HEIDENHAIN TNC 426B (280 472) Touch Probe Cycles - Manual (Page 83)

HEIDENHAIN TNC 426, TNC 430 71
3.3 A
u
to
matic W
o
rk
piece Measur
ement
Tool monitoring
For some cycles for workpiece inspection you can have the TNC
conduct tool monitoring. The TNC then monitors whether
n The tool radius should be compensated because of the deviations
from the nominal value (values in Q16x).
n The deviations from the nominal value (values in Q16x) are greater
than the tool breakage tolerance.
Tool compensation
The TNC always compensates the tool radius in the DR column of the
tool table, even if the measured deviation lies within the given
tolerance. You can inquire whether re-working is necessary via
Parameter Q181 in the NC program (Q181=1: must be reworked).
For Cycle 427:
n If an axis of the active working plane is defined as measuring axis
(Q272 = 1 or 2), the TNC compensates the tool radius as described
above. From the defined traversing direction (Q267) the TNC
determines the direction of compensation.
n If the touch probe axis is defined as measuring axis (Q272 = 3), the
TNC compensates the tool length.
Tool breakage monitoring
The TNC will output an error message and stop program run if the
measured deviation is greater than the breakage tolerance of the tool.
At the same time the tool will be deactivated in the tool table (column
TL = L).
Reference system for measurement results
The TNC transfers all the measurement results to the results
parameter and the protocol file in the active coordinate system, or as
the case may be, the displaced coordinate system.
This function works only:
n
If the tool table is active.
n
If tool monitoring is switched on in the cycle (enter Q330
not equal to 0).
This function works only:
n
If the tool table is active.
n If tool monitoring is switched on in the cycle (enter Q330
not equal to 0).
n If the breakage tolerance RBREAK for the tool number
entered in the table is greater than 0 (see also the User's
Manual, section 5.2 “Tool Data”).