two-times gap (2G)
During the erosion process, a minimum gap G must be maintained
between the electrode and the workpiece. The higher the current, the
larger the gap (G = radial gap) can (and should) be.
Minimum for the two-times gap
The two-times gap 2G is the minimum total gap (2 x G in millimeters)
that must be maintained in the cavity between the electrode and the
workpiece (2G = diametrical gap).
Vw
G G Rmax Rmax