Siemens sinumerik 840d Programming Manual page 432

Additional Functions
13
13.3 Synchronized spindle
840D 840D
NCU 571 NCU 572
NCU 573
Function
In synchronized mode, there is a leading spindle
(LS) and a following spindle (FS). They are referred
to as the synchronized spindle pair
spindle follows the movements of the leading spindle
when the coupling is active (synchronized mode) in
accordance with the functional relationship specified
in the parameters.
This function enables turning machines to perform
workpiece transfer from spindle 1 to spindle 2 on-
the-fly, e.g. for final machining. This avoids
downtime caused, for example, by rechucking.
The transfer of the workpiece can be performed
with:
• Speed synchronism (n
• Position synchronism (ϕ
• Position synchronism with angular offset
= ϕ + ∆ϕ )
(ϕ
FS LS
A speed ratio k
Ü
main spindle and a "tool spindle" for multi-edge
machining (polygon turning).
The synchronized spindle pair can be defined
permanently for each machine with channel-specific
machine data or defined by the user in the CNC part
program.
Up to two synchronized spindle pairs can be
operated simultaneously on each NC channel.
13-432
840Di
. The following
= n )
FS LS
= ϕ )
FS LS
can also be specified between the
Spindle 1
Spindle 1
Spindle 1
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
12.98
Chuck
n1 n2
Spindle 2
n1 n2
Spindle 2
n1 n2
Spindle 2
n2 n1
 Siemens AG 2000. All rights reserved
13