Pfaff hobbylock 4764 Owner's Manual - Page 30

5. Sewing problems and their solutions If the machine is used under normal conditions and the operating instructions are carefully followed, no difficult or special adjustment is necessary. Following cases are not failure of the machine. Check your machine before you call for service. Problem Machine does not sew Machine does not feed properly Needle breaks Breaking threads Skipping stitches Irregular stitches Cause Solution • Not plugged in properly • Pressure on the presser foot not sufficient • Differential feed not set correctly • Bent or dull needle • Needle inserted incorrectly • Pulling the fabric too firmly while sewing • Improper threading • Thread tension(s) too tight • Incorrect tension setting of needle • Bent or dull needle • Needle inserted incorrectly • Improper threading • Plug the cord into the electrical outlet and the machine properly • Increase the pressure by tightening the adjustment screw • Adjust the differential feed • Insert new needle • Reset needle • Do not use force to pull the fabric • Rethread the machine • Reset thread tension(s) • Reset needle/change to new needle • Insert new needle • Reset needle • Rethread the machine • Tension not adjusted properly • Check thread tensions Reference page 6 14 16 8 8 12 8-10 14 8 8 8 8-10 14 • Needle thread tensions are • Loosen needle thread 15 Puckering too tight tension • Improper threading • Rethread the machine 8-10 • Set differential feed 16 between 0.7-N 28