Barudan BEVT Series, Инструкция по эксплуатации

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It may be necessary to adjust the top tension to compensate for variances in material or
thread. Generally when using a thicker material (e.g., heavy jackets) or thicker thread, the
upper tension should be set more loosely.
Adjusting the Top Tension
1. The plastic knob on the top tension assembly is marked with a + and -, with an arrow
between them. Turn the top tension disk
clockwise
, toward the
+ sign
, to
tighten
the
top thread tension.
2. Turn the top tension disk counterclockwise , toward the - sign , to loosen the top thread
tension.
Checking the Top Tension
1. Make sure the take-up lever is at the highest position by verifying that the word “TOP”
is displayed on the screen. If not, rotate the main motor pulley so the take-up lever is at
the correct position.
2. Pull thread slowly, from front to back. Some resistance may be felt, but not so much
that the thread feels as if it will break.
Adjusting the Bobbin Tension
The bobbin tension is set by adjusting the larger screw on the bottom of the bobbin case. To
test the tension, insert a bobbin in the case and slowly pull the end of the thread. The thread
should unwind slowly and smoothly out of the bobbin case, yielding a slight resistance.
Experience will help you determine the correct degree of tension.
The tension is preset on all new bobbin cases, so readjusting bobbin tension is not often
necessary. A poly-core, cotton-wrapped thread is recommended for the bobbin; however,
other types will also work.
CAUTION! After continued use, an accumulation of lint or thread under
the thread tension spring on the bobbin case may hold the spring away
from the thread, diminishing the tension. BEFORE MAKING ANY
ADJUSTMENTS TO THE BOBBIN CASE, check this area for lint or
thread. If the built up lint or thread is overlooked, the operator could be
adjusting bobbin tension to no avail. Over-tightening the bobbin tension
will bend the top of the tension spring and the bobbin case will have to be
replaced.
Adjusting the Bobbin Tension
1. Turn the screw on the bobbin case clockwise to tighten bobbin tension.
2. Turn the screw on the bobbin case counterclockwise to
loosen
the bobbin tension.
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Mechanical
Guide Machine Basics
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