3-Thread Narrow Seam

The looper threads (red/blue) form loops on the bottom side of fabric.

  1. Reduce the LL thread tension (red).
  2. Increase the UL thread tension (blue).

The looper threads (red/blue) form loops on the top side of fabric.

  1. Reduce the UL thread tension (blue).
  2. Increase the LL thread tension (red).

The needle thread (green) forms loops on bottom side of the fabric.

  1. Increase the RN thread tension (green).

The fabric edge doesn't curl as intended.

  1. Increase the cutting width CW.
  2. Increase the LL thread tension (red).
  3. Increase the UL thread tension (blue).
  4. Reduce the stitch length SL.
  5. Check the rolled hem lever N/R position.

The seam puckers.

  1. Set the differential feed between 1 and 0.6 (Stretching).
  2. Reduce the RN thread tension (green).
  3. Reduce the stitch length SL.