First, it's important to determine whether the issue is happening with ALL needles or just one or a couple.
If it's only happening with one or a few needles, it's possible that the issue could be related to the Thread Path or the Tension being too tight.
Make sure that your upper and bottom tension knobs are not too tight and that the wheel underneath the middle knob spins when you pull the thread from the bottom of the machine. (marked in orange below)
If the issue is happening with multiple needles and the machine is stopping after a few seconds, it may be that the sensor sensitivity is too high. To adjust the sensor sensitivity, follow these steps:
1. On the control panel, click on the "EMB Param" button.
2. Search for "Thread Broken Sensitivity"
3. Once you find it, if it is set to "No Check", then change it to "5" and test the machine.
If it continues to stop, try setting it to "7" or "9". If it continues to stop, and all other areas are correct, then it's possible the sensor may be faulty and might need to be replaced. Please let us know if this is the case.
Need additional help?
Please don’t hesitate to reach out to us for further assistance via email at service@ricoma.com or by visiting our support page at www.ricoma.com/US/support.