HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 401)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 401
4.29 Other G codes
Transition to eccentric G726
G726 is used to machine turning contours outside the original turning
center. In addition, G726 offers the possibility to continuously change
the position of the turning center along a straight line or a curve.
The turning contours are programmed using separate turning cycles.
Machine and control must be specially prepared by the
machine tool builder for use of this cycle. Refer to your
machine manual.
Prerequisites:
 Software option Y-Axis Machining
 Software option Synchronizing Functions
Parameters
H Activate coupling
 H=0: Deactivate coupling
 H=1: Activate coupling
Q Reference spindle: Number of the spindle that is coupled
with the X and Y axes (machine-dependent)
R Center offset at Z start: Distance between the eccentric
center and the original turning center (radius value)
C C position at Z start: C-axis angle of the center offset
F Maximum rapid traverse: Permissible rapid traverse for the
X and Y axes while coupling is active
V Direction reversal in Y (machine-dependent)
 V=0: The control uses the configured axis direction for Y-
axis movements
 V=1: The control reverses the configured axis direction
for Y-axis movements
Z Z start: Reference value for the parameters R and C, as well
as coordinate for tool pre-positioning
K Z end: Reference value for the parameters W and U
W Delta C [Z start – Z end]: Difference in C-axis angle between
Z start and Z end
U Center offset at Z end: Distance between the eccentric
center and the original turning center (radius value)