Pfaff creative 4874 Owner's Manual - Page 113
thread overlock seam, Stitch program 18
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Thread Tension 4-thread overlock seam Stitch program 18 If all the thread tensions are set correctly, the looping of the two looper threads (red and yellow) meet right at the edge of the fabric. The upper looper thread (red) appears on the underside of the fabric. Adjust the red thread (upper looper) tension to a higher setting and/or lower the yellow thread (lower looper) tension. Thread tension setting too low. The lower looper (yellow) appears on the upper side of the fabric. Adjust the yellow thread (lower looper (yellow)) tension to a higher setting and/or lower the red thread (upper looper) tension. The needle threads (blue and green) are too loose, causing large loops of needle thread on the underside of the fabric. Set the blue and green thread tension to a higher value. 7-7
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