PATON
ProMIG
DC MMA/TIG/MIG/MAG
- 20 -
For welders, the pulse function in MMA can offer enhanced control, especially beneficial
when working with heat-sensitive materials or in scenarios where precise heat input is
paramount. Proper tuning of the pulse parameters like pulse frequency and the ratio
between peak and base currents can lead to improved weld quality, reduced spatter, and a
more desirable bead appearance.
It also can provide better control over the cooling rate, which can influence the weld's
metallurgical properties and reduce the risk of defects such as porosity and cracking. By
controlling the current and consequently the arc force, there can be a noticeable reduction
in spatter, which results in cleaner welds and less post-weld cleanup. Furthermore, when
welding in challenging positions such as vertical or overhead, the pulse current provides
superior control of the weld pool, mitigating risks of sagging or dripping of the molten metal.
To activate this function on the device, first you need to turn on the current pulse mode
[Po.P] - switch it from "OFF" to "ON" and set four parameters: peak current [I.iP], base
current [I.PS], pulse frequency [Fr.P] and peak-to-base ratio (or "duty cycle") [dut].
By default, the pulse frequency [Fr.P] and duty cycle [dut] are at the most common values of
5.0Hz and 50%, respectively. When the "duty cycle" parameter is changed from 50%, an
asymmetry is introduced between the peak current and the base current:
default "duty cycle" [dut] = 50% "duty cycle" [dut] = 20%
"duty cycle" [dut] = 70%
These parameters are set in different situations in different ways, depending on the welder's
requirements.
To change the value of any function in the current welding mode, see section 6.1.
Summary of Contents for PROMIG-160
Page 1: ...j...
