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Chapter Eight Spindle Velocity Function
135
Volume
III Function
value outputting to the machine’s spindle..
Actual output analog voltage value = spindle controlled S value x spindle override.
Signal Spindle override code detection signal (G019#0~G019#2)
[Input]
Signal input
[Function]
It is the spindle override code detection signal
Totally, there are 3 binary system code signals of the spindle override code detection
signal which is corresponding to the override:
So, the spindle override can be selected based upon the 10% unit within the 50~120%.
When the spindle speed control is performed instead of using the spindle speed override,
the setting override value is 100%.
Notice:
The spindle speed override function in the tapping cycle and thread cutting is disabled.
Gear shift treatment
Although the S code is spindle speed, its actual controlled member is spindle motor, and
therefore, the CNC should be affirmed the corresponding relations between spindle motor speed and
gear. The CNC selects the gear shift based upon the defined speed range of each gear shift in
advance, as it is directly selected by S code. The PLC can be selected the corresponding gear shift
using its selection signal (GR3, GR2 and GR1). Simultaneously, the CNC outputs the spindle motor
speed based upon the selected gear shift. Specify the S0
～
S99999 and CNC output corresponding
codes with the spindle speed in the MDI operation. Two or three speed gear shifts (GR1, GR2 and
GR3) can be set by parameter No.246
～
248, and then the gear shift selection signal can be output at
the same time. When the gear shift selection signal changes, the SF signal is simultaneously output.
The meaning of the gear shift signal is shown below:
Table 8-1-2-1
the 2
nd
gear
the 3
rd
gear
Remark
GR1
Low
Low
Low: Low speed gear
GR2 High Middle
Middle:
intermediate speed gear
GR3
High
High: high speed gear
y
When the code voltage is 10V, spindle speed A at low speed shift (Parameter No246)
(min
-1
)
y
When the code voltage is 10V, spindle speed B at the high speed shift (Parameter
No.247) (min
-1
) (Medium speed gear at the 3
rd
gear).
y
When the code voltage is 10V, spindle speed C at the high speed shift (Parameter
No.248) (min
-1
) ( the 3
rd
gear).
S code command is performed with the spindle motor speed code voltage (0
～
10V) and
