Juki LU-563 floating stitch lever

[Gregg From Keystone Sewing]

On 7/5/2016 at 2:42 PM, Darren Brosowski said:

Could be as simple as the feed dog rubbing on the needle plate.

Check that the spring on the stitch lever is secure and not floating around

 

This is what I would look for 1st, feeder is bumping something.

[spenzher]

So, I've been tackling this issue still for a while. I've tinkered with everything I could and don't really have a definitive answer. Everything is in spec, it sews perfect, but the reverse lever still has some wiggle when I sew from like 5 to 6 (on the dial, is like 5.5 to 4.5 sitches per inch, max stitch length) . I know the dial indicator can be adjusted too far where the feed dogs will hit the sides, so I've adjusted it so it won't. I can also hold it from moving without any ill effects. The spring is definitely weaker the more the lever can travel upward. 

[sandyt]

I had the same problem a few times. Don't recall the solution and wich machines though. 

In my case it was something like the stitch lever being ofset. The eccentric wasn't set properly. At the end off the feed motion the lever would jump up a little bit, like going in reverse a small bit. Adjusting the lever corrected this issue if I remember correctly. 

Hope this helps.

Sandy.

[spenzher]

2 hours ago, sandyt said:

I had the same problem a few times. Don't recall the solution and wich machines though. 

In my case it was something like the stitch lever being ofset. The eccentric wasn't set properly. At the end off the feed motion the lever would jump up a little bit, like going in reverse a small bit. Adjusting the lever corrected this issue if I remember correctly. 

Hope this helps.

Sandy.

Sandy, 

Thanks for the suggestions. How was the lever offset? Like the vertical position it was in? And which eccentric? 

Thanks, 

Spencer

[Wizcrafts]

I had the same problem on an LU-563 I used to own. Apparently, the stitch lever is held down with a spring. If the spring wears out the lever will float as you increase the speed. Contact a Juki dealer for help and a new spring.

[sjharumph]

Old thread I know but if it helps someone the way it helped me...    New to me Juki LUH-521.   Adjusted stitch length to max and reverse lever started jumping w/ machine making noisy tick.    No tick or jumping when adjusted to 'normal' stitch length.  Took Uwe's advise and removed belt, turned slowly by hand and found the issue.   User side of Feed dog hitting machine casing.    Ground off enough of feed dog to clear the casing when set at max stitch length.    Now it's smooth sewing w/ any stitch length I want.    Ground enough material to allow for higher feed dog adjustment if ever needed.