Vexta PMC Series User manual

1
HP-7420-4
Table of Contents
Safety precautions................................. Page 2
Product verification ................................ Page 5
Names and function of driver parts ....... Page 7
Installation.............................................. Page 9
Driver function swithces ........................ Page 15
Input/output signals ............................... Page 16
Connections........................................... Page 22
Motor current adjustment ...................... Page 24
Troubleshooting..................................... Page 27
Specifications......................................... Page 30
Installing and wiring in compliance........ Page 33
with EMC directive
PMC Series
Compact & Lightweight Stepping Motor and Driver Package
OPERATING MANUAL
Thank you for purchasing an Oriental Motor product.
This Operating Manual describes product handling procedures and safety precautions.
• Please read it thoroughly to ensure safe operation.
• Always keep the manual where it is readily available.
• Standard Type
•MG Geared Type
• Harmonic Geared Type

2
Safety precautions
Only qualified personnel should work with the product.
Use the product correctly after thoroughly reading the section “Safety precautions.”
The precautions described below are intended to prevent danger or injury to the user and
other personnel through safe, correct use of the product. Use the product only after
carefully reading and fully understanding these instructions.
Warning
Handling the product without observing the instructions that accompany a “Warning”
symbol may result in serious injury or death.
Caution
Handling the product without observing the instructions that accompany a “Caution”
symbol may result in injury or property damage.
Note
The items under this heading contain important handling instructions that the user should
observe to ensure safe use of the product.
Warning
General
• Do not use the product in explosive or corrosive environments, in the presence of
flammable gases, locations subjected to splashing water, or near combustibles. Doing
so may result in fire or injury.
• Assign qualified personnel the task of installing, wiring, operating/controlling, inspecting
and troubleshooting the product. Failure to do so may result in fire or injury.
Installation
• Install the motor and driver in their enclosures in order to prevent injury.
Connection
• Keep the driver’s input-power voltage within the specified range to avoid fire.
• The driver power supply to be used should be a DC power supply where the primary
and secondary sides are provided with reinforced insulation. Otherwise, an electric
shock may occur.
• Connect the cables securely according to the wiring diagram in order to prevent fire.
• Do not forcibly bend, pull or pinch the cable. Doing so may fire.

3
Operation
• Turn off the driver power in the event of a power failure, or the motor may suddenly start
when the power is restored and may cause injury or damage to equipment.
• When you want to use the motor in a vertical application, take position holding
measures. When the power is turned off, the motor will lose the holding brake force.
The movable part will drop and possibly cause injury to personal and damage to the
equipment.
• Do not turn the output current off input to “ON” while the motor is operating. The motor
will stop and lose its holding ability, which may result in injury or damage to equipment.
Repair, disassembly and modification
• Do not disassemble or modify the motor or driver. This may cause injury. Refer all such
internal inspections and repairs to the branch or sales office from which you purchased
the product.
Caution
General
• Do not use the motor and driver beyond their specifications, or injury or damage to
equipment may result.
• Do not touch the motor or driver during operation or immediately after stopping. The
surfaces are hot and may cause a burn.
Transportation
• Do not hold the motor output shaft or motor cable. This may cause injury.
Installation
• Keep the area around the motor and driver free of combustible materials in order to
prevent fire or a burn.
• To prevent the risk of damage to equipment, leave nothing around the motor and driver
that would obstruct ventilation.
• The motor and driver should be firmly secured on the metallic plate in order to prevent
personal injury or equipment damage.
• Provide a cover over the rotating parts (output shaft) of the motor to prevent injury.

4
Operation
• Use a motor and driver only in the specified combination. An incorrect combination may
cause a fire.
• To avoid injury, remain alert during operation so that the motor can be stopped
immediately in an emergency.
• Before supplying power to the driver, turn all control inputs to the driver to “OFF.”
Otherwise, the motor may start suddenly and cause injury or damage to equipment.
• Make sure that the output power off input of the driver is turned on if you want to move
the motor shaft directly (e.g. for manual positioning). This caution is to prevent
personal injury.
• When an abnormality is noted, stop the operation immediately, or fire or injury may
occur.
Disposal
• When disposing of the motor or driver, treat them as ordinary industrial waste.
Note
Before using the product, read the content of the label carefully.
The content and stick position of the label are as follows.
Please pay attention to the following
to the product work in the best
condition.
●Do not take the product out of the
protective bag until ready to use it.
●Do not touch parts and contacts to
avoid electrostatic damage.
●Do not expose the product to
vibration or shock.
●Keep the product away from dusty
and humid condition. MNX7227
Driver
Protective bag
ATTENTION

5
Product verification
Equipment checklist
• Motor........................................................................ 1
• Driver ....................................................................... 1
• M2.5 Cross recessed head machine screws
with washer for mounting the motor
(for only MG geared type)........................................ 4
• Connector for signals
6-173977-4 (AMP), 6-173977-8 (AMP).................... 2
• Connector for power supply
6-173977-3 (AMP) ................................................... 1
• Connector for motor connection
6-173977-5 (AMP) ................................................... 1
• Operating manual .................................................... 1
Note
Do not take the product out of the protective bag until ready to use it. Otherwise, the driver
may be damage.
Model numbers and motor/driver combinations
The PMC series is a combined package which includes a stepping motor and driver.
This operating manual is designated for the following products.
Package model number
PMC33A3
PMC33B3
PMC35A3
PMC35B3
PMC33A1-MG∗1
PMC33B1-MG∗1
PMC33A1-HG∗2
PMC33B1-HG∗2
Driver model number
PMD03CA
Motor model number
PMM33A2
PMM33B2
PMM35A2
PMM35B2
PMM33A-MG∗1
PMM33B-MG∗1
PMM33A-HG∗2
PMM33B-HG∗2
The box (∗1) represents the desired gear ratio (3.6, 7.2, 10, 20, 30, 50).
The box (∗2) represents the desired gear ratio (50, 100).
Note
The motor and the driver are precision equipment and should not be dropped or subject to
any physical shocks.

6
Interpreting the model number
Reference number
Shaft type
A：Single shaft
B：Double shaft
Motor case length
3：31mm (1.22in.)
5：50.5mm (1.99in.)
Motor frame size
3：28mm (1.1in.) sq.
Compact & lightweight stepping motor and driver package
PMC series
P M C 3 3 A 3P M C 3 3 A 3
P M C 3 3 A 3P M C 3 3 A 3
P M C 3 3 A 3
P M C 3 3 A 1 - M G 3.6P M C 3 3 A 1 - M G 3.6
P M C 3 3 A 1 - M G 3.6P M C 3 3 A 1 - M G 3.6
P M C 3 3 A 1 - M G 3.6
Gear ratio
MG geared type
3.6: 3.6:1 20 : 20:1
7.2: 7.2:1 30 : 30:1
10 : 10:1 50 : 50:1
Harmonic geared type
50 : 50:1 100 : 100:1
Shaft type
A：Single shaft
B：Double shaft
Motor case length
Motor frame size
3：28mm (1.1in.) sq.
Compact & lightweight stepping motor and driver package
PMC series
Geared type
MG :MG gear
HG : Harmonic gear
Reference number

7
Names and functions of driver parts
Illustration shows the view from the connector side.
LED indications
GND
POWER
RUN
STOP
FH
2P 1P
+
+
+
+
+
+
+
ORG
RED
TIM
BLU
GRN
BLK
24 / 36V
NC
SIGNAL 1
SIGNAL 2
MOTOR
POWER
1
1
1CN1CN4CN3
1
CN2
C.UP
F/H
C.OFF
CCW/D.
CW/P.
VEXTA STEPPING DRIVER
⑦

①
⑨

⑧

②
③
④
⑤
⑥


Potentiometers and switches
Indication
②RUN
③STOP
④F/H
⑤2P/1P
Run potentiometer
Stop potentiometer
Step angle switch
Pulse input mode
switch
0.35A/phase
0.175A/phase
F
1P
Name Factory
setting
Current adjustment potentiometer used
when motor is running.
Motor standstill current adjustment
potentiometer used when current has
been cut back by the automatic current
cutback function when there is no pulse
input (motor standstill).
The motor step angle can be set to full
step or half step with this switch.
The pulse signal input mode can be set
to 1-pulse input mode or 2-pulse input
mode this switch.
Function
Page25
Page25, 26
Page15
Page15
Page
reference
Indication
①POWER Power input LED Green
LED name Color
Lights when the power is input.
Conditions when LED ON

8
Terminals
Indication Terminal name Function
Pin
No.
Page
reference
Page16, 17
Page16, 17
Page18, 19
Page19
Page20
Page21
Page22, 23
Page22, 23
Page22, 23
Page22, 23
Page22, 23
Page22
The pulse mode signal is input to this
terminal. The direction of the motor’s
rotation is determined by the following
rotation direction input terminal.
(When in 2-pulse input mode the CW
direction command pulse signal is input
to this terminal.)
The rotation direction signal is input to
this terminal. When a signal is input to
the terminal the motor output shaft will
rotate the counterclockwise direction.
(When in 2-pulse input mode the CCW
direction command pulse signal is input
to this terminal.)
The all windings off signal is input to this
terminal.
When a signal is input to the terminal the
driver will cut the power supply to the
motor.
The motor torque will then be reduced to
zero and the motor shaft can be rotated
freely for adjustment.
This function is used when manual
positioning etc. is required.
The motor step angle is input to this
terminal.
The automatic current cutback release
signal is input to this terminal.
Signal for deactivating the automatic
current cutback function, which cuts back
the output current to the motor when it is
standstill.
Signal indicating that the motor excitation
sequence is at step “0”.
Connect this terminal to the blue lead wire.
Connect this terminal to the red lead wire.
Connect this terminal to the orange lead wire.
Connect this terminal to the green lead wire.
Connect this terminal to the black lead wire.
Connect this terminal to a “+” side of
DC24V or DC36V and GND.
No connection.
⑥SIGNAL 1
6-173977-8
(AMP)
∗1
The selection of
the pulse signal
input mode can
be set with the
pulse input
mode switch.
∗2
In this table, the
rotation direction
shows that of
motor output
shaft.
For harmonic
geared type and
gear ratio 10:1 of
MG geared type,
the motor rotation
direction is
opposite to the
output shaft
rotation direction.
⑦SIGNAL 2
6-173977-4
(AMP)
⑧MOTOR
6-173977-5
(AMP)
⑨POWER
6-173977-3
(AMP)
1
2
3
4
5
6
7
8
1
2
3
4
1
2
3
4
5
1
2
3
(Pulse/CW Pulse
Signal Input
Terminal)
(Pulse/CW Pulse
Signal Input
Terminal)
(Rotation Direction/
CCW Pulse Signal
Input Terminal)
(Rotation Direction/
CCW Pulse Signal
Input Terminal)
(All Windings Off
Signal Input
Terminal)
(All Windings Off
Signal Input
Terminal)
Motor Connection Terminal
24/36V
GND
NC
(Step Angle Signal Input Terminal)
(Step Angle Signal Input Terminal)
(Automatic Current
Cutback Release
Signal Input Terminal)
(Automatic Current
Cutback Release
Signal Input Terminal)
(Excitation Timing
Signal Output Terminal)
(Excitation Timing
Signal Output Terminal)
(Power Supply
Connection Terminal)
(Power Supply
Connection Terminal)
CW/P.+
CW/P. -
CCW/D.+
CCW/D.
-
C.OFF+
C.OFF
-
F/H+
F/H
-
C.UP+
C.UP
-
TIM+
TIM -

9
PMC3A(B)3
M2.5
Spring washer
M2.5
Recessed cross
head screws Mounting plate
Ø3(.12)-4holes
Spot facing or
through hole for pilot 4-M2.5 P0.45
Installation
Motor installation


Motor installation location
To prevent motor damage, install in a location with the following conditions.
• Indoors (The motor is designed and manufactured to be used as an internal component
within other equipment.)
• Ambient temperature range
- 10°C~+50°C (+14°F~+122°F) (non-freezing)
For harmonic geared type: 0°C~+40°C (+32°F~+104°F) (non-freezing)
• Ambient humidity below 85% (non-condensing)
• No explosive, combustible, or corrosive gases
• No direct sunlight
• No dust or conductive particles (i.e. metal chips or shavings, pins, or wire fragments
etc.)
• No water, oil, or other fluids
• Where the motor is able to dissipate heat easily
• No continuous vibration or sudden shocks
• No nearby radiation, magnetic field, or air vacuum environment


How to install the motor
To allow for heat dissipation and to prevent vibration, be sure to securely attach the motor
to solid metal surface.
The motor flange incorporates a pilot diameter. Use this pilot diameter as a guide for
alignment when mounting the motor.

10
PMC33A(B)1-MG
PMC33A(B)1-HG
M3
Spring washer
M3
Hexagonal
socket screws Mounting plate
4-M3 P0.5
Ø3.5(.14)-4holes
Spot facing or
through hole for pilot
The following hardware (not supplied) is needed to mount the motor.
For the installation of the MG geared type, use the supplied screws.
Select screws with a length appropriate for the thickness of the mounting plate.
(Refer to the below table.)
M2.5
Cross recessed
head machine
screws with
washer (attached)
Mounting plate
Ø3(.12)-4holes
Spot facing or
through hole for pilot 4-M2.5 P0.45
PMC3A(B)3
PMC33A(B)1-HG
・M2.5 Recessed cross head screws : 4
・M2.5 Spring washers : 4
・M3 Hexagonal socket screws : 4
・M3 Spring washers : 4
Length of the screws [Unit: mm (inch)]
thickness of the mounting plate +2.5 (0.1)
thickness of the mounting plate +3.5 (0.14)
thickness of the mounting plate +5 (0.2)
Model
PMC33A(B)3
PMC35A(B)3
PMC33A(B)1-MG
PMC33A(B)1-HG

11
PMC33A(B)1-MG
PMC33A(B)1-HG
Spot facing or
through hole for pilot
23±0.2(.9±.008)
23±0.2(.9±.008)
Ø3(.12)-4holes
Ø5.5(.22)min.
Shaft hole
X
X’
R0.3(.01)max.
2(.08)min.
X-X’
1.5(.059)min.
Ø22
+0.033
0
.87
+.0013
0
()
Ø22
+0.033 0
.87
+.0013
0
()
X
X-X’
Ø11.5(.45)
Spot facing or
through hole for pilot
23±0.2(.9±.008) 6±0.2(.2±.008)
23±0.2(.9±.008)
Ø3(.12)-4holes
Ø5.5(.22)min.
Shaft hole
X’
R0.5(.02)max.
Ø11.5(.45)
2(.08)min.
2(.08)min.
Spot facing or
through hole for pilot
23±0.2(.9±.008)
23±0.2(.9±.008)
Ø3.5(.14)-4holes
Ø8.5(.33)min.
Shaft hole
X
X’
R0.3(.01)max.
5(.2)min.
X-X’
2(.08)min.
Ø22
+0.033
0
.87
+.0013
0
()
Ø22
+0.033 0
.87
+.0013
0
()


Motor mounting plate dimensions
［unit: mm (inch)］
PMC3A(B)3

12
Permissible thrust load [Unit: N (lb.)]
The box (∗1) represents the desired gear ratio (3.6, 7.2, 10, 20, 30, 50).
The box (∗2) represents the desired gear ratio (50, 100).


Connecting the motor to the drive mechanism (Load)
Proper alignment is necessary when
connecting the drive mechanism (load) to
the motor shaft. Use a flexible coupling.
Distance from the end
of the shaft ［mm (inch)］
PMC3

A(B)3
PMC33A(B)1-MG

∗1
PMC33A(B)1-HG

∗2
0
25 (5.51)
9.2 (2.02)
140 (30.8)
15 (0.59)
21.9 (4.82)
240 (52.8)
5 (0.2)
34 (7.49)
11.4 (2.51)
160 (35.2)
10 (0.39)
52 (11.4)
15 (3.3)
200 (44.1)
Note
• Inadequate alignment may reduce the life span of the motor bearings or damage the
motor shaft.
• Exceeding the permissible overhung load or permissible thrust load will damage or shorten
the life span of the bearings and motor shaft.
Do not exceed the permissible overhung load and thrust load as indicated in the
following chart.
• For geared motor, do not separate the motor and the gearhead.
Permissible overhung load [Unit: N (lb.)]
Ball screw Coupling Stepping motor
PMC33A(B)3
PMC35A(B)3
PMC33A(B)1-MG

∗1
PMC33A(B)1-HG

∗2
1 (0.22)
1.7 (0.374)
10 (2.2)
100 (22)

13
Driver installation


Driver installation location
To prevent driver damage, install in a location with the following conditions.
• Indoors (The driver is designed and manufactured to be used as an internal component
within other equipment.)
Ambient temperature range 0°C~+40°C (+32°F~+104°F) (non-freezing).
Install a forced-air cooling fan if ambient temperatures exceed +40°C (+104°F).
• Ambient humidity below 85%(non-condensing)
• No explosive, combustible, on corrosive gases
• No direct sunlight
• No dust or conductive particles (i.e. metal chips or shavings, pins, or wire fragments
etc.)
• No water, oil, or other fluids
• Where the driver is able to dissipate heat easily
• No continuous vibration or sudden shocks
• No nearby radiation, magnetic field, or air vacuum environment
• If the driver is installed in a switch box or other enclosed area, and near a heat source,
be sure to establish ventilation holes. The heat generated by the driver will cause the
ambient temperature to rise which could consequently damage the driver.
• If the driver is installed near a source of vibration, and this vibration is transmitted to the
driver, attach a shock absorber to prevent driver damage.
• If the driver is installed near a source of noise interference (i.e. high frequency welding
machine, electromagnetic switch, etc.) install a noise filter, or connect it to a separate
power source to reduce the effect of the interference, otherwise the motor may not
operate correctly.
• Leave a space of at least 25mm (1in.). If using more than one driver, leave a space of at
least 20mm (0.8in.) between each driver. Driver heat generation will cause the ambient
temperature to rise, and if the permissible ambient operating temperature is exceeded,
driver damage may result.


How to install the driver
The driver is designed to cool naturally by convection.
Secure the driver to a metal plate made of steel, aluminium or other material having good
thermal conductivity.
The following hardware (not supplied) is needed to mount the driver.
• M3 Screws :4
• M3 Spring washers :4
• Insulation type spacers :4
• M3 Nuts :4

14


Driver mounting plate dimensions
Horizontal mounting Vertical mounting
Connector
Securing the driver
1. Insert spring washers and M3 screws from the surface of the connector side of the
circuit board.
2. Insert the spacer between the driver and the mounting plate, and secure by using M3
nuts.
• Spacer size: Ø9mm (0.35in.) max. 6mm (0.24in.) min. long
• Screw tightening torque: 0.5N·m (71oz-in)
[Unit: mm (inch)]
72(2.83)
66±0.3(2.6±.01)
50±0.3(1.97±.01)
3(.12)
3(.12) Ø3.2(.13)-4holes
56(2.2)
6(.24)min.
M3 Screw
M3 Spring washer
Driver
M3 nut
Chassis
Insulation
type spacer

15
Pulse input mode switch (Factory setting : 1P)
Select the appropriate pulse input mode to correspond to
your controller with this switch.
When the switch is set to the 1P position, 1-pulse input
mode is established and motor rotation is controlled by
pulse signals and rotation direction signals.
When the pulse input mode switch is set to the 2P position,
2-pulse input mode is established and motor rotation is
controlled by CW and CCW pulse signals.
When the switch is set to:
“F” (Full step)
Standard type: 1step = 0.72° (1 rotation = 500 pulses)
Geared type: 1step= 0.72°×
(1 rotation = 500×gear ratio pulses)
Driver function switches
The driver has various operation functions which are set with the function switches.
FH
2P 1P
OFF ON
ON
12
Step angle switch
Pulse input mode switch
∗The white square section of the function switch represents the switch lever.
Step angle switch (Factory setting : F)
2P 1P
ON
12
FH
ON
12
“H” (Half step)
Standard type: 1step = 0.36° (1 rotation = 1000 pulses)
Geared type: 1step = 0.36°×
(1 rotation =1000×gear ratio pulses)
1
gear ratio
1
gear ratio

16
1-Pulse input mode
Pulse signal
When the photocoupler state changes from “ON” to “OFF”, the motor rotates one step.
The direction of rotation is determined by the following rotation direction signals.
Rotation direction signal
The rotation direction signal is input to rotation direction/CCW pulse signal input terminal.
An input signal at “photocoupler ON” commands a clockwise direction rotation.
(For harmonic geared type and gear ratio 10:1 of MG geared type: counterclockwise)
An input signal at “photocoupler OFF” commands a counterclockwise direction rotation.
(For harmonic geared type and gear ratio 10:1 of MG geared type: clockwise)
2-Pulse input mode
CW∗pulse signal
When the photocoupler state changes from “ON” to “OFF”, the motor rotates one step in
the clockwise direction.
(For harmonic geared type and gear ratio 10:1 of MG geared type: counterclockwise)
CCW∗pulse signal
When the photocoupler state changes from “ON” to “OFF”, the motor rotates one step in
the counterclockwise direction.
(For harmonic geared type and gear ratio 10:1 of MG geared type: clockwise)
∗CW and CCW refer to clockwise and counterclockwise directions respectively, from a
reference point of facing the motor output shaft.
V
0
R
R
Pulse(CW)
Rotation direction(CCW)
220Ω
220Ω
20mA max.
20mA max.
Controller output Driver input
(Internal circuit)
Open collector
output CW/P.
CCW/D.
PLS(CW)
DIR.(CCW)
＋
＋
‑
‑
2
1
3
4
The number within refers to the pin
number of driver connector SIGNAL 1.
The information in the brackets ( ) refers to
signals when in 2-pulse input mode.
Keep the voltage between DC5V and DC24V.
When voltage is equal to DC5V, external
resistance R is not necessary.
When voltage is above DC5V, connect
external resistance R and keep the input
current below 20mA.
Input/output signals
Input signals
The input signals to the driver and their functions are specified below.


Pulse/CW pulse signals
Rotation direction/CCW pulse signals
The diagram below shows the input circuits and an example connection to a controller.

17
Pulse signal
5µs
min.
2µs
max.
90%
10%
Rotation direction signal
10 µsmin.
5µs
min.
2µs
max.
10 µsmin.
Photocoupler ON
Photocoupler ON
Photocoupler OFF
Photocoupler OFF
2-Pulse input mode
Relation to the pulse input mode switch
When the switch is set to the 1P position, motor rotation is controlled by pulse signals and
rotation direction signals.
When the switch is set to the 2P position, motor rotation is controlled by CW pulse signals
and CCW pulse signals.
Pulse waveform characteristics
1-Pulse input mode
Photocoupler ON CW pulse signal
5µs
min. 5µs
min.
2µs
max.
90%
10%
CCW pulse signal
10 µsmin.
2µs
max.
Photocoupler ON
Photocoupler OFF
Photocoupler OFF
• The shaded area indicates when the photocoupler diode is ON. The motor moves when
the photocoupler states changes from ON to OFF as indicated by the arrow.
• The pulse voltage is 4~5V in the “photocoupler ON” state, and 0~0.5V in the
“photocoupler OFF” state.
• Input pulse signals should have a pulse width over 5µs, pulse rise/fall below 2µs, and
a pulse duty below 50%.
• Keep the pulse signal in the “photocoupler OFF” state when no pulse is being input.
• The minimum interval time when changing rotation directions is 10µs.
• In 1-pulse input mode, leave the pulse signal at rest “photocoupler OFF” when
changing rotation directions.
• In 2-pulse input mode, do not input CW and CCW pulse signals at the same time.
Inputting a pulse signal while the other pulse signal is already in the “photocoupler
ON” state will result in erratic motor rotation.

18


All windings off signal
The diagram below shows the input circuit and an example connection to a controller.
The number within refers to the pin
number of driver connector SIGNAL 1.
Keep the voltage between DC5V and DC24V.
When voltage is equal to DC5V, external
resistance R is not necessary.
When voltage is above DC5V, connect
external resistance R, and keep the input
current below 20mA.
R
＋220Ω
20mA max.
Controller output
Open collector
output
‑
Driver input
(Internal circuit)
C.OFF C.OFF
5
6
V
0
When the all windings off signal is in the “photocoupler ON” state, the current to the motor
is cut off and motor torque is reduced to zero. The motor output shaft can then be rotated
freely by hand.
When the all windings off signal is in the “photocoupler OFF” state, the motor holding
torque is proportional to the current set by the current adjustment rotary switches. During
motor operation be sure to keep the signal in the “photocoupler OFF” state.
This signal is used when moving the motor by external force or manual home positioning
etc. is desired. If this function is not needed, it is not necessary to connect this terminal.
Switching the all windings off signal from “photocoupler ON” to “photocoupler OFF” does
not alter the excitation sequence.
When the motor shaft is manually adjusted with the all windings off signal input, the shaft
will shift up to ±3.6°
(geared type: ±3.6°/gear ratio) from the position set after the all windings off signal is
released.

19
Manual detection of the home position
Input the all windings off signal, set the motor to the desired position, then release the all
windings off signal.
The number within refers to the pin
number of driver connector SIGNAL 1.
Keep the voltage between DC5V and DC24V.
When voltage is equal to DC5V, external
resistance R is not necessary.
When voltage is above DC5V, connect
external resistance R, and keep the input
current below 20mA.
Half Step
Standard type:
When the step angle signal is in the
“photocoupler ON” state, it is set to half-step
mode (0.36°/step, 1 rotation 1000 pulses)
Geared type:
When the step angle signal is in the
“photocoupler ON” state, it is set to half-step
mode
(0.36°× / step,
1 rotation 1000×gear ratio pulses)
Full Step
Standard type:
When the step angle signal is in the
“photocoupler OFF” state, it is set to full-
step mode (0.72°/step, 1 rotation 500
pulses)
Geared type:
When the step angle signal is in the
“photocoupler OFF” state, it is set to full-
step mode
(0.72°× / step,
1 rotation 500×gear ratio pulses)
Note
When the step angle signal is used, the switch must be set to the F position.
1
gear ratio
1
gear ratio
R
＋220Ω
20mA max.
Controller output
Open collector
output
‑
Driver input
(Internal circuit)
F / H F / H
7
8
V
0
All windings off signal input
Home position
set
All windings off
signal input
All windings off
signal release
Photocoupler ON
Photocoupler OFF OFF OFF
ON
Note
For geared type, do not do manual detection of the home position. It may cause damage
the gearhead and may cause the following problems.
• The motor makes a strange noise.
• The motor does not rotates correctly.


Step angle signal
The diagram below shows the input circuit and an example connection to a controller.

20


Automatic current cutback release signal
The diagram below shows the input circuit and an example connection to a controller.
The number within refers to the pin
number of driver connector SIGNAL 2.
Keep the voltage between DC5V and DC24V.
When voltage is equal to DC5V, external
resistance R is not necessary.
When voltage is above DC5V, connect
external resistance R, and keep the input
current below 20mA.
R
＋220Ω
20mA max.
Controller output
Open collector
output
‑
Driver input
(Internal circuit)
C.UP C.UP
1
2
V0
• When the automatic current cutback release signal is in the “photocoupler OFF” state,
the automatic current cutback function is activated; 0.1s. after the pulse is stopped the
motor output current is automatically cut back, reducing motor and driver heat.
(The factory setting for the current cutback is 50%. In order to change this, refer to the
instructions for adjusting the current at motor standstill on pages 25, 26)
• When the maximum holding torque is needed, input “photocoupler ON” signal. The
automatic current cutback function is deactivated.
• When the automatic current cutback release signal is in the “photocoupler ON” state,
the automatic current cutback function is deactivated.
• Because the motor’s holding power is proportional to the motor output current, the motor’s
holding power is reduced when the current is cut back. (The motor has holding power
proportional to the current at motor standstill, which is set with the STOP potentiometer.
Refer to page 24.)
Note
Generally, automatic current cutback release signal should be set to “photocoupler OFF”
to suppress heat generation in the motor and driver.