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When a spindle
speed requiring
a new gear range, is programmed,
the markers
will be set as follows:
A new gear range is necessary:
the analogue voltage for the
previous
spindle
speed is reduced
-10 0, the control
sets the
markers
for the gear range code and then (0 or 20 ms delay)
the marker
for the strobe signal.
c
After
the PLC-programme
has recognised
the strobe signal as logic
"I",
the gear range code must be decoded
in the PLC-part
of
the control
and output.
The NC-part
of the control
waits
for
the feedback
"gear code complete".
+
An analogue voltage can be output
for changing
gear. For
this purpose
the markers
2490 and 2491 must be correspondingly
set in the PLC-part:
the markers
initiate
the rotation
of the
spindle
in a clockwise
(marker
2491)
or in an anticlockwise
(marker
2490)
direction,
the analogue voltage
level is set
in machine
parameter
70. The markers
2490 and 2491 will
be
referred
to by the NC-part
of tt-e control
only during
the output
of the G-strobe
signal.
i
After
the gearchange
is complete,
marker
2480 for the feedback
signal must be set by the PLC-programme.
The direction
of rotation
of the spindle
is determ
ned in the PLC-programme
by markers
2485 to 2487. The status clisplay M 03, M 04, and M 05
is generated
in the VDU-screen,
simultaneously
with
these markers.
After
the gearchange
is complete,
the control
outputs
the relevant
analogue voltage
(determined
by machine
parameters
86, 87,88,
89).
For an example
of the programming
of the analogue spindle speed, please refer to section
D 3.
C 2.2.6)
Marker
for tapping
cycle
Marker
No.
Function
2048
Tapping
cycle is called-up
Signal direction
NC-PI-C
If the tapping
cycle is called, "1"
is set for marker
2048.
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