
B--63003EN--1/02
9. SPINDLE SPEED FUNCTION
735
In a two--path lathe application, the additional path section (path No. 2)
can have the same spindle interface as a one--path lathe (see Section 9.2.).
Each spindle is controlled by a command issued by tool post 1 or 2.
Which spindle is controlled by which tool post can be switched bysignals.
This section describes the configuration of a two--path lathe application
and how it is controlled.
In the following description, the term tool post 1 refers to path No. 1, and
the term tool post 2 refers to path No. 2.
In a two--path lathe application, there are two selectable configurations,
a configuration in which the entire system uses one spindle (one--spindle
control) and a configuration in which each spindle is controlled separately
(two--spindle control). Parameter No. 3703#0 (2SP) is used to select a
configuration.
The spindle interface for tool post 2 is not used.
The spindle command select signal SLSPA<G063#2> (input) specifies
the tool post whose spindle command is to be followed by the spindle.
When a serial spindle is used, the position coder feedback signal is
supplied to both paths in the NC. Either tool post can be used for thread
cutting and feed per rotation.
Tool post 2
spindle
control
Tool post 1
spindle
control
S
#2
SLSPA
SIC
SPDL --2
JA41
SPDL --1
JA41
PC
#1
Feedback signal
PC
#1
Spindle
#1
Serial spindle
Feedback
Command
Feedback
S
#1
1
0
SUB CPU BOARD MOTHER BOARD
Command
Fig. 9.4 (a) One spindle control (serial spindle)
9.4
SPINDLE SPEED
CONTROL FOR
TWO-- PATH LATHE
General
One--spindle control and
two--spindle control
One--spindle control
D Selection of the spindle
command
D Position coder feedback
signal (serial spindle)