Troubleshooting Thread Slingshots

Slingshots are similar to Thread Breaks but only happen during Tie-Ins or Tie-Offs. They are different because the thread will not break out of the needle eye but instead is pulled out, either because of a Release of Tension or a Short Tail.  To test for Slingshots, you can use the AmTrim Test.


Tie-In Slingshots (aka Pull Outs):

  1. If you're machine is not laying stitches when it starts, it might be exhibiting slingshots while tying-in. Follow these steps to resolve in this article on Missed Starts (Mis-Starts).

Tie-Off Slingshots: 

  1. Run an AmTrim test, to test for needle specific issues and test for design-specific issues.
  2. Update your software to the most recent software version.  
  3. Check your Bobbin.
  4. Check your Presser-Foot.
  5. Check your Acti-Feed. It is often set too low. 
  6. Check your Hook Adjustments: EMT16Plus and EMT16*  or  XTS and XT
  7. Check the Digitization. You can run an AmTrim Test to confirm Slingshots.
  8. Verify the Thread Type is appropriate for the application.  Typically, Rayon and Metallic threads are more susceptible to slingshots.
  9. Make sure a Thread Feed Forward 200 Test completes successfully.
  10. A Feeder Profile Test can be performed.
  11. If your machine is a Bravo2, EMT16 or EMT16Plus, check for a Damaged Cutter.  You might need to Replace your Cutter / Trimmer 
  12. Replace your Rotary Hook: Replacing EMT16Plus and EMT16 Hook  or  Replacing XT and XTS Hook
  13. If the situation remains unresolved, you will need additional technical assistance. Here are the available Melco Technical Support options.
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