Noisy Juki LU 562

[shoepatcher]

A whine at high speed might indicate a bearing going bad.  I would oil the snot out it, let it set for 24 hours and then try it again.  There may be an area that was missed when oiling so check the manual.  Should be the same as a Singer 111W155.

glenn

[Constabulary]

Maybe its the hook driving gear. Maybe a lack of oil? I´d oil the machine generously. Check the manual for that.

[fibersport]

I'm going to suggest looking at anything that rotates, any excessive clearance will make that type of sound on other mechanical things.  Have you looked for excessive backlash in the gears underneath - and I'm assuming the Juki's ahve gears.

[AlZilla]

We'll often use a stick as a stethoscope when trying to isolate strange sounds on a piece of running equipment. Maybe a dowel rod to your ear and touch different areas of the machine? 

Possibly you could at least track it down to left/right/top/bottom ...

[DieselTech]

14 minutes ago, AlZilla said:

We'll often use a stick as a stethoscope when trying to isolate strange sounds on a piece of running equipment. Maybe a dowel rod to your ear and touch different areas of the machine? 

Possibly you could at least track it down to left/right/top/bottom ...

Also a plastic handled long screw driver works good. Put the tip of the screwdriver on the suspect area & put you ear on the end of the plastic handle. 

 

[Northmount]

17 hours ago, AlZilla said:

We'll often use a stick as a stethoscope when trying to isolate strange sounds on a piece of running equipment. Maybe a dowel rod to your ear and touch different areas of the machine? 

Possibly you could at least track it down to left/right/top/bottom ...

Can also use a piece of hose to help determine where the sound is coming from.  Hold one end to your ear and mover the other end around to find the vicinity of the source noise.  Direction finder!

Then use the dowel or screw diver or stethoscope to hear the noise with more 'detail' or 'clarity'.

On 10/3/2024 at 12:50 PM, DG1 said:

at higher speeds makes an irritating  higher pitch vibrating/chattering noise as if something is loose

After may years of vibration monitoring, trending and analysis, this sounds like gear noise.  I expected 'higher pitch' to be more of a high pitched squeal, but from your video, not high pitched, but changes with speed.

I'd be checking the lash on the hook gear set.

 

 

[DG1]

On 10/5/2024 at 8:34 AM, Northmount said:

Can also use a piece of hose to help determine where the sound is coming from.  Hold one end to your ear and mover the other end around to find the vicinity of the source noise.  Direction finder!

Then use the dowel or screw diver or stethoscope to hear the noise with more 'detail' or 'clarity'.

After may years of vibration monitoring, trending and analysis, this sounds like gear noise.  I expected 'higher pitch' to be more of a high pitched squeal, but from your video, not high pitched, but changes with speed.

I'd be checking the lash on the hook gear set.

 

 

Is is possible to adjust the lash on the hook gear set on this machine?