HEIDENHAIN TNC 426 CB, Technical Manual

Page: 407 / 1135

December 2001 Tilting Axes 6 – 77
6.5.5 “Tilt Working Plane” Feature
The user defines the position of the working plane in Cycle 19, “Tilted Working
Plane.” Then the TNC performs a coordinate transformation.
With the 3D ROT soft key you can activate the tilted working plane separately
for the MANUAL and PROGRAM RUN operating modes.
With MP7500 you can define the function of the tilted working plane cycle.
With
FN18: SYSREAD ID290 NR2 you can request the values of the individual
bits from MP7500.
Assignment of
input values
(Cycle 19) With MP7500 bit 1 you define whether the input applies to the position of the
tilted axes (bit 1 = 0) or the position of the working plane (bit 1 = 1).
If the input value applies to the position of the working plane, the TNC
calculates the position of the tilting axes and saves the coordinates in Q
parameters:
n
Q120: Coordinate of the A axis
n
Q121: Coordinate of the B axis
n
Q122: Coordinate of the C axis
With FN17:SYSWRITE ID990 NR5 IDX5 you can determine if a principle axis is
shown on top of another principle axis in an untilted coordinate system due to
a tilt motion.
Automatic
positioning After the coordinate transformation, the Z axis remains parallel to the
tool axis, perpendicular to the X/Y plane.
With MP7500 bit 2 you define
whether the “tilted working plane” function automatically positions the tilting
axes (bit 2 = 1). In this case the user can enter the feed rate and setup
clearance in the cycle.
The TNC then moves automatically to the setup clearance and interpolates the
swivel and principle axes so that the tool point remains in the same position in
the tilted coordinate system.