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skytribe

Singer 112W140 double needle

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http://www.parts.singerco.com/IPsvcManuals/212W140.pdf

Here is a link to a newer model 212w140. It's mostly the same as the older 112. Look around for other Singer 212 and even 312 manuals, they are all mostly the same in the areas of timing and tension. A lot of getting tension correct is experimentation. Most of the differences in sub models is feed type, reverse and stitch length. Mostly they are the same.
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I have the 112W140 that I just finished rebuilding. With a better description of what is causing the issues I might be able to give you some advice. Although a lot of the parts can work on both I don't find the 212 to be _that_ similar.

-Michael

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Anyone with experience of these able to provide some advice with setting up on these machines.

Having problems with getting the tensions/timing and the manual is a really old bad photocopy which isn't clear.



The 112W140 is quite different than the 212 series machines with regard to the hooks and bobbin case openers.


To check the timing,(as with most machines) simply rotate the hand wheel forward until the take-up lever is at it's highest point. Now check to see if the timing mark on the hookshaft is aligned with the arrow or pointer. This is a check to make sure the mainshaft is in time with the hookshaft.

Next, set the hook to needle clearance.

Next, set the hook timing.

Next is needle bar height.

Last up is the bobbin case openers. These are cam operated, so make sure the eccentric is not worn out.(The eccentric is made onto the hook shaft)
These are set to just open or rotate the bobbin case ever so slightly, just enough for the top thread to pass though.


MEL
Skyworks Parachute Service, LLC
www.Skyworksparachuteservice.com

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I have a 212w140 that I rebuilt about 4 years ago and have been using it fairly regularly. I find it fussier than the 112 or Necchi double needle machines I have also played with. If you are observing an issue, throw it on here and I'm sure there are enough folks here to walk you through it.

The biggest 'gottcha' I had when I began to understand mine was the result of the previous owner doing his/her own machine work - the top tension plate had a brazed extension and the rod that connected the foot lift to the tension release lever was an undersized piece of rod stock, cut at a 45° angle with tin snips, and would release the right needle thread slightly during the needle stroke. That was about 3 nights of playing with it to figure that one out. :S

=========Shaun ==========


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