Table of Contents
Advertisement
7. MAINTENANCE
7.1.
WIRE FEED UNIT Check the wire feed unit at regular intervals. The feed roller wire guide plays an important part in obtaining consistent
results. Poor wire feed affects welding. Clean the rollers weekly, especially the feed roller groove, removing all dust deposits.
7.2.
TORCH Protect the torch cable assembly from mechanical wear. Clean the liner from the machine forwards by using compressed air. If
the liner is clogged it must be replaced.
7.3.
CHANGING FEED ROLLER (See Section 4.12)
7.4.
CONTACT TIP The contact tip is a consumable item and must be replaced when the hole becomes enlarged or oval. The contact
tip MUST be kept free from spatter to ensure an unimpeded flow of gas. Refer to fig.11 and section 3.9 for removal and replacement.
7.5.
GAS CUP The gas cup must also be kept clean and free from spatter. Build up of spatter inside the gas cup can cause a short circuit
at the contact tip which will result in either the fuse blowing on the printed circuit card, or expensive machine repairs. To keep the contact
tip free from spatter, we recommend the use of Sealey anti-spatter spray (MIG/722308) available from your Sealey stockist. Refer to
fig.12 and section 4.9 for removal and replacement.
7.6.
REPLACING THE LINER Wind the wire back on to the spool and secure it. Unscrew the torch from the machine and undo the brass nut.
The liner should now be visible. Pull it out and replace with a new one.
8.
TROUBLESHOOTING
t
PROBLEM
1. Power source stops
2. No weld current
3. No weld current
4. Feed motor not working, lamp is
on
5. Wire does not feed, feed roller
rotates
6. Wire feeds unevenly
7. Unstable arc
8. Porous weld
9. Electrode sticking in gas cup
(nozzle)
10. Irregular weld bead
11. Weld bead too narrow and
raised
12. Weld bead too wide
© Jack Sealey Limited
r
POSSIBLE CAUSE
Overheating protection activated due
to overload
Rectifier blown
Bad connection between clamp &
workpiece
Break in earth lead
Break in torch lead
Gear damaged or worn
Motor defective
Pressure roller improperly adjusted
Dirt, copper, dust, etc, has collected
in torch liner
Gas cup (Nozzle) or tip defective
Deformed wire
Dirt, etc, in liner
Gas cup (Nozzle) or Tip defective
Gas cup (Nozzle) spattered
Feed roller groove clogged
Feed roller groove deformed
Pressure roller tension improper
Incorrect settings
Impurities in weld area
Worn or defective gas cup (nozzle)
No gas
Gas cup clogged
Draft blowing away shielding gas
Rusty or dirty joints
Torch too far from or at wrong angle
to work
Gas leak
Faulty Electrovalve
Worn or defective gas cup (nozzle)
Electrode deformed
Wire speed too slow
Torch incorrectly held
Wire weaving in weld pool
Weld current too low
Weld speed too high
Weld current too high
Weld speed too low
Arc too long
Original Language Version
REMEDY
Protection automatically resets when transformer has cooled
(about 15 min)
Replace rectifier
Clean or grind contact surface and weld area
Repair or replace earth lead.
Repair or replace torch
Replace gears. (Contact service agent)
Replace motor (Contact service agent)
Adjust tension
Clean the liner from the machine forward. Use compressed
air. If too much dirt, replace the liner.
Replace gas cup (nozzle) and/or tip. (Section 3.9.4 to 3.9.7)
Check roller tension and adjust it if necessary (Section 3.10)
Clean the liner from the machine forward. Use compressed
air
Replace gas cup (nozzle) and/or tip. (Section 3.9.4 to 3.9.7)
Clean or replace gas cup (nozzle) (Section 3.9.4 to 3.9.7)
Clean feed roller. (Section 3.12).
Replace feed roller. (Section 3.12)
Adjust tension. (Section 3.10)
Check settings. (Section 4)
Clean and/or grind workpiece. (Section 4.1.1)
Replace gas cup (nozzle). (Section 3.9.4 to 3.9.7)
Open gas cylinder, regulate gas flow
Clean or replace cup. (nozzle) (Section 3.9.4 to 3.9.7)
Screen off welding site or increase gas flow
Clean and/or grind workpiece. (Section 4.1.1)
The distance from gas cup to workpiece should be 8 to 10mm
Check hoses, connections and torch assembly. (Section 3.5).
Press the gas cup in correction position
Clean out or replace
Replace gas cup (nozzle). (Section 3.9.4 to 3.9.7)
Check roller tension. (Section 3.10)
See recommendations for wire speed
Use correct torch angle
Check roller tension and adjust as needed. (Section 3.10)
Increase power and wire speed. (Section 4)
Move torch slower and weave a little more
Decrease power and wire speed. (Section 4)
Move torch faster and weave less
Bring torch closer to workpiece
Supermig180.V4 Issue:1
23/03/22
Advertisement
Table of Contents
