HEIDENHAIN TNC 426 (280 476) - Manual (Page 232)

HEIDENHAIN TNC 426, TNC 430 205
8.1 W
or
k
ing with Cy
cles
Working with the secondary axes U/V/W
The TNC performs infeed movements in the axis that was defined in
the TOOL CALL block as the spindle axis. It performs movements in
the working plane only in the principle axes X, Y or Z. Exceptions:
n You program secondary axes for the side lengths in cycles 3 SLOT
MILLING and 4 POCKET MILLING.
n You program secondary axes in the contour geometry subprogram
of an SL cycle.