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Checking Bobbin Tension
To check the tension of the bobbin, hold the bobbin thread with one hand. As you gently release the
bobbin case, it should not drop. With the bobbin case hanging on the bobbin thread, bounce the case
slightly and it should drop about ¼-½ inch.
Adjustment
If the tension is too tight or too loose, use a flat-blade screwdriver to turn the screw clockwise to tighten
or counterclockwise to loosen the tension. A little bit goes a long way; adjust as necessary.
The machine functions better when the bobbin is full. When the bobbin spools reaches the last 1/16”
or so of thread the tension loosens drastically and false bobbin and other errors result. If this happens,
replace the bobbin thread with a new spool and recheck the bobbin tension.
Presser Foot Adjustment at Bottom Dead Center
Measurement
Measure the presser foot adjustment at bottom dead center (BDC) without a hoop installed. This is the
distance from the bottom of the presser foot to the top portion of the needle plate dome. Use a feeler
gauge to measure this adjustment.
The height of the presser foot from the top portion of the needle plate dome should be 0.1-0.6 mm
when the needle is at BDC.
Adjustment
For minor adjustments to the presser foot height, use the presser foot eccentric located behind the lower
section of the needlecase to adjust it.
For adjustments to the presser foot eccentric itself, contact Technical Support for instructions.
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