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increased. Therefore, once the ideal speed is achieved by fine

tuning, it should not be necessary to adjust this control when the

welding current is changed.

NOTE: Listen to the sound made. An irregular crackling sound denotes

too high a wire speed. Decrease the speed until a regular, strong

buzzing sound is heard.

THERMAL OVERLOAD

The ‘Thermal Overload’ shuts off the

welder when it becomes too hot,

due to the duty cycle being

exceeded. This is to prevent any

damage to the machine.

When this occurs, the warning lamp

shown will light up. Allow the welder

to cool until the amber light

extinguishes before resuming work.

DUTY CYCLE

This welder is covered by regulations where the duty cycle is expressed as a

percentage of time the machine may be used in a given period for a

specified welding current.

e.g. when welding at 40 amps the machine may be used for 6 minutes (60%)

in any 10 minute period.

The duty cycle determines the machine ‘down time’. i.e 10% means 1 minutes

operation followed by 9 minutes of rest. The duty cycle must be adhered to, to

prevent the thermal cutout protection from activating.

Do not exceed the stated duty cycle for this machine. Failure to heed this

warning may invalidate your warranty.

Duty Cycle (%)

10

60

Rated Welding Current (A)

100

40

Conventional Load Voltage (V)

19

16