I think the timing is off on the bobbin thread, that is, needle is threaded properly, etc, but it won't make stitches. The model is Singer 478. It was working fine until I attempted to sew some very thick suede backed faux fur.
Hello Miranda,
Did you ever get your timing sorted out ?.
Ken
drivewithken@blueyonder.co.uk
July 2007
http://www.tandtrepair.com/StylistLine.html has a couple useful things. They have a online troubleshooting guide which can help you decide if timing is causing your problem or some other adjustment. The URL also sells the adjustment guides for a modest price.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix sewing machines.