HEIDENHAIN TNC 640 User Manual page 480

12
Cycles: Turning | GEAR HOBBING (Cycle 880, DIN/ISO: G880)
Q533 Preferred dir. of incid. angle?: Selection
of alternate possibilities of inclination. The angle
of incidence you define is used by the TNC to
calculate the appropriate positioning of the tilting
axes present on the machine. In general there are
always two solution possibilities. Using parameter
Q533, configure which of the solution options the
TNC should apply:
0: Choose option with shortest way from the
current position
-1: Choose option at a range of between 0° and
-179.9999°
+1: Choose option at a range of between 0° and
+180°
-2: Choose option at a range of between -90° and
-179.9999°
+2: Choose option at a range of between +90° and
+180°
Q530 Inclined machining?: Position the tilting
axes for inclined machining:
1: Position the tilting axis automatically and orient
the tool tip (MOVE). The relative position between
the workpiece and tool remains unchanged. The
TNC performs a compensating movement with
the linear axes
2: Position the tilting axis automatically without
orienting the tool tip (TURN)
Q253Feed rate for pre-positioning?: Traversing
speed of the tool when tilting and pre-positioning,
and when positioning the tool axis between the
individual infeeds. Entry in mm/min. Input range
0 to 99999.9999 alternatively fmax, FAUTO,
PREDEF
Q553 TOOL:L offset, machining start?: Define
which section of the gear hob is to be used. As
gear hobbing causes wear to the hob teeth, the
tool can be offset in the longitudinal direction to
evenly apply the load over the entire length of the
tool. In parameter Q553 you enter an incremental
distance by which the tool is to be moved in the
longitudinal direction. Input range 0 to 99.9999
480
HEIDENHAIN | User's manual for cycle programming | 10/2017