Singer 111w155 stitch length issues

[Glaciersew]

Hello

New Guy w another newbie issue. I’ve only had this machine a few weeks. Went ahead and set the timing, added a servo motor and it’s been great. Adjusted the stitch length a few times and that’s where trouble began. 

First off this machine doesn’t have a hole in front to show the numbers. Looking down through the top i noticed that the length indicated didn’t line up w a measured stitch. Really not a big deal. So at that time the machine was working just fine 

Last night w 2 short stitches to go in a project the stitch length went from approx 6 stitches to 32. I stopped made the adjustment back to 6 and then it did it again. The concentric doesn’t seem to be holding its position.

what keeps the concentric locked in place? 

 

Thank you

[CowboyBob]

There's a locking screw that holds the adjusting screw.The locking screw at the end of the pen, the screw you need to tighten alittle is @ the end of the screwdriver.There's 2-screws on the feed cam that push on a narrow piece of metal in the feed cam we call a gib, just loosen the locking screw & then you can tighten the adj screw until it's snug,if you overtighten it it'll make the stitch length harder to impossible to change.Don't forget to tighten the locking screws when you get done.

[Uwe]

1 hour ago, CowboyBob said:

The locking screw at the end of the pen, the screw you need to tighten alittle is @ the end of the screwdriver.

Thanks for that dose of comic relief on a Saturday morning, Bob! One more cup of coffee should do it.

 

That feed eccentric mechanism is indeed a confounding, yet brilliant, piece of engineering. I've been procrastinating making a video about it because the task is daunting. I do have a Singer 111W155 on the workbench with a stuck feed eccentric. Maybe I'll get the camera rolling as I work on it this weekend.

[Glaciersew]

Thank you guys. I had this machine working perfectly last week. Well so long as I didn’t change stitch length.

Timed w Uwe’s video, BTW the quality of your videos are amazing, and she was spot on. No issues at all. I tried changing stitch length last week and noticed the stitch length indicator wasn’t even close. Had to watch the eccentric and eyeball it. Last night it just started moving around on its own.

just came in from trying the adjustments y’all recommended. The locking screws are the smaller screws. And the larger screws were use for adjustment. Correct?its difficult to tell in the singer manual. No luck. Now after attempting to set a stitch length I’m back to square one. 

[Gregg From Keystone Sewing]

Using a small flat head screwdriver loosen the two #350562XC set screws on the feed driving eccentric regulator, then use the #350578XC adjusting screws to add friction.  Too much and you will not be able to use the push down button on the bed of the machine to adjust stitch length.  Too loose and it will fly in the wind out of adjustment like you stated.  Once you seem to have it corrected, tighten down the #350562XC set screws and you are done.

[Northmount]

Merged the two threads.

Tom

[Uwe]

Thank you @Northmount!

Here's a brief rough cut of a video snippet that shows how to adjust the friction gib on the feed driving eccentric. This snippet is just temporary and has some audio and focus problems. I'm still working on a "proper" video that goes over the whole assembly. I'll delete this temporary video once I get the final version published.

 

[Glaciersew]

Once again Thank You!!!!! Y’all are incredible! 

Figured out the locking and adjusting screws earlier today. Im not sure how it happened but the belt appears to have jumped a tooth. Appears to be a relatively new rubber belt. Thanks to Uwe’s Consew 226 video I was able to get it back in time. Also found out that the eccentric gib locking screws weren’t in the groove. Needless to say EVERYTHING has been adjusted! 

Currently working on the hook timing. Once again one of Uwe’s videos is showing me the way.

Not sure what it is but something has been binding. Didn’t think it was enough to be concerned about. The plan was to put it on the “list” of things to do. Well w all this tinkering it’ll proabbaly get torn down and diagnosed this week. 

[Glaciersew]

Mission accomplished! The orientation of the set screws in the groove for the eccentric is key! 

 

Thanks you all for your time and the sharing of knowledge! 

[DonInReno]

Great information!