Wednesday, February 19, 2014
Necchi Supernova Tension Release Adjustment
Frank was also having a problem with the upper tension release. He said the disc opening lever “N” in the figure below that is supposed to press the disc opening rod in the back of the tension assembly was not close enough to the end of the release rod to do its job and release the upper tension. If his machine had the tension assembly removed for any reason or the tension knob had been bumped, the position of the tension mechanism could be incorrect.
Hopefully, this procedure will correct that problem.
It is very important to check whether the position of the tension mechanism is correct.
- Set the presser bar lever in its intermediate (embroidery) position.
- Check that the disc opening rod “B” in the below figure is as close as possible to the disc opening lever “N” without actually touching.
- Ensure that the thread take-up spring can move freely without rubbing against the machine arm. Distance “a” in the below figure should be about 1/16” (1.5mm)
If an adjustment is needed, loosen screw 048050 GEB and move the entire tension mechanism along its axis (do not rotate it) then tighten screw 048050 GEB firmly.