Singer 1120 Mechanical Sewing Machine "bottom stitch" Questions

Loose bottom stitches on Singer 1507 The top stitches seem ok, the bottom stitches at very loose. Adjusted the bobbin tension to high, no help. top tension must be adjusted to fix loose stitches of ...

the bottom stitching looks like a line and not stitches the top stitching is fine I have cut a piece of material on the bias and stitched on it. When I pull the material on both sides, the top ...

the bottom stitching looks like a line and not stitches the top stitching is fine I have cut a piece of material on the bias and stitched on it. When I pull the material on both sides, the top ...

...bottom stitch? how do i adjust tension on bottom stitch? There are tow places where the thread tension is adjusted. One is bobbin. This is not routinely adjusted. Just once and it is good for long ...

...bottom stitch is not straight? evenly spaced but irregular in alignment. Help? increase the needle thread tension the bottom stitch is a direct result of the needle movement pulling the bobbin thread ...

...bottom stitch all the way through it looks good from the bottom but not good on top. Its pulled the stitch all the way through the material. I had my own upholstery shop 18 yrs and tension gets you ...

...bottom stitch is inconsistent. Is the bottom tension to tight? If not , what could it be? My machine is a Singer 1120. Thanks for any help! Try sewvacdoctor.com and refer to handy problem list. Click ...

...stitch. Also, the bottom thread can be seen coming up through the top as well as the top thread can be seen coming through the bottom. I have tried changing the tension, thread, bobbin, material, ...

...bottom stitch is very loose. I've tried tightening and loosening the screw and the problem remains...HELP! The bottom stitch is affected by the TOP thread tension :) First go back and make sure your ...

...bottom stitch looks better The machine stitches, but it does not look good. I did some adjusting and the top stitch looks really good, but the bottom part of the stitch still looks bad. How do I ...