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Feed Rate Control (G) – sets speed of bow
descent, i.e. amount of downward force that is
applied to workpiece. The feed rate is proportional
to the opening of the valve. Turn knob clockwise to
increase feed rate; counterclockwise to reduce feed
rate. When set to zero, bow is locked in raised
position.
Emergency Stop (H) – Press to instantly stop all
machine functions. To restart machine, rotate E-
stop button clockwise until it releases. (Note: For
normal stopping of blade use the (F) off button.)
Coolant Switch (J) – Turn knob to "I" to start
coolant flow. Turn to "O" to stop coolant flow. Flow
is regulated by the individual valves on the bow.
9.0 Operation
Refer to Figure 8-1.
9.1 General procedure
1.
Activate hydraulic motor (B).
2.
Set feed rate (G) to zero, and raise bow (C
3.
Make sure workpiece is secure within vise (D
and set for desired width of cut.
4.
Make sure left blade guide bracket is adjusted
as close as possible to left vise jaw.
5.
Turn selector switch (E) to manual or auto mode
(explained in step #8).
6.
Activate coolant flow (J).
7.
Press Start (F) to begin cutting cycle.
8.
Turn feed control (G) to desired rate. Bow will
descend until operation is complete.
Manual mode: Bow remains in down position.
Press and hold Bow Up (C
raised position.
Auto mode: Bow automatically returns to
raised position.
NOTE: Bow Up/Down and Vise Open/Close buttons
are rendered inactive while blade is engaging
workpiece.
If E-stop (H) is press, all functions will cease. While
E-stop is engaged, you may press and hold Blade
Up button (C
) to return bow to raised position.
1
Release the button and bow will stop functioning. To
resume operations, rotate E-stop button clockwise
until it disengages.
9.2 Blade selection
The HBS-1220DC is provided with a blade
adequate for a variety of jobs on a variety of
common materials.
Sect. 11.0 shows recommended speeds for various
materials. These selections, while appropriate for
many shop cutting needs, do not encompass the
).
1
)
1
) to return bow to
1
12
wide variety of blades of special configuration (tooth
pitch and set) and special alloys for cutting unusual
or exotic materials.
A coarse blade could be used for a solid steel bar
but a finer tooth blade would be used on a thin-wall
tube. In general, the blade choice is determined by
the thickness of the material; the thinner the
material, the finer the tooth pitch.
A minimum of three teeth should be on the
workpiece at all times for proper cutting. The blade
and workpiece can be damaged if the teeth are so
far apart that they straddle the workpiece.
For very high production on cutting of special
materials, or for hard-to-cut materials such as
stainless steel, tool steel, or titanium, ask your
industrial distributor for more specific blade
recommendations.
Also, the supplier who provides the workpiece
material should be prepared to provide very specific
instructions regarding the best blade (and coolant or
cutting fluid, if needed) for the material and shape
supplied.
9.3 Evaluating cutting efficiency
Is the blade cutting efficiently? The best way to
determine this is to observe the chips formed by the
cutting.
If chip formation is powdery, then feed rate is much
too light, or the blade is dull.
If chips are curled, but colored — that is, either blue
or straw-colored from heat generated during the cut
— then feed rate is too high.
If chips are slightly curled and are not colored by
heat, the blade is sufficiently sharp and is cutting at
an efficient rate.
10.0 User-maintenance
Always disconnect power to
machine
before
performing
unless indicated otherwise. Failure to comply
may result in serious personal injury.
Clean up accumulated saw cuttings after use. Make
sure lead screw is kept free of saw cuttings and
other material that could cause damage.
Remove dust or debris from motor fan area with a
vacuum.
If power cord is worn, cut, or damaged in any way,
have it replaced immediately.
Release tension on blade if saw will not be used for
a time.
Periodically clean chip sludge from coolant basin.
maintenance,
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