Weldmatic 270C
Model No CP136-2, Iss A 08/12
9
Wirefeeder Controls on Inside Panel
Pre Gas Control
Sets the time period of gas flow from gun
switch on until welding commences, and can
be set for 0 – 2 seconds.
Post Gas Control
This sets the time period of gas flow after
welding ceases, and can be set for 0 – 2
seconds.
Spot Time Control
When the setting is other than fully anti
clockwise, the welder will operate for a short
time after each trigger press. Turn clockwise
to increase the weld duration up to a
maximum of 5 seconds.
Burnback Control
This control sets the time period that welding
voltage continues after the gun switch is
released, and wirefeed ceases. The extra time
allows the wire to ‘Burnback’ slightly toward
the tip.
When set correctly ‘Burnback’ prevents the
welding wire freezing in the weld pool at the
end of a weld.
Fig 2
Controls inside wirefeeder
5 Installation
Connection to Electrical Mains Power
Supply
NOTE
. All electrical work shall only be
undertaken by a qualified electrician.
The Weldmatic 270C is factory fitted with
a 3 metre, 3 core 2.5 mm
2
Heavy Duty PVC
mains power supply cable with moulded
3 pin, 15 Amp, Single Phase plug.
15 Amp Supply Limited Output
To operate the machine with the 15 Amp
plug from a 15 Amp mains supply, the output
of the machine needs to be limited, so as not
to exceed primary current Ieff 15 Amp.
A Weld voltage selection of D-1, and
operation at 22% duty cycle (i.e. 2 min 12 sec
on, 7 min 48 sec off) will maintain an effective
input current Ieff of 15 Amp.
The output will be limited to 200 Amp (based
on conventional load). The maximum input
limited to 32 Amp.
A 15 Amp socket outlet installation, typically
supplied with a 20 Amp "C" curve circuit
breaker, will be able to safely supply this.
Maximum Rated Output
To achieve the rated output of 270 Amp,
20% duty the machine requires maximum
primary current Imax 56 Amp and effective
primary current Ieff 24.2 Amp.
The machine needs to be fitted with a plug
of 25 Amp capacity or greater, and a supply
circuit capacity of 25 Amp or greater.
The minimum recommended supply circuit
breaker rating for a Weldmatic 270C is
25 Amps. For Australian and New Zealand
installation a 32 Amp plug is the closest
suitable size. The supply circuit will also need
to be rated at 32 Amp.
Содержание WELDMATIC 270C
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