Siemens SINUMERIK 840D sl Function Manual page 1210

S1: Spindles
16.2 Modes
Coordination actions in the part program have the following advantages:
● The part program author can decide at what point in the program the spindle needs to be
up to speed, e.g. in order to start machining a workpiece.
● This avoids unnecessary delays.
Coordination in the part program involves programming the WAITS command:
WAITS:
WAITS[<n>]:
WAITS[<n>,<m>,...]:
Coordination error
The part program author must ensure that one of the following maintenance conditions occurs
for WAITS.
● Position reached
● Spindle stationary
● Spindle up to programmed speed
In cases where one spindle is used in several channels, the part program author must ensure
that WAITS starts at the earliest in the phase in which the spindle from another channel has
already started to accelerate or decelerate towards the required new speed or direction of
rotation.
The control waits before executing subsequent blocks until:
● Position(s) programmed with SPOSA are reached.
● Spindle standstill is reached with M5:
DB31, ..., DBX 61.4 (spindle stationary)
taking into account the tolerance:
MD36060 $MA_STANDSTILL_VELO_TOL
WAITS is terminated and the next block loaded when the first occurrence of the signal is
detected.
● In M3/M4 (speed control mode), the speed in the setpoint range is:
DB31, ..., DBX83.5 (spindle in setpoint range)
taking into account the tolerance:
MD35150 $MA_SPIND_DES_VELO_TOL
WAITS is terminated and the next block loaded when the first occurrence of the signal is
detected.
This WAITS function applies in the programmed channel.
WAITS can be used to wait for all spindles known to this channel, although spindles may
also have been started in other channels.
1210
CAUTION
for main spindle (master spindle)
for spindles with number <n>
for several spindles up to the maximum number of spindles
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions