Touch Probe Cycles: Special Functions
16.4 3D PROBING (Cycle 444)
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HEIDENHAIN | TNC 320 | User’s manual for cycle programming | 9/2016
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 ="0.4–0.1" means: upper
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 ="0.4" means: upper allowance =
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 ="-0.1" means: upper allowance
= 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 =" " means: No tolerance band.
Example: QS400 ="0" means: No tolerance band.
Example: QS400 ="0.1+0.1" means: No tolerance
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: If the tolerance is exceeded, do not interrupt
program run, do not output an error message
1: If the tolerance is exceeded, interrupt program
run and output an error message
2: If the determined actual coordinate along the
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.
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