Thread tension?

Greetings ... I have an old SEW-MOR that usually works great ... however, I
changed thread recently to a heavy weight. The bobin tension is "firm" but
not tight. I loosened it but it was too loose so I tightened it again to
the original tension. I increased the the upper thread tension and that
helped a bit but it's still not perfect.
Any thoughts?
thanks! wendy
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Probably the thread is to heavy for the machine. Home sewing machines will not sew at least well with upholstery weight thread.
Reply to
Ron Anderson
On Mon, 9 Jun 2008 10:37:24 -0400 in alt.sewing, "Ron Anderson" wrote,
I'm not sure I can parse that sentence. My Montgomery Ward machine sews very nicely with Guterman upholstery thread.
Reply to
David Harmon

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