Siemens Sinumerik 840D sl Programming Manual page 112

Feed control
8.4 Positioning spindles (SPOS, SPOSA, M19, M70, WAITS)
IPOBRKA:
WAITS:
Note
Three spindle positions are possible for each NC block.
Note
With incremental dimensions IC(<value>), spindle positioning can take place over several
revolutions.
Note
If position control was activated with SPCON prior to SPOS, this remains active until SPCOF is
issued.
Note
The control detects the transition to axis mode automatically from the program sequence.
Explicit programming of M70 in the part program is, therefore, essentially no longer necessary.
However, M70 can continue to be programmed, e.g. to increase the legibility of the part
program.
112
A block change is possible in the braking ramp.
Channel axis identifier
<axis>:
Instant in time of the block change with reference to the brak‐
<instant in
ing ramp
time>:
Unit:
Range of values:
If a value is not assigned to the <instant in time> pa‐
rameter, the current value of the setting data is applied:
SD43600 $SA_IPOBRAKE_BLOCK_EXCHANGE
Note:
IBOBRKA with an instant in time of "0" is identical to
IPOENDA.
Synchronization command for the specified spindle(s)
The subsequent blocks are not processed until the specified spindle(s) program‐
med in a previous NC block with SPOSA has (have) reached its (their) end posi‐
tion(s) (with exact stop fine).
WAITS after M5:
WAITS after M3/M4:
<n>,<m>:
Percent
100 (application point of the braking
ramp) to 0 (end of the braking ramp)
Wait for the specified spindle(s) to come to a standstill.
Wait for the specified spindle(s) to reach their setpoint
speed.
Numbers of the spindles to which the synchronization
command is to be applied.
If a spindle number is not specified or if the spindle
number is set to "0", WAITS will be applied to the
master spindle.
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals