HELP tension issues on 111w walking foot

[kevinkay]

From MUCH help on this forum I restored this machine and got it running (well sort of).   Good stitches with "regular" thread but when I use the thicker thread its bird nesting on the bottom as if the top tension is too loose - I tighten it and then of course it breaks.

first - am I setting bobbin tension correct? -  I was taught on my domestic machine, the bobbin in the cup of your hand pulling the tread it should upright the bobbin and then start to roll.

On the duel tension disks, the lower one with the spring - should that spring dance up and down as you sew?  and the adjustment screw there is for what?

THANKS!

Edited October 11, 2019 by kevinkay

[Pintodeluxe]

Certainly if anything is amiss with your thread path, or the needle isn't matched to the thread.. would be the easy things to make sure of first.  Then adjust the bobbin tension for a light, steady tension.  Then readjust the upper tension to balance the stitch.

I've encountered broken tension mechanisms that needed to be replaced.  No amount of adjusting will fix a broken tension mechanism.

As far as the "Dual tension discs" only one is for tension, the other one is a check spring.  It should move up and down as you sew.  

[kevinkay]

THNAKS!

[ljk]

One thing I don't seen mentioned is a obstruction under the bobbin case.  The thread path of the

needle (top thread) has to make that trip around the bobbin case.  What can happen is

fluff from sewing, thread jamming causing thread bits and pieces, will eventually cause a

obstruction.   Remove the jib  and remove the bobbin case. 

Clean under and return the bobbin case.  The small screws must not be lost.

I have a coffee can full a old hooks and none of those screws seem to fit another.

Thin thread like #46 or #69 make make the trip but #92 won't.  Next issue is

a properly adjusted thread release.   Finally do the YouTube 111w155 howto

videos.