SunStar SPS/B-2516 Series

Questions and Answers

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Christine BrownAug 12, 2025
What to do if there is ineffective sense of upper thread on my SunStar Sewing Machine?
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  franklinjohnAug 12, 2025
  If you're experiencing ineffective sense of the upper thread on your SunStar Sewing Machine, it could be due to a bad connection between the take-up lever spring and detecting plate. To resolve this, clean up the take-up lever spring and detecting plate, then adjust the tension of the take-up lever spring and the connecting condition of the detecting plate. Alternatively, there might be a bad connection of the wire with the thread sensor plate, so try reconnecting the wire with the thread sensor plate.
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Kevin MercerAug 16, 2025
Why is the thread tightening quality poor on my SunStar SPS/B-2516?
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  Donald CooperAug 16, 2025
  If the thread tightening quality is poor on your SunStar Sewing Machine, it could be due to weak tension in either the upper or lower thread. In either case, adjust the tension of the upper sensor. Another potential cause is improper timing of the needle and shuttle, so readjust the timing of the needle and shuttle.
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Alyssa PaulAug 20, 2025
What to do if the thread is cut on my SunStar Sewing Machine?
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  Toni RamosAug 20, 2025
  If the thread is cut while using your SunStar Sewing Machine, several factors could be at play. It could be due to incorrect thread insertion, so ensure the thread is properly inserted. The needle's installation might be off, affecting its height or direction, thus requiring reinstallation. A damaged needle, perhaps bent or cracked, should be replaced. Also, check for excessive tension in the upper and lower threads and adjust accordingly. The take-up lever spring's tension and stroke should also be adjusted if they are excessive. Lastly, a crack on the shuttle surface spring's controlling hole necessitates replacing the shuttle surface spring.
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peter42Aug 23, 2025
Why is my SunStar SPS/B-2516 skipping stitches?
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  Dawn SheltonAug 23, 2025
  If your SunStar Sewing Machine is skipping stitches, there are several potential causes. A bent needle could be the culprit, so try exchanging it. Ensure that the needle size is appropriate for the thread you're using; if not, exchange the needle for the correct size. Double-check that the needle is correctly installed and reinstall if necessary. The timing between the needle and shuttle may be off, in which case you should reinstall the timing. Also, verify that the interval between the needle groove and shuttle point isn't too large and reinstall the timing if needed. Finally, excessive tension and stroke of the take-up lever spring can cause this issue, so reinstall the timing for the needle and shuttle.
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Kelly FarleyAug 27, 2025
What causes the needle to be bent on my SunStar SPS/B-2516 Sewing Machine?
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  Erin BrennanAug 27, 2025
  If you notice the needle is bent on your SunStar Sewing Machine, it may be due to damage such as bending, cracks on the needle hole or groove, or abrasion/transformation of the needle tip; in this case, you should exchange the needle. Another reason could be incorrect needle installation, so ensure the needle is properly installed. Finally, the needle may be contacting the shuttle, so adjust the distance between the needle and shuttle properly.
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Marilyn ThomasAug 30, 2025
What to do if there is an error on the operation of my SunStar Sewing Machine?
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  Paul SnyderAug 31, 2025
  If you are experiencing an error during the operation or drive of your SunStar Sewing Machine, it could be due to a few reasons. The belt tension might be loose, or the belt could be damaged, so adjust the belt tension or replace it. There could be a fuse shortage in the main power or circuit, so check the fuse shortage of the main shaft drive motor in the controller box, and replace it if needed. Also, the feed bracket may have deviated from its Y and Y limit, so move the feed bracket to its normal position inside the limit switch.
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Charles HaasSep 3, 2025
Why is the stopping position bad on my SunStar Sewing Machine?
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  Henry SloanSep 3, 2025
  If your SunStar Sewing Machine has a bad stopping position, it could be caused by slackness of the main drive belt, in which case you should adjust the belt tension. Another cause could be the wrong position of the upper shaft sensor plate or photo sensor, so adjust the position of the upper shaft sensor plate or exchange the photo sensor.
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Meghan RichardsonSep 7, 2025
How to fix mistakes of trimming on SunStar SPS/B-2516 Sewing Machine?
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  Larry PaceSep 8, 2025
  If you are experiencing mistakes during trimming with your SunStar Sewing Machine, it might be due to slackness of exchange tension between the moving and fixed mes, so adjust the tension of the fixed mes. Groove abrasion on the blade of the moving and fixed mes could also be a cause, so exchange the moving and fixed mes. Also, the trimming cam may be in the wrong position, so readjust the position of the trimming cam.