MDS-C1-SPA Series INSTRUCTION MANUALib1500152(eng)a.pdf - 第166页
4. Spindle Adjustment 4 - 75 <0 → N3 → N1 → N3 → 0 changeover sequence> S peed command Motor rotation speed S tart signal (SRN or SRI) S peed detection signal (SD) Zero speed signal (ZS) L coil selection command si…
4. Spindle Adjustment
4 - 74
(Reference) The generation of the signals in item [1] and [2] are shown in the following flow chart.
START
ZS:ON ?
LCS:ON ?
SD:ON ?
LCS=ON
LCS=OFF
Speed
command
≦N2 ?
Speed
command
≦N2 ?
LCS=OFF
LCS=ON
Speed
command
≦N2 ?
SD:ON ?
Check TM timer
or coil changed
signal
SRN/SRI
:ON
Was speed
command changed?
NO
YES
YES
(Low-speed
coil range
command)
NO
(High-speed coil range command)
YES
(Low-speed
coil range)
NO
(High-speed
coil range)
NO
(High-speed
coil range)
YES
(Low-speed
coil range)
NO
YES
(Low-speed coil
range command)
NO
(High-speed coil selected)
YES
(Low-speed coil selected)
NO
YES
NO
YES
(Operation mode) [1] [2] - A [2] - B [2] - D[2] - C
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
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[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.