Oscillating hook sewing machines have a hook that, instead of rotating in a full circle, oscillates back and forth. In this system, the hook picks up the upper thread from the needle and carries it down around the bottom of the bobbin cage.
Where is the hook race on a sewing machine?
Location. The hook race is a circular groove that runs around the bobbin case. This groove or track allows the hook to travel in a circular path around the bobbin when the machine is in operation.
What is a horizontal rotary hook on a sewing machine?
The rotary hook (aka rotating hook) is a bobbin driver design used in lockstitch sewing machines of the 19th and 20th century and beyond. It triumphed over competing designs because it can run at higher speeds with less vibration.
Where do you oil the bobbin on a sewing machine?
Oiling the race
- Open the hook cover, and remove the bobbin case.
- Rotate the handwheel (about 50 degrees) to move the race of the hook to a position where it can easily be oiled. Handwheel.
- Put a drop of oil onto the hook. …
- After oiling, insert the bobbin case into the hook, and then close the hook cover.
Do Brother sewing machines need oiling?
One thing I LOVE about my Brother Project Runway (the Innov-is 40 model) is that it doesn’t really need servicing too often at all. Brother sewing machines are self-oiling, meaning, each part oils itself as you use it.
What should my sewing machine tension be set at?
The dial settings run from 0 to 9, so 4.5 is generally the ‘default’ position for normal straight-stitch sewing. This should be suitable for most fabrics. If you are doing a zig-zag stitch, or another stitch that has width, then you may find that the bobbin thread is pulled through to the top.
What is the shuttle hook on a sewing machine?
A common sewing machine design uses a floating shuttle hook. The floating hook design allows a top thread loop to pass completely around the bobbin assembly. A lock stitch is formed when the top thread has looped completely around the bottom thread. The take-up lever ensures a tight stitch.
What does a tension dial do on a sewing machine?
The tension discs squeeze the thread as it passes between them, while the tension regulator controls the amount of pressure on the discs. On older machines, there are only two tension discs, controlled by a screw or knob.
Why isn’t my needle catch the bobbin thread?
– Your thread could be caught on something between the needle and your spool of thread if so, your thread will be too tight for the needle to pick up the bobbin thread. … The flat side of the needle should be facing toward the back of the machine. – Make sure that you have threaded the needle eye from the front to back.
Why does my thread bunch up underneath?
Your Thread Tension Is Too Tight
Sewing machine manufacturers suggest that you don’t mess with your bobbin thread tension too much, but you should adjust your upper thread tension if you keep getting bunched up thread underneath your fabric. If your tension is too tight, it can pull your thread and break it.
Does the bobbin thread go through the needle?
The thread enters the tension spring of the bobbin case. Pass the bobbin thread through the slot. Do not cut the thread with the cutter. While lightly holding the upper thread with your left hand, press (Needle position button) twice to lower and then raise the needle.
What is gummy dust?
Gummy – a thick of sticky quality such as oiled accumulated dust on sewing machine part.
What is upper tension?
If one side is pulling too much, the thread from the other side will be visible. If the bobbin thread shows on the top side of the seam and the top thread is straight, the upper tension is too tight. If top thread shows on the underside of the seam and the lower thread is straight, the upper tension is too loose.
What is top loading full rotary hook bobbin?
A “top loading” bobbin/ hook is the same thing as a “horizontal hook“. “Rotary” means that the hook continually spins in one direction. Most of the Janome vertical hooks are oscillating. This means that they rock back and forth during the stitch formation.