6.1 Tensioning the blade
The blade tensioning knob should be used to increase or
decrease tension (See Fig. 6.1). The only accurate way to
check a blade is with a tension meter. These are very expensive
so most users may need another method. The blade tension
indicator which is located inside the main top housing of the
bandsaw. This should be used first, as a guide to the correct
tension. We then suggest testing the tension by the amount
the blade will deflect sideways. First set the guides to 6 inches
above the table, making sure the saw is turned off push the
blade sideways with a reasonable amount of pressure using
the index finger. When pushing with the index finger a correctly
tensioned blade should not move more than a 1/4" sideways
(See Fig. 6.1A).
However perhaps the most tried and tested way of blade
tensioning is simply: If the bandsaw is cutting accurately then
the blade is tensioned correctly, if the blade tends to wander
and an accurate cut cannot be achieved then the blade tension
needs adjusting.
If the machine is to stand idle for a period it is good practice to
slacken tension and re-tension when next using. On the BS300
the simplest way to release and re-tension the blade is to use
the cam handle located on the back on the machine.
6.2 Tracking the Bandsaw blade
Isolate the machine from the supply by unplugging the mains
plug. Set the tracking of the blade before setting the blade
guides. Once the blade is tensioned, track the blade by turning
the upper bandwheel by hand and adjusting the tracking knob
(See Fig.6.2). By turning the tracking knob clockwise the blade
will move towards the back of the bandwheel, by turning the
tracking knob anti-clockwise the blade will move to the front of
the bandwheel. The blade should run as close to the centre of
the bandwheel as possible, as shown (See Fig.6.3). On 1/4",
3/8" and 1/2" blades it may be necessary to run the blade to
rear of the bandwheel. After the blade is tracked in the desired
position on the bandwheel, rotate the wheel several more times
by hand without any further adjustment ensuring that the blade
remains in the same position. Once this has been achieved lock
the tracking knob with the winged nut (See Fig.6.2).
Fig.6.2
Fig.6.3
TRACKING KNOB
6. Bandsaw Blade Set Up
Fig.6.1
BLADE TENSIONING KNOB
BLADE TENSION INDICATOR
Fig.6.1A
CAUTION!
Before carrying out any adjustments or maintenance
ensure that the machine is isolated and disconnected
from the electricity supply.
CAM HANDLE
16 17
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