HEIDENHAIN TNC 640 User Manual page 638

17
QS400 Tolerance value? Enter here a tolerance
range that is monitored by the cycle. The tolerance
defines the deviation permitted along the surface
normals. This deviation is determined between the
nominal coordinate and the actual coordinate of
the component. (The surface normal is defined by
Q581 through Q583, and the nominal coordinate is
defined by Q263, Q264, and Q294) The tolerance
value is divided over the axes, depending on the
normal vector:
Example: QS400
allowance = nominal coordinate +0.4, lower
allowance = nominal coordinate –0.1. The following
tolerance range thus results for the cycle: "nominal
coordinate + 0.4" to "nominal coordinate – 0.1".
Example: QS400
= nominal coordinate +0.4, lower allowance =
nominal coordinate. The following tolerance range
thus results for the cycle: "nominal coordinate +
0.4" to "nominal coordinate".
Example: QS400
= nominal coordinate, lower allowance = nominal
coordinate –0.1. The following tolerance range
thus results for the cycle: "nominal coordinate" to
"nominal coordinate – 0.1".
Example: QS400
Example: QS400
Example: QS400
band.
Q309 Reaction to tolerance error? Specify
whether the TNC is to interrupt program run and
output a message if a deviation is detected:
0:
program run, do not output an error message
1:
run and output an error message
2:
surface normal vector is less than the nominal
coordinate, the TNC outputs a message and
interrupts program run. An undersize has occurred.
On the other hand, there is no error reaction if the
value determined along the surface normal vector
is greater than the nominal coordinate.
638
="0.4–0.1" means: upper
="0.4" means: upper allowance
="-0.1" means: upper allowance
=" " means: No tolerance band.
="0" means: No tolerance band.
="0.1+0.1" means: No tolerance
If the tolerance is exceeded, do not interrupt
If the tolerance is exceeded, interrupt program
If the determined actual coordinate along the
Touch Probe Cycles: Special Functions | 3D PROBING (Cycle 444)
HEIDENHAIN | User's manual for cycle programming | 10/2017