Siemens SINUMERIK 840D

5
Special Motion Commands 04.00
5.7 Extended measurin
g
function MEASA
,
MEAWA
,
MEAC
5
840D
NCU 571
840D
NCU 572
NCU 573
810D
CCU 2
840Di

Siemens AG 2000. All rights reserved
5-178
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA)
−
04.00 Edition
Function
Axial measurement is available from SW version 4.
With this system, measurements can be taken
axially with several probes and several measuring
systems.
When MEASA, MEAWA is programmed, up to four
measured values are acquired for the programmed
axis in each measuring run and stored in system
variables in accordance with the trigger event.
MEASA and MEAWA are non-modal commands.
Continuous measuring operations can be executed
with MEAC. In this case, the measurement results
are stored in FIFO variables. The maximum number
of measured values per measuring run is also 4 with
MEAC.
Sequence
The measurements can be programmed in the part
program
or
from a synchronized action (Chapter 10).
Please note that only one measuring job can be
active at any given time for each axis.
Additional notes
•
The feed must be adjusted to suit the measuring
task in hand.
•
In the case of
MEASA
and
MEAWA
, the correctness
of results can be guaranteed only at feedrates with
which no more than one trigger event of the same
type and no more than 4 trigger events occur in each
position controller cycle.
•
In the case of continuous measurement with
MEAC
, the ratio between the interpolation cycle
and position control cycle must not exceed 8:1.