HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 298)

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Post-process measurement G915
Post-process measuring means that the workpiece is measured
outside the lathe and that the measurement results are transferred to
the CNC PILOT.
Prerequisites:
„ The measuring device and the CNC PILOT are connected by serial
interface
„ Communications protocol: 3964-R
The measuring device determines whether measured values or
compensation values are transferred. The measurement results are
evaluated by the NC program. A global measurement result should
be transferred to measuring position 0.
With G915, measured values are received from the post-process
measuring system and stored in the following variables:
„ V939: Global measurement result
„ V940 Measuring status
„ 0: No new measured values
„ 1: New measured values
„ V941 to V956 (corresponding to measuring points 1 to 16).
You can use the tool life monitoring in connection with post-process
measurement. If a tool is identified as worn out, the CNC PILOT
inserts a replacement tool.
If the post-process measurement detects a worn tool, the tool
diagnostics sets bit 5 (see “Tool programming” on page 121).
Parameters
H Block
„ H=0: Reserved
„ H=1: Pending measured values are uploaded
„ The post-process measuring status as well as the
measured values last received can be checked in
Automatic mode.
„ Evaluate the measurement status in order to avoid that
compensation values are accounted for twice or
incorrectly.