Spot welder troubleshooting
1, step foot pedal welder does not work, the power indicator is off:
a. Check if the power supply voltage is normal; check if the control system is normal.
b. Check if the foot switch contact, AC contactor contact, and split shift switch are in good contact or burned.
2, the power indicator light, the workpiece is not welded tight:
a. Check whether the pedal travel is in place and whether the foot switch is in good contact.
b. Check that the pressure lever spring screws are properly adjusted.
3, there should be no splash when welding:
a. Check if the electrode tip is seriously oxidized.
b. Inspect the welding workpiece for bad corrosion.
c. Check if the adjustment switch is too high.
d. Check if the electrode pressure is too low and the welding procedure is correct.
4, solder joints with severe indentation and extrudate:
a. Check if the current is too large.
b. Check the welding workpiece for unevenness.
c. Check the electrode pressure is too large, the electrode tip shape, cross section is appropriate.
5, welding workpiece strength is not enough:
a. Check if the electrode pressure is too low and check that the electrode rod is tight.
b. Check whether the welding energy is too small, whether the welding workpiece is seriously rusted, and the solder joints are in poor contact.
c. Check for excessive oxide between the tip and the electrode stem, the electrode stem, and the electrode arm.
d. Check whether the section of the electrode tip is increased due to wear and the welding energy is reduced.
e. Check for severe oxidation of the electrode and copper soft coupling and bonding surfaces.
6. Abnormal noise of AC contactor during welding:
a. Check whether the incoming voltage of the AC contactor is lower than the self-discharge voltage of 300 volts during welding.
b. Check if the power lead is too long, causing too much pressure drop on the line.
c. Check if the network voltage is too low to work properly.
d. Check if there is a short circuit in the main transformer and the current is too high.
7, welder overheating:
a. Check if the insulation resistance between the electrode holder and the body is bad, causing a partial short circuit.
b. Check whether the water inlet pressure, water flow, and water supply temperature are appropriate. Check whether the water system is contaminated with dirt, causing the arms, electrodes, and electrodes to overheat due to poor cooling.
c. Check whether the soft contact of the copper and the electrode arm, the contact surface between the electrode rod and the electrode tip is serious, and the contact resistance increases.
d. Check whether the section of the electrode tip is excessively increased due to wear, so that the welder is overloaded and generates heat.
e. Check whether the welding thickness and load continuation rate exceed the standard and overload the welding machine and heat up.