Jet J-420, Инструкция по эксплуатации и каталог запасных частей

Страница: 8 / 36

8
6.0 Operating instructions
These sanders can be used to remove stock from a
wide variety of machinable materials. Different
materials require different grit types and grades to
achieve the desired stock removal rate and surface
finish. Please consult with your abrasive materials
supplier for specific recommendations on the correct
grit material and grade required for your specific
needs.
When removing stock from soft materials (wood,
plastic, etc.) these machines are typically called
"sanders." When removing stock from hard materials
(cast iron, steel, etc.) they are referred to as
"grinders". The word "sander" is used, more-or-less
consistently, throughout this manual. It refers to the
machines and not the type of abrasive finishing being
performed.
Before operating your sander, please read the basic
instructions on safe machine usage on the preceding
pages.
6.1 Belt sander
The sanding belt must be in good condition, at proper
tension, and tracking correctly, before doing any
sanding, grinding or other abrasive machining
operations. Refer to the section on Track Mechanism
Maintenance if you have any problems with belt
tension or tracking.
6.2 Adjusting the belt sander table
You can tilt the table in a range between 20° upward
and 45° downward. A single locking handle on the
side of the table is used to lock and unlock the table
to permit adjustment.
There are two positive lock stop positions: at 90° (that
is, at a right angle to the platen) and at 45° downward
(essentially 90° + 45° or 135° total to the platen.)
Never adjust the table angle
while the sander is running. Always turn the
motor off before adjusting the table angle.
To Tilt the Belt Sander Table:
1. Unlock the locking handle on the side of the
table.
2. Using the pointer and scale, set the angle to any
required angle between 20° upward and 45°
downward.
3. Lock the lock handle.
To Tilt the Table to Exactly 45
o
:
1. Flip out the stop bracket (see Figure 20).
2. Unlock the locking handle.
3. Move the table until it contacts the stop bracket.
4. Lock the table lock handle.
Figure 1: Locking handle for belt table
6.3 Using the indexing lock handle
The lock handle (Figure 1) is spring loaded and can
be repositioned on its shaft to permit easy locking and
unlocking.
To Reposition the Handle:
1. Pull outward against its spring.
2. Rotate the handle to the position you require.
3. Release the handle and its spring will return it to
the correct operating position.
6.4 Adjusting the belt sander arm
The arm which holds the sanding belt can be
positioned at a full vertical position, a full horizontal
position, or at any angle in between which is
convenient to the type of sanding you are doing.
A positive stop mechanism is used to permit quick
adjustment to the vertical or horizontal positions.
Never adjust the arm angle
while the sander is running. Always turn off the
motor before adjusting the arm angle.
To adjust to vertical:
1. Unlock both lock bolts. These are located under
the arbor cover.
2. Move the arm to vertical until it contacts its stop.
3. Tighten both lock bolts, and replace arbor cover.
Figure 2: Lock bolts for belt arm