A control system of presser foot lifter electromagnet driven by multi-mode output

Abstract

The invention discloses a multi-mode output driven type presser foot lifting electromagnet control system. The system comprises a driving circuit, a control circuit and a work circuit, wherein the driving circuit comprises a power unit, a first diode and a capacitor unit; the control circuit comprises a micro processor and a resistor unit; the work circuit comprises a switch unit, an electromagnetand a second diode; the micro processor controls the power unit to output linear adjustable direct-current voltage, and the voltage can be adjusted to 0 V; the micro processor controls the switch unit to be switched on or off. By means of the multi-mode output driven type presser foot lifting electromagnet control system, the problem is solved that when continuously working, the electromagnet istoo hot and damaged, and the problems are solved that in the process that the lifting state of a presser foot is changed into a lowering state of the presser foot, the mechanical shock between the presser foot and the contact surface is large, so that the device is short in service life and a fabric is damaged, and it is achieved that the electromagnet is quickly started.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a multi-mode output driven presser foot lifting electromagnet control system. Background technique [0002] At present, many industrial sewing machines adopt an automatic presser foot lifting mechanism to reduce the labor intensity of operators and improve labor efficiency. Existing automatic presser foot lifting mechanism is generally driven by electromagnet. [0003] In the existing presser foot lifting electromagnet drive circuit, a constant voltage power supply is usually used. The electromagnet is driven by high voltage in the working state and conducts a large current for a long time. If the current is too high, it will cause the electromagnet to overheat, easily damage itself, and even cause personal danger. [0004] In the existing presser foot lifting electromagnet drive circuit, when the presser foot is switched from lifting to lowering, the electromagnet directly r...

AI Technical Summary

Problems solved by technology

[0003] In the existing presser foot lifting electromagnet drive circuit, a constant voltage power supply is usually used. The electromagnet is driven by high voltage in the working state and conducts a large current for a long time. current, it will cause the electromagnet to overheat, easily damage itself, and even cause personal danger

[0004] In the existing presser foot lifting electromagnet drive circuit, when the presser foot is switched from lifting to lowering, the electromagnet directly releases the connecting piece connected to the presser foot assembly, and the presser foot in the presser foot assembly moves down quickly under the action of the transmission structure , and produce mechanical impact with the contact surface, it is easy to damage the mechanical structure of the presser foot, resulting in the problem of short service life of the presser foot

At the same time, during the working process of the sewing machine, the mechanical impact between the presser foot and the fabric will leave traces on the fabric, affecting product quality

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