HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 282)

HEIDENHAIN TNC 410, TNC 426, TNC 430 267
Overlap factor: Q112
The overlap factor for pocket milling (MP7430) is assigned to Q112.
Unit of measurement for dimensions in the program: Q113
The value of parameter Q113 specifies whether the highest-level
NC program (for nesting with %...) is programmed in millimeters or
inches.
Dimensions of the main program Parameter value
Metric system (mm) Q113 = 0
Inch system (inches) Q113 = 1
Tool length: Q114
The current value for the tool length is assigned to Q114.
Coordinates after probing during program run
The parameters Q115 to Q119 contain the coordinates of the
spindle position at the moment of contact during programmed
measurement with the 3-D touch probe.
The length and radius of the probe tip are not compensated in
these coordinates.
Coordinate axis Parameter
X axis Q115
Y axis Q116
Z axis Q117
IVth axis Q118
Vth axis (not TNC 410) Q119
Deviation between actual value and nominal value during
automatic tool measurement with the TT 120 (only
conversational dialog)
Actual-nominal deviation Parameter
Tool length Q115
Tool radius Q116
Tilting the working plane with mathematical angles: Rotary axis
coordinates calculated by the TNC (not TNC 410)
Coordinates Parameter
A axis Q120
B axis Q121
C axis Q122
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