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