Palmgren 9683122 Operating Manual & Parts List Download Page 6

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Palmgren Operating Manual & Parts List 9683122 & 9683123

OPERATION (CONTINUED)

TOOTH SPACING

Refer to Figure 7.

1. Approximately 1/8” of blade will be consumed during the welding
process. This blade loss must be taken into account.

2. All blades must have some of the teeth ground off so that the
tooth spacing will be uniform after welding.

3. Tooth grinding procedure must be done carefully in order to
grind the proper number of teeth and not to grind below gullet
which would weaken the blade.

Figure 7 – Tooth spacing (TPI = teeth per inch).

BLADE WELDING

Refer to Figure 8.

1. To set weld pressure adjustment knob, turn the knob counter-

clockwise to increase the pressure. The pressure adjustment
knob controls force applied to the movable jaw.

NOTE:

Weld pressure adjustment knob must be reset to “0” after

each welding.

2. Wider blades and thicker blades need more weld pressure to

force the blade ends together during welding. If too little pres-
sure is applied, the blade ends will melt. Too much pressure may
cause the blades to overlap.

For example, for 1/2" wide blades, turn the pressure adjustment

knob counterclockwise until the pointer is at 6 (See Figure 8).

Figure 8 – Weld Pressure Adjustment

3. If blade melts, increase pressure. If there are "blow holes" in the

weld, increase pressure.

4. If blade overlaps, decrease pressure.

5. Wider blades need more pressure and thinner blades need less

pressure. Weld pressure is also affected by blade material.

WARNING

: Welding operation produces sparks at blade intersec-

tion. Step away to left side of welder during welding operation.

WARNING

: Always wear ANSI approved safety glasses during weld-

ing. Sparks from welder can cause serious injury to eyes.

6. Press weld button and hold down. The blade ends will become

red hot and soft. The movable jaw will force the blade ends to-
gether creating a bead of metal and the limit switch will auto-
matically cut power to jaws.

7. Release weld button and wait 10 seconds to allow blade to cool.

8. Reset weld pressure adjustment to “0”.

9. Heat build-up in the tool can cause serious damage to the tool.

Allow transformer to cool down to room temperature between
each welding or each annealing operation. It is a safe procedure
to let the transformer be idle for at least 3 minutes between suc-
cessive welding/annealing operations.

BLADE ANNEALING

1. After the blade has been welded, the weld area will be very hard

and brittle. Before the blade can be used, it must be annealed
and the flash removed.

2. The blade weld is annealed by heating the blade just under the

melting temperature and then slowly cooling the weld.

NOTE:

Reset weld pressure adjustment knob to “0” prior to anneal-

ing. Failure to do so can cause damage to transformer.

3. Press the anneal button until the weld area glows a cherry red

and then release the anneal button.

CAUTION

: The blade weld will melt, destroying the weld, if the an-