Maintenance And Inspection - Jet JWBS-24 Operating Instructions Manual

Fig 14
7.6 Blade Speed adjustment
The bandsaw will operate at 500 or
1000 m/min (Fig 15)
1000 m/min
For standard cutting operations.
500m/min
Gives higher blade force, for high rip
cuts and cutting hard wood.
Fig 15
To change the speed:
Disconnect machine from power
source.
Loosen the four hex nuts (A, Fig 16)
on the motor plate.
Fig 16
Use the tension screw (B) to release
the belt tension.
Slide the belt onto the appropriate set
of pulleys.
Re-tension the belt.
Pushing down with moderate pressure
at the centre of the belt should give a
deflection of approx 12mm (Fig 17).
Fig 17
Securely tighten all four hex nuts on
the motor plate (A).
7.7 Folding the bandsaw blade
Hold the bandsaw blade in one hand.
Let it hang down vertically and hold it
to the floor with a foot. Turn your hand
through 360° (a complete circle), as
you move it down towards the floor.

8. Maintenance and inspection

General notes:
Maintenance, cleaning and repair
work may only be carried out after
the machine is protected against
accidental starting by pulling the
mains plug.
Repair and maintenance work on the
electrical system may only be carried
out by a qualified electrician.
Clean the machine regularly.
Inspect the proper function of the dust
extraction daily.
All protective and safety devices must
be re-attached immediately after
completed cleaning, repair and
maintenance work.
Defective safety devices must be
replaced immediately.
Inspect the correct blade tension
regularly. Take away the blade tension
if the machine is not in use for a
longer time period.
Inspect the blade guide adjustment
regularly.
Check bandsaw blades regularly for
faults. Replace a defective sawblades
immediately.
8
Wheels:
The rubber tyre of the wheels must be
cleaned regularly.
The upper wheel support must be
lubricated regularly.
Belt Tension:
The belt tension must be inspected
regularly.
Pushing down with moderate pressure
at the centre of the belt should give a
deflection of approx 12mm (Fig 17).
Belt Alignment:
The drive belt can be aligned with one
or more of the four set screws (Fig 18)
Fig 18
Place a straight edge against the face
of the pulleys to inspect.
Adjust the angle of the motor until the
drive belt is aligned (Fig 19)
Fig 19
Securely tighten all four hex nuts on
the motor plate (A, Fig 16).
Motor Break:
The motor break works electro-
mechanically (break motor).
If breaking time should exceed 10
seconds, the motor break assembly
needs to be replaced. Contact your Jet
service station immediately.