How to Check for Overload in an Ultrasonic Metal Welding Generator? When the generator emits an overload alarm, follow these steps for inspection:

1. If the no-load test shows normal operating current, it may indicate that the welding tip is contacting an unintended object or there is a fault in the parameter adjustment between the welding tip and the welding seat.

2. When an unloaded test is abnormal, first inspect if the welding tip has cracks or if the installation is secure. Then, remove the welding tip to conduct the unloaded test again, to rule out issues with the transducer and the variable amplitude rod. Proceed with elimination steps. After excluding the possibility of a fault with the transducer and variable amplitude rod, replace the welding tip with a new one to determine the issue.

3. Sometimes, a no-load test may pass normally but the equipment fails to operate correctly. This could be due to internal changes in components like the welding tip or acoustic elements, leading to poor transmission of acoustic energy. Here's a simple method to determine this: the hand touch method. A welding tip or actuator in normal operation has a very even amplitude, feeling silky smooth to the touch. When there's poor transmission of acoustic energy, you may feel bubbles or burrs when touching it. In such cases, it's necessary to use the elimination method to identify and exclude faulty components.

When the generator is malfunctioning, the same situation can occur. Normally, when checking the transducer's input waveform, it should be a smooth sine wave. The presence of spikes or abnormal waveforms on the sine wave can also cause this phenomenon. In such cases, replacing the entire branch of the acoustic element can be used to distinguish.