2. I will give you a reference on the adjustment method of the highest sewing speed. Loosen the presser foot wrench. Loosen the fastening screw of the take-up spring shaft. When the limit plate of the take-up spring is rotated counterclockwise, the swing amplitude increases, and vice versa. Tighten the screw of the take-up spring limit plate.
Types of computerized sewing machines:
1. Electric sewing machines: the motor speed is controlled by changing the voltage. This kind of sewing machine generally uses pedal speed controller.
2. * Sewing machine: The speed is controlled by the circuit, and it can generally be operated by the buttons on the fuselage panel at hand. Some of them can be made with a pedal speed controller like an electric sewing machine.
Compared with electric sewing machine, * sewing machine has the following advantages: the penetration of thick materials is enhanced; When sewing is finished, the stop position (up and down) of the needle can be controlled; It is made of fuselage panel.
3. Computer sewing machine: built-in microcomputer module, preset stitch length and width of various patterns. It can also realize the functions of sewing characters, sewing complex patterns and embroidering.
The following functions can be automatically completed: automatic adjustment of thread tension, automatic keyhole locking, automatic reverse sewing at the beginning and end of sewing, one-button pattern setting, etc.
* Mode of operation
Differences between mechanical and electric sewing machines:
1. Pedal speed controller, which can start, stop or adjust the speed by controlling the pedaling intensity. Electric sewing machines, professional sewing machines and sewing machines adopt this control mode. It is very convenient to use this method when making large-scale works with both hands, or when the speed needs to be adjusted frequently. Although it is very convenient to sit and use, it may be inconvenient if you work on your knees.
2. The operation of the fuselage panel, such as start, stop, speed regulation, reverse sewing, etc., can be performed through the fuselage panel switch at hand. The pedal sewing machine can't adopt this control mode.