HEIDENHAIN SW 548328-05 DIN Programming - Manual (Page 433)

HEIDENHAIN MANUALplus 620, CNC PILOT 620/640
433
5.2 T
o
uc
h pr
obe cy
cles f
or single-point measur
ement
5.2 Touch probe cycles for single-
point measurement
Single-point measurement for tool
compensation G770
Cycle G770 measures with the programmed measuring axis in the
specified direction. If the tolerance value defined in the cycle is
exceeded, the cycle saves the measured deviation either as tool
compensation or as an additive compensation. The result of the
measurement is saved additionally in the variable #i99 (See "Touch
probe cycles for automatic operation" on page 431.).
Cycle run
From the current position the touch probe moves along the defined
measuring axis toward the measuring point. When the stylus touches
the workpiece, the measured value is saved and the touch probe is
positioned back to the starting point.
The control outputs an error message if the touch probe does not
reach any touch point within the defined measuring path. If a
maximum deviation WE was programmed, the measuring point is
approached twice and the mean value is saved as result. If the
difference of the measurements is greater than the maximum
deviation WE, the program run is interrupted and an error message is
displayed.
Example: G770—Single-point measurement for
tool compensation
. . .
MACHINING
N3 G770 R1 D0 K20 AC0 BD0.2 WT3 V1 O1 Q0
P0 H0
. . .
Parameters
R Type of compensation:
 1: Tool compensation DX/DZ for turning tool or additive
compensation
 2: Recessing tool Dx/DS
 4: Milling tool DD
D Measuring axis: Axis in which the measurement is to be made
K Incremental measuring path with direction (signed): Maximum
measuring path for probing. The algebraic sign determines the
probing direction.
AC Nominal value for target position: Touch point coordinate
BD Tolerance +/-: Measurement result range in which no
compensation is applied
WT Compensation number T or G149:
 T
: Tool at turret position T to compensate the difference to
the nominal value
 G149
: Additive compensation D9xx to correct the difference to
the nominal value (only possible with compensation type R =1)
E Maximum compensation value for the tool compensation
WE Maximum deviation: Probe twice and monitor the dispersion of
the measured values