Switchover Modes For Dryrun And Skip Levels - Siemens SINUMERIK 802D sl Programming Manual

Enhanced Level Commands
4.11 Additional functions
N500 X-20
N600 M99
Y
10
30
Fig. 4-32 Contour repetition using G72.2
N10 G00 G90 X0 Y0
N20 G01 G17 G41 X30. Y0 D01 F1000
N30 Y10.
N40 X30.
N50 G72.2 P2000 L3 I80. J0
O2000 G90 G01 X40.
N100 Y30.
N200 G01 X80.
N300 G01 Y10.
N400 X90.
N500 M99
4.11.2

Switchover modes for DryRun and skip levels

Switching over the skip levels (DB21 DBB2) always constitutes an intervention in
the program run, resulting in a brief drop in velocity along the path in earlier SW
versions. The same applies to the switchover of DryRun mode (DryRun = dry run
feedrate DB21.DBB0.BIT6) from DryRunOff to DryRunOn or vice versa.
With a new switchover mode that has limited functionality, it is now possible to
avoid the drop in velocity.
By setting machine data $MN_SLASH_MASK==2, it is no longer necessary to re-
duce the velocity when the skip levels are switched (i.e. a new value in the
PLC-->NCK Chan interface DB21.DBB2).
4-166
SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D ISO Milling (PGM) -- 04.07 Edition
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04.07
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