SunStar HC Series - User Manual

Questions and Answers

R
Ronald BowenSep 9, 2025
What to do if SunStar HC Sewing Machine has short upper thread after trimming due to separation failure?
- M
  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.
K
kevinfosterAug 23, 2025
How to troubleshoot bad stitch quality on SunStar HC Sewing Machine?
- B
  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.
B
Brian StricklandAug 25, 2025
What to do if my SunStar HC skips stitches?
- W
  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.
T
Theresa SheltonAug 27, 2025
What to do if my SunStar Sewing Machine has poor stitch tension?
- K
  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.
S
Samantha SimpsonAug 27, 2025
Why is my SunStar Sewing Machine not trimming correctly?
- N
  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.
T
Thomas GilesSep 22, 2025
What to do if SunStar Sewing Machine failure to hold upper thread?
- K
  karen26Sep 22, 2025
  If your SunStar Sewing Machine fails to hold the upper thread: * Adjust the stroke if there are short strokes of the upper thread holder. * Adjust the workload if the upper thread holder is overloaded.
J
jacksonseanSep 16, 2025
What to do if SunStar HC has dent on thread path on hook and bobbin case?
- J
  Jennifer SmithSep 16, 2025
  If there's a dent on the thread path on the hook and bobbin case of your SunStar Sewing Machine: * Remove the dent or change the case if there's a narrow space between the hook holder and groove for the hook holder on the hook. * Oil the raceway of the hook if there's insufficient oil. * Adjust the timing of the needle and hook. * Adjust the lower dead stop. * Check the thread path in the presser foot, around the needle hole on the needle plate, the thread guide on the head, and the thread path in the tension adjuster. * Fix the material firmly. * Adjust the height if the presser foot height is inadequate (does not press the work material).
E
Emily ChangSep 18, 2025
What to do if SunStar HC Sewing Machine has bad thread (weak, uneven thickness, poorly twisted, old)?
- K
  Kathryn JonesSep 18, 2025
  To address issues with bad thread on your SunStar Sewing Machine: * Change the thread. * Change to left-twisted thread. * Adjust tension. * Adjust tension and stroke.
J
John SwansonSep 7, 2025
What causes trimmer return failure on SunStar Sewing Machine?
- F
  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.
W
Wanda EstesSep 4, 2025
How to resolve a bad color change on SunStar Sewing Machine?
- P
  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.