HEIDENHAIN TNC 640 (34059x-04) Cycle programming User Manual
Page 301
ADAPT ROTARY COORDINATE SYSTEM
(Cycle 800, DIN/ISO: G800)
13.2
13
TNC 640 | User's Manual Cycle Programming | 3/2014
301
If the axis of the milling spindle and the axis of the turning spindle
are aligned parallel to each other, you can use
PRECESSION ANGLE
Q497 to define any desired rotation of the coordinate system
around the spindle axis (Z axis). This may be necessary if you have
to bring the tool into a specific position due to space restrictions or
if you want to improve your ability to observe a machining process.
If the axis of the turning spindle is not aligned parallel to the axis
of the milling spindle, only two precession angles are useful for
machining. The TNC selects the angle that is closest to the input
value
Q497.
Cycle 800 positions the milling spindle such that the cutting edge
is aligned relative to the turning contour. You can also use the
mirrored tool (
REVERSE TOOL Q498), thereby moving the position
of the milling spindle by 180°. In this way you can use a tool for
both inside and outside machining. Position the cutting edge at the
center of the turning spindle using a positioning block, such as
L Y
+0 R0 FMAX.