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SunStar KM-590BL - Adjusting Spring Tension and Stitch Count; Adjusting Presser Foot Pressure

SunStar KM-590BL
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14
6) Adjusting the spring tension
󳢯
The thread take-up stroke is normally 7~10mm. As a standard, the twisting strength of the thread take-up spring is 40~60 g.
󳢯 Loosen the screw of the thread take-up lever and turn the thread-adjusting device to achieve the proper thread take-up
stroke. (Set the stroke low for heavy materials and high for light materials)
󳢯 Insert the driver into the groove of the post of the thread-adjusting device. Turn it left and right to adjust the tension of
the thread take-up spring. (High for heavy materials and low for light materials)
[ Figure 12 ]
7~10mm
Large
Small
40~60g
Strong
Weak
Strong
7) Adjusting the number of stitches
󳢯 Align the number indicated on the dial with a pin
placed above the dial.
The higher the number is, the more number of stitches
you will get.
󳢯 Press in the reverse lever to perform reverse sewing, and
take your hand off the lever to perform normal sewing.
[ Figure 13 ]
8) Adjusting the presser foot pressure
󳢯 Loosen the fixing nut of the pressure-adjusting screw.
Rotate the pressure-adjusting screw to the left and right to
set the pressure low, just enough to keep the sewing material
in place. Tighten back the fixing nut .
󳢯 Unfasten the fixing nut of the pressure-adjusting screw.
Turn the pressure-adjusting screw in a clockwise direction
to increase the pressure, and turn in a counterclockwise
direction to decrease the pressure. Tighten the fixing nut
after adjustments.
[ Figure 14 ]
Weak

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