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6
MAINTENANCE
6.1
General
Note:
All warranty undertakings given by the supplier cease to apply if the customer
attempts to rectify any faults on the machine during the warranty period.
N.B. Before starting any repairs the mains voltage must be disconnected.
For the maintenance of A2--A6 Process Controller, see instruction manual
0443 745 XXX.
6.2
Daily
Keep the moving parts of the welding head clean.
S
Make sure contact nozzles, hoses and electric cables are properly connected.
S
Make sure all bolted joints are tightened and that the conduit and the feed rollers
S
are not worn or damaged.
Check the braking torque of the brake hub. It should not be so low that the drum
S
continues to rotate when the wire feed is stopped, and not so high that the feed
rollers slip. As a guide, the braking torque of a 30 kg wire drum should be 1.5
Nm.
Adjusting the braking torque:
Set the locking button (2) in locked
S
position.
Adjust the springs of the
S
hub by way of a
screwdriver.
Turning the springs (1) clockwise
S
reduces the braking torque.
Turning the springs anticlockwise increases the braking torque.
S
NOTE! Turn the springs by the same amount.
6.3
Periodic
Inspect the gas nozzle and clear it regularly of welding spatter.
S
Inspect the slides and lubricate if the they are binding.
S
Inspect the wire conduit, the feed rollers and the contact nozzle of the wire feed
S
unit. Replace worn or damaged parts (for spare parts, see page 191).
Blow the wire conduit clean at regular intervals and clean the gas nozzle.
S
For trouble--free wire feed the wear parts of the feed mechanism should be clea-
S
ned and replaced at regular intervals.
NOTE that too hard pre--tensioning can lead to abnormal wear of the pressure
roller, feed roller and wire conduit.
fha8m1ea
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