Siemens SINUMERIK 840D sl Programming Manual page 550

Additional functions
13.5 Synchronous spindle
Speed ratio SR
T
The speed ratio is defined with parameters for FS (numerator) and LS (denominator).
Options:
• Following and leading spindle rotate at the same speed (n
• Rotation in the same or opposite direction (SR
• Following and leading spindles rotate at different speeds
Example:
N ... COUPDEF (S2, S1, 1.0, 4.0)
Meaning: the following spindle S2 and the leading spindle S1 rotate at a speed ratio of 0.25.
Note
The numerator must always be programmed. If no numerator is programmed, "1" is taken as
the default.
The speed ratio can also be changed on-the-fly, when the coupling is active.
13-18
(n = SR • n ;SR ≠ 1)
FS T LS T
Application: Polygonal turning
= n
FS
negative) between LS and FS
T
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
; SR positive
LS T
Job planning