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Forum > Sewing Machines > Help a newbie out - loud clunking ( Moderated by Sharon1952, EleanorSews)

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Help a newbie out - loud clunking
Juki F600 makes clunking sounds when sewing
Jingerbell
Jingerbell
Beginner
Member since 7/26/10
Posts: 7
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Date: 8/9/10 8:32 AM

Hi everyone!

I've been lurking on these forums while deciding what sewing machine to purchase and ended up with the Juki F600.

I'm a total beginner and have found that when sewing anything more than one layer of thin cotton, the machine is making a clunking sound as it sews. The faster I sew, the louder the clunking gets, and also the more layers of fabric, the louder.

With 4 layers of thin cotton, the clunking becomes unbearably loud.

I have changed lots of different needles (all the ones that it came with as well as Schemtz universal 80/120), rethreaded it endlessly and nothing seems to work :(

*edit* this is a 2 day old machine so it doesn't need a clean but I have cleaned it just in case
Please help!
-- Edited on 8/9/10 8:40 AM --

okie2thdoc
star
okie2thdoc
Intermediate
Kansas USA
Member since 9/20/07
Posts: 1001
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Date: 8/9/10 8:42 AM

I can't help you fix it yourself. Rather, I'd recommend you take it back to the dealer and let them deal with it. You don't want to void the warranty. Mine had to be replaced shortly after I got it. I know this doesn't help you now but I'd hate to see you lose out.

------
I burn the candle at both ends and if it's not burning fast enough, I blow!

poorpigling

poorpigling
Advanced
Texas USA
Member since 12/28/07
Posts: 11066
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Date: 8/9/10 9:58 AM


Yes, don't mess around with it.. There is definitely a problem. take it back to the dealer. For the reason its new, I don't even want to make repair suggestions .. but I do want you to enjoy your machine.. so lug it back in and see what the problem is.. Most of the time its user error, but in this case, as its a new machine.. maybe not. in any case if its something on your end you need to know that too. LET us know please.

Jingerbell
Jingerbell
Beginner
Member since 7/26/10
Posts: 7
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Date: 8/9/10 10:07 AM

Thanks for the advice!
After further testing it seems the heavy/rough cotton I was using really exacerbated the issue.

More of a clicking with other fabrics. Will speak to shop tomorrow but won't be able to take it in till the weekend :(

Still hoping its just user error and I'm using the completely wrong needle or something.

Thanks again, will keep you updated!

NM gal
NM gal
Beginner
Member since 5/27/09
Posts: 1175
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Date: 8/9/10 11:35 AM

It wouldn't hurt to do the test sewing stitch on page 71.

Jingerbell
Jingerbell
Beginner
Member since 7/26/10
Posts: 7
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Date: 8/9/10 11:29 PM

Thanks NM gal, I will try that as soon as I get home.

I should also mention that even though it makes strange/annoying noises, it sews perfectly!

Susee
Susee
Intermediate
Member since 10/23/08
Posts: 427
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In reply to Jingerbell


Date: 8/10/10 2:33 PM

Jingerbell, I have the same machine, and it should not under any circumstance be making the loud clunking sounds you describe. My Juki F600 goes through way more than 4 layers of cotton without getting any louder. I concur with what others have said. Don't try to clean the machine or adjust anything; just take it immediately back to the dealer and have them troubleshoot the problem. If they can't solve the problem to your satisfaction, ask for a replacement machine.

------
Susie
Bernina 930, Lady Kenmore 89, Janome 300E, Juki MO-735, Janome 1000CP, Kenmore 19606, Janome Hello Kitty

Jingerbell
Jingerbell
Beginner
Member since 7/26/10
Posts: 7
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Date: 8/10/10 8:35 PM

Thanks everyone!

I will take it in this weekend to have it looked at.

Have narrowed the sound down though - its as the needle goes through the fabric, so the thicker the fabric the louder the sound!

poorpigling

poorpigling
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Texas USA
Member since 12/28/07
Posts: 11066
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Date: 8/10/10 10:58 PM

And so that makes me think the needle may be bending as you sew.. due to the weight of all that fabric.. this happens to me a lot when I do the heavy home dec sewing.. make sure you have it in straight... then listen when it first starts..if its okay..then it goes funny.. its probably the needles are bending. Even a slight bend of the needles can cause problems.
Am also curious if it does it at slow speeds.. Nevertheless it should not be doing this.. have it looked at asap.
-- Edited on 8/10/10 11:00 PM --

Jingerbell
Jingerbell
Beginner
Member since 7/26/10
Posts: 7
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Date: 8/10/10 11:38 PM

Making time to get it looked at tomorrow. It is literally driving me insane!

It does it at slow speeds, just not as noticable, but you can hear a distinct thunk as the needle moves.

Not sure if it matters at all, but manually inserting the needle through the thick fabric gets quite difficult too!

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