The most common causes are hook timing and bobbin tension. Try reducing the bobbin thread tension slightly. Then check the needle-to-hook relationship — when the needle reaches its lowest point and begins to rise, the hook tip should pass just above the needle eye. Your instruction manual has a detailed diagram.
The thread trimmer is not working properly or the thread gets jammed.
Thread trimmer issues can be caused by incorrect cam timing or a knife that needs adjustment. We recommend emailing support@prizzisewing.com with a short video showing exactly when the problem occurs.
My machine's thread trimming knives seem dull or are not cutting cleanly.
If the thread trimmer is leaving long tails or not cutting, the knives may need repositioning or replacement. Check the knife alignment per your instruction manual. This is a delicate adjustment — email support@prizzisewing.com with a short video if you need guidance.
The foot pedal feels stuck or does not respond smoothly.
Check the pedal mounting brackets — they may need to be spread slightly apart. Make sure there is no debris caught around the mechanism. Verify that the cable connecting the pedal to the control box is fully seated. Email support@prizzisewing.com with your machine model and a description of the behavior.
My machine starts on its own or runs uncontrollably when I press the pedal.
Turn off the machine immediately and unplug it. Check all connectors between the pedal, control box, and motor. If the issue started after initial setup, double-check the wiring against the diagram in your instruction manual. Email support@prizzisewing.com. Do not use the machine until resolved.
The feed dogs are not moving correctly or are out of sync.
Turn the handwheel by hand with the machine off and observe whether the feed dogs rise, advance, and drop back smoothly. If the motion is jerky, the feed dog drive may need adjustment. Check for thread or debris jammed underneath the needle plate. Email support@prizzisewing.com with a video.
My machine is leaking oil or there is too much oil coming through.
The oil flow may be set too high. Check the oil regulator setting in your instruction manual and reduce the flow. Verify you are using the correct type of oil (liquid sewing machine oil only). If the leak is from a specific area, wipe it clean and run briefly to identify the source. Email support@prizzisewing.com with photos.
The drive belt is rubbing against other parts or seems too loose.
Check the belt tension per your instruction manual — the belt should have slight deflection when pressed. If rubbing against fixed parts, reposition it so it runs freely. If you cannot achieve proper tension, you may need a shorter replacement belt. Email support@prizzisewing.com with your machine model.
My machine makes a loud click or snap sound when I start or stop sewing.
This is often related to the thread trimming mechanism, the auto foot lifter solenoid engaging, or the reverse mechanism activating. In most cases, this is normal. If the sound is louder than usual or accompanied by an error, check for loose parts and email support@prizzisewing.com with a video.