HEIDENHAIN TNC 640 (34059x-01) - Manual (Page 497)

HEIDENHAIN TNC 640 497
16.4 T
e
st Run
16.4 Test Run
Application
In the Test Run mode of operation you can simulate programs and
program sections to reduce programming errors during program run.
The TNC checks the programs for the following:
„ Geometrical incompatibilities
„ Missing data
„ Impossible jumps
„ Violation of the machine’s working space
The following functions are also available:
„ Blockwise test run
„ Interruption of test at any block
„ Optional block skip
„ Functions for graphic simulation
„ Measurement of machining time
„ Additional status display
Caution: Danger of collision!
The TNC cannot graphically simulate all traverse motions
actually performed by the machine. These include
„ Traverse motions during tool change, if the machine
manufacturer defined them in a tool-change macro or via
the PLC,
„ Positioning movements that the machine manufacturer
defined in an M-function macro,
„ Positioning movements that the machine manufacturer
performs via the PLC
HEIDENHAIN therefore recommends proceeding with
caution for every new program, even when the program
test did not output any error message, and no visible
damage to the workpiece occurred.
After a tool call, the TNC always starts a program test at
the following position:
„ In the machining plane at the position X=0, Y=0
„ In the tool axis, 1 mm above the MAX point defined in the
BLK FORM
If you call the same tool, the TNC resumes program
simulation from the position last programmed before the
tool call.
In order to ensure unambiguous behavior during program
run, after a tool change you should always move to a
position from which the TNC can position the tool for
machining without causing a collision.