SunStar KM-235B - User Manual

Questions and Answers

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jacob74Aug 12, 2025
Why does the thread keep breaking on my SunStar KM-235B?
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  Charles GreenAug 12, 2025
  Thread breakage can occur for several reasons: * The threading may be incorrect: Thread the needle correctly. * The needle may be bent or have a broken tip: Change the needle. * The needle may be inserted incorrectly: Insert the needle correctly. * The upper thread tension may be too tight: Reduce tension of upper thread. * The lower thread tension may be too loose: Reduce tension of lower thread. * The upper thread may be loose: Adjust take-up lever spring.
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Shelly GibsonAug 15, 2025
Why does the needle keep breaking on my SunStar KM-235B Sewing Machine?
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  Linda YoungAug 16, 2025
  A needle might break due to several reasons: * The needle may be inserted in the wrong position: Reinsert the needle correctly. * The needle may be bent: Change the needle. * The timing of the feed dog may be off: Adjust the timing of the feed dog. * There could be bad timing between the needle and hook: Adjust the timing of needle and hook.
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Steven MitchellAug 20, 2025
What to do if my SunStar KM-235B Sewing Machine is skipping stitches?
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  nathan33Aug 20, 2025
  Stitch skipping can occur due to: * The needle being inserted in the wrong position: Reinsert the needle in the right direction. * A bent needle or broken needle tip: Change the needle. * The thread passing at the wrong position: Thread the needle correctly. * Incorrect timing of the needle and hook: Adjust the timing of needle and hook.
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Ray CochranAug 23, 2025
What causes trimming errors on my SunStar KM-235B Sewing Machine and how to fix it?
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  johnsonjasonAug 25, 2025
  Trimming errors can occur due to: * Misaligned tension between the movable and fixed blades: Adjust tension of movable and fixed blade. * Abrasion in the blade groove of movable and fixed blade: Replace movable and fixed blade. * Incorrect needle insertion: Reinsert the needle correctly. * Insufficient crossing between the fixed and movable blades: Set the stroke of the movable and the fixed blades.
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Sharon GuzmanAug 27, 2025
Why does the upper thread not sink on my SunStar Sewing Machine?
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  Eric PatrickAug 27, 2025
  If the upper thread doesn't sink, it could be due to: * Upper thread tension being too tight: Reduce tension of upper thread. * Lower thread tension being too loose: Increase tension of lower thread.
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Kelly CarterAug 31, 2025
Why does the upper thread come off when sewing starts with my SunStar KM-235B Sewing Machine?
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  patricia54Aug 31, 2025
  The upper thread coming off at the start of sewing may be caused by: * Upper thread tension being too tight: Adjust upper thread tension. * The needle being too thick for the thread: Check the needle thickness. * The thread take-up lever pulling out the thread due to too high needle up/down position: Set the needle up-stop position.
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Angel Conner PhDSep 4, 2025
Why does the lower thread not sink on my SunStar KM-235B?
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  Tammy MillerSep 4, 2025
  If the lower thread is not sinking, it could be due to: * Upper thread tension being too weak: Increase tension of upper thread. * Lower thread tension being too strong: Decrease tension of lower thread.
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David WigginsSep 8, 2025
Why does my SunStar Sewing Machine skip stitches after trimming?
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  Frank AllenSep 8, 2025
  Stitch skipping after trimming can be caused by: * Short remaining length of upper thread: Adjust the thread adjusting device. * Lower thread dropping from bobbin case due to bobbin racing during trimming: Change the racing protection spring. * Weak take-up lever spring: Adjust the working capacity of take- up lever spring.