Vertical Rotary Shuttle Hook System
Industrial sewing machines and home models middle and high-end class have a rotary vertical or horizontal hook system. This type of shuttle operation has better performance in comparison with oscillating hook. This type of shuttle runs at high speeds and provides a reliable stitch formation. However, these machines are usually more expensive than oscillating hook machines.
A rotary hook machine is a machine in which the hook rotates in a full circle around. In order to form a stitch it must make two full circles around.
Here you can read how works vertical rotary hook and tips for repair.
Bobbin case is the same as the sewing machines with oscillating shuttle hook.
Let's remove the needle plate and take a look inside this device.
I recommend periodically remove the needle plate and to clean the shuttle mechanism with brush.
Now let's see the work of the vertical rotary shuttle. We will to lower the needle down stepwise.
First the tip of hook must go into the needle loop.
The hook point should pass very close (0.15mm) to the needle. At the same time the hook point should pass above the eye of the needle to 1.5-2.5mm.
The hook begins to turn to the left and to pull the thread down.
The hook begins more and more pulling the thread.
At this point, the thread slips off the surface of the shuttle hook and the sewing machine starts too sharply lift top thread up.
In this position the upper thread pulls the lower thread to form the stitch.
But to form a new stitch the vertical rotary hook must do a new full circle without pulling the thread.
English isn't my first language, so please excuse any mistakes and help correct them.
E-mail for sending is on the contact page.
Related Tutorials and Tips:
How to Choose Your First Sewing Machine
Buying a sewing machine for beginner is an important event. Here are some helpful tips how to choose your first sewing machine.
How to use the coverstitch machine
The coverstitch machine is most used for sewing the clothing made of knit jersey fabrics. Here you find a tutorial how to use the coverstitch machine.
Tips for Sewing with Leather
If you are working with leather and faux leather here you find a few helpful tips for sewing with leather.
Steps to Shirring with Elastic Thread
Shirring technique is often used for decoration of dress's or skirt's waistline. In this tutorial you learn how to sew with elastic thread.
How to Install the Invisible Zipper
Knowing how to sew an invisible zipper is an important skill every sewer should master. Here are steps of installing a zipper with 30 photos and tailor's comments.
How to Thread a Sewing Machine
This is the universal tutorial for threading any sewing machines and winding a bobbin. More than 30 photos with pro comments help you learn how thread your sewing machine.