In this video, we explain the upper thread sensor function and how it affects thread break and bobbin run-out detection. This setting determines how many stitches are sewn before the machine decides there is a thread break or that the bobbin has run out.
We may adjust this setting if the machine does not properly detect a thread break. To increase sensitivity, we use a lower number. To decrease sensitivity, we use a higher number. The available range is 0 to 10, with 0 being the most sensitive and 10 being the least sensitive. Under normal operation, this setting is usually kept between 1 and 3.
To change the upper thread sensor sensitivity, we move the cursor with the up and down button next to the upper thread sensor setting, then press the set button. We then enter the desired value on the keypad and press set again to confirm. In this example, we enter 2 for a fairly sensitive setting.
We only change this function if the sensor is not working correctly. If the machine is running properly, this setting should not need adjustment.
For SWF setup issues like thread-break detection, the most relevant companion resource is the SWF repair, maintenance, and operation DVD set.