Bag Balance Weight (right front of scale)
When your scale is mounted to the hopper and has the weight bar attached
(without weights), the weight indicator should point to zero. If not, adjust
the indicator to zero by rotating the bag balance weight. The bag balance
weight is also used to compensate for the weight of the bag. Attach an
empty bag. Now rotate the bag balance weight so that the weight indicator
again points to zero.
Trigger Trip Screw (right rear of scale)
This is your adjustment for light or heavy materials weight in the bag.
It accounts for the materials in suspension between the shut-off gate and
the bag (similar to the water in the hose between the valve and the end
of the hose). If your bags are consistently weighing light, the trigger
trip screw is too sensitive and trips early. Adjust the screw upward. This
will allow additional weight in the next bag. Do not attempt to adjust
the trigger trip screw during the filling of a bag.
Regulating Slide (left front of scale)
Some materials are heavier and some flow more freely than others. When
weighing a heavy, fast flowing material, the opening should be smaller
so that materials flow slower. Excessive flow causes inaccurate weighing.
When shipped, the regulating slide has a small opening. To increase it
simply loosen the wing nut, pull handle down and re-tighten wing nut.
Dash Pot (right rear of scale)
The dash pot is the buffer between the scale and the pointer. Without
a dampening device the pointer would never settle down. The dampening effect
is accomplished by a metal plate about the size of a quarter riding up
and down in an oil bath. The oil is a non temperature sensitive 200 weight
silicone oil-dash pot oil. The dampening effect is changed by turning the
dash pot lid. The oil should completely fill the oiler to the top, approximately
2 oz. total. Change the oil when dirty or approximately every 6 months.
Main Beams, Pivots & Bearings (both sides of scale)
The bearings and pivots on both sides of the scale have bolts approximately
1/8" (3mm) from them from jumping during operation. Please be sure that
these bolts do not touch the bearings or pivots and that the gap spacing
is correct.
Compensation Spring
The compensation spring is used to help place the beam in motion. The
beam should contact the spring before it reaches the beam stop bracket
on the downward or empty position. The beam should be free or clear of
the spring before the final cutoff. The compensation spring can easily
be bent up of down to adjust.
We occasionally find a problem with corrosion on portable sewing machines, particularly around the looper shaft, and feed dog carrier block. During these hot, humid days of summer this can occur even with machines used and stored inside.
The lubrication system on the portable is not a closed oil system, so during periods of storage the oil will drain out through the bottom of the machine. This can be mitigated by oiling before sewing, and then running the machine in short bursts to allow the oil to flow down over all the parts. Allow a few seconds and then start sewing.
During the night, particularly with humid days, a certain amount of moisture in the air will condense on the metal parts as they cool off. When this occurs, some corrosion will begin to form. If left for a few days, such as over a weekend, the amount can be enough to cause some added wear on parts. This can be prevented by spraying some water displacement, such as WD-40 brand, on the exposed wear parts; i.e., the looper shaft, carrier block assembly, and needle shaft. Just enough to lightly coat these parts will help. If the machine has been stored for a week or more, spray some lightly on these parts before starting the machine. Then oil as noted above.