12
Fig. 12
Operation
Spring Setting
Referring to Fig 11.
Counterbalance spring
The counterbalance spring helps control the amount of
weight the saw bow puts on the work-piece when the
hydraulic control valve is fully open. The hydraulic
cylinder will not compensate for improper
counterbalance.
If the spring is not set properly, one can expect poor
performance, crooked cuts, tooth stripping, stalling,
and/or the blade running off the wheels.
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 machine from power source.
2.
Turn ON hydraulic cylinder valve and place saw bow
in horizontal position.
3.
Turn feed rate valve on hydraulic cylinder
counterclockwise until it stops.
4.
Place a weigh scale (such as a spring or hanging
scale) beneath blade tension handle, and lift saw
bow. Scale should indicate approximately 5 to 6 kg
(11-13 LB).
5.
If adjustment is needed, loosen wing nut A on the
eye bolt, until scale indicates 5 to 6 kg
(11-13 LB).
Fig. 11
General operating procedure
Referring to Fig 12.
1.
Raise bow until it will clear work-piece by a few
inches, and close hydraulic cylinder valve to secure
it in place.
NOTE: Never start a cut with blade contacting
work-piece.
2.
Place work-piece in vise and tighten vise. The work-
piece should be fitted directly between the jaws
without adding other objects.
When work-piece to be cut is a profiled section, flat
piece or special shape, refer to examples in Figure
29 for proper clamping positions. The top row
shows acceptable clamping positions; the bottom
row shows unacceptable positions.
If thickness of profiled section is very thin, a piece
which duplicates the profile should be fitted inside
the work-piece itself, to prevent work-piece being
crushed between the jaws.
A
