according to the load, improper adjustment of the limit screw or the
moving stroke of the welding head exceeding allowable stroke of the
welder may result in the reduction of power output.
5. Occurrence of frequency deviation protection during welding.
a. Improper adjustment of frequency. Raise the frequency slightly, to
surmount the influence of frequency rising on the transducer system
under the action of pressure. Ensure stable degree of frequency
deviation with slight changes during welding.
b. Parameters of the components of transducer system are matchless,
which is generally caused by too high natural frequency of the acoustic
welding head.
c. Serious heating up of the transducer system.
d. Too high welding pressure.
6. The occurrence of overload protection during welding is mainly caused by
higher load. Generally, lowering the working pressure appropriately can
manage. Untight fixing of acoustic welding head or its rupture from vibration
may cause overload protection as well.
7. Unstable output of ultrasonic, and indication of high load but very faint
sense of ultrasonic vibration are mainly caused by the automatic tracking
system falling out of synchronism, with the following causes:
a. The working frequency deviates seriously, which causes the failure of
frequency tracking.
b. The transducer system is damaged seriously, or the parameters deviate
seriously.
c. Over high load while starting ultrasonic causes the failure of starting. At
this moment, shorten the delay time to bring the triggering mode under
the mode of advance triggering, or reduce the pressure to lower the
starting load.
8. The following cases may be caused by the faults of the transducer system,
especially the acoustic welding head.
a. High no-load current and unstable ultrasonic.
b. Particularly serious heating up of the welding head, and squealing of
the welding head while testing ultrasonic.
c. Constant frequency deviation protection or overload protection; invalid
frequency adjusting.
9. Un-smooth movement of the welder is mainly caused by lack of oil at the
