Baileigh Industrial BHVBS-712B, Инструкция по эксплуатации и каталог запасных частей

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piece rather than a smaller one. The maximum
thickness variation on any test piece should be no
more than 0.003 inch, per side, per inch of stock
diameter.
8.11 Setting Feed Rate
Feed rate of blade into workpiece is important to
band saw performance. Excessive pressure of the
blade against the workpiece may cause stalling or
blade breakage. In contrast, insufficient pressure
rapidly dulls the blade.
The hydraulic cylinder resists bow movement in
downward direction. It offers no resistance when
bow is raised.
To increase feed rate, turn dial (U
1
, Figure 8-10)
counterclockwise. To decrease, turn clockwise.
To close hydraulic flow, turn lever (U
2
) down,
perpendicular to cylinder. To open hydraulic flow,
turn lever (U
2
) parallel to cylinder, as shown.
Feed rate is adjusted by operator until saw is
operating efficiently, usually determined by
observing chip formation. See
section 9.3,
Evaluating Cutting Efficiency.
Figure 8-10: Feed Rate Adjustment
8.12 Counterbalance Spring
The counterbalance spring helps control the amount
of weight, or feed pressure, the bow puts on the
workpiece when the hydraulic control valve is fully
open. The hydraulic cylinder will not compensate for
improper counterbalance. If the spring is improperly
set, one can expect poor performance, crooked
cuts, tooth stripping, stalling, and/or blade running
off wheels.
The spring tension has been set by the
manufacturer and should not require adjustment. If
future problems arise, indicating improper
counterbalance, adjust spring as follows:
1) Disconnect the machine from the power source.
2) Open hydraulic cylinder valve and place bow in
horizontal position. Turn hydraulic cylinder dial
counterclockwise until it stops.
3) Place a weigh scale (such as spring or hanging
scale) beneath the blade tension handle and lift
the saw bow. Scale should indicate
approximately 5 to 6 kg (11-13 lb).
4) If adjustment is needed, loosen one nut and
tighten the other (Figure 8-11) on the eye bolt,
until scale indicates 5 to 6 kg (11-13 lb).
A good indication of proper feed pressure is the
color and shape of the cutting chips. If the chips are
thin or powdered, increase feed pressure. If the
chips are burned and heavy, decrease feed
pressure. If they are still burned and heavy, reduce
blade speed. Optimum feed pressure has been set
when the chips are curled, silvery, and warm.
Figure 8-11: Feed Pressure Adjustment
8.13 Blade-to-Table Squareness
The blade must be perpendicular to table to ensure
a straight cut. This setting should be confirmed by
the user. Special blade setting gauges can be
purchased for this type of inspection; however, it can
also be done using more common shop items, as
follows.
1) “Extend” the blade surface by clamping a
straight, flat object to blade. (Figure 8-12 uses
small, lightweight aluminum ruler.) Use
lightweight clamp.
2) Place square on table and against ruler. The
square should lie flat against ruler without a
gap.
3) If there is a gap, loosen bolt (Q, Figure 8-7) on
each blade guide assembly and rotate blade
guide assembly until gap is eliminated between
square and ruler.
4) Retighten bolts (Q, Figure 8-7).
5) After making this adjustment, be sure to
reinspect other blade adjustments as noted in
this manual.
Figure 8-12: Table/Blade Squareness