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5.10.
adjusting blade tension. fig.9
warNiNG! to avoid accidental starting which could result in serious
‰
injury, turn the saw off, and unplug from the power source.
5.10.1.
to release initial tension,flip the blade tension lever over.
5.10.2.
turning the blade tension wheel anticlockwise decreases (or loosens)
blade tension.
5.10.3.
turning the blade tension wheel clockwise increases (or tightens)
blade tension.
Note: You can adjust blade tension at any time. check tension by the
sound the blade makes when plucked like a guitar string.
5.10.4.
Pluck the back straight edge of the blade while turning the tension
adjusting.
the sound should be a musical note. the sound becomes less flat
as tension increases.
the sound level decreases with too much tension.
5.10.5.
flip the tension lever back over centre to re-tension the blade.
Note: Be careful not to adjust the blade too tight. Too much tension may
cause the blade to break as soon as you start cutting. too little tension
may cause the blade to bend or break before the teeth wear out.
Fig.9:-
A. tension leVer
B. BLADE TENSION ADJUSTMENT WHEEL
5.11.
Fitting blades
scroll saw blades wear out quickly and must be replaced frequently for
optimum cutting results. expect to break some blades while you learn
to use and adjust your saw. Blades usually become dull after 1/2hour
to 2hours of cutting, depending on the type of material and speed of
operation.
5.12.
removing the saw blade:
5.12.1.
turn off the saw and unplug it from the power source.
5.12.2.
turn the blade tension wheel anticlockwise to decrease (or loosen)
blade tension. fig.9
5.12.3.
Pushing up from under the saw table, remove the throat plate.
5.12.4.
loosen both the upper and lower blade clamp screws with the t-handle
hex key or by hand.
5.12.5.
Pull up on the blade and push down on the saw arm to disengage the
upper pins from the V-notch of the upper blade holder. Pull the blade
downward to disengage the lower pins from the V-notch of the lower
blade holder.
5.12.6.
Place the new blade through the opening in the saw table with the
teeth to the front of the saw and pointing down towards the saw table.
the pins on the blade fit into the V-notch of the lower blade holder.
5.12.7.
Pull up on the blade and press the upper arm down to position the pins of the blade in the V-notch in the upper blade holder.
5.12.8.
securely tighten the upper and lower blade clamps with the t-handle hex key or by hand. turn the blade tension wheel clockwise until
the blade has the desired amount of tension.
5.12.9.
replace the throat plate.
Note: If the blade touches the drop foot on either side, then the drop foot must be adjusted. See section on Adjusting the Drop Foot, 5.9.
6. operatioN
6.1.
initial operation
Note: Before starting a cut, turn the saw on and listen to the sound it makes. If you notice excessive vibration or an unusual noise, stop
the saw immediately and unplug it. do Not restart the saw until you have located and corrected the problem.
Note: After the saw is turned on, a hesitation before blade movement is normal.
6.1.1.
there is a learning curve for each person who uses this saw. during that period of time it is expected that some blades will
break until you learn how to use and adjust the saw correctly. Plan the way you will hold the work piece from start to finish.
6.1.2.
Keep your hands away from the blade. do Not hand hold pieces so small that your fingers would have to go under the drop foot.
6.1.3.
Hold the work piece firmly against the saw table.
6.1.4.
the blade teeth cut the work piece only on the down stroke. use gentle pressure and both hands when feeding the work piece into the
blade. do Not force the cut.
6.1.5.
Guide the work piece into the blade slowly because the blade teeth are very small and can only remove material on the down stroke.
Avoid awkward operations and hand positions where a sudden slip could cause serious injury from contact with the blade.
Never place your hands in the blade path.
for accurate wood cuts, compensate for the blades tendency to follow the wood grain as you are cutting. use extra supports (table,
blocks, etc.) when cutting large, small or awkward work pieces.
never use another person as a substitute for a table extension or as an additional support for a work piece that is longer or wider than
the basic saw table.
When cutting irregularly shaped work pieces, plan your cut so the work piece will not pinch the blade. Work pieces must not twist, rock
or slip while being cut.
6.2.
Jamming of saw blade and work piece
When backing out the work piece, the blade may bind in the kerf (cut). this is usually caused by sawdust clogging the kerf or by the
blade coming out of the blade holders. if this happens:
6.2.1.
Place the switch in the off position.
6.2.2.
Wait until the saw has come to a full and complete stop. unplug the saw from the power source.
© Jack sealey limited
Original Language Version
fig.8
fig.9
sm1302.V2 | issue 3(i) 14/06/17
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