July 2013 6.12 Spindle 991
6.12.13 Software option 96—Advanced spindle interpolation
To be able to use additional functions for an interpolated spindle, you need
option 96. The prerequisite is that the spindle can be operated and positioned
as an axis. The PLC program and machine parameters must permit C-axis
operation for this. To activate the C-axis mode, the spindle is oriented to the
last saved position and then switched to axis mode. When positioning is
finished, the control loop opens and the current position freezes. If you want
to use this option, HEIDENHAIN recommends using the current PLC basic
program. The use of this option is already prepared as of version 55.
In combination with this option and the new Cycle 290 INTERPOLATION
TURNING, the iTNC530 can create a rotationally symmetric step,which is
defined by the starting and end point, in the active working plane. The center
of rotation is the tool location in the working plane at the time the cycle is
called. The rotational surfaces can be inclined or rounded relative to each
other.
In interpolation turning, the cutting edge of the tool moves on a circle, with the
cutting edge always oriented to the center of the circle. By varying the circle
radius and the axial position, any rotationally symmetric objects can be
produced in any working plane.
This cycle can only be used for finishing. Roughing operations with multiple
steps are not possible. The machining strategy can be chosen flexibly: from
the outside in or vice versa, and also from top to bottom or vice versa. This
results in four different machining strategies, which are distributed over the
four quadrants.
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