MEASURE COORDINATE (Cycle 427, DIN/ISO: G427) 15.11
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HEIDENHAIN | TNC 320 | User’s manual for cycle programming | 9/2016
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15.11 MEASURE COORDINATE (Cycle 427,
DIN/ISO: G427)
Cycle run
Touch Probe Cycle 427 finds a coordinate in a selectable axis
and saves the value in a system parameter. If you define the
corresponding tolerance values in the cycle, the TNC makes a
nominal-to-actual value comparison and saves the deviation value in
system parameters.
1 Following the positioning logic, the TNC positions the touch
probe at rapid traverse (value from FMAX column) (see
"Executing touch probe cycles", page 299) to touch point 1.
The TNC offsets the touch probe by the safety clearance in the
direction opposite to the defined traverse direction.
2 Then the TNC positions the touch probe to the entered touch
point 1 in the working plane and measures the actual value in
the selected axis.
3 Finally the TNC returns the touch probe to the clearance
height and saves the measured coordinate in the following Q
parameter.
Parameter number Meaning
Q160 Measured coordinate
Please note while programming:
Before a cycle definition you must have programmed
a tool call to define the touch probe axis.
If an axis of the active working plane is defined
as measuring axis (Q272 = 1 or 2), the TNC
compensates the tool radius. From the defined
traversing direction (Q267) the TNC determines the
direction of compensation.
If the touch probe axis is defined as measuring axis
(Q272 = 3), the TNC compensates the tool length.
Parameters Q498 and Q531 have no effect in this
cycle. You do not need to make any entries. These
parameters have only been integrated for reasons of
compatibility. If, for example, you import a program
of the contouring control for turning and milling,
TNC 640, you will not receive an error message.
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