Baby Lock PRESTO Instruction And Reference Manual

Contents

TroubleshootingAppendix A-15MAINTENANCE AND TROUBLESHOOTINGANeedle breaks. Stitch length is too short. Adjust the stitch length. B-36Bobbin thread is incorrectly wound. Use a correctly wound bobbin. B-12Upper threadbreaks.Machine is not threaded correctly (used thewrong spool cap, spool cap is loose, the threaddid not catch the needle bar threader, etc.).Rethread the machine correctly. B-18Knotted or tangled thread is being used. Remove any knots or tangles. –The selected needle is not appropriate for thethread being used.Select a needle that is appropriate for the typeof thread being used.B-25Upper thread tension is too tight. Adjust the thread tension. B-37Thread is tangled. Use scissors, etc., to cut the tangled thread andremove it from the race, etc.A-5Needle is turned, bent or the point is dull. Replace the needle. B-26Needle is installed incorrectly. Reinstall the needle correctly. B-26There are scratches around the opening in theneedle plate.* There is a notch on the left side of theopening in the needle plate. This is not ascratch.1 NotchReplace the needle plate, or consult yourauthorized Baby Lock retailer.A-7There are scratches around the opening in thepresser foot.Replace the presser foot, or consult yourauthorized Baby Lock retailer.B-28There are scratches on the bobbin case. Replace the bobbin case, or consult yourauthorized Baby Lock retailer.A-2Using improper needle or thread for theselected fabric.Check the “Fabric/Thread/NeedleCombinations” chart.B-25While sewing, the thread became knotted ortangled.Rethread upper and lower thread. B-12, B-18A bobbin designed specifically for this machineis not used.Incorrect bobbins will not work properly. Onlyuse a bobbin designed specifically for thismachine.B-12The thread istangled on thewrong side of thefabric.Upper threading is incorrect. Check the steps for threading the machine andrethread the machine.Be sure that the presser foot is in the raisedposition when threading the machine so that theupper thread sets properly in the upper tension.B-18, A-5Using improper needle or thread for theselected fabric.Check the “Fabric/Thread/NeedleCombinations” chart.B-25The upper thread istoo tight.The bobbin thread is incorrectly installed. Correctly install the bobbin thread. B-15, A-4Symptom Probable Cause Remedy Referencea