Control method for MIG/MAG-welding and welding equipment applying this method

Welding equipment for MIG/MAG welding, comprising:

• a weld torch holding an electrode having an electrode end adapted to be fed to a position in proximity to a workpiece;
• a welding machine adapted to supply energy to the electrode;
• a regulator including software and hardware components operable for causing the regulator to:
• measure a short-circuiting time duration based on an occurrence of a short circuit between the electrode and the workpiece;
• measure an arc time duration based on an occurrence of an arc between the electrode and the workpiece;
• and
• sum the arc time duration and the short-circuiting time duration to form a period time duration;
• and
• a process regulator adapted to control energy supplied to the electrode by:
• determining whether the period time duration exceeds a threshold value;
• in response to determining that the period time duration exceeds the threshold value, decreasing the energy supplied regardless of a short-circuiting percentage;
• in response to determining that the period time duration does not exceed the threshold value:
• increasing the energy supplied in response to the measured short-circuiting time duration, as a percentage of the period time duration, exceeding a defined adjustable set value, and
• decreasing the energy supplied in response to the short-circuiting percentage being less than the set value.

A control method for MIG/MAG-welding with presence of short-circuiting droplets between an electrode end and a workpiece, the method comprising:

• measuring a short-circuiting time duration between the electrode end and the workpiece;
• measuring an arc time duration between the electrode end and the workpiece;
• calculating a period time duration by summing the arc time duration and the short-circuiting time duration;
• determining a short-circuit percentage as a ratio of the short-circuiting time duration over the period time duration;
• determining a difference between the short-circuit percentage and a set value;
• and
• generating an output signal to control energy supplied to the electrode based at least in part on the difference between the short-circuit percentage and the set value, by:
• determining whether the period time duration exceeds a threshold value;
• in response to determining that the period time duration exceeds the threshold value, decreasing the energy supplied regardless of the short-circuiting percentage;
• in response to determining that the period time duration does not exceed the threshold value:
• increasing the energy supplied in response to the determined short-circuit percentage exceeding the set value;
• and
• decreasing the energy supplied in response to the determined short-circuiting percentage being less than the set value.