Siemens SINUMERIK 840D Programming Manual page 122

3
Milling Cycles
3.2 Preconditions
Spindle programming
The spindle commands in the cycles always refer to the
active master spindle of the control.
If you want to use a cycle on a machine with several
spindles, you must first define the spindle that is to be
used as the master spindle with the command SETMS
(see also Programming Guide).
Machining status messages
Status messages are displayed on the control
monitor during the processing of milling cycles.
The following messages might be displayed:
• "Elongated hole <No.>(first figure) is being
machined"
• "Slot <No.>(other figure) is being machined"
• "Circumferential slot <No.>(last figure) is being
machined".
In each case <No.> stands for the number of the
figure that is currently being machined.
These messages do not interrupt program processing
and continue to be displayed until the next message is
displayed or the cycle is completed.
Cycle setting data
A few parameters of milling cycles (SW 4 and higher)
and their behavior can be modified by cycle settings.
The cycle setting data are defined in data block
GUD7.DEF.
The following new cycle setting data are introduced:
_ZSD[x] Value
_ZSD[1] 0
1
_ZSD[2] 0
1
_ZSD[5] 0
1
3-122
Meaning
Depth computation in the new cycles is made between the
reference plane + safety distance and depth
(_RFP + _SDIS - _DP)
Depth computation is made without including safety
distance
Dimension of rectangular pocket or rectangular spigot
from the center point
Dimension of rectangular pocket or rectangular spigot
from a corner
Execute at drilling depth M5 M0
Execute at drilling depth M5
SINUMERIK 840D/840Di/810D Programming Guide Cycles (PGZ) – 11.02 Edition
3
12.97
12.98
Cycles affected
POCKET1 to
POCKET4,
LONGHOLE,
CYCLE71, SLOT1,
CYCLE72, SLOT2
POCKET3
CYCLE76
CYCLE88
© Siemens AG, 2002. All rights reserved