HEIDENHAIN TNC 430 - Describing Contours through Mathematical Operations

HEIDENHAIN TNC 426, TNC 430 333
8.8 Coordinate Transformation Cycles
Combining coordinate transformation cycles
When combining coordinate transformation cycles, always make sure
the working plane is swiveled around the active datum. You can
program a datum shift before activating Cycle 19. In this case, you are
shifting the “machine-based coordinate system.”
If you program a datum shift after having activated Cycle 19, you are
shifting the “tilted coordinate system.”
Important: When resetting the cycles, use the reverse sequence used
for defining the them:
Automatic workpiece measurement in the tilted system
The TNC measuring cycles enable you to have the TNC measure a work-
piece in a tilted system automatically. The TNC stores the measured
data in Q parameters for further processing (for example, for printout).
Procedure for working with Cycle 19 WORKING PLANE
1 Write the program
U Define the tool (not required, when TOOL.T is active), and enter the
full tool length.
U Call the tool.
U Retract the tool in the tool axis to a position where there is no
danger of collision with the workpiece (clamping devices) during
tilting.
U If required, position the tilt axis or axes with an L block to the
appropriate angular value(s) (depending on a machine parameter).
U Activate datum shift if required.
U Define Cycle 19 WORKING PLANE; enter the angular values for the
tilt axes.
U Traverse all main axes (X, Y, Z) to activate compensation.
U Write the program as if the machining process were to be executed
in a non-tilted plane.
U If required, define Cycle 19 WORKING PLANE with other angular
values to execute machining in a different axis position. In this case,
it is not necessary to reset Cycle 19. You can define the new angular
values directly.
U Reset Cycle 19 WORKING PLANE; program 0° for all tilt axes.
U Disable the WORKING PLANE function; redefine Cycle 19 and
answer the dialog question with NO ENT.
U Reset datum shift if required.
U Position the tilt axes to the 0° position, if required.
1. Activate the datum shift.
2nd: Activate tilting function.
3rd: Activate rotation.
...
Machining
...
1st: Reset the rotation.
2nd: Reset the tilting function.
3rd: Reset the datum shift.