Spindle Function; Spindle Command - YASKAWA yasnac i80m Instruction Manual

2.9
SPINDLE FUNCTION (S FUNCTION)
Spindle Command
(1) The spindle speed {in
units of
r/min) can be directly
specified by
entering
a
5-dig'it
number following address S
(SC !
).
(2) The instructed S becomes effective from the
moment
the S-comniand
complete input signal (SFIN)
turns
on.
(3)
If S-specification is instructed in the same block as M03
{spindle
forward
rotation)
or
M04 (spindle reverse rotation),
the
program
normally advances
to
the
next
block after the spindle reaches the
speed specified by
S. For further information, refer
to
command or
reference manuals issued
by
your
machine
tool manufacturer.
2.9.1
luim Mu;:;
s
S MATCHED
I Oiiil
rpm
ACTUAL SPINDLE
SPEED
SIART
*
t
M
COMPLETE
START OF THE ABOVE BLOCK
Fig. 2.9.1 Spindle Command
(4)
The S-command is modal, so that once instructed, it remains valid
until another S-command is
given.
Even if MGS is instructed and the spindle actually
stops,
the
S-command is retained. Consequently, the previously instructed
S-command can
be started by instructing M03
(or
M04)
again.
(5) If
you
change an S-command after
the spindle is
started by M03
(or
M04), pay attention
to
the selected
range
of spindle speed.
1. The k>wer limit of S-command
(SO
and
its vicinity) is determined by
the main axis
motor
and varies with each machine. For details, refer
to
command
or
reference
.. manuals issued by
your
machine tool builder
2. Do
not
instruct
a
negative S-command.
102
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