Siemens SINUMERIK 840D sl Programming Manual page 284

Measuring variants
3.6 Measure tool (milling)
Requirements
● The exact length and radius of the calibration tool must be stored in a tool offset data record.
This tool offset must be active when the measuring cycle is called.
● Tool type:
– Calibration tool (type 725)
– Milling tool (type 1xy)
● The machining plane G17 or G18 or G19 must be defined prior to the cycle call.
● The approximate coordinates of the tool probe must be entered in the general setting data
before calibration starts (see Commissioning Manual
SINUMERIK 840D sl , Chapter "Tool measurement in milling").
These values are used for automatic approach to the probe with the calibration tool and
their absolute value must not deviate from the actual value by more than the value in
parameter TSA.
● The probe must be reached within the total path 2 x DFA.
Starting position before the measurement
For "axis-by-axis" calibration, from the starting position, the cycle calculates the approach
distance to the probe and generates the appropriate traversing blocks. It must be ensured that
a collision-free approach is possible.
①
②
Figure 3-35
Note
Calibrating in the 3rd axis of the measuring plane
If the tool diameter is larger, the calibration tool is positioned, offset by the tool radius, to the
center of the probe. The value of the offset is subtracted.
For "complete" calibration, the position before the cycle call should be selected so that a
collision-free, centered approach is possible above the probe center by measuring path DFA.
284
1 2
General SD 54626 $SNS_MEA_TP_TRIG_PLUS_DIR_AX1
General SD 54625 $SNS_MEA_TP_TRIG_MINUS_DIR_AX1
Starting positions for calibration in the plane, example: G17
SINUMERIK Operate (IM9) /
Programming Manual, 12/2017, 6FC5398-4BP40-6BA1
Measuring cycles