Pfaff hobbylock 788 Owner's Manual - Page 43

Prob'em Machine does not run although master switch is on Fabric not neatly trimmed Puckered seams Puckered seams Edge thread too loose Cause So'ution Power supply interrupted looper cover 1 0 or work support 1 2 (see p. 7( Close looper cover 10 or work support 1 2 (see p. 7( Sewing lint between upper and lower knife Upper knife blunt Clean knives (see p. 32) Exchange upper knife (see p. 30) Thread tension too tight Incorrect setting of differential feed Thread has caught due to incorrect threading Reduce thread tension (especially for light materials) (pp. 15-16) Re-adjust differential feed Thread correctly (pp. 7-11) Inadequate sewing foot used for seam width sewn Insert sewing foot adequate for the seam width (see top of p. 35> Inadequate sewing foot used for seam width sewn insert sewing foot adequate for the seam width (see top of p. 35) 41