Removing Teeth; Welding - Jet VBS-1610 Operating Instructions And Parts Manual

IMPORTANT: If a blade has been cut by using
snips, the ends of the blade must be ground
square before welding them together, as shown in
Figure 12.
Figure 11
Figure 12

12.2 Removing Teeth

In fine pitched blades, one or more of the teeth on
each side of the cut may need to be removed by
grinding so that the weld area of the blade is
uniform and the teeth will be uniformly spaced. See
Figure 11, and refer to section 12.5 Blade grinding.

12.3 Welding

The welder is designed for
intermittent use. Repeated welding within a
short period of time may cause welder to
overheat.
1. Clean welder jaws and lower jaw inserts.
2. Carefully clean ends of blade which will
contact welder jaws. Remove any dirt, oil,
scale and oxide.
Any rust (oxide) on blade in
vicinity of weld must be ground off before
blade can be welded.
3. Turn pressure knob (Figure 13) to "0" position
(pointed downward). NOTE: There will be
some resistance when turning knob.
4. Insert one end of blade into left clamp. Position
back edge of blade against back edge of left
clamp. Then position the end of the blade
midway between left and right clamps. Tighten
left clamp.
5. Insert opposite end of blade into right clamp.
Position back edge of blade against back edge
of right clamp. Then butt the end of blade
against the other end of blade (the blade ends
need to be in contact with each other). Tighten
right clamp.
6. Set pressure selector switch (counterclockwise
rotation) to the approximate setting required
for the width of the blade being welded.
Keep hands clear of weld area
and clamp jaws during welding.
7. Press and hold weld button (Figure 13). When
weld button is pushed, the left clamp moves to
the right to apply pressure to the blade ends.
Simultaneously, sparks will be emitted from the
blade ends as they are being welded. Do not
release weld button until blade joint is "red
hot."
8. Release weld button, and wait 3 or 4 seconds
until blade returns to original color. Unclamp
blade.
9. Rotate pressure selector switch back to "0".
10. Remove blade from clamps, and carefully
inspect it. The spacing of the teeth should be
uniform and the weld should be located in
center of gullet. Misalignment is easily noted at
this time from the weld appearance. See
Figure 14 for examples of incorrect welds.
11. If the weld is imperfect, refer to section 15.3 for
possible remedies to any problems. Make
corrections before annealing.
12
Figure 13