Originally Posted by
mikec
Well, I think I finally found the problem. Top tension. After disassembling and reassembling the shuttle, checking that every joint is oiled, I decided it had to be a setting. So, I basically tried every combination of bobbin tension, and upper tension. I found that the higher the top tension, the less the underside bunching. My only problem now is that I have the top tension at max (10), and I am getting 97% good stitches. I imaging an 11 or 12 would get me 100%
Only problem is that there is no 11 or 12... So I am thinking that my top tension adjuster is bad, worn out spring perhaps? I'm going to see if I can replace the assembly before I start sewing my $1000 boat canvas. I finally see light at the end of the tunnel!
Thanks again for all the helpful suggestions.
One more request: A recommendation for a good place to buy a tension assembly online? :-)
Edit: Never mind. I found one on singeronline for a whopping $6.00!
Here is a link for rebuilding your tension. Some times if the spring is dead or just out of it's setting it will not adjust. This manual is the best I know of. I have walked through with this one and gotten several fixed very quickly. A new tension may or may not fix the 'real' problem. If you do rebuild, go slowly and carefully follow the directions. Keep track of the parts Here is a link to the tension repair manual:
http://www.tfsr.org/pub/technical_in...echanism_2.pdf ALSO
www.sew-classic.com has the spring for less than $1 - Jenny has other parts as well - great service, too.