Barudan BEVT Series, Instruction Manual

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When different problems show up on different letters, the problem is in the top tensions.
Letters #1, #2 and #7 need the top tension loosened so the bobbin can pull more of the top
thread to the back. Letters #3, #4 and #9 need the top tension tightened because there is too
much of the top thread being pulled to the back.
Adjusting The Top Tension
There is a pretensioner for each needle. The pretensioners control the flow of thread from the
cone to the top tensioners. The pretensioners are set, according to the type of thread used, to
allow a smooth flow of thread to the top tensioners. The pretensioners should only need
adjustment when changing from a light weight thread to a heavier weight, or vice versa.
Adjusting the Pretensioners
1. If the thread does not flow freely, loosen the pressure on the spring that holds the disk
down by turning the thumb nut counterclockwise.
2. If the thread flows too freely, increase the pressure on the spring that holds the disk
down by turning the thumb nut clockwise.
The top tensioners control the top thread tension. If the top tension is too tight, the bobbin
will not be able to pull enough of the top thread to the back of the embroidery. Top tension
that is too tight may cause thread breaks, needle breakage, or puckering of the fabric. If the
tension is too loose, the bobbin will pull too much of the top thread to the back of the
embroidery, causing the thread to loop on either the top side or the back side of the
monogram, possibly both. The monogram will look rough, and will not lie smoothly on the
fabric. The bobbin tension on the back side of the monogram will look very narrow.
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