
B–62073E–1/04 2. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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(2) Sample sequence when the spindle orientation with the stop position set externally function is executed
Stop 3
Spindle orientation command
ORCMA
Position command
SHA00-1
Stop position change command
INDXA
Rotational command at
stop position changing A
Short path command at
stop position changing of
setting stop position exterĆ
nally. A
Motor speed
Spindle orientation completion signal
ORARA
*1 = Should be at least 50 msec
*1 *1 *1 *1 *1 *1
*1 *1
Stop 1 Stop 2
Spindle
stop
ROTA
NRRO
Clockwise
Counter-clockwise
(Note 2)
(Note 2)
(Note 1)
Stop (1)
⋅ A normal orientation command stops the spindle at the predetermined position.
⋅ The direction of rotation of the spindle motor is determined by the parameter.
⋅ When the function is executed for the first time after the power is turned on, the spindle rotates
at the orientation speed. The spindle stops at the predetermined position after the single rotation
signal is detected. When the function is executed for the second time or later, the spindle stops
at the predetermined position before it is rotated once.
⋅ If the data of the signal for specifying a stop position in spindle orientation, SHA00 to SHA11, has
already been set when the spindle orientation with the stop position set externally function is used
for the second time or later, the spindle is shifted by the angular displacement specified by the data
of the stop position detected at the rising edge of ORCMA. Then the spindle stops at the predeter-
mined position.
Stop (2), (3)
⋅ The spindle orientation with the stop position set externally function stops the spindle at the pre
determined position.
⋅ The direction of rotation of the spindle motor depends on ROTAA and NRROA.
NOTE 1 INDXA is valid only when ORCMA is set high.
NOTE 2 The machine tool builder can specify the signal as required.
Other notes:
1. If the spindle orientation function is started by ORCMA while the spindle is rotating, the forward spindle rotation
signal, SFRA, and the reverse spindle rotation signal, SRVA, must be set to zero for the sake of safety.
2. ORCMA must be set to zero by the tool change completion signal or the workpiece load/unload completion
signal that is provided by the machine tool builder.
3. Before the power is turned on ORCMA must be set to zero.
4. If the emergency stop function is executed while the spindle orientation is in progress, ORCMA must be
reset to zero.