HEIDENHAIN TNC 320 User Manual page 284

Touch trigger probe, probing feed rate: F in
touch probe table
In F you define the feed rate at which the TNC is to probe the
workpiece.
Touch trigger probe, rapid traverse for
positioning: FMAX
In FMAX you define the feed rate at which the TNC pre-positions the
touch probe, or positions it between measuring points.
Touch trigger probe, rapid traverse for
positioning: F_PREPOS in touch probe table
In F_PREPOS you define whether the TNC is to position the touch probe
at the feed rate defined in FMAX or at rapid traverse.
Input value = FMAX_PROBE: Position at feed rate from FMAX
Input value = FMAX_MACHINE: Pre-position at rapid traverse
Multiple measurements
To increase measuring certainty, the TNC can run each probing
process up to three times in sequence. Define the number of
measurements in machine parameter Probe Settings >
Configuration of probe behavior > Automatic mode: Multiple
measurements with probe function. If the measured position values
differ too greatly, the TNC outputs an error message (the limit value is
defined in Confidence interval of multiple measurements). With
multiple measurements, it is possible to detect random errors, e.g.
from contamination.
If the measured values lie within the confidence interval, the TNC
saves the mean value of the measured positions.
Confidence interval of multiple measurements
When you perform a multiple measurement, you store the value that
the measured values may vary in Probe Settings > Configuration of
probe behavior > Automatic mode: Confidence interval of
multiple measurements. If the difference in the measured values
exceeds the value defined by you, the TNC outputs an error message.
284 Using Touch Probe Cycles