Pfaff hobbylock 2.5 Owner's Manual - Page 30

Trouble shooting Problem Fabric does not feed well Needle breaks Thread breaks Skipped stitches Irregular stitches Fabric puckers Irregular trimming Fabric jams Machine does not operate Solution - Lengthen stitch length. - Increase presser foot pressure for heavyweight fabric. - Decrease presser foot pressure for lightweight fabric. - Check the differential feed. - Insert needle correctly. - Do not pull fabric while sewing. - Tighten needle set screw. - Use a larger size needle on heavy fabrics. - Check threading. - Check for tangled or caught thread. - Insert needle correctly. - Insert new needle, current needle may be bent or have a blunt point. - Use high quality thread. - Loosen thread tension. - Insert new needle, current needle may be bent or have a blunt point. - Tighten needle set screw. - Insert needle correctly. - Change type or size of needle. - Check threading. - Increase presser foot pressure. - Use a high quality thread. - Balance thread tension. - Check for tangled or caught thread. - Check threading. - Loosen thread tension. - Check for tangled or caught thread. - Use high quality lightweight thread. - Shorten stitch length. - Decrease presser foot pressure for lightweight fabrics. - Check the differential feed. - Check alignment of cutters. - Replace one or both cutters. - Check for tangled or caught thread. - Compress thick layers of fabric with conventional machine before sewing with overlock. - Connect machine to power source correctly. 30 Maintenance