Synchronous Spindle; Synchronous Spindle: Programming (Coupdef, Coupdel, Coupon, Couponc, Coupof, Coupofs, Coupres, Waitc) - Siemens SINUMERIK 840D sl Programming Manual

3.16.5

Synchronous spindle

Synchronous operation involves a following spindle (FS) and a leading spindle (LS), referred to
as the synchronous spindle pair. The following spindle imitates the movements of the leading
spindle when a coupling is active (synchronous operation) in accordance with the defined
functional interrelationship.
The synchronous spindle pairs for each machine can be assigned a fixed configuration by
means of channel-specific machine data or defined for specific applications via the CNC part
program. Up to two synchronized spindle pairs can be operated simultaneously on each NC
channel.
Refer to the part program for the following coupling actions
● Defined or changed
● Activated
● Deactivated
● Deleted
.
In addition, depending on the software status
● It is possible to wait for the synchronism conditions
● The block change method can be changed
● Either the setpoint coupling or actual value coupling type is selected or the angular offset
between master and following spindle specified
● When activating the coupling, previous programming of the following axis is transferred
● Either a measured or a known synchronism variance is corrected
3.16.5.1 Synchronous spindle: Programming (COUPDEF, COUPDEL, COUPON, COUPONC,
COUPOF, COUPOFS, COUPRES, WAITC)
The "Synchronous spindle" enables the speed-synchronous traversing of the following spindle
(FS) and leading spindle (LS) with a programmable transformation ratio.
The function supports the following modes:
● Speed synchronism (n
● Position synchronism (ϕ
● Position synchronism with angular offset (ϕ
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
= n )
FS LS
= ϕ )
FS LS
FS
= ϕ + ∆ϕ)
LS
Work preparation
3.16 Axis couplings
923