HEIDENHAIN ITNC 530 - CYCLE PROGRAMMING User Manual page 496

MP6507 determines the calculation of the probing feed rate:
MP6507=0:
The measuring tolerance remains constant regardless of the tool
radius. With very large tools, however, the feed rate for probing is
reduced to zero. The smaller you set the maximum permissible
rotational speed (MP6570) and the permissible tolerance (MP6510),
the sooner you will encounter this effect.
MP6507=1:
The measuring tolerance is adjusted relative to the size of the tool
radius. This ensures a sufficient feed rate for probing even with large
tool radii. The TNC adjusts the measuring tolerance according to the
following table:
Tool radius
Up to 30 mm
30 to 60 mm
60 to 90 mm
90 to 120 mm
MP6507=2:
The feed rate for probing remains constant, the error of measurement,
however, rises linearly with the increase in tool radius:
Measuring tolerance = (r • MP6510)/ 5 mm), where
r Active tool radius in mm
MP6510 Maximum permissible error of measurement
496
Measuring tolerance
MP6510
2 • MP6510
3 • MP6510
4 • MP6510
Touch Probe Cycles: Automatic Tool Measurement