HEIDENHAIN TNC 406 - Manual (Page 85)

64 4 Programming: Fundamentals, Files, Program Entry, Spark Erosion, Erosion Tables
4.7 P
ar
amet
ers in the Er
osion T
able
Power stage (NR)
The power stages determine the type of machining (roughing,
finishing or polishing).
Recommended input
„
Roughing NR = 15 to 10
„ Finishing NR = 10 to 6
„ Fine finishing NR = 6 to 1
„ Polishing NR = 5
Input range
15 (25) to 1 in decreasing order.
To change the power stage in the program
The current power stage is given by Q parameter Q99.
If you change Q99, you also change the power stage.
Low voltage current (LV)
Input range
0 to 99 in up to 100 increments.
High voltage current (HV)
Input range
0 to 9 in up to 10 increments.
Gap voltage (GV)
The TNC adjusts the width of the gap between the electrode and the
workpiece by controlling the gap voltage. The nominal gap voltage GV
should be chosen with care.
Setting
„ If the gap voltage is too high, the rate of stock removal will be too
low.
„ If the gap voltage is too low, irregularities will occur (arcing, short
circuiting).
The machine tool builder can give you information on this
erosion parameter. Refer to your machine tool manual.
The machine tool builder can give you information on this
erosion parameter. Refer to your machine tool manual.