SANKI S-CON MINI-Z Series Service manual

1
S-CON®MINI-Z Series
OPERATING AND SERVICE MANUAL

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Thank you very much for purchasing our S-CON ⓇMINI series. To use the
machine properly, please read this operating and service manual carefully before
use. Keep the manual where the machine is installed, so that it may be referred
to when needed.
TABLE OF CONTENTS
1．Caution When Handling .............................................................
2．Component Names .........................................................................
3．Assembly ..................................................................................................
4．Running the Conveyor ..................................................................
5．Taking up the Belt ............................................................................
6．Belt Alignment Adjustment .......................................................
7．Pulley Removal .....................................................................................
8．Belt Replacement ...............................................................................
9．Motor Replacement ..........................................................................
10．Drive Unit Relocation ........................................................................
11．Roller-edge/Knife-edge Models ...............................................
12．Telescopic Model...................................................................................
13．Tilt Models .................................................................................................
14．Inspection and Maintenance ......................................................
4
7
8
14
20
21
24
25
26
26
27
31
32
33
For the following models, refer to separate operating and service manuals:
S-CON®MINI Series (SC, SMH model, etc.)
S-CON®MINI CURVE (SMBM model)
S-CON®MINI FLEX (SMFX model)
S-CON®MINI FLOW-BEL (SMF model)

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Upon delivery of this product, please check the package contents to ensure the
product matches your order. If the delivered items do not match your order, please
contact our local agent directly before use.
SZ 30 –1.5C （C25 –1A15.6 ）R –BG
Drive type
Code
Standard-axial motor
C
Vertical-axial motor
W
Vertical-axial motor
(vertically attached)
WD
Power source type
Code
100V single-phase
1
200V single-phase
2
200V three-phase
3
other
0
Motor type
Code
Constant speed
C
Brushless-inverter variable speed
D
Inverter variable speed
F
Frequency
Code
50Hz
A
60Hz
B
Motor output
Code
25W
25
40W
40
50W
50
60W
60
90W
90
130W
13
Switch position
Direction
Code
Right
Normal
direction
R
Left
L
Right
Reverse
direction
RB
Left
LB
①Conveyor model code
②Nominal belt width in cm (eg 30cm)
③Machine length in m (eg 1.5m)
④Drive type (eg Center drive (Standard-axial motor))
Serial number and model label
(affixed to side of drive unit)
① ② ③④⑤ ⑥⑦⑧ ⑨⑩
⑤Motor type (eg Constant speed)
⑥Motor output (eg 25W)
⑩Belt specification
⑦Power source type (eg 100V single-phase)
⑧Power source frequency and Belt speed
(eg 50Hz 15.6m/min)
NOTE: For variable speed, maximum speed is shown.
⑨Switch position and Direction of belt travel
(eg Right, Normal direction)
[Example]
Date of production 20□□.□□
JOB №□□－□□□□□－□□□－□□
SZ30-1.5C（Ｃ25-1A15.6）R-BG
i = 1/18 ，M = 11 P = 13
Manufacturer’s serial number
(Refer to this number when contacting us)
Reduction
gear ratio
Number of sprocket or
timing-pulley teeth
Code
BG
BW
IG
IW
RG
EK
SG
SW
HW
Specification
Standard
Incline
Special
rubber for
inclines
Ultra
anti-static
Sliding
Heat-
resistant
Color
Green
White
Green
White
Green
Black
Green
White
White
Code
OG
OW
KW
KB
XG
XW
XB
XX
NO
Specification
Oil resistant
Antibacterial
Other
None
Color
Green
White
White
Blue
Green
White
Blue
Other
－

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□When using in a high or inclined position:
FOR YOUR SAFE USAGE
CAUTION : Improper handling of the conveyor may result in physical injury or damage!
■Transport and assembly
When transporting and assembling the conveyor, pay special attention not to drop it in order to
avoid physical injury or damage. When lifting by crane, pay attention to the balance of the conveyor.
■Earth and leakage breaker
Ensure the conveyor is connected to earth at all times to prevent electric shock. Also ensure that
an earth leakage breaker is connected to the power supply.
A. Prior To Use
■Emergency stop
Install an emergency stop device to immediately stop the conveyor in emergency.
■Start alarm
If it is not possible to supervise the operation of the full length of the conveyor from the operating
position, install a start alarm for increased safety.
■Keep the conveyor dry at all times
Do NOT use the conveyor in wet or humid areas. Do NOT splash liquids onto the conveyor. Do
NOT use or leave the conveyor outdoors. The machine is not waterproof. Do NOT touch electrical
parts with wet hands.
■Do NOT use in an explosive atmosphere
(Avoid explosive gas, explosive dust, etc.)
■Lower cover and guard
Install the optional lower cover or guard in order to prevent entry under the conveyor.
■Guide rail, top and side covers
To prevent objects from falling off the conveyor, install the optional guide rail, top and/or side
covers.
■Braking system
When using the conveyor on an incline, it is recommended that an optional braking system be
installed, in order to prevent reverse or other incorrect running of the conveyor.
■Environmental conditions
Ambient temperature
Ambient humidity
Atmosphere
Elevation
NOTE：
●Using the conveyor in a strong electric field (eg near broadcasting devices or high- frequency welding
machinery/equipment) could cause the conveyor to malfunction. In this case, install the conveyor at a
sufficient distance. Alternatively shield completely to avoid any interference with the conveyor.
●Using an inverter to this machine could cause other machines to get effects of high-frequency. In this
case, install the conveyor at a sufficient distance or shield completely.
1
CAUTION WHEN HANDLING
：0℃ to +40℃
：RH 90% max(Avoid condensation)
：Indoor(Avoid corrosive gases, dust, etc.)
：1,000m or less


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B. During Operation
C. After Use
WARNING：Improper handling of the conveyor could result in serious physical injury or damage!
■Do NOT touch the conveyor when it is running
There is considerable risk of being caught and injured by the conveyor.
■Do NOT ride on or climb on the conveyor／Do NOT go under the conveyor
There is considerable risk of falling or being caught and injured by the conveyor.
■Beware of entanglement
When working close to the conveyor, take care not to get caught in the conveyor. There is
considerable risk of being injured by the conveyor.
■Do NOT remove safety covers
There is a risk of getting caught in the rotating parts such as pulleys. Only remove in case of
maintenance or inspection.
CAUTION：Improper handling of the conveyor may result in physical injury or damage!
■Do NOT apply force to ends of conveyor
Do NOT press down on, or hang off the sides of the conveyor. Injury may result from a toppling
conveyor.
■Secure the conveyor to the floor/ground
When using the conveyor, be sure to secure it to the floor/ground with anchor bolts etc. to
prevent it from toppling irrespective of indoor use or outdoor use.
■Switch off the power after use
Ensure that the power is switched off when carrying out relocation, inspection, cleaning, etc. of
the conveyor, otherwise there is a risk that the conveyor could start unexpectedly. When leaving
the conveyor unused for a long period, take plug out of the outlet /connector to prevent electric
shock or leakage.
NOTE：1. Always use in accordance with the Occupational Safety and Health Act.
2. If the owner modifies the conveyor, any ill effects will fall outside the conditions of the guarantee.
■Do NOT start the conveyor while it is loaded
The motor may become damaged due to overload. Additionally, the motors of variable-speed type
machines may burn out as a result of running at excessively low speeds for
long periods. Use the conveyor within the specifications, indicated in the instructions for use, and
in the catalogue.
CAUTION：Improper handling of the conveyor may result in physical injury or damage!

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■WARNING LABELS etc. AND ATTACHMENT POSITIONS
For standard machines, warning labels etc. and their attachment positions are as follows:
1. WARNING LABELS
Label classification
Label
Instruction
■ALWAYS CONNECT TO EARTH
Ensure the conveyor is connected to earth at all
times to prevent electric shock.
■DISCONNECT POWER BEFORE SERVICING
Ensure that the power is switched off when carrying out
relocation, inspection, cleaning, etc. of the conveyor,
otherwise there is a risk that conveyor may start
unexpectedly.
CF-2
■DO NOT GET CAUGHT IN MACHINE
When working close to the conveyor, take care not to get
caught in it. There is a risk of being injured by the conveyor.
CG-2
CAUTION
or
WARNING
CA-2
■DO NOT GET CAUGHT IN MACHINE
When working close to the conveyor, take care not to get
caught in it. There is a risk of being injured by the
conveyor.
■DO NOT OPERATE WITHOUT GUARDS IN PLACE
Do NOT remove safety covers etc. There is a risk of getting
caught in the rotating parts such as pulleys. Only remove in
case of maintenance, inspection, etc. unexpectedly.
2. ATTACHMENT POSITIONS OF WARNING LABELS etc.
(eg S-CON®MINI SZ model)

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Frame depth
Model code
30mm
SZ，SZV，SZE，SZEV
60mm
SHZ，SHZV，SHZE，SHZEV
SHZH，SHZHV，SHZM，SHZVM
2
COMPONENT NAMES
Applied models:
NOTE: For roller-edge/knife-edge models, see p.27-31.
NOTE: For telescopic model, see p.32.
NOTE: For tilt models, see p.33.

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1. Place conveyor frame upside down on table. (Assembly is easier this way.)
2. Install control unit delivered in separate packaging. → See p.12. (For constant-speed type using 200V
2. three-phase power source, controller is optional.)
3. If return rollers are delivered in separate packaging, stickers RETURN ROLLER FIXING POSITION are
2. affixed on side of frame. Return roller attachment tap pieces are temporarily bolted into frame
2. underside slots, just under the stickers. Install return rollers using the tap pieces as shown in figures
2. below. (Return rollers are individually packed and temporarily attached beside drive unit.)
NOTE: 1. For center drive type of 2m or less in length, machine has no return roller.
2. In the following cases, return rollers are delivered already installed as shown in fig. 1, i.e.
installation is unnecessary.
-3m or less in machine length and 60mm in frame depth
-3m or less in machine length, 30mm in frame depth and 300mm or less in belt width
3-1. INSTALLING STANDS AND RETURN ROLLERS
3
ASSEMBLY
Installation will become easier by inserting
and tightening bolt into end of tap piece.
4. Stands(optional) are delivered in separate packaging. Install them using the attached stand tap pieces.
NOTE: 1. Install each stand in appropriate position referring to “Standard Installation Positions of
NOTE: 1. Stands”, p.9.
NOTE: 2. For machine length of 1.2m or less, stand tap pieces are delivered inserted into conveyor frame.
5. When assembly is completed, turn over the entire conveyor and place on the floor.
6. Adjust conveyor height following “Stand Height Adjustment”on next page. Confirm full
6. length of frame is straight and level on top, and firmly tighten stand bolts and nuts.

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■Standard Installation Positions of Stands
Considering frame depth and strength, installation positions of stands are determined as follows.
Unit：mm
When conveyor exceeds 3m in length, it is delivered packed as shown below. Assemble conveyor
following the procedures in the tables. (*Return rollers are individually packed and temporarily attached
beside drive unit.)
3-2. ASSEMBLING LONGER MACHINES
PACKAGING
Machine length: 3.01-6.0m Divided into 2 sections
Belt width of 300mm or less: 1 package
Belt width of 350mm or more: 2 packages
■Stand Height Adjustment
NOTE: When adjusting stand heights, take care not to pinch fingers. To prevent conveyor main body
NOTE: from rapidlygoing down, loosen fixing bolts little by little while supporting conveyor with the other
NOTE: hand.
Before starting adjustment, ensure tapered grooves(*1, *2)
and fixing bolts(*3, *4) are positioned correctly as shown
in figure, right. To lower stand upper post(*5), loosen
fixing bolt(*3). If tapered groove(*1) entirely goes down
into stand lower post(*6) while lowering upper post(*5),
tighten fixing bolt(*4) into tapered groove(*2). For more
adjustment, loosen fixing bolt(*4) again. Once adjustment
is completed, tighten fixing bolts(*3, *4). To finely adjust
conveyor level, use level adjusters beneath stand.
NOTE: For belt top height of 550mm or less, stand does
NOTE: not have tapered groove(*2).
Standard
installation
interval
Frame depth
30
60
P1
400
(150 min.)
700
(300 min.)
P2
1200 or less
2300 or less
P3
2000 or less
3000 or less
Frame joint
Belt *Return roller Drive unit
(temporarily attached)
Frame joint
Belt *Return roller
Head frame
Tail frame
(temporarily attached)

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Machine length: 6.01-9.0m Divided into 3 sections 9.01-12.0m Divided into 4 sections
2 packages For machine length of 6.01m or more, intermediate take-up unit is provided on
head frame.
ASSEMBLY
METHOD
1. Loosen
belt.
Loosen belt by turning take-up knobs clockwise.
2.
Assemble
main
body.
(1) Unfold belt. Check installation positions of frames.
(2) Join frames. → See “Joining Frames”, p.11-12.
PACKAGING
Frame joint
Belt
Head frame
Tail frame and
intermediate frame
Intermediate take-up unit
*Return roller
(temporarily attached)
Machine length: 3.01-6.0m Divided into 2 sections
Machine length: 6.01-9.0m Divided into 3 sections 9.01-12.0m Divided into 4 sections
Machine length: 3.01-6.0m Divided into 2 sections
Machine length: 6.01-9.0m Divided into 3 sections 9.01-12.0m Divided into 4 sections

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Divided into 2 sections
Divided into 3 sections
Divided into 4 sections
MACHINE
LENGTH
Component※
MACHINE
LENGTH
Component※
MACHINE
LENGTH
Component※
～3.5
（1.5）＋2.0
～6.5
（2.0）＋1.5＋3.0
～9.5
（2.5）＋2.0＋2.0＋3.0
～4.0
（2.0）＋2.0
～7.0
（2.0）＋2.0＋3.0
～10.0
（3.0）＋2.0＋2.0＋3.0
～4.5
（2.0）＋2.5
～7.5
（2.5）＋2.0＋3.0
～10.5
（3.0）＋2.5＋2.0＋3.0
～5.0
（2.5）＋2.5
～8.0
（3.0）＋2.0＋3.0
～11.0
（3.0）＋3.0＋2.0＋3.0
～5.5
（2.5）＋3.0
～8.5
（3.0）＋2.5＋3.0
～11.5
（3.0）＋3.0＋2.5＋3.0
～6.0
（3.0）＋3.0
～9.0
（3.0）＋3.0＋3.0
～12.0
（3.0）＋3.0＋3.0＋3.0
3. Install
stands
and
return
rollers.
(3) Move tap pieces to installation positions of stands and return rollers. Fix them temporarily and install
stands and return rollers. → See p.8-9.
(4) When assembly is completed, take up belt slack (ref. p.20) and adjust belt alignment (ref. p.21-23).
NOTE: If, as a result of machine length, it is difficult to turn over the entire assembly, first assemble and
turn over in sections, and then join frames.
Lengths of divided frame
Unit：m
※Lengths in parentheses ( ) are variable according to actual machine length.
■Joining Frames
Frame joints are temporarily tightened to one side of frame. Correctly attach them using a hexagonal
wrench as shown below:

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NOTE: If it is necessary to install control unit
NOTE: separately from drive unit, use
NOTE: extension cable (optional) to make
NOTE: connection as shown in figure, right. (If
NOTE: necessary, remove control unit cover
NOTE: to connect connectors. In this case be
NOTE: sure to reinstall control unit cover.)
■Caution When Joining Frames and Setting up Conveyor
1. Install full length of frame straight, not bent in any place.
2. Finely adjust conveyor level. (Use level adjusters beneath stands.)
NOTE: If conveyor is bent or not level on top, belt may stray to one side or the other.
￥
If control unit is delivered in separate packaging, install it as follows:
NOTE: For constant-speed type using 200V three-phase power source, standard machine has only lead
NOTE: wire terminal of motor, control device is optional.
Unpack control unit. Install it near drive unit by tightening control unit attachment bolts (insert-able
bolts)(*1) into underside slot of frame, as shown in figure below.
NOTE: For control unit with micro-inverter, similarly install it.
3-3. INSTALLING CONTROL UNIT
Control unit
Power supply cable
Extension cable
(optional)
Connector
Drive unit
Motor cable
Motor

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3-4. INSTALLING GUIDE RAILS AND SKIRTS (OPTIONAL)
1. Installing Guide Rails
When installing, slightly raise guide rails, giving clearance to prevent belt from touching them. If there is no
clearance, it may cause friction damage to belt and guide rails when belt deviates.
2. Installing Skirts
When installing, ensure skirts are properly touching belt.
If belt deviates, to prevent friction damage of belt and skirt fitting pieces, reinstall skirt fitting pieces raised as
required.
14
35
Skirt
S-A1 model, fixed type
14
35
Skirt
S-A1 model, fixed type
■Insertion of Nuts
When installing additional attachments to frame, insert M6 hexagonal thin nuts into frame slots, as shown in
figures, below.
NOTE: These nuts are delivered as spare parts in tool bag.
M6 hexagonal thin nut
(1) Insert nut into slot diagonally from
above.
(2) Insert something cylindrical and
pointed (eg tip of mechanical
pencil) into nut hole, and lightly
push nut upward.
(3) Continue pushing nut this way until
in position.

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4
RUNNING THE CONVEYOR
4-1. BE SURE TO GROUND MACHINE BEFORE OPERATION
4-2. STARTING CONVEYOR
1. Constant-speed Type
Push illuminating-start switch into “RUN” position. To stop machine, push it to “STOP” position.
NOTE: This switch is not for turning power on and off. When leaving conveyor unused for a long period,
make sure that it is unplugged or mains is off.
100V single-phase power source ：Ground earth terminal (green) of power cable plug.
200V single-phase power source ：Connect earth terminal (green) of power cable to power cable plug
with an earth.
200V three-phase power source ：Standard machine has only lead wire terminal. For constant-speed
type, switch etc. are not provided. When wiring, properly provide an
earth on motor or drive side plate.
●Power cable and terminals
2. Speed-controller Variable-speed Type
(1) Make sure RUN/STOP switch on speed controller is in “STOP” position. Turn on power supply and
ensure that power-on indicator is illuminated.
(2) Set RUN/STOP switch to “RUN” position. Motor will start rotating and conveyor will run. (When
setting RUN/STOP switch, make sure that it is completely either in “RUN” or “STOP” position, but
not halfway.)
(3) To increase speed, turn speed control clockwise; to decrease speed, turn it counterclockwise. Set
appropriate speed for intended use.
(4) To stop conveyor, set RUN/STOP switch to “STOP” position.
NOTE: This switch is not for turning power on and off. When leaving conveyor unused for a long period,
make sure that it is unplugged or mains is off.
AC 100V single-phase Earth (green)
Power cable plug
AC 200V single-phase
Earth (green sleeve)
Power (red sleeve)
Constant speed type
Illuminating-start switch
Power-on indicator
(LED illuminated when powered.)
Speed control
RUN/STOP switch
Model code Speed controller
Variable speed type

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3. Brushless-inverter Variable-speed Type
For brushless-inverter (inverter for brushless-motor variable-
speed control) variable-speed type, operate machine as follows:
NOTE: 1. Be sure to combine brushless inverter with specified
brushless motor.
2. Be sure to ground before use.
(1) Make sure RUN/STOP switch on brushless-inverter
operating panel is in “STOP” position. Turn on power
supply and ensure that power LED (power-on
indicator) is illuminated in green.
(2) Set RUN/STOP switch to “RUN” position. Motor will start
rotating and conveyor will run.
(3) To increase speed, turn speed control clockwise; to decrease
speed, turn it counterclockwise. Set appropriate speed for
intended use. (→See “Variable-speed Range of Brushless-
inverter”, p.17.)
(4) To stop conveyor, set RUN/STOP switch to “STOP”
position.
Brushless-inverter
operating panel
Speed control
Alarm LED (red)
Power LED (green)
Rotation-direction
selecting switch
(CW/CCW)
RUN/STOP switch
Brushless-inverter standard specification
Applied motor
Brushless motor 50W, 130W
Power source
Voltage
Single-phase AC100-120V
Single-phase/three-phase AC200-240V
Permissible
voltage range
±10％
Frequency
50／60Hz
Variable-speed range
(→See *NOTE above.)
-With RED ZONE
General change gear ratio 1:76
(Maximum change gear ratio 1:100)
-Without RED ZONE
Maximum change gear ratio 1:66
Environmental
conditions
Ambient
temperature
－10℃ to ＋40℃
(Avoid freezing.)
Ambient
humidity
Relative humidity 85% max.
(Avoid condensation.)
Atmosphere
Indoor (Avoid splash of liquids,
corrosive/flammable gases, dust, etc.)
Elevation
1000m or less
*NOTE: For details of variable-speed range and RED ZONE, see “Variable-speed Range
of Brushless-inverter”, p.16.
NOTE: 1. Be sure to confirm that the power source voltage is within the rated voltage range, before
turning ON the power source.
2. Be sure to start and stop the conveyor with RUN/STOP switch. When starting and stopping
the machine by external signals, use control circuit terminals on rear of inverter. (→See
“Starting and Stopping the Conveyor by External Signals”, p.16-17.)
3. When leaving the conveyor unused for a long period, make sure that the power supply is off.
(The RUN/STOP switch is not for turning the power on and off.)
4. Before turning off the power supply, be sure to set RUN/STOP switch to “STOP” position,
otherwise there is a risk that the motor will restart rotating unexpectedly when powered.
Moreover make sure that RUN/STOP switch is in “STOP” position before turning on the
power supply.

16
■Variable-speed Range of Brushless-inverter
(Torque at high speed can be used at low speed as well.)
Check if speed control on brushless-inverter operating panel has RED ZONE in high speed area or not.
Variable-speed range depends on speed control type.
(1) Speed Control with RED ZONE (necessary to use carefully)
Nominal speed (motor rotation: 2300 r/min) is determined as the lower limit of RED ZONE. Variable-
speed range up to the lower limit of RED ZONE is 1:76 (motor rotation: 30-2300 r/min).
By using RED ZONE up to the upper limit, it is possible to vary speed up to 1.3 times of nominal speed
(variable-speed range: 1:100, motor rotation: 30-3000r/min).
However, some models cannot be used in RED ZONE, so use the machine within the maximum speed
shown in the catalogue.
NOTE: Since motor rotation increases as the speed gets closer to the upper limit of RED ZONE, this will
increase noise and shorten service life of gear head. Use the machine at appropriate speed to
avoid these troubles.
(2) Speed Control without RED ZONE
Nominal speed (motor rotation: 2000 r/min) is determined as the upper limit. Variable-speed range is
1:66 (motor rotation: 30-2000 r/min).
This applies to machines using vertical-axial gear head, SMBM model (curve belt type) or cases for which
high-speed rotation is inappropriate.
NOTE: Variable-speed range is limited by the setting device B. When the setting device B is initialized,
reset the upper limit to motor rotation of 2000r/min. → For details, refer to “Brushless-inverter
instruction manual”, appendix.
■Starting and Stopping the Conveyor by External Signals
When starting and stopping the conveyor frequently in a short period (tact operation etc.), it is impossible
to start and stop the machine by turning on/off the power supply. (The controller may get damaged and
trip.) In this case be sure to start and stop the machine by external signals. For start and stop circuit by
external signals, make connection to external control circuit terminals on rear of brushless-inverter.
NOTE: Do not start and stop the conveyor excessively frequently. It may cause machine failure or shorten
its service life.
NOTE: 1. Be sure to ground earth. (D-type grounding, 100Ω or less, φ1.6mm or more)
2. Noise filter, NFB, etc. should be set up by user.
3. When making connection to external control terminals, use special cable for external control
(optional).
4. For reversible operation by external signals, set rotation-direction selecting switch to CCW.
●Brushless-inverter operating panel
Speed control with RED ZONE
Speed control
Alarm LED (red)
Power LED (green)
Rotation-direction
selecting switch
(CW/CCW)
RED ZONE
(necessary to use
carefully)
This border is standard.
(If accurate speed required,
actually measure speed
or use setting device B.)
RUN/STOP switch
Speed control without RED ZONE
Speed control
Alarm LED (red)
Power LED (green)
Rotation-direction
selecting switch
(CW/CCW)
RUN/STOP switch

17
■Caution When Using Brushless-inverter
1. Be sure to confirm that the power source voltage is within the rated voltage range,
before switching ON the power source.
(Voltage exceeding the rated voltage could cause fuming, abnormal noise, etc.)
2. Be sure to start and stop the conveyor with RUN/STOP switch. When starting and
stopping the conveyor frequently in a short period (tact operation etc.), it is impossible
to start/stop the machine by turning on/off the power supply. In this case be sure to
start and stop the machine by external signals. (The controller may get damaged and
trip.) Do not start and stop the conveyor excessively frequently. It may cause machine
failure or shorten its service life.
3. The RUN/STOP switch of control unit is not for turning the power on and off. When
leaving the conveyor unused for a long period, make sure that the mains is off.
4. Do not run the conveyor at excessively low speed for a long period, or start and stop
the conveyor excessively frequently. These may cause machine failure or shorten its
service life.
5. Do not touch the inverter radiator of side of control unit, and do not allow any material
to touch it, because of its high temperature.
6. Use the control unit within the permissible range of ambient temperature (from –10℃ to
＋40℃). Avoid freezing.
7. Pay special attention not to allow any foreign matter (dust, iron powder, etc.) to get into
the control unit.
8. Operating the motor using the inverter could cause noises from the inverter I/O cables,
motor, etc. Keep in mind that these could interfere with the correct operation of other
electronic devices. (In this case, noises and their effects can be suppressed to some
extent by providing the inverter I/O with a filter or otherwise shielding the power cable.)
For details, refer to “Brushless-inverter instruction manual”, appendix.
●Standard connection diagram of
brushless-motor and power source
(eg 200V three-phase)
●Standard connection diagram for
starting/stopping conveyor by external
signals (eg Reversible operation)
Brushless-motor
Motor side connector
Motor side earth terminal
Control signal connector (I/O)
Motor connecting connector (MOTOR)
Power source input terminal base (POWER)
*Power source input
Connector I/O
for external
control signals
Rotation-direction selecting switch Start/stop switch
Earth terminal
2 pieces
Rear of brushless-inverter When using connector I/O for external

signals (cable with I/O connector) Item
y.
NFB
L 3
L 2
L 1
０２
０１
＋５Ｖ
ＧＮＤ
ＦＩＮ
Ｉ２
Ｉ３
Ｉ１
（ ）
Noise filter
*NOTE: For single-phase power source, connect
power source input terminals to L1 and L2.

18
■Circuit Protector
(1) Constant-speed Type/Speed-controller Variable-speed Type
To prevent motor from burning out due to overload etc., it is recommended to provide the machine with
a circuit protector(optional). When protector is activated and conveyor stops, reset button pops out. In
this case always switch off power and set RUN/STOP switch to “STOP”. Reset button may be pressed
in to restore circuit, and machine can be restarted by setting RUN/STOP switch to “RUN”.
NOTE: Before restarting machine, carefully check for cause of stoppage and ensure it is removed.
Reverse switch
(optional)
Circuit protector reset button
(optional)
●Control unit of constant-speed type or
speed-controller variable-speed type
(2) Brushless-inverter Variable-speed Type
Brushless-inverter has built-in protective function against
overload, overcurrent, overheat, etc. In emergency, brushless-
inverter trips and alarm LED is illuminated in red.
NOTE: 1. When brushless-inverter trips, immediately set
RUN/STOP switch to “STOP” position and turn off
power supply. Before restarting machine, carefully
check for cause of trip and ensure it is removed.
NOTE: 2. When voltage is insufficient, alarm LED is illuminated
in red. However, brushless-inverter does not trip in
standard circuit.
NOTE: 3. For increased safety, separately install overcurrent
protective device on power source side.
Brushless-inverter operating panel
Speed control
Alarm LED (red)
Power LED (green)
Rotation-direction
selecting switch
(CW/CCW)
RUN/STOP switch
4-3. CHANGING DIRECTION OF CONVEYOR TRAVEL
1. Machine with Reverse Switch
(1) Constant-speed Type
To change direction of belt travel, flip reverse switch of control unit.
NOTE: Before operating reverse switch, be sure to stop the conveyor by setting RUN/STOP switch on
operating panel to “STOP” position.

19
(2) Brushless-inverter Variable-speed Type
To change direction of belt travel, slide the reverse switch (rotation-direction selecting switch) on inverter
operating panel from CCW to CW (or from CW to CCW).
(For brushless-inverter operating panel, see p.15 or 18.)
NOTE: Before operating the reverse switch (rotation-direction selecting switch), be sure to stop the
conveyor by setting RUN/STOP switch on operating panel to “STOP” position. (For brushless-
inverter variable-speed type, if set position of rotation-direction selecting switch is changed while
RUN/STOP switch is in “RUN” position, belt running will be rapidly reversed and brushless-
inverter may trip due to inertia of load. In this case alarm LED will be illuminated in red.)
2. Machine without Reverse Switch
To change direction of belt travel, remove control box cover and change electrical wiring connections as
follows:
■Removing Control Box Cover
Loosen cover fixing bolts(*1)(one bolt on each side) and remove the cover(*2) sideways. (If difficult,
remove the entire control box from frame, and then remove fixing bolts and cover. In this case do not
loosen any of the other bolts on sides of control box.)
(1) Constant-speed Type
Connector(*3) is found in center of base plate inside box cover(*2). Press down hook(*4) on the top with
your finger and disconnect connector(*3) from base plate. Then replace it with connector(*5), which is
attached to connector(*3). (Connectors(*3, *5) can be identified by lead wire colors, red or white.)
(2) Speed-controller Variable-speed Type
On rear of speed controller, disconnect lead wire from CW terminal and connect it to CCW terminal.
NOTE: 1. For 200V three-phase power
NOTE: 1. source, switch positions of any two
NOTE: 1. of three power supply wires.
NOTE: 2. After changing direction of conveyor
NOTE: 1. travel, ensure belt is correctly aligned
NOTE: 1. before starting machine. For belt
NOTE: 1. alignment adjustment, see p.21 to
NOTE: 1. 23.
NOTE: 3. Do not change direction of conveyor
NOTE: 1. travel frequently. It may cause
NOTE: 1. machine failure.
Connection for normal direction for reverse direction
ＣＯＭ
ＣＷ
ＣＯＭ
ＣＣＷ
Rear of speed
controller

20
5
TAKING UP THE BELT
When belt is slackened off, take up belt as follows:
To take up belt, turn right and left take-up knobs(*1)
of drive unit counterclockwise. When turning take-up
knobs(*1), adjust them alternately, little by little, to
keep their movement lengths the same.
■Belt Tension
Do not take up belt too much, but only to extent that
belt does not slip on drive pulley, i.e. enough to drive belt.
NOTE: Excessive belt take-up may overload motor
or shorten service lives of belt, pulley, etc.
How to calculate belt expansion percentage
1) Slacken belt.
2) Mark any two points on belt surface and measure length between them (ℓ).
3) Take up belt.
4) Measure length between two marks (ℓ1) again.
eg ℓ= 1000 mm
ℓ1= 1002 mm
Belt expansion percentage = 0.2 %
Standard belt expansion percentage
■Adjustment Using Intermediate Take-up Unit
(for longer machines exceeding 6m in length)
(1) Fully loosen take-up knobs(*1) of drive unit. (Turn them clockwise.)
(2) Take up belt by turning take-up knobs(*2) of intermediate take-up unit counterclockwise. When
(2) turning take-up knobs(*2), adjust them alternately, little by little, to keep their movement lengths the
(2) same.
(3) To completely remove belt slack, turn take-up knobs(*1) of drive unit counterclockwise. Also adjust
(2) belt alignment while turning take-up knobs(*1).
Nominal belt
width (mm)
Expansion
percentage (%)
～200
0.2
250～600
0.15～0.1
600～1,000 or
Motor power of
0.2kW or more
0.1