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Abstract
An experimental model of a voltage–frequency converter was realised and utilised for the control of the thermal behaviour by the laser welding of thermoplastic polymer materials. The input signal of 0–10 V comes from a thermal–optical real-time analysing device of the welding process. The output signal of 0–300 Hz is introduced to the input interface of a laser welding equipment, for setting the laser pulse frequency. Operation tests were performed on the laser welding equipment type HL 124P LCU. The pulses have rectangular waveform, with the amplitude of 20 V. The frequency is very stable, with deviations of less than 0.5 Hz. The waveform and the frequency response at the converter output are appropriate.
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