Presser foot lifting electromagnet closed-loop control device for industrial sewing machine and control method

Abstract

The invention belongs to the technical field of sewing machines, and particularly relates to a presser foot lifting electromagnet closed-loop control device for an industrial sewing machine based on position feedback and a control method. The presser foot lifting electromagnet closed-loop control device comprises a sewing machine controller, a presser foot lifting electromagnet driving module, a presser foot lifting electromagnet device and a presser foot position detection device which are electrically connected in sequence. The sewing machine controller receives a presser foot lifting control instruction input from the external world, and the presser foot position detection device and the sewing machine controller are electrically connected to form a closed-loop structure. The presser foot position detection device detects the position of a presser foot and sends a presser foot position signal to the sewing machine controller. The sewing machine controller sends an instruction to control the presser foot electromagnet driving module to drive an electromagnet of the presser foot lifting electromagnet device to act according to the presser foot position signal so that the presser foot can move. The presser foot lifting electromagnet closed-loop control device can be intelligently controlled, various position detection devices can be adopted, multiple schemes can be selected, and the presser foot lifting electromagnet closed-loop control device is easy to obtain, high in precision, free of artificial participation, easy and convenient to use, simple in structure, easy to install and applicable to various sewing machine types.

Description

Technical field: [0001] The invention belongs to the technical field of sewing machines, in particular to a closed-loop control device and control method of a presser foot lifting electromagnet for industrial sewing machines based on position feedback. Background technique: [0002] At present, with the development of electronic technology, industrial sewing machines are gradually becoming intelligent. Now more and more sewing machines on the market use electromagnets to drive the presser foot to realize automatic presser foot lift. However, because the force of the presser foot lifter electromagnet is not easy to control, the function of automatic presser foot lifter has not been widely recognized. [0003] The general control principle of the existing presser foot lifter electromagnet to drive the presser foot is: first drive the presser foot lifter electromagnet with 100% duty cycle PWM for a period of time (this time can be set by parameters, assuming parameter 1), use ...

AI Technical Summary

Problems solved by technology

[0004] However, 1. After the electromagnet has been used for a period of time, the driving force will decrease due to aging and other reasons; 2. There are differences between different electromagnets for lifting the presser foot; 3. The force of the sewing machine presser foot can be adjusted

Due to the above reasons, it is difficult to set an appropriate value for parameter 1 and parameter 2 to drive the electromagnet for lifting the presser foot. Promotion of a function

Images