
7. SIGNALS(CNC↔PMC)
7.1. INPUT SIGNALS(PMC→CNC)
15i 16i
#7 #6 #5 #4 #3 #2 #1 #0
1st SP G227 G070
ORCMA CTH1A CTH2A
2nd SP G235 G074
ORCMB CTH1B CTH2B
7.1.1. Orientation Command (ORCMA)
(i) This command signal is used to stop spindle movement at the preset position to allow tool change
and workpiece loading/unloading.
(ii) When this signal is specified as ”1” while the spindle is rotating, the rotation decelerates
immediately and the spindle stops at the preset position.
(iii) When the orientation command is issued, set the spindle forward/reverse rotation command (SFRA,
SRVA) to ”0” for safety. By means of this, the spindle will not start to rotate even in the unlikely
event ORCMA becomes ”0” during tool change.
(iv)Set this signal to ”0” by the tool change completion signal or workpiece loading/unloading
completion signal.
(v) Always set the orientation command signal to ”0” when turning on power.
(vi) When an emergency stop occurs during orientation, the orientation command signal must be reset
(”0”).
Return the ATC arm to the safe position so that it will not be damaged if the spindle or tool rotates
when the power is turned on.
7.1.2. Clutch/gear signals (CTH1A, CTH2A)
(i) When there are two or more speed change gear stages between the spindle and spindle motor,
these signals are used to select a spindle control parameter (position gain, gear ratio, velocity loop
gain).
(ii) Depending on the clutch or gear state, make settings according to the table below. Names such as
HIGH GEAR are assigned only for convenience. Arbitrary names may be assigned to the actual
gears.
CTH1A CTH2A
0 0 HIGH GEAR
0 1 MEDIUM HIGH GEAR
1 0 MEDIUM LOW GEAR
1 1 LOW GEAR
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DESCRIPTION DESIGN DATE
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αi series Spindle Amplifier Module
Magnetic Sensor Method
Orientation Descriptions
B-65282EN/05-01