Feed Dog movement isn't smooth - Triple Transport

[marinicarlo]

I have the sewing machine in the video. As you can see the movement isn't good. The machine is a fantastic (for me at least) necchi 840 (industrial).

if i remove the foot on the right ..then the noise disappear and the movement is right...

So i suspect some tuning around foot / needle and feed dog is needed.

Any thoughts?

thank you for your help !!!

 

[Northmount]

1 hour ago, marinicarlo said:

I have the sewing machine in the video.

You can take a longer video and post on YouTube and post the link to it here.  Might be able to see and understand better.  You can show with different foot positions so we can see the difference in behaviour.

[marinicarlo]

here we go ! thanks

 

Edited Thursday at 09:59 PM by Northmount
Made link active.

[Northmount]

43 minutes ago, marinicarlo said:

here we go ! thanks

Auto Correct must have got you "dog food issue" for video title!

The inner foot and feed dog are moving (feeding) together while this noise occurs.  But you say it doesn't when you have the opposite foot on.  Is that correct?  Are the outside feet the same length?  Sounds like it inner foot and feed dog are being highly stressed.  Does the hand-wheel become hard to turn during that part of the cycle?  The feed dog looks like it is tight against the right side.

The sewing machine guys with all the experience should be along soon.

 

[marinicarlo]

wow.. sorry for the misspelled title.

i confirm that the hand-wheel become hard to turn during that part of the cycle.

If I remove the inner foot then everything goes smoothly - see video

maybe the inner foot is pushing very hard to the feed dog preventing the right smooth movement..

Edited Thursday at 10:39 PM by marinicarlo

[Northmount]

3 hours ago, marinicarlo said:

maybe the inner foot is pushing very hard to the feed dog preventing the right smooth movement..

Definitely!  It has to have room for leather under the foot too!  Do a search for balancing the inner and outer feet for your machine, check for instruction manuals.

@Wizcrafts this fellow could use some help if you can fit it into your day.

[AlZilla]

Some history might help the big dogs when they show up. Is this machine new to you and acting this way or have you had it and it was working fine?

Also, it sounds like yo have 2 presser feet, one of which works and one that doesn't. If so, is there a difference in length between the 2?

[marinicarlo]

hi @AlZilla the machine is very old I have been using it for at least 5 years. my impression..is that it was working better "before".

I have just 1 presser feet...and when i remove it (no presser feet on) then the movement is ok

 

thanks !!

[CowboyBob]

Sounds to me like you've missed a spot when you oil?Re-oil everything you can esp on the arm.

[marinicarlo]

Hi there I will recheck ..and oil again....i still believe something is wrong in the tuning..i will try anyway THANKS

[Northmount]

7 hours ago, marinicarlo said:

hi @AlZilla the machine is very old I have been using it for at least 5 years. my impression..is that it was working better "before".

I have just 1 presser feet...and when i remove it (no presser feet on) then the movement is ok

thanks !!

There is some confusion here.  Presser feet for this machine (walking foot) come as a pair, inside foot, and outside foot.  Don't refer to them as left and right.  Your outside foot is with a left toe.  They are available as right toe and with both toes.

When he removes the inside foot, there is no binding, no noise, easy to turn the hand-wheel.

[toxo]

Definitely out of sync.  Maybe you jammed it up at one time and threw it out. You need to do two things. 1st, find out what's making that noise and 2nd, go through each stage of the sewing procecess and make sure everything is as it should be. It's easier with a manual of course but many things are common sense such as the feed dog having clearance all the way round in foreward and backward positions. Is the needle clear of the hook and does the hook point reach roughly just above the needle eye at the right time? Usually when the needle is on the rise. Needle and presser foot bar adjustments for each machine are above my pay grade I'm afraid but the big guns will be along shortly I'm sure. Good luck.

[AlZilla]

This thread indicates your machine is a clone of the Pfaff 335. Maybe finding a manual for the 335 will give you some clues to look for?  If oiling doesn't help, it does seem that something has moved on you.

 

 

[marinicarlo]

HI there I fixed the problem thanks a lot for your tips.

It was definitely an oiling problem. This is exactly the point that was missed and caused the noise...

 

thanks

 

 

On 2/14/2025 at 5:35 PM, Northmount said:

There is some confusion here.  Presser feet for this machine (walking foot) come as a pair, inside foot, and outside foot.  Don't refer to them as left and right.  Your outside foot is with a left toe.  They are available as right toe and with both toes.

When he removes the inside foot, there is no binding, no noise, easy to turn the hand-wheel.