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9-1-2022
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Machine Operation
Style “L” Smart Bobbins
NOTE: You may use metal, aluminum, magnetic core bobbins and even pre-wound bobbins with your
machine, as long as they are this style. Refer to the photo below for examples of Style “L” bobbins.
Metal bobbins will normally require looser bobbin tension to compensate for their weight. Aluminum and
pre-wound bobbins are similar in weight. Some pre-wound bobbins have cardboard sides; others have no
sides and contain a magnet on the core that substitutes for the bobbin brake or check spring (see photos
below for more information about the brake spring).
Inserting “L” Bobbin into Bobbin Case
Place the bobbin into the bobbin case so that the bobbin rotates clockwise when it is inside of the
bobbin case.
Guide the thread tail through the slot on the bobbin case (Photo A), and then under the flat tension finger
on the outside of the case (Photo B).
If you need to adjust the bobbin tension, use a small screwdriver to rotate the larger screw (Photo A –
tension adjustment screw) in small 5-minute increments. Turn the screw to the right to increase bobbin
tension and to the left to decrease tension.
Magna Glide
(Magnetic
Core)
Metal
Pre-wound with
Cardboard Sides
Aluminum
Tension Adjustment Screw
Photo C
Photo D