Siemens SINUMERIK 840D sl Function Manual page 791

MD30455 $MA_MISC_FUNCTION_MASK
Bit 5=0: Synchronous spindle coupling, following spindle:
Position control, feedforward control and parameter block are set for the following spindle.
Bit 5=1: Synchronous spindle coupling:
The control parameters of the following spindle are set as in an uncoupled scenario.
References:
Function Manual Basic Functions; Velocities, Setpoint / Actual Value Systems, Closed-Loop
Control (G2)
Automatic transfer of the LS parameters for synchronous operation
For the automatic dynamic response adaptation for FS and LS, for synchronous operation, the
parameter values for the position control, feedforward control and parameter records of the
FS can be transferred from the LS:
MD30455 $MA_MISC_FUNCTION_MASK, Bit 5
Separate dynamic response for spindle and axis operations
In spindle and axis operations, dynamic programming FA, OVRA, ACC and VELOLIMA can
be set separately from one another with the following MD:
MD30455 $MA_MISK_FUNCTION_MASK Bit 6=0
Assignment is undertaken by the programmed axis or spindle name. For example, in spindle
operation, VELOLIMA[S1]=50 therefore only reduces the maximum speed to 50% and in axis
operation, VELOLIMA[C]=50 only reduces the maximum speed to 50%.
If, for example, VELOLIMA[S1]=50 and VELOLIMA[C]=50 are to have the same effect as
before with this machine data, the programming of FA, OVRA, ACC and VELOLIM have an
effect regardless of the programmed names:
MD30455 $MA_MISK_FUNCTION_MASK Bit 6=1
Knee-shaped acceleration characteristic
For the leading spindle, the effect of a knee-shaped acceleration characteristic on the following
spindle is identified by the following axis-specific machine data:
● MD35220 $MA_ACCEL_REDUCTION_SPEED_POINT (speed for reduced acceleration)
and
● MD35230 $MA_ACCEL_REDUCTION_FACTOR (reduced acceleration).
If MD35242 $MA_ACCEL_REDUCTION_TYPE is present, it is also used to configure the type
of acceleration reduction. Otherwise a hyperbolic drop in acceleration is assumed.
If the dynamic response of a following spindle is lower than that of the leading spindle when
the coupling factor is taken into account, the leading spindle dynamic response is reduced to
the required level while the coupling is active.
The acceleration should be constant over the entire speed range for the following spindle.
However, if a knee-shaped acceleration characteristic is also stored in the above-mentioned
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
S3: Synchronous spindle
14.4 Points to note
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