GSK 218M, Connection And Plc Manual

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GSK218M CNC System Connection and PLC Manual
114
9.1.2 Analog spindle
General
The analog spindle is defined that the spindle speed is controlled by the analog
voltage value from CNC. So, CNC changes S code into the analog voltage value to
output to the spindle of machine tool to control the spindle speed.
1. The actual output analog voltage value equals to the S value controlled by the
spindle multiplying the spindle override.
2. CNC still reports the speed by S00~S31 signal but SF signal does not output.
Signal Spindle positive override signal （
G22#5
）
Spindle negative override signal
（
G22#3
）
Spindle override cancel signal OVC （
G22#4
）
［
Classfication
］
Input signal
［ Function ］ The signal specifies the S override change controlled by spindle.
Note: The spindle override function is invalid as follows:
Tapping cycle
Thread cutting
Gear change process:
Although S instructions the spindle speed, the actual is to control the spindle motor.
So, CNC needs to confirm the corresponding relation between the spindle motor and
gear. Like S instruction selection
， CNC selects the gear according to the previously
defined gear speed range by parameter to report PMC to select the corresponding
the gear by using the gear change select signal (GR3, GR2, GR1). At the same time,
CNC outputs the spindle motor speed according to the selected gear. CNC outputs
the instruction correspoinded to the spindle (GR1, GR2, GR3 output) speed by
specifying S0
～ S99999 during MDI mode. 2 or 3 speed gear (GR1, GR2, GR3) is set
by No.246 ～ 248 to simultaneously output to the gear select signal. When the gear
select signal is changed, CNC simultaneously output SF signal).
Specification of gear change signal is as follows:
No. 2 gear No. 3 gear Remark
GR1 Low Low Low: low gear
GR2 High Medium Medium: middle gear
GR3 High High: high gear
When the instruction voltage is 10V, the low gear spindle speed is A (parameter No.246)
（ min
-1
） .
When the instruction voltage is 10V, the high gear spindle speed is B (parameter No.247) （ min
-1
(middle gear during 3
rd
gear) .
When the instruction voltage is 10V, the high gear spindle speed is Ac (parameter No.248) （ 3
rd
gear ） .