Capturing the lower bobbin thread and fixing problems issues
- at 1:05 notice how the shuttle is passing 'above' the bobbin thread, that's why the bobbin thread needs to hang freely down inside.
- remember to fully engage/lock in place the two plastic locking tabs for the shuttle securing ring - as shown in the video, notice the position of the two tabs on the securing ring, there is a small bump on which the locking tab will lock
Reasons for thread not catching
More reasons why the needle doesn't catch the thread or it's skipping stitches
- bits of fabric trapped around the shuttle or under the feed dogs - remove shuttle, make sure you find videos showing how to place it back for your machine
- bent needle
- needle not fully inserted upwards or not inserted with the flat side the right way
- thread passed the wrong way inside the needle eye (usually it goes from left tor right)
- bobbin thread not inserted correctly into the bobbin
- wrong type of needle or wrong type of bobbin
- needle holder not secured at the correct position on the needle bar - usually it has a groove on the bar
- bobbin case not fully inserted on the small shaft (must lock)
- bobbin case ring holder not properly locked in place with the two small plastic tabs
- wrong bobbin case - may not be compatible even between same brand
- needle bar rotated - the needle eye is not parallel to the side of shuttle hook (loosen and rotate the needle bar, carefully not to move it vertically)
- damaged tip of the shuttle hook after impact with the needle (replace the shuttle)
- needle bar too low or too high https://rumble.com/v6kgx6a-needle-timing-position-and-depth-verticalside-bobbin-sewing-machine.html
- needle and shuttle out of timing (synchronization) after sewing thick/stiff materials, also check for loose screw on the gears or on the rod connected to the gears https://rumble.com/v6kgx6a-needle-timing-position-and-depth-verticalside-bobbin-sewing-machine.html
- damage to the gears actuating the shuttle
- bobbin case and shuttle laterally misaligned - hook passes too far from the needle sideways - the part keeping the hook is secured on its rod with 1-2 screws, loosen them and move the piece a little along the shaft
- both the bobbin and the needle thread must be left hanging free (no tension)
- presser foot must be lifted
- handwheel is usually rotated by hand with top of the wheel coming towards you
