I used my mothers 1968 White when i started quilting, (never had any issues), a few years later I have a Janome 7700, a Singer Quintet, an old Brother embroidery, an old little Brother (belonged to my sister) a Bernete Bernina small machine and a 30 year old Singer....all of which i have become a 'service repairman ' on these..,the most expensive of the lot is the one I use all the time but let it get a small amount of lint build up in the bobbin area and it will NOT sew...nests, knots, gobs of thread build up on the back side of the material...take yours to a repair shop and and let them check it out...you may have a machine that is picky