DSK Geared motor User manual

Geared motor
Instruction Manual
For safe operation
●The contents of this Instruction Manual should be carefully read and understood before
operating this product.
●The Instruction Manual should be delivered to a person who actually operate
this product.
●The Instruction Manual should carefully be kept in a convenient place for the operator.

In this Manual, the case of mishandling the equipment, are classified into two categories,
Danger and Caution . The definition of the
classifications are given with the corresponding
graphic symbol.
Danger
The case that the mishandling of the equipment may result in
dangerous situation and may lead to serious of fatal injury to
personnel.
Caution
The case that the mishandling of th
e equipment may result in
dangerous situation and may lead to medium to light injury or the
case that may result in damage to the equipment.
Please be aware that even items marked Caution may cause fatal accidents.
Therefore, be sure to follow the instructions.

Danger
●Be sure to use an explosion-proof motor where any explosive or flammable gases
exist.
Failure to observe this warning may cause explosion, spark, fire, electric shock, physical injury
and/or
damage to the equipment.
●The operator in charge of transportation, installation, wiring,operation, maintenance,
and inspection of the equipment should have enough knowledge and technical skill
for the product.
Failure to observe this warning may cause explosion, spark, fire, electric shock,
physical injury and/or
damage to the equipment.
●Do not repair or wire the equipment with the electric power on. Be sure to cut the
power off before getting to work.
Failure to observe this warning may cause electrical shock.
●If the equipment is to be used in system of human transport, be sure to finish it with
a protective device for safety.
Failure to observe this warning may cause physical injury and/or damage to the equipment
By accidental falling.
●If the equipment is to be used with an elevator, be sure to finish it with
a safety devise
to prevent the elevator from accidental falling.
Failure to observe this warning may cause physical injury and/or dam
age to the equipment
by accidental falling.
●Be sure not to get water or oil/grease into the brake unit.
Failure to observe this warning may cause accidental falling and/or ru
naway accident by
the decreased brake torque.

Contents
1 Motor Designation ………………………………………………………….P4
2 Check at Packing …………………………………………………………..P5
3 Transportation ……………………………………………………………...P5
4 Installation ………………………………………………………………...P6
5 Connecting with other Equipment ……………………………………….P7
6 Direction of Rotation ………………………………………………………P10
7 Wiring ……………………………………………………………………….P10
8 Operation ……………………………………………………………………P16
9 Inspection and Adjustment………………………………………………...P17
10 Troubleshooting ……………………………………………………….……P21
11 Disposal………………………………………………………………………P22
12 Warranty …………………………………………………………………….P23
Caution
●Do not use gearmotor under conditions other then specified in the name plate
or the product specification.
Failure to observe this warning may cause explosion, spark, fire, electric shock, physical injury,
and/or damage to the equipment.
●Do not insert your finger or any kind of object into the aperture of the gearmotor.
Failure to observe this warning may cause electrical shock, physical injury, fire and/or demage
to equipment.
●Do not use damaged gearmotor.
Failure to observe this warning may cause physical injury and/or fire.
●Do not use damaged gearmotor.
Failure to observe this warning may cause physical injury and/or fire.
●The manufacture will not warrant and will not be responsible for the product modified
or repaired by the user himself.

■ 2 Reduction Stage
1 MOTOR 7 Key 13 Bolt 19 2nd gear 25 Key
2 Motor shaft 8 3nd gear 14 Pin 20 Case 26 2nd pinion
3 H-S-RING 9 bearing 15 End bracket 21 Pinion 27 Bearing
4 BEARING 10 Oil seal 16 Bearing 22 Bearing
5 EYE BOLT 11 Output shaft 17 Key 23 Bearing
6 Oil inlet plug 12 Bolt 18 O-Ring 24 1st gear
■ 3 Reduction Stage

When unpacking the carton, please check up the following. If you have any problems or
questions, please do not hesitate to contact the nearest sales office or agent.
Caution
Check whether the product is same product as you ordered.
Installing wrong equipment may cause physical injury and/or damage to the equipment.
2.1 The ordered product and the contents indicated in the nameplate are correct.
Type, Reduction ratio, Motor capacity, Voltage, Frequency, ect
2.2 No accidental damage to the product during transportation, moisture, dust.
2.3 Screws or nuts are not loose.
2.4 Check the product condition(load, frequency of use, etc.) with connection machine
is same as you ordered.
Danger
When a product is lifted up for tran
sportation, be sure not to enter underneath of the
lifted product.
Falling of product may cause serious injury
Caution
Be careful when transporting products to avoid falling down.
When an eyebolt or eyeplate is provided with gearmotor, be sure to confi
rm if there is
any loosening before using it.
After installing gearmotor to the other equipment, do not hoist the entire machine using
an eyebolt.
Failure to observe this warning may cause physical injury and/or damage to the equipment.

Proper installation of a product will ensure reliable service and maximum life.
Caution
●Do not place any inflammable object near the gearmotor.
Failure to observe this warning may cause fire.
●Do not place any object which may interfere with the ventilation around the
gearmotor.
Failure to observe this warning may cause abnormal overheating caused by the block of cool
air, which may cause burn injury and/or fire.
●Do not step up on a gearmoter or hang on it.
Failure to observe this warning may cause physical injury.
●Do not touch the edge of gearmotor or key groove in the bore with wet hand.
Failure to observe this warning may cause physical injury.
●In equipments like food machines, which must avoid oil, furnish with protective device
like oil pan, in order to protect from the oil leakage caused by failure or life of the
manufactured product.
Leaking oil may cause defective product.
●Vibrations that come out from the installation surface of gearmotor or from other
source should be minimized to under 0.5G.
4.1 Proper location for installation
Ambient Temperature : -10℃ ~ 40℃
Ambient Humidity : 85% max
Altitude : Sea level to 1,000 m max

Environment : Well ventilated place free from vapor and/or dust,
circumstances where any explosive and flammable gases exist.
Installation Location : Indoors
4.2 Direction of Installation
The product can be installed in any direction.(Due to a grease lubrication system.
No inversion of foreign article to the brake.
4.3 Method for Installation
Fix the product with the four bolts on a flat (Roughness of the surface should
be less then 0.2mm) and machine surface free from vibration.
Danger
●When connecting the gearmotor with load, make sure of the alignment of shaft,
the tension of the belt and parallelism of pulleys. In direct coupling, be sure to check
whether the alignment of shaft is extremely precise.
If the belt is to used, be sure to adjust its tension properly.
Also, before operation, inspect whether the setting bolts for pulleys and coupling are
securely tightened.
Failure to observe this warning may cause serious injury and/or damage to equipment due
to broken parts.
●Safe guards should be furnished around rotating part.
Failure to observe this warning may cause serious injury.
Please remove the rust protecting cover on the out put before you operate.
When installing a coupling device(coupling, sprocket, pulley, etc)on the gearmotor the fit
should be in the neighborhood of H7.

.1 Direct Connection
When the machine is used with its shaft coupled together directly, use flexible
coupling and make sure that both ends are in alignment.
●An example of gear coupling
Allowance of Tolerance A 0.05 mm
Allowance of Tolerance B 0.04 mm
Tolerance X Specified by coupling maker
.2 Attaching Chains. V-Belts, Gears etc.
① In any connection center of the shaft of the reducer and that of the other equipment
are parallel.
② The tension of the Chains/ V-Belts and the coupling of gear must
be perpendicular to the center of shaft.
③ When the machine is driven by rearing, gearmotor or reducer should be installed
setting up the center distance accurately and avoiding partial bearing of gear,
and the output shaft is pushed downward (refer to figure)

● Example for Gear Drive
④ Diameter of the chain sprocket wheel or gearing that is mounted on the output shaft;
the diameter should be 3 times as large as output diameter.
⑤ Tension of V-Belt : Excessive tensioning may result in damage of the bearings of the
shaft.
Tension of the chain : Excessive tensioning may result in damage of the bearings of
the shaft. If the chain is installed loosely, shock load will occur when the drive shaft
starts location, and this can results in damage to the reducer and the other equipment.
therefore, adjust the tension of the chain properly. (refer to figure)
Amount of slack for chains S=0.02L
L = SPAN
⑥ Point of load application on the output shaft
The gearing or chain sprocket wheel must be amounted so the point of load
application is a near as possible to the face of the unit to minimize overhung load.

● Proper Way of Use.
The tension of the Chains/
V-Belts are properly set.
Pulley and sprocket are properly
positioned.
● Bed Example
The chain is too loose.
The point of load is not near to the
gearmotor.
⑦ When load is applied on the output shaft(over hung load), please make sure that it is
within the limit of allowable value.(Refer to Catalogue)

Caution
Before coupling with other machine, be sure to check the direction of rotation.
Operation in wrong direction may cause serious injury and/or damage to the equipment.
The relation between the input shaft and the output shaft are shown below:
0.2 ~ 7. kW Capasity
Reduction Ratio 1/5 ~ 1/20(2 Reduction stage) same direction
Reduction Ratio 1/25 ~ 1/200(3 Reduction stage) counter direction
Danger
●When connecting the machine to the power cable, be sure to follow the Instruction
Manual.
Failure to observe this warning may cause electric shock or fire.
(In case of no terminal box, be sure to insulate a wire at the terminal area)
●Do not bend, pull, or tuck down power cables or motor lead wires forcibly.
Failure to observe this warning may cause electric shock.
●Be sure to ground the terminal of the earth wire.
Failure to observe this warning may cause electric shock.
●Be sure to use the electric current source specified in the name plate.
Failure to observe this warning may cause burnout of the motor and/or fire.

Caution
●Do not touch terminals when inspecting the insulation resistants.
Failure to observe this warning may cause electric shock.
●Wiring should be properly made under the specified electrical
equipment engineering standard or the safe code.
Failure to observe this warning may cause electric shock, fire or physical injury.
●Our motor is not equipped with protective devices. The electrical equipment
engineering standards provide that an overload protection device should be installed in
a unit. Other protection devices such as circuit braker are also recommended to be
installed.
Failure to observe this warning may cause damage to the equipment, electric shock, fire or
physical
injury.
●When rotating gearmotor alone, take off the key attached temporarily to the output
shaft.
Failure to observe this warning may cause physical injury.
●Check the direction of the rotation before connecting with the other machine.
Failure to observe this warning may cause damage to the equipment and/or physical injury.
●If drive motor with inverter make be sure to attach a control filter or a reactor to the
inverter.
●Voltage drop in the wiring should be kept within 2%.
Excessive length or wiring may cause steep voltage drop and makes the motor disable to start up.
●When reversing a gearmotor be sure to stop rotating and then start reversing.
Failure to observe this warning may cause damage to the equipment.
●For a gearmotor with brake, do not energize continuously to the brake unit during the
rest of motor.
The continuous supply may cause burning of brake coil and fire.
●If a gearmotor with brake used for the application such as lift, safety device for falling
accident should be employed.
To avoid accidental falling.

7.1 Wiring of Gearmotor
For standard gearmotors, wiring described below are recommended.
Wiring of instruction manual is only for our standard product.
If the wiring indicates on the product is different from our instruction manual please
contact to nearest sales office or agent.
■ 3-phase motor
￭Double Voltage
▪ 220V / 380V Wiring
220V ( ) 380V (Y)
▪ 220V / 440V Wiring
220V (2Y) 440V (1Y)

￭Single Voltage
Single Voltage
To reverse rotation, exchange any two of R, S, T connection.
■Single-phase motor
￭ Single Voltage
3 Lines 4 Lines
To reverse rotation, separate from and  
connect wit as shown with dotted line. 
To reverse rotation, exchange and as  
shown with dotted line.

7.2 Wiring for the gearmotor with brake
■3-phase motor
￭ AC BRAKE motor(B Type)
▪220V / 380V Wiring(Concurrent operate system)
220V ( ) 380V (Y)
▪ 220V / 380V Wiring(Separate operate system)
220V ( ) 380V (Y)

▪ Single Voltage
Concurrent operate Separate operate
￭ DC Brake Motor (B Type)
▪220V / 380V Wiring(Concurrent changing system)
AC220V AC380V
▪Single Voltage Wiring(Concurrent changing system)
Single Voltage

▪220V / 380V Wiring(Separate changing system)
AC220V AC380V
MC : Magnetic Contactor , PM : DC Power Supply, OLR : Over Load Relay
7.3 Cautions in operation with inverter
Higher temperature rise, noise and vibration than that from the general power
source will be observed. Especially, low speed rotation which naturally reduce the fun
effect, may cause abnormal rise of temperature.
(More than 80˚C at the surface of the motor.)
In the gearmotor with brake or with clutch/brake, malfunction of the brake may be
observed due to the voltage drop. In order to avoid this disadvantage, be sure to by
pass the inverter when wiring the brake clutch.
It is feasible to use inverter in the single-phase motor.
When using inverter in the 400V class motor, consult with Inverter manufacturer
concerning the micro surge voltage.

Danger
●Do not operate gearmotor with the terminal box cover opened.
Failure to observe this warning may cause electric shock
●Do not approach or touch rotating parts such as a shaft while the machine is running.
Failure to observe this warning may cause physical injury.
●If power cut occurs, be sure to switch off the power supply of a machine.
Unexpected recovery of electric power service may cause physical injury and/or damage to
the equipment.
Caution
●The gearmotor becomes hot during operation, so do not touch.
Failure to observe this warning may cause burn injury.
●When gearmotor is found abnormal, stop running immediately.
Failure to observe this warning may cause electric shock, physical injury and/or fire.
●Do not overload a gearmotor.
Failure to observe this warning may cause demage to the equipment and/or physical injury.
●Do not touch the current applying part of condenser till the current be
completely discharged.
Failure to observe this warning may cause electric shock.
Caution
●When a single-phase motor is to be reversed, be sure to start reversing after
complete rest of motor.
Direction of rotation may not change and may cause running out of control.

8.1 Check up matter before turning the power switch on:
1 Wiring and connection are done properly
2 Fuses and thermal relays of proper capacities are used.
3 Installations and the connections with other machines are properly done.
4 Earth terminal is properly grounded
8.2 Check up matters at test running:
Confirm the direction of rotation for 1~2 seconds after starting the motor with
unloaded condition.
When you find the rotation in the opposite direction, change the wiring.
Practice, running-in of the motor unload condition. When no defects is
observed, add load gradually and eventually start operation with full load.
8.3 Check up matters during operation:
Confirm that there is no abnormal noise or vibration at all. When such defect are
observed, stop operation immediately. Failure to observe this warning may cause
damage to the equipment and/or physical injury.
Confirm that the surface temperature or a gear case or motor frame does not exceed
80˚C. Do not touch the surface with bare hands. Failure to observe this warning may
cause burn injury