SunStar HC Series User Manual (English)

Questions and Answers:

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Ronald BowenSep 9, 2025
What to do if SunStar HC Sewing Machine has short upper thread after trimming due to separation failure?
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  Michael WilliamsSep 9, 2025
  If your SunStar Sewing Machine has a short upper thread after trimming due to separation failure: * Adjust the insert angle of the movable blade to 295° if the movable blade is too fast or too slow to separate the upper thread. * Adjust the picker position if it's in an incorrect position. * Check and change fuse F1. * Check/change the solenoid and solenoid connection. * Check the connection and change the joint board if there's a picker failure.
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kevinfosterAug 23, 2025
How to troubleshoot bad stitch quality on SunStar HC Sewing Machine?
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  Blake CortezAug 23, 2025
  If you're experiencing bad stitch quality on your SunStar Sewing Machine, here's what you can do: * Correct the tape. * Adjust the tension on the X-Y belt. * Clean the X-Y rail to remove any foreign substances. * Change the circuit board. * Reduce the speed of the main shaft if the frame has a heavy load.
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Brian StricklandAug 25, 2025
What to do if my SunStar HC skips stitches?
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  wchristianAug 26, 2025
  If your SunStar Sewing Machine is skipping stitches, here are some things to check: * Change the needle if it's bent. * Adjust needle installation. * Adjust timing. * Adjust the lower dead stop. * Use a whetstone to adjust the hook point or change hook. * Adjust thread tension. * For upper thread, change bobbin or bobbin case. Select the right thread for embroidery. * Adjust stroke or tension. * Change presser foot spring if the fabric moves with the needle due to a weak or damaged presser foot.
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Theresa SheltonAug 27, 2025
What to do if my SunStar Sewing Machine has poor stitch tension?
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  kimberlyfreyAug 27, 2025
  If your SunStar Sewing Machine has poor stitch tension, consider these solutions: * Adjust the upper thread tension. * Clean main and sub tension adjusters in the thread tension adjusting plate. * Adjust lower thread tension. * Clean the bobbin case and check tension on the bobbin spring. * Change to quality thread. * Adjust timing. * Oil the raceway of hook.
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Samantha SimpsonAug 27, 2025
Why is my SunStar Sewing Machine not trimming correctly?
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  Natalie WigginsAug 27, 2025
  If your SunStar Sewing Machine is experiencing trimming failure, here are a few things to check: * Check and change fuse F1 in the joint board if there's a short-circuit in the trimming fuse. * Check and change the solenoid and solenoid connection if there's a poor connection or quality of the trimming solenoid. * Check the connection. * Change the joint board if the trimming driver TR is damaged.
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Cynthia WrightAug 29, 2025
How to fix incorrect stop position on SunStar HC?
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  Casey MendozaAug 29, 2025
  To correct an incorrect stop position on your SunStar Sewing Machine: * Adjust the belt tension if it's loose on the main driver belt. * Adjust the encoder position or change the encoder if the encoder is in an incorrect position or is bad.
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Paul HowardSep 13, 2025
Why is my SunStar HC Sewing Machine thread not cut (at specific head)?
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  Courtney BoltonSep 13, 2025
  If the thread is not being cut at a specific head on your SunStar Sewing Machine, check the following: * Check the screws and crank driver clamp screws of the movable blade if there's a failure of the movable and fixed blades. * Check the tension of the fixed blade if there's loose cross tension of the blades. * Change the movable blade if it's damaged. * Adjust the position of the movable blade if it's in an incorrect return position.
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Austin GarciaSep 10, 2025
How to troubleshoot thread break before trimming on SunStar HC Sewing Machine?
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  jrichardsonSep 10, 2025
  If the thread breaks before trimming on your SunStar Sewing Machine, consider these solutions: * Adjust the upper thread tension if the upper thread is too short; remove any dent using a whetstone or sandpaper, or change the movable blade. Check main and sub tension adjuster dent or damage to movable blade. * Adjust or change the bobbin case spring, and clean/check for dents in the thread guide on the bobbin case if the lower thread is too short, doesn’t unwind smoothly, or is too weak or too elastic. * Change the lower thread.
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John SwansonSep 7, 2025
What causes trimmer return failure on SunStar Sewing Machine?
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  Frank BowenSep 7, 2025
  If you're experiencing trimmer return failure on your SunStar Sewing Machine, check the following: * Check the connection of the sensor. * Change the circuit board. * Change the sensor or adjust the sensor position. * Clean around the sensor.
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Wanda EstesSep 4, 2025
How to resolve a bad color change on SunStar Sewing Machine?
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  Peggy HensleySep 4, 2025
  To resolve a bad color change on your SunStar Sewing Machine: * Refer to user’s manual. * Run manual color change and check if signal lamps (needle set lamp & needle position lamp) blinks at correct needle position. Adjust the half-turn film. * Set it to the correct position if the needle stop is in an incorrect position. * Adjust so the take-up lever is in line with other levers in the stop position (upper shaft angle: 100°) if it's in an incorrect position. * Change fuse F3 in the joint board or check the connection if there's a fuse failure for the color change motor or a bad connection.