Butterfly B1201B, Manual

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Butterfly B1201B/T - Single Head 12 Needle Embroidery Machine Manual
Step 5 – Pull the bobbin thread out about 6 inches while checking tensions (next section).
Adjust if needed.
Step 5/B – Always check tensions on the bobbin when replacing it. The bobbin lasts
approximately 32,000 stitches. Bobbin tensions might vary from bobbin to bobbin and the tension does
change as the bobbin is used.
Bobbin Thread Tensions
The bobbin thread tension is typically considered much more important that the upper thread
tension because all 12 needles depend on the tensions of the bobbin in order to embroidery properly. It
is important to set the bobbin tensions one time and try not to adjust it per color but rather adjust each
other color/needle to conform to the bobbin. The bobbin
tensions might need to be changed when replacing the
bobbin and should be checked regardless. The operator
should check the tensions of the bobbin after each run by
looking at the bobbin of the final embroidery product for
excess or shortage of bobbin thread. Generally on a
column stitch 1/3 of the column should be bobbin thread
and the other 2/3 upper thread.
An adjuster screw is located on the tension spring. Next to the adjuster screw is a fixed screw
that holds down the tension spring. This fixed screw should never be touched. Tightening (turning
clockwise) will tighten the tension of the bobbin. When tightening the bobbin, less bobbin thread will
show underneath the final embroidered item. Loosening (turning counterclockwise) will lessen the
bobbin tension. When loosening the bobbin, more bobbin thread will show underneath the final
embroidered item. The bobbin tension should be set about the same at the upper thread tension. The
same example of the 3 quarters ($0.75) can be applied. Another way to check tension is to hold the
bobbin thread and drop the bobbin case. The case should fall approximately 1 – 3 inches. If it falls too
far, the tensions need to be tightened. If it falls too short, tensions will need to be loosened. However,
that is only an example and tensions will variate from bobbin to bobbin and from bobbin case to bobbin
case. The only way to set the tension accurately is by eye, based on the final embroidery quality.
*Note ‐ If you are using a bobbin case tension gauge the approximate setting should be between 25 ‐ 35
grams