Not Detecting Thread Break

This article lists the steps to resolve Thread Breaks not being detected. If thread break detection is working intermittently, follow these same troubleshooting steps.

To test if a troubleshooting step below has resolved the situation run the Thread Sensor Test when prompted. If the test completes successfully you can disregard any additional troubleshooting steps.

Thread Sensor Test

Load the Thread Break Sensor Test.ofm

The thread break test should be sewn on one layer of white broad cloth or equivalent with one layer of 2 oz. cut-away backing.

Set your ‘Color Sequence’ to needles 1, 9 and 16.

4. While sewing, wait 100 stitches and cut the thread below the thread sensor before the last guide hole. Wait 75 stitches to see if the thread break was detected. Run and cut it at least once for each; 1,9 and 16.

There should be no thread breaks or pull outs other than the artificial ones. Also, there should be no inconsistency in the fill portion of the design.

If the design finishes and each of the three artificial thread breaks was recognized by the machine, the ‘Thread Break Sensor Test’ is complete and was successful.

Troubleshooting Steps for Thread Breaks not being Detected

1. Click on Tools > Settings… > Machine tab

Make sure ‘Enable All Thread Detection’ and ‘Enable Bobbin Thread Detection’ are checked.

2. Click Apply and OK. Run the ‘Thread Break Sensor Test’.

3. Spin the Thread Sensor 1/4^TH of a turn.

4. Run the ‘Thread Break Sensor Test’.

5. If you are still getting problems, check ‘TBS Sensitivity’. Click on Tools > Settings…> Machine tab

6. Set the ‘TBS Sensitivity’ to -100. After making this change, if you start to encounter False Bobbin Breaks, follow the appropriate steps.

7. Update your software to the most recent software version.

8. If you are using Amaya OS, try running AMAYA OS v10.00.051.

9. Run the ‘Thread Sensor Test’.

10. If the situation remains unresolved, you will need additional technical assistance. Here are the available Melco Technical Support options. The Thread Sensor might need replacing.

11. Run the ‘Thread Sensor Test’.

12. If the situation remains unresolved, you will need additional technical assistance. Here are the available Melco Technical Support options. The ‘Main-Board’ might need replacing. For the EMT16 Plus this is part number: ‘34799 PCB Assembly, Control Board, EMT16’