iWeld HEAVY DUTY 315, Руководство пользователя

Страница: 28 / 36

3-4. Duty cycle & Over heat
Strictly to apply the maximum working time (see technical specifications). If you go
beyond this period, the machine suddenly stop. This is possible due to the internal over-
load because the machine overheats. In this case, it is not necessary to turn off the
machine, the fan should be working to reduce the temperature. Usually within 5-10
minutes the machine working again.
66
44
20
0 600 I
2
（ A ）
U
2
（
V
）
3-5. Volt-Ampere Characteristic
A Heavy Duty swelders have excellent volt-ampere characteristic, seeing the follow-
ing graph.
In MMA welding, the relation between the rated loading voltage U2 and welding cur-
rent I2 is as follows:
When I
2
≤600A then U
2
=20+0.04 I
2
(V) When I
2
>600A thenU
2
=44(V)
3-2 Functions
- Hot Start : This function briefly increases the arc welding current arc ignition thereby
facilitating the cold electrode.
- Arc Force: MMA mode when the arc length varies , the voltage is changing and at
some point reach a critical value, when the power of the arc is not appropriate to
maintain the melt . Then suddenly the automatic increases or decreases the current
is enough to maintain the melt . The controller can change the intensity of control .
EN
28