embroidery, causing the thread to loop on either the top side or the back side of the garment,
possibly both. The monogram will look rough, and will not lie smoothly on the fabric. The
bobbin tension on the back side of the garment will look very narrow.
You may find it necessary to adjust the top tension to compensate for variances in material or
thread. Generally when you are 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 tension knob on the top tension assembly is marked with a + and -, with an
arrow between them. Turn the top tension knob clockwise, toward the + sign,to
tighten the top thread tension.
2. Turn the top tension knob counterclockwise, toward the - sign,toloosen the top
thread tension.
Checking the Top Tension
1. Make sure that the take-up lever is at its highest position.
2. Pull thread slowly, through the eye of the needle. You should feel some resistance,
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.
1-22 X Series Mechanical Guide
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