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WCS-SIF-01
Training & Maintenance Manual
Pneumatic
Parker Hannifin Corporation
Pneumatic Division
Richland, Michigan
www.parker.com/pneumatics
Maintenance, Troubleshooting & Warnings
Warnings
Scheduled Maintenance
Silencer –
Periodic maintenance of the exhaust mufflers may
be required. The frequency of maintenance depends on the
environment and condition of the air supply.
!
Cautions
• Filtrate the inlet air to protect the weld block against
contaminating matter typically found in compressed air
systems (i.e. rust, water, compressor oil, or other foreign
particles). A standard 40 micron filter is recommended.
If liquid aerosols, both water and oil, and submicron
particulate matter need to be removed from your air system,
then a coalescing filter is required.
• The inlet compressed air must be filtered, regulated, and
periodically maintained to ensure maximum operating
performance and warranty.
Weld Block Troubleshooting
Always verify that air and electrical are connected properly
per Installation Instructions on page 4. At startup, cylinder
should be open fully with no electrical signal to solenoids.
All air lines, filters, regulators, tubing, hoses, fittings and
electrical cables should be in good working condition as
specified in automotive plant maintenance schedule.
1. Cylinder does not extend / retract.
• Does the cylinder move using manual overrides?
– If yes, then check electrical conditions.
Check the following:
• Solenoid connections
• Coils – replace if necessary
• PLC program
– If no, does the cylinder move freely with air turned off?
• If no, then cylinder should be repaired / replaced.
• If yes, is the flow control open?
– If no, open flow control. See Setup Instructions
on page 5.
– If yes, verify with gauges that there is pressure
on back side of cylinder when valve shifts. There
is a possibility that the metering of exhaust
air on the front side of the cylinder, due to the
flow control, is creating a “Joe Block” effect
occurring between the piston face and cylinder.
Contact Parker Representative for assistance.
– If yes, replace valves on System
2. Cylinder tips close too fast / slow.
• Adjust flow control. See Setup Instructions on page 5.
• Quick Exhaust only – Adjust air timer on quick exhaust.
• Check muffler for proper operation. If covered with
weld slag, then replace muffler.
3. Weld gun does not fire weld.
• Is cable connected to sensor?
– If no, connect to sensor
– If yes, is cable connected to PLC?
• If no, wire to controller
• If yes, check PLC program on location of weld
signal to start weld. Also verify feedback sensor
is operating properly.
4. Weld gun fires before tips are closed
• Adjust flow control so that weld tips close slower. See
Setup Instructions on page 5.
• Is sensor input in the PLC correct? See Setup
Instructions on page 5.
!
WARNING
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF
THE PRODUCTS AND/OR SYSTEMS DESCRIBED HEREIN OR
RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND
PROPERTY DAMAGE.
This document and other information from Parker Hannifin
Corporation, its subsidiaries and authorized distributors provide
product and/or system options for further investigation by users having
technical expertise. It is important that you analyze all aspects of your
application, including consequences of any failure and review the
information concerning the product or systems in the current product
catalog. Due to the variety of operating conditions and applications
for these products or systems, the user, through its own analysis
and testing, is solely responsible for making the final selection of the
products and systems and assuring that all performance, safety and
warning requirements of the application are met.
The products described herein, including without limitation, product
features, specifications, designs, availability and pricing, are subject
to change by Parker Hannifin Corporation and its subsidiaries at any
time without notice.
EXTRA COPIES OF THESE INSTRUCTIONS ARE AVAILABLE FOR
INCLUSION IN EQUIPMENT / MAINTENANCE MANUALS THAT UTILIZE
THESE PRODUCTS. CONTACT YOUR LOCAL REPRESENTATIVE.
!
WARNING
To avoid unpredictable system behavior that can cause personal
injury and property damage:
• Disconnect electrical supply (when necessary) before installation,
servicing, or conversion.
• Disconnect air supply and depressurize all air lines connected
to this product before installation, servicing, or conversion.
• Operate within the manufacturer’s specified pressure,
temperature, and other conditions listed in these instructions.
• Medium must be moisture-free if ambient temperature is below
freezing.
• Service according to procedures listed in these instructions.
• Installation, service, and conversion of these products must be
performed by knowledgeable personnel who understand how
pneumatic products are to be applied.
• After installation, servicing, or conversion, air and electrical
supplies (when necessary) should be connected and the product
tested for proper function and leakage. If audible leakage is present,
or the product does not operate properly, do not put into use.
• Warnings and specifications on the product should not be
covered by paint, etc. If masking is not possible, contact your
local representative for replacement labels.