Siemens SINUMERIK Series Function Manual

S3: Synchronous spindle
13.4 Points to note
Extended Functions
738 Function Manual, 03/2013, 6FC5397-1BP40-3BA1
13.4.4 Differential speed between leading and following spindles
When does a differential speed occur?
A differential speed develops, e.g. with turning machine applications, when two spindles are
opposite each other. Through the signed addition of two speed sources, a speed component
is derived from the leading spindle via the coupling factor. In addition to this, it is possible to
program the following for the following spindle:
● speed with S... and
● direction of rotation with M3, M4 or M5
The spindles can normally be synchronized by a coupling factor with the value '-1'. This sign
reversal then results in a differential speed for the following spindle as compared to an
additional programmed speed. This typical behavior in relation to the NC is illustrated in the
following diagram.
6HWVSHHG

(QDEOHE\
3/&
$FWXDO
VSHHG

6IROORZLQJVSLQGOH
0 6 
6OHDGLQJVSLQGOH
06
USP
USP
USP
USP

&28321
&RXSOLQJIDFWRU 
[
6SHHG
LQWHUSRODWRU
0
0
6SHHG
LQWHUSRODWRU
Figure 13-4 Schematic representation of process resulting in differential speed
Example
Program code Comment
N01 M3 S500 ; S1 rotates positively at 500 rpm
; the master spindle is spindle 1
N02 M2=3 S2=300 , S2 rotates positively at 300 rpm

Siemens SINUMERIK Series Specifications

General

Axes Control	Up to 31 axes
Category	Control Unit
Manufacturer	Siemens
Series	SINUMERIK
Control Type	CNC
Communication Interfaces	Ethernet, USB
Operating Temperature	0°C to 45°C
Protection Class	IP20
Power Supply	24V DC
Display	Color TFT LCD