MDS-C1-SPA Series INSTRUCTION MANUALib1500152(eng)a.pdf - 第167页
4. Spindle Adjustment 4 - 76 [3] When the speed command is ch anged to N3 (high- speed coil range) at t6, the motor starts to decelerate toward N3. However, when changeov er speed N2 i s reached at t7, the speed detectio…
4. Spindle Adjustment
4 - 75
<0 → N3 → N1 → N3 → 0 changeover sequence>
Speed command
Motor rotation speed
Start signal
(SRN or SRI)
Speed detection signal
(SD)
Zero speed signal
(ZS)
L coil selection
command signal
(LCS)
L coil selected signal
(LCSA)
t1
N3
N1
N3
N2
N3
N1
N3
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
(Note)
High-speed coil selection Low-speed coil selection High-speed coil selection
t2
t3 t4 t5
t6 t7 t8
t9 t10
[1] When the speed command reaches N3 (high-speed coil range) at t1, the system confirms that
the zero speed signal (ZS) is ON, and then turns the L coil selection command signal (LCS)
OFF (high-speed coil selection). Then, t he start signal (SRN or SRI) is turned O N at t2, and the
motor accelerates.
[2] Next when the speed command is changed to N1 (low-speed coil range) at t3, the motor starts
decelerating toward N1. However, when it reaches the coil changeover speed N2 at t4, the
speed detection signal (SD) changes from OFF to ON. The system confirms that this speed
detection signal (SD) has turned ON, and then changes the L coil selection command signal
(LCS) from OFF (High-speed coil selection) to ON (low-speed coil selection). This changes the
coil, and when completed (t5), the motor continues to decelerate to N1.
4. Spindle Adjustment
4 - 76
[3] When the speed command is changed to N3 (high-speed coil range) at t6, the motor starts to
decelerate toward N3. However, when changeover speed N2 is reached at t7, the speed
detection signal (SD) changes fro m ON to OFF.
The system confirms that this speed detection signal (SD) is OFF, and then changes the L coil
selection command signal (LCS) from ON (low-speed coil selection) to OFF (high-speed coil
selection). The coil changeover is executed with this, and when completed (t6), the motor
continues to accelerate to N3.
[4] When the start signal (SRN or SRI) turns OFF at t9, the motor decelerates to a stop. The sp eed
detection signal will change from OFF to ON at t10, but this applies when stopping. Since the
speed command does not change, there is no need to change the L coil selection command
signal (LCS), and the motor will continue to decelerate to a stop with the high-speed coil.
(Note 1) The speed detection signal (SD) detection level is set with the parameters.
(Note 2) Turn the start signal ON after TM or longer has elapsed from the input of the L coil selection
command signal (LCS) or after the coil changed sig nal has changed fr om ON to OFF.
(4) Changing the coil in the speed control mode ⇔ position control mode
The position control mode refers to the mode where position loop control such as orientation
control and multi-point indexing orientati on control is carried out.
The following cautions must be observed when inputting the L coil selection command signal
(LCS) in the position control mode.
CAUTION
The L coil selection command signal (LCS) will not be accepted if input after
the position loop control has started.
• State with orient ation command (ORC) ON • • • For orientation control
In other words, position control will be executed with the same coil state as
that of when the position loop control was started. Conversely, when the
position loop control is canceled, the L coil selection signal (LCS) input will
be valid. If the coil state during position loop co ntrol execution an d the L coil
selection signal (LCS) in put af ter the p osition loop i s canceled differ, the coil
may be changed unintenti onally when the position loop control is canceled.
Thus, before st arting position loop control, select the required coil
beforehand (input the LCS signal). Then, start position loop control, and
hold the L coil selection signal (LCS).
t1 t2 t3
Orientation start signal
L coil selection
command signal
(LCS)
L coil selected signal
(LCSA)
ON
ON
ON
[Coil is not changed.]
[Coil is changed even if LCS does not change.]
[1] Each input signal must be input after the TM or longer time has elapsed from the input of the L
coil selection signal (LCS) and the coil selected signal (MKC) has changed from ON to OFF.
4. Spindle Adjustment
4 - 77
(1) Operation during orientation
[1] If the orientation command (ORC) is turned ON during spindle operation, orientation will be
completed with t he currently selected coil. (Same as conventional mechanical gears.)
[2] If orientation is to be carried out with the low-speed coil even when operating with the
high-speed coil as a means to increase the servo rigidity during orientation, use the following
procedure to orient with the low-speed coil without stopping the motor once from the
high-speed coil state.
(i) First turn the start signal (SRN o r SRI) OFF and decelerate the motor.
(ii) Using the speed detection sig nal (SD), change the L coil selection command signal (LCS)
from the high-speed coil to the low-spe ed coil.
(iii) After the TM or longer timing, or after the coil selected signal is turned ON and OFF, the
orientation command (ORC) is turned ON. Refer to the section (2)-3) for details on TＭ.
<Changing to the low-speed coil and orienting during operation with high-speed coil>
ON
ON
ON
ON
ON
T
M
Motor rotation speed
NC side orientation command
(Ex. M19)
Start signal
(SRN or SRI)
Speed detection signal
(SD)
L coil selection command signal
(LCS)
Orientation command signal
(ORC)
ON
Orientation complete signal
(ORCA)