HEIDENHAIN TNC 406 - Manual (Page 158)

HEIDENHAIN TNC 406, TNC 416 137
8.4 Er
osion Cy
cles
8.4 Erosion Cycles
Overview
The TNC offers five erosion cycles:
„ Cycle 14 CONTOUR GEOMETRY
„ Cycle 16 ORBIT
„ Cycle 17 DISK
„
Cycle 2 ERO.TIME LIM.
„
Cycle 4 SPARK-OUT TIME
Cycle 14 CONTOUR GEOMETRY
The CONTOUR GEOMETRY cycle is a machining cycle. You use it to
cyclically erode a closed contour in the working plane with the
programmed feed rate. Gap control is effective in the eroding axis
which you defined in the cycle. You define the contour to be eroded in
a separate program. After the programmed eroding depth is reached
and the defined sparking-out distance is traversed, the TNC ends the
erosion cycle. The electrode does not retract automatically.
In Cycle 14 CONTOUR GEOMETRY you enter the
„ Eroding axis
„
Eroding depth
„ Miscellaneous function M
„ Contour program PGM
„ Sparking-out distance in percent PRC
If necessary, you may also use Q parameters for the cycle definition
of the eroding depth and the sparking-out distance.
Eroding axis and depth
The eroding axis determines the coordinate axis parallel to which
eroding takes place in the ”depth.”
The sign of the eroding depth determines whether the working
direction is the direction of the positive coordinate axis (depth +) or of
the negative coordinate axis (depth –).
You can enter the eroding depth in absolute or incremental
dimensions.
Miscellaneous function M
You can enter a miscellaneous function in Cycle 14 CONTOUR
GEOMETRY, such as M36 (eroding ON).