Top stich perfict but bottom stich too loose on vivo singer machine 1004
Your bobbin tension needs adjusting, and although it is not hard to do and doesn't require that you take the machine apart, you MUST do it systematically. If you don't, you'll make things worse.
First, download the user's manual from the Singer site if you don't have one. On page 20, you'll see a discussion regarding tensions, and what improper tension looks like. Tension is a balance between the top and bobbin.
Then, using scrap fabric, set your top tension on Auto and make sure your needle is all the way up in the clamp. Run a line of straight stitches, and next to it, run a line of zigzag stitches, maybe four inches, and examine it. The illustration on that page will show you what your straight stitches SHOULD look like. If your zigzag stitches show one side that looks like "chicken tracks" but the other side looks like it should, the chicken tracks side is too tight. In your case, if the bobbin is too loose, the top will look like chicken tracks. It helps a lot to use two different thread colors, as well as a third for the fabric.
To adjust the bobbin tension, you will need a tiny straight blade screwdriver. If you have an indication that the bobbin side stitches are too loose, take the bobbin case out of the machine and locate two screws on the side. One is a Phillips--don't touch it. The one on the left of the Phillips is a straight-slot screw--that's the one you want. The saying is "lefty loosey, righty tighty." If your test indicates the bobbin tension is indeed too loose (which can happen over time), you need to tighten it by turning the screw 1/4 (ONLY) turn to the right (righty-tighty). Test again. You should see at least some improvement to indicate you're on the right track, and repeat--turning ONLY 1/4 turn--until your top and bottom tension are balanced. Don't forget to also test with a zigzag; I have adjusted bobbin tensions in the past that looked OK on the straight stitch, but the zigzag indicated I wasn't quite there yet.
Jun 25, 2014 |
Singer 2638 Mechanical Sewing Machine