KYOKUTOH CWDS-01 User manual

2021-04-19 Revised edition
Water Draining System
CWDS-01

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Table of Contents
1. Safety precautions ·······················································2
2. Performance parameters ················································3
3. External dimensions ·····················································4
4. Parts description ·························································5
5. Main parts·································································6
6. Installation ································································7
7. Piping connection························································7
8. Operating principle ······················································8
9. Workflow ·································································8
10. Elimination of malfunctions ···········································9
11. Maintenance ·····························································9
12. List of supplies ··························································9
Contact ········································································10

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1. Safety precautions
This "CWDS-01 series" water draining system is a device that prevents the
water of a welding gun from spouting out when replacing tips in spot welding lines.
Never use it for purposes other than replacing or dressing tips. Our company shall
bear no liability regarding any failures, repairs, accidents or other defects that occur
for reasons other than those specified uses.
If the product is mishandled, injuries and damages to the
parts may occur.
This symbol indicates "prohibited" content that must not be
carried out.
This symbol indicates "compulsory" content that must be
carried out.
Precautions for use
Never disassemble or modify the product.
Prohibited item Doing so may cause abnormalities and the body of the
product to break.
Do not damage, forcefully pull, or place anything heavy on
the water pipe.
The water pipe may burst and interfere with normal
operation.
Do not use saline or acidic types of cleaning solutions for
maintenance of the product body.
Doing so may cause corrosion to the parts and members.
!
Caution
!

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Make sure the frame is firmly secured before using.
Failure to properly secure the frame during operation
may cause the product to operate abnormally.
It may cause failures or accidents.
Caution Install the base of the device perpendicular to the floor.
Installing it at an angle will have an impact on the use
effectiveness.
Regularly inspect the body of the product to check for water
or air leaks.
Such leaks can have an impact on use effectiveness
and may cause damage to other facilities.
2. Performance parameters:
Model CWDS-01
External dimensions 336W×275D×133H
Atmospheric pressure 0.5 - 0.8
Mounting holes L200 x H255 (4-M8)
Effective mounting area L240 x H290 mm
Voltage DC24V
Power 10 W
Rated current 0.5 A
Applicable welding gun C type gun / X type gun
*After reading this instruction manual, keep it in a place where the operators can read
it at any time.
!

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3. External dimensions

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4. Parts description
Check valve
Solenoid valve
Switching
valve
Electric control
Water pump
Connection to
drainpipe
Air source joint
Connection of
welding gun
condensate
Connection of water
supply to the
welding gun
Control power

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5. Main parts
List of parts
No.
Name of part
Model
Unit
Quantity
Remarks
1
Check valve
CW-WG-RB-V1-DXFZ
Pieces
1
2
Solenoid valve
CW-WG-RB-V1-DCFZ
Pieces
1
3
Switching valve
CW-WG-RB-V1-JZFZ
Pieces
1
4
Electric control
CW-WG-RB-V1-KC01
Pieces
1
5
Water pump
CW-WG-RB-V1-5020
Pieces
1
Name of parts
Description of function
Check valve
Changes the direction of water pumping of water draining system.
Solenoid valve
Power system for water pumping of the water draining system.
Switching valve
Shuts off or connects the water supply and drainage pipe.
Electric control
Electric control hardware for the water draining system to repeatedly
pump-up water.
Water pump
Starts the water draining system, sucks up any residual water into the
water tank of the welding gun and discharges it into the condensate.
Cable joint (M14)
Drive power signal connection.
Air source connection (φ8)
Air source connection for the water draining system.
Condensate main pipe
connection (φ8)
Connection for the water draining system to remove water into the
condensate main pipe.
Water supply connection
(φ8)
Water supply connection for the water of the welding gun, by which
the removal of the incoming water is realized.
Condensate connection (φ8)
Condensate connection for the water of the welding gun, by which the
removal of condensate is realized.
5
2
1
4
3

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6. Installation
1. Install the base of the water draining system perpendicular to the floor and the pipe
connection supine.
2. Secure it with 4-M8 screws.
3. Secure it firmly so that the water draining system will not be unbalanced.
4. When installing, ensure that the "Robot water outlet" is 200 mm lower than the
"Cap tip removal check" limit switch on a tip changer.
5. When installing, the connection piping between the water of the robot base and the
water draining system must be within 1500 mm.
6. Since some air will flow into the cooling conduit during the first installation,
remove the air before using the water draining system.
7. Since the water draining system is activated by energization to the solenoid valve,
keep the solenoid valve energized during tip replacement and switch off the solenoid
valve after the replacement is complete.
8. Conduit connection conditions:
8-1. The solenoid valve is required to control the water being conveyed to the robotic
gun and the water flow in and out of the air unit. It is therefore necessary to make sure
that successful control of shutoff / connection of the conduit is ensured.
8-2. When using such residual water, connect the pipes appropriately according to the
water inflow and outflow method. For more details, refer to the piping connection
diagram.
7. Piping connection
Note: When using the water draining system, note that the welding gun has a separate cooling conduit,
as shown below, which must be controlled by the separate valve.
Incoming water
Outgoing water
Check valve
Check valve
Welding gun
Water draining
system
Removal of
incoming
water
Removal of condensate
Drainage of residual water
Air source

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8. Operating principle
Start the water draining system before replacing the tip to prevent a large amount
of water running out from the welding gun when the tip of the gun is removed. In the
water draining system, the solenoid valve controls the cylinder movement, which drives
the water tank to suck up water continuously. The residual water that is taken into the
water tank is drained to the condensate by the check valve so that the welding gun and
the piping are constantly maintained at a negative pressure at the same time.
9. Workflow
(1) The robot starts the tip exchange program.
(2) At the same time, shut off the water inflow/outflow check valve which controls the
shutoff / connection of the welding gun conduit.
(3) Start the water draining system and remove the water pressure in the welding gun
to maintain a constant negative pressure.
(4) Remove the tip.
(5) The robot executes the tip replacement program.
(6) Once the tip replacement is complete, turn off the water draining system and open
the valve.
(7) After the replacement is complete, make sure that the robot runs the water and that
any air in the water pipe is removed before welding.

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10. Elimination of failures
Problems and countermeasures
Problem Cause Countermeasure
There is a large
amount of
residual water
during the tip
replacement.
When the water draining system
operates, the inflow and outflow of water
is not being shut off by the water
inflow/outflow valve which controls the
shutoff / connection of the welding gun
conduit.
Check if there are any
abnormalities with the solenoid
valve controlling the welding gun
conduit and if the solenoid valve is
functioning to shut off the
inflow/outflow of water.
The residual water and welding gun
conduit is not correctly connected.
Check the connection between the
residual water and welding gun
conduit.
The check valve assembly is damaged.
Replace the check valve assembly.
The water tank is damaged. Replace the water tank.
The solenoid valve assembly is damaged. Replace the solenoid valve
assembly.
The water draining system does not
respond.
Sequentially check the air sources,
the power supply, and the electrical
routes.
11. Maintenance
No. Maintenance item Period
1
Check for water leaks at the joints.
3 months
2 Check the amount of water during tip replacement. 6 months
12. List of supplies
No.
Name
Model
Quantity
Remarks
1
Check valve
CW-WG-RB-V1-DXFZ
1
2
Solenoid valve CW-WG-RB-V1-DCFZ
1
3
Switching valve
CW-WG-RB-V1-JZFZ
1
4
Intermediate relay
(Izumi)
RJ2S-CLD-D24
(with socket)
2
5
Cylinder
CDQ2B50-20DZ-M9BA
1
6
Water tank
CW-WG-RB-V1-02
1

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KYOKUTOH CO., LTD
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cho, Nisshin, Aichi
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Water Draining System – CWDS-01 -
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KYOKUTOH WELD INDIA
Office No.19, 3rd Floor, Aditya Centeegra, FC
Road, Deccan,
Pune - 411004
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