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Thread tension question
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saltoricco View Drop Down
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Posts: 10 		  Quote saltoricco Quote  Post ReplyReply Direct Link To This Post Topic: Thread tension question
    Posted: 06 June 2009 at 1:23am
Hi yall,

I have trouble adjusting the thread tension on my Brother 652 when sewing Dacron sails. One thing is the tension is pretty close to max on upper and lower thread. And still the zig zags are not quite as tight as they should.

Here is a sample that I hope shows the problem:

This the top view. It looks like the upper thread tension is set too high, right?



But when you turn around the piece, you'll see the upper thread is pulled down on those zig zags that have a normal step length.




Maybe the samples isn't good because the grosgrain tape crumples a little under the thread tension. But I'm seeing the same, just not as pronounced, on sails.

Any ideas? Thanks a lot guys!

Holger
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saltoricco View Drop Down
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Posts: 10 		  Quote saltoricco Quote  Post ReplyReply Direct Link To This Post Posted: 06 June 2009 at 1:52am
Maybe I should add: this is a V-92 bonded Polyester thread on a #20 needle. The machine just came from the mechanic and should be all tuned.

Thanks,

Holger


Edited by saltoricco - 06 June 2009 at 1:52am
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MattGrant View Drop Down
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Posts: 1185 		  Quote MattGrant Quote  Post ReplyReply Direct Link To This Post Posted: 08 June 2009 at 12:02pm
You will not get good results in this thin of a assembly with this thick of a thread given the wide width of the zigzag. I would decrease zigzag width to resolve.
Thanks, Matt
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saltoricco View Drop Down
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Posts: 10 		  Quote saltoricco Quote  Post ReplyReply Direct Link To This Post Posted: 11 June 2009 at 3:29am
Thanks much for your response, Matt! Yes, I agree with what you said. I just used this part for the photo to get better color contrast.

I am now getting better results after replacing the upper thread tension spring with a stronger one. Anyway, now I can increase the upper thread tension and the seams aren't so sloppy anymore.

Thanks again, you guys are so helpful!

Holger
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Anna Lee View Drop Down
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Posts: 1 		  Quote Anna Lee Quote  Post ReplyReply Direct Link To This Post Posted: 17 November 2009 at 2:05am
Originally posted by saltoricco

Maybe I should add: this is a V-92 bonded Polyester thread on a #20 needle. The machine just came from the mechanic and should be all tuned.

Thanks,

Holger

Hi all, I am a new member of forum. Would a newcomer be warmly welcome here? Good day you guys!!!

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MattGrant View Drop Down
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Posts: 1185 		  Quote MattGrant Quote  Post ReplyReply Direct Link To This Post Posted: 17 November 2009 at 7:46am
Hi Anna,
Welcome to the Sailrite Forum!
Matt
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Best Regards,
Matt Grant
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