335 “hanging up”during cycle

[Hockeymender]

My 335 that is a dedicated binder has a problem I can’t get solved. When the needle enters the feed dog and the inner presser foot starts it’s rearward motion there is a terrific “bind” that occurs that even produces a groan out of the machine. This has its roots in the lifting motion of the outer presser foot. With the outer presser foot up, there is no problem cycles smooth as butter. Drop the outer presser foot and the trouble is there. I was advised the presser foot bar may be bent, so I replaced that, no joy. I have spent countless hours trying to get this sorted. Any and all help welcome  

 

 

 

 

 

Edited March 3, 2018 by Hockeymender

[Uwe]

I'd check for walking foot lift linkages touching the casting. I made some annotated pictures for previous topics on foot lift related binds.

I don't know if your 335 with the bind problem is a modern casting 335 or a vintage casting. They have very different casting and things may look quite different. The pictures below are of a Singer 111W155 machine, but they illustrate the concept of the two types of potential binds due to out-of-range linkage movements.

 

 

 

Edited March 3, 2018 by Uwe

[Hockeymender]

I have spent the last hour trying to upload a video I shot on my iPad Pro of this problem, but I’m having about the same luck with that as I am the 335. It’s the old casting BTW..

[Constabulary]

do you have the binding in different stitch length or is it probably just the longest? Maybe foot lift is too high during cycle? I´d try reducing the stitch length a bit and try to lower the foot lift during cycle - both just a guess.

[Hockeymender]

8 hours ago, Constabulary said:

do you have the binding in different stitch length or is it probably just the longest? Maybe foot lift is too high during cycle? I´d try reducing the stitch length a bit and try to lower the foot lift during cycle - both just a guess.

The bind occurs when the machine is set for the highest lift, stitch length does not seem to factor in. Even when the lowest lift setting is used there is a very slight bind, but you could almost miss it. 

[Uwe]

Post some close-up pictures of all the linkages involved (external and internal) in lifting the foot. Max lift is normally when needle is at bottom dead center, but your bind appear sto start much earlier. Since the problem disappears when you raise the feet, the source of the problem is very likely found in the parts that move when you raise the feet. Put the machine in the position where it starts to bind, then raise the feet and closely observe all the linkages moving. I have a strong feeling that something will be moving away from something else, changing from touching to not touching (other than the obvious feet moving away from the throat late.)

[Uwe]

I suppose the problem could also originate in the arm when downward pressure is applied to the feed dog (which is relieved when you raise the feet). Perhaps try raising the feet and press down on the feed dog with your thumb and see if the groan/bind manifests (remove the needle for this test).

[Hockeymender]

24 minutes ago, Uwe said:

I suppose the problem could also originate in the arm when downward pressure is applied to the feed dog (which is relieved when you raise the feet). Perhaps try raising the feet and press down on the feed dog with your thumb and see if the groan/bind manifests (remove the needle for this test).

That’s something I was wondering about. I have another set of binder feet (including the throat plate) and I will try those and see if there are any changes good or bad. 

 

[DonInReno]

I just changed out the needle plate last night on a walking foot 111w and noticed a slight bind just as the inner presser foot touched down - similar to what you described.  In this case it was the feed dog binding against the bottom of the needle plate - the feed dog peaks about the same time the presser foot touches down.  Loosening the needle plate screws a bit is an easy way to check for that.