HOLZMANN MASCHINEN HBS 300J Manual De Instrucciones página 34

Tensioning the blade
 CAUTION! Remove the tension from the blade if the bandsaw is not going to be used for some
time. Be sure to re-tension the blade before you start the machine.
 Turn the tightening screw (9) for tensioning the blade (25) in a clockwise direction.
 The correct blade tension can be checked by applying pressure to the side of the blade with your
finger, somewhere in the middle between the two blade pulleys (7+8). You should only be able to
bend the blade (25) very slightly (approx. 1-2mm).
 CAUTION! The blade may break if the tension is too high. BEWARE IF INJURY! If the tension is
too low, the powered blade pulley (7) will spin while the blade does not move.
Adjusting the blade
 Undo the fasteners (13) and open the side cover (12).
 Turn the upper blade pulley (8) slowly in a clockwise direction. The blade (25) should run centrally
on the blade pulley (8). If it does not, the angle at which the upper blade pulley (8) tilts must be
adjusted.
 If the blade (25) runs more towards the rear of the blade pulley (8), i.e. towards the machine
housing (24), the setting screw (22) must be turned in an anticlockwise direction. Then turn the
blade pulley (8) slowly with the other hand to check the position of the blade.
 If the blade (25) runs towards the front edge of the belt pulley (8), the setting screw (22) must be
turned in a clockwise direction.
 After adjusting the upper blade pulley (8), check the position of the blade (25) on the lower blade
pulley (7). Again, the blade (25) should run in the middle of the blade pulley (7). When adjusting
the upper blade pulley you have to turn it several times until the adjustment has an effect on the
position of the blade on the lower blade pulley.
 When adjustment has been completed, close the side cover (12) again and secure it with the
fasteners (13).
Adjusting the blade guide (Fig. 11-13)
 Whenever you change the blade you must reset both the support bearings and the guide pins.
Upper support bearing (Fig. 11)
 The back pressure bearings (1) accept the feed pressure of the work piece. Set the upper and
lower back pressure bearing in such a way that it slightly touches the sawblade back. The distance
should be 0.5 mm.
Setting the lower support bearing
 Set the upper guide rollers (2) to the corresponding sawblade width. The front edges of the guide
rollers must not exceed the tooth base of the sawblade.
 When the guide rollers slightly touch the sawblade, tighten the screws.
Setting the upper guide bearings (Figure 13)
 Remove the table (15)
 Undo the screws.
 Move the mount of the guide bearings (29) so that there is a gap of approx. 1mm between the
front edge of the guide bearings and the gullet of the blade in front.
 Re-tighten the screws
 CAUTION! The blade will be rendered useless if the teeth touch the guide bearings while the blade
is running.
 Undo the screws
 Move the two guide bearings (29) towards the blade so that there is a gap of approx. 0,5mm
between the guide bearings (29) and the blade (25).
 Re-tighten the screws.
 Turn the upper blade pulley (7) several times in a clockwise direction.
Check the setting of the guide bearings again and re-adjust If necessary.
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ASSEMBLY
34
HBS 300J