MDS-C1-SPA Series INSTRUCTION MANUALib1500152(eng)a.pdf - 第161页
4. Spindle Adjustment 4 - 70 [Outline of operation] A coil of the motor is changed when using a coil changeover motor. Wh en changing the coil, change the contactor connected outside by turning L coil se lection signal O…
4. Spindle Adjustment
4 - 69
4-3-6 Adjusting coil changeover
(1) Necessary input/output
I/O Signal name I/O mode Mandatory/Optional
L coil selection command signal (LCS) General-purpose input
Input
Forward run signal (SRN), reverse run signal (SRI) Dedicated input
L coil selected signal (LCSA) General-purpose output
Output
Changing coil signal (MKC) General-purpose output
: Mandatory : Optional
(2) Operation sequence
L coil select ion c ommand
signal (LCS)
L coil select ed s i gnal (LCS A )
ON
ON
OFF
OFF OFF
OFF
ON
OFF
Base cutoff hold
Changing coil signal (MKC)
Forward run (SRN), reverse run (S RI ) s i gnal
Base ON
Motor const ant s changeover
(parameter)
Output current waveform (approx.)
ON
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
High-speed coil
Low-speed coil High-speed coil
T1
T1
T1: Base cutoff hold time (SP059 Standard setting:150ms)
4. Spindle Adjustment
4 - 70
[Outline of operation]
A coil of the motor is changed when using a coil changeover motor. When changing the coil, change
the contactor connected outside by turning L coil selection signal ON/OFF during motor operation or
motor stop.
CAUTION
1. The motor will be in an uncontrolled state after the L-coil selection signal
has turned ON/OFF until the coil is fully changed over. Thus, when
changing coils during heavily cutting operations, the motor speed may be
dropped significantly, or the motor may be stopped. When cutting surface
precision is required, do not perform coil changeove r or avoid cutting du ring
rotation in this period.
2. In T
1
(During base shut-off time) in the figure of the previous page, the
spindle drive unit does not accept any input signal (forward run start
command, reverse run start command, orientation start command). Thus,
input those signals to the spindle drive unit, having TM(=T
1
+50ms) or more
timer secured after the L coil sele ction command signal (LCS) has been
changed as shown in the drawing below.
Instead of using a timer, those signals can be input after the "cha nging coil"
signal (MKC) is turned ON from OFF.
3. Base shut-off time T
1
is determined with the parameter SP059 (MKT)
setting value. In connection with the contacto r operation, the st andard value
will be 150ms. Thus, TM usually has to be set to 200ms or more.
[1] Using a timer
L coil selection command
signal (LCS)
T
M
Coil changeover timer
Each input signal
T
M
≧200ms
[2] Using the "changing coil" signal (valid only when MDS-B-SPA is used)
L coil selection command
signal (LCS)
T
1
Changing coil signal
(MKC)
Each input signal
4. Spindle Adjustment
4 - 71
(3) Changing the coil in the speed control mode
When the motor's output characteristics listed on the Mitsubishi motor rating table are as follows,
N2 is the coil changeover speed, and the following expression is established.
0≤N≤N2 is the low-speed coil usage range
N2<N is the high-speed coi l usage range
The method for inputting the L coil selection signal (LCS) to change from the low-speed coil range
N1 to the high-speed coil range speed N3 (vice versa) is explained in this section.
N1
N2 N3
Changeover
speed
High-speed coi l rangeLow-speed coil range
Speed N
Output
0