Expressweld MasterMIG 250CT
Pore Creation
Possible Reasons:
1.Insufficient gas shielding.
2.Used gas is dirty or gas flow speed is not suitable.
3.Surface of welding wire is dirty.
4.Work piece is dirty.
5.Voltage value is too high.
6.Distance between the nozzle and workpiece (free wire length) is too much.
Solutions:
Insufficient Fusion
Possible Reasons:
19 Failures in Welding Seams
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1. To remove all air within the welding area, increase the gas flow rate. To prevent the
entry of turbulence and air into welding seam, do not set the flow rate to an
extremely high value. Clean splashed burr particles from nozzle. Prevent leakages in
the gas hose. Stop air flows that directly reach to arc (operating fans, open doors,
etc). When welding with C02 gas, to prevent clogging of the regulator due to freezing
use heater or connect several gas cylinders to each other. Decrease the advancing
speed. Decrease the distance between nozzle and workpiece. Until molten metal
become solid, keep the torch at the end of the welding seam.
2. Use a quality gas manufactured for welding. Adjust the gas flow rate.
3. Only use clean and dry welding wire.
4. Remove all oil, grease, rust, paint and dirt from workpiece surface. Use a welding
wire that contains more oxide solvent element.
5. Decrease the voltage value.
6. Shorten the length of free wire (at nozzle outlet).
1. There is coating or excessive oxide layer on the surface in welding area.
2. Heat input is insufficient.
3. Welding puddle is bigger than required.
4. Applied welding technique is wrong or movement given to the torch is not stabile.
5. Seam combination style is wrong.
6. Advancing speed is too high.
