FANUC Series 16/18/160/180-Model C for Lathe Operator Manual

PROGRAMMING
21. TWO–PATH CONTROL
FUNCTION
B–62754EN/01
386
The two–path control function supports two spindle interfaces. Thus,
16–TB can control a lathe that simultaneously machines a workpiece
attached to one spindle with two tool posts, or can control a lathe that
simultaneously machines a workpiece attached to each of two spindles
with two tool posts.
The former spindle control is referred to as 1–spindle control, and the
latter is referred to as 2–spindle control.
Parameter 2SP (No.3703#0) is used to select 1–spindle control or
2–spindle control.
One spindle is controlled by programmed commands for tool post 1 or
tool post 2. Programmed commands(Note 1) for the spindle can be
specified from either tool post. However, a spindle speed output selection
signal (Note 2) determines which commands from the two tool posts are
valid. The spindle is controlled according to the commands from a tool
post selected by the signal.
A feedback pulse signal from the position coder attache to the spindle is
applied to both tool posts. Such a feedback pulse signal is used for
processing such as thread cutting and feed per rotation with each tool post.
Two spindles, spindle 1 and spindle 2 (Note 3), are controlled
independently of each other according to programmed commands (Note
1) for each tool post. Usually, programmed commands for tool post 1 are
used to control spindle 1, and programmed commands for tool post 2 are
used to control spindle 2. Feedback pulse signals from the position coders
attached to spindle 1 and spindle 2 are applied to tool post 1 and tool post
2, respectively.
The spindle speed output selection signal (Note 2) can be used to specify
which spindle must be controlled by programmed commands for which
tool post. In addition, a spindle feedback input selection signal (Note 2)
can be used to specify which spindle must be controlled by programmed
commands for which tool post. In addition, a spindle feedback input
selection signal (Note 2) can be used to specify which tool post must
receieve a feedback signal from which spindle. Thus, tool post 1 can
control spindle 2, and tool post 2 can control spindle 1.
21.6
SPINDLE CONTROL
IN TWO–PATH
CONTROL
Explanations
D 1–spindle control
D 2–spindle control

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