CHAPTER 5: MAINTENANCE
CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
5-4
990-430
Section II. Maintenance
Calibration
Calibration must be performed by factory-trained and qualified personnel. If your Power Supply needs
calibration, contact your local Amada Weld Tech service representative, or contact our service department
at the address, phone number, or e-mail address listed under
Contact Us
in the front of this manual.
Electrode Maintenance
When a welding schedule has been suitable for a particular welding application over many welds, but poor
quality welds are now resulting, electrode deterioration could be the problem. If you need to increase
welding current to maintain the same weld heat, the electrode tip has probably increased in surface area
(mushroomed), effectively decreasing weld current density, thus cooling the weld. Try replacing the
electrodes.
The rough surface of a worn electrode tip tends to stick to the work pieces. So, periodic tip resurfacing
(dressing) is required to remove pitting, oxides and welding debris from the electrode. You should limit
cleaning of an electrode on the production line to using a # 400-600 grit electrode polishing disk. If you
must clean a badly damaged tip with a file, you must use a polishing disk after filing to ensure the electrode
faces are smooth.
The best method of preventing electrode problems is to regularly re-grind electrode tip surfaces and shapes
in a certified machine shop.
Parts Replacement
There are no user-serviceable parts inside the power Supply.
