Charnwood W721 Provozní pokyny stáhnout pdf (Strana 11)

After ensuring that the quick tension lever is

set in the tensioned position, adjust the blade

tension with the hand wheel on top of the

upper housing.

‘Pluck’ the back of the blade, as you would

the string of a double bass, at this

point. As the blade tension is increased, the

pitch of the sound will rise. Stop increasing

the tension as soon as the sound starts to

become dull. Alternatively, raise the blade

guard to its highest position and adjust

tension until the blade, at the midpoint

between table and guard can be deflected

only 3 to 5 mm with finger pressure.

Turn the upper wheel clockwise, by hand and

adjust the tracking control until the blade is

centred on the wheel, as shown in the inset

illustration. Lock the adjuster in this position.

The upper and lower thrust and guide

bearings should be set up next.

Thrust bearing

Guide bearing

Guide bearing locking screws

Thrust bearing locking screw

The thrust bearing should be about 0.5 mm

behind the back of the blade. Adjust it and

lock it place.

Slacken the guide bearing locking screws,

move the bearings in until they touch the

blade. Rotate the top wheel by hand a few

turns and lock the be\rings in place.

The lower thrust bearing and guide pins are

adjusted similarly.

Guide pin locking screw (on rear face)

Guide pin

Lower thrust bearing

Blade guard

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