Members vonL Posted March 19, 2021 Members Report Posted March 19, 2021 Hi all! My singer 111w153 has developed a knocking sound when sewing. It seems like material thickness is what's causing the knock, as it nearly dissapears when sewing thin stuff. I think the knock is coming from the horizontal shaft in the machine arm, maybe where it's connected to the outer foot rocking mechanism, but i am not certain of this. It's been sitting unused for a couple of months, until last week. I am sewing a carvers apron in medium to heavy cotton canvas, roughly 5mm thick when hemming double folded edges. Neck strap and chest panel is 1.8mm soft tempered vegtan, sewn flat against a single layer of canvas. I am using correct needles, and #92 thread, machine is well oiled. Can try to post a video this weekend. Quote
Members Constabulary Posted March 19, 2021 Members Report Posted March 19, 2021 you have that knock in all stitch lengths? Quote ~ Keep "OLD CAST IRON" alive - it´s worth it ~ Machines in use: - Singer 111G156 - Singer 307G2 - Singer 29K71 - Singer 212G141 - Singer 45D91 - Singer 132K6 - Singer 108W20 - Singer 51WSV2 - Singer 143W2
Members vonL Posted March 19, 2021 Author Members Report Posted March 19, 2021 I dont know, it did not cross my mind to check, will give it a go tonight. It sews fine, no problems. I am hoping to figure ut out before something breaks Quote
DonInReno Posted March 19, 2021 Report Posted March 19, 2021 What point in the needle’s movement does the noise happen? Quote
Members vonL Posted March 19, 2021 Author Members Report Posted March 19, 2021 Almost exactly on the needle's upward movement, regardless of stitch length, but without a doubt affected by material thickness. At first I thought it had something to do with timing, or the hook or bottom thread, but when sewing with the coverplate open everything seems fine. Mysterious.... Quote
Members Ole South Posted March 19, 2021 Members Report Posted March 19, 2021 (edited) Have you checked the basket/hook retaining set screw? Edited March 19, 2021 by Ole South addition Quote
DonInReno Posted March 19, 2021 Report Posted March 19, 2021 Could your presser foot pressure be too light and the material is being lifted up off the plate and falling down as the needle pulls out of the material? If not that, it’s hard to picture which linkages might be binding, but I’d be tempted to to take the cover off, put the needle at the point things are binding and try to pass a slip of paper between the various bits in there. Quote
Members vonL Posted March 20, 2021 Author Members Report Posted March 20, 2021 Here is a short clip of what's going on. The canvas is 4 layers thick on both edges of the piece, 2 layers in the middle. Notice how the knock fades and is more or less gone when I'm sewing in the middle. The canvas I'm using is quite soft, I'd say it is comparable to 14oz denim in thickness. I think my singer 201k or any decent commercial sewing machine would have no trouble going through this with a #18 needle and high rpms. I'll do some investigating this weekend, and post my results Quote
Members Ole South Posted March 20, 2021 Members Report Posted March 20, 2021 (edited) I experienced something similar while trying to optimize the presser foot lift on a 111w155. (Never quite made it to 1/2inch but that's a different story). Inner and outer foot leverage/pivot off each other to lift. To quick test if this may be an issue in your case: slide a strip of 3-5 oz leather(like a strap)under JUST the outer foot (one side is all you need to test this) and let it "walk higher" than the inner presser foot(which now is the only foot touching your canvas). My w155 is 1954-56 and was a parts machine when I got it. And yes... I have to re-set up the machine when switching from leather to canvas/jeans material. (I have always attributed this to my attempts to maximize/meet original specs) Edited March 20, 2021 by Ole South clarification Quote
Members vonL Posted March 20, 2021 Author Members Report Posted March 20, 2021 How come You have to set your machine up when You go from leather to canvas/denim? Slack/worn parts leading to it not meeting factory specs? Quote
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