Brother International SB7900E Operation Manual - Page 70
Bobbin Case Adjustment
View all Brother International SB7900E manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 70 highlights
EMBROIDERY Bobbin Case Adjustment The bobbin case installed in this machine can be adjusted, if necessary, to accommodate the bobbin tension for embroidering. The insertion below describes how to adjust the bobbin tension for embroidery use. Using a small slotted screwdriver, turn the slotted-head (b) screw to adjust the bobbin case tension. Bobbin thread is tight Upper thread on the right side of fabric seems to be lifting/looping and bobbin thread is not seen on the wrong side of fabric. a Do not turn a phillips screw (+). b Adjust with a screwdriver (small). Correct tension Upper thread slightly appears on the wrong side of fabric. a Right side b Wrong side If this occurs, turn the slotted-head screw (b) counterclockwise being careful not to over-loosen the screw, approximately 30-45 degrees to decrease bobbin tension. a Right side b Wrong side Bobbin thread is loose Bobbin thread appears slightly on the right side of fabric. a Right side b Wrong side If this occurs, turn the slotted-head screw (b) clockwise, being careful not to over-tighten the screw, approximately 30-45 degrees to increase bobbin tension. CAUTION ● When adjusting the bobbin case, be sure to remove the bobbin from the bobbin case. ● DO NOT adjust the position of the Phillips (a) screw on the bobbin case as this may result in damage to the bobbin case, rendering it unusable. ● If the slotted-head screw (b) is difficult to turn, do not use force. Turning the screw too much or providing force in either (rotational) direction may cause damage to the bobbin case. Should damage occur, the bobbin case may not maintain proper tension. 68