Expressweld MasterMIG 250CT
Solutions:
Insufficient Penetration
Possible Reasons:
1. Combination preparation is wrong.
2. Applied welding technique is wrong.
3. Heat input is insufficient.
Solutions:
Root Sagging
Possible Reasons:
1. Welding speed is too low.
2. Current is too high when compared to the voltage.
Page 34
1. Clean scale and oxide residues from all surfaces in the welding seam area.
2. Increase wire feed speed and arc voltage. Decrease free wire length.
3. To control welding puddle more easily do not perform over oscillatory welding.
Increase the advancing speed.
4. If you perform oscillatory welding, wait a moment at the edges of seam. Enhance
access to root of seam. Route the welding wire to the front of weld puddle. Adjust
torch angle at corner welding.
5. To enable access to seam soul, adjust combination angle properly. To fuse seam
corners, adjust free wire length or prepare (J) or (U) seam.
6. Decrease wire feed speed.
1. To access to the soul of seam, with the condition to provide correct free wire length
and arc characteristics, revise connection shape and connection preparation. Avoid
that the height in the root is extremely high. In butt joint welding, increase root
opening or deepen the groove opened reversely.
2. To achieve maximum penetration, hold the welding wire perpendicular to workpiece.
Route the arc to the front of weld puddle.
3. Current may be too low according to voltage. Increase the wire feeding speed, so the
current. Do not change the free wire length.
