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15.4 WELDER MECHANICAL PROBLEMS
Table 4
Trouble
Weld could not be made. Jaws do not
move.
Weld area melts when weld switch is
pushed.
Blade cannot be tightly clamped with
the clamp jaws.
Annealing doesn't occur when anneal-
ing button is pushed.
Annealing button will not return to
correct position after release.
Grinder will not run when Grinder
switch is pushed.
22
Probable Cause
Wire connection is poor; connecting
point of welding switch is bad.
Transformer burned out.
Blade has oil on it.
Blade ends have rust.
Welding switch is cutting off late.
Welding press too weak.
Jaw movement too slow.
Clamp jaws are out of order, or de-
cayed.
Lower jaw inserts are out of order.
Annealing switch connection is poor.
Fuse blown.
Annealing button has dust or debris
around it.
Grinder motor is burnt out.
Grinder switch is bad.
Remedy
Change switch, or grind the connect-
ing port with a fi le.
Change transformer, or rewire it.
Wipe off any oil.
Grind off rust.
Screw welding switch connecting nut
tighter.
Rotate pressure selector knob accord-
ingly.
Put some oil on rear side of welding
lever and the two jaws.
Replace clamp jaws.
Replace lower jaw inserts.
Replace annealing switch.
Replace fuse.
Remove annealing button housing and
clean out any dust or debris.
Change grinder motor or rewire it.
Replace grinder switch.
Vertical Band Saw
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