27
Over-Load, Over-Temp (Over-Heat), and Duty-Cycle
Fig. 37
The Pro Pulse 300 is designed for production welding of thin and medium material thicknesses and repair jobs of almost
any material thickness. It has the ability to weld a lot of different materials and a great variety of material thicknesses.
Thicker material, typically 1/2” and up, depending on type, temperature, etc. may require multi-pass welds.
Duty-cycle ratings can be confusing, but we want to make duty-cycle less confusing. An 80% duty-cycle means that, out
of a 10-minute time span (duty-cycle is always a 10-minute time span, per definition, and this never changes), the
machine can weld for eight (
8
) minutes and then needs to idle with the cooling fan running for two (
2
) minutes. Do not
turn off or unplug the machine during this time.
However, these numbers change with the selected welding amperage and the ambient temperature. In reality, very few
can keep track of welding time like this, so we equipped the Pro Pulse 300 with a highly sophisticated over-heat
protection. The machine monitors the temperature of several vital internal components. Just before temperatures venture
outside the safe operating range, the machine displays a message to the operator, the cooling fan continues to run, and the
welding output is shut down for four (
4
) minutes. This time allows the machine and internal components to cool down to
a safe operating temperature. There is no harm to the machine when the message is displayed, and it does not matter how
often this happens. There is no way to override this function.
The Pro Pulse 300 is a machine in the 300 amp class; it is designed for welding operations up to 300 amps in TIG and
Stick mode and up to 320 amps in MIG and pulsed MIG mode. Depending on the selected program and the welding
material, the peak pulse can be as high as 600 amps (
Note:
This will not show in the display; the display shows an
average amperage, comparable to a classic MIG machine). If its capabilities are exceeded, the machine automatically
lowers the settings for protection purposes. This happens only rarely in pre-programmed synergic and pulse programs,
but it can happen due to CTWD, unclean metal, or wire that is out of specifications (e.g., too big in diameter). In the case
of the machine lowering the settings automatically, you will be informed via the LCD. The machine will keep welding
but the welding parameters will lower, the wire speed symbol changes from black to red, and the value (number in IPM)
for the wire speed flashes black and red (normally, the value is shown in sold black). The LCD will also display the
following: OVER CURRENT PROTECTION. There is no harm to the machine when this happens, and you can actually
continue welding at the lower settings. To avoid this, you should correct the problem and/or select new, slightly lower
settings than you previously set.
Summary of Contents for Pro Pulse 300
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