Siemens SINUMERIK 840D sl Programming Manual page 539

Differential speed
A speed difference results in speed control mode and active synchronous spindle coupling
through signed overlay of an FS speed because of LS movement and an FS speed because
of spindle programming:
● Synchronous spindle coupling with
●
Velocity, acceleration: FA, ACC, OVRA, VELOLIMA
Axial velocity and acceleration of a following spindle can be programmed with:
●
●
●
●
When
References:
Programming Manual, Fundamentals
Note
A reduction or increase of the maximum axial jerk has no effect with spindles.
Further information about the axial dynamic response is provided in:
References:
Function Manual, Extended Functions; Rotary Axes (R2)
Job Planning
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
[
S<FS>=<speed> M<FS>=<direction of rotation>]
Note
Supplementary conditions
 Speed must also be reprogrammed with direction of rotation
S...
 Overlay of a spindle speed (
movement with synchronous spindle coupling
overlay has been enabled.
 The dynamic responses of the leading spindle have to be restricted to such an extent
that when overlaying is applied to the following spindle, its dynamics limit values are
not exceeded.
For more information about the speed difference, see:
References:
Function Manual, Extended Functions; Synchronous Spindle (S3)
or
FA[SPI(S<n>)] FA[S<n>]
or
ACC[SPI(S<n>)] ACC[S<n>]
and
OVRA[SPI(S<n>)] OVRA[S<n>]
and
VELOLIMA[SPI(S<n>)]
respectively)
= 1, 2, 3, ... (spindle numbers of the following spindles)
<n>
COUPONC
M<direction of rotation> S<FS>
(axial velocity)
(axial acceleration)
(axial override)
(increase and reduction of axial velocity
VELOLIMA[S<n>]
11.5 Synchronous spindle
/
M3 M4
) through the LS
only becomes effective if the
COUPONC
Axis couplings
.
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