Siemens sinumerik 840d Programming Manual page 180
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Special Motion Commands
5
5.7 Extended measuring function MEASA, MEAWA, MEAC
840D
840D
NCU 571
NCU 572
NCU 573
Measurement with and without delete
distance-to-go
When command MEASA is programmed, the
distance-to-go is not deleted until all required
measured values have been recorded.
The MEAWA function is employed in the case of
special measuring tasks where a programmed
position must always be approached.
MEASA and MEAWA can be programmed in the
same block.
If MEASA/MEAWA is programmed with
MEAS/MEAW in the same block, an error message
is output.
• MEASA cannot be programmed in synchronized
actions.
As an alternative, MEAWA plus the deletion of
distance-to-go can be programmed as a
synchronized action.
• If the measuring job with MEAWA is started from
the synchronized actions, the measured values
will only be available in machine coordinates.
Measurement results
The results of measurements are available under the
following system variables:
• In machine coordinate system:
$AA_MM1[axis]
...
$AA_MM4[axis]
• In workpiece coordinate system:
$AA_WM1[axis]
...
$AA_WM4[axis]
5-180
810D
840Di
CCU 2
for MEASA, MEAWA
Measured value of programmed measuring system on trigger event 1
...
Measured value of programmed measuring system on trigger event 4
Measured value of programmed measuring system on trigger event 1
...
Measured value of programmed measuring system on trigger event 4
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition
V
TE1 TE2
TE3 TE4
Programmed path
Siemens AG 2000. All rights reserved
04.00
5
t
Distance
to go
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