A control system and method for a rotary head sewing machine

Abstract

The invention belongs to the field of tight control of industrial sewing, and particularly discloses a control system and a control method for a machine head rotating type industrial sewing machine. The control system comprises an upper computer, a six-axis motion control card, a rotating shaft controller and a driving and executing module, wherein the upper computer comprises an upper computer main control module, a pattern file and parameter storage module and a data processing module; and the six-axis motion control card is in real-time communication with the upper computer by means of a CAN bus to transmit data, and is in switching connection with the rotating shaft controller by means of a shaft control signal of a rotating shaft. The invention also discloses the corresponding method.According to the control system, by the human-computer interaction and the data processing of the upper computer, the trajectory planning and the precision interpolation of the six-axis control card,the switching connection of the rotating shaft controller, concrete implementation of the driving and executing module, and the point location rotation of the rotating shaft, a machine head always faces the tangential direction of a sewing trajectory, and the exquisite trajectory is ensured.

Description

technical field [0001] The invention belongs to the technical field of tight control of industrial sewing, and more specifically relates to a control system and method of a rotary head sewing machine. Background technique [0002] The sewing industry has always been a representative of labor-intensive industries, but in recent years, with the rise of intelligent manufacturing and rising labor costs, the development of automated industrial sewing machines that can greatly liberate manual operations has begun to take shape. Industrial sewing machines refer to sewing machines suitable for sewing workpieces used in mass production in sewing factories or other industrial sectors. They are often specially designed for a specific workpiece or a specific sewing process. The special type is very strong and the production High efficiency and wide application prospects. [0003] Template sewing machines have been researched and produced by hundreds of enterprises in China, but the cha...

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Problems solved by technology

[0003] Template sewing machines have been researched and produced by hundreds of enterprises in China, but the characteristics of the fixed head and only the X-axis and Y-axis drive the fabric sewing make the stitch control accuracy of the sewing machine not high, and the stitches are not exquisite enough, especially for some graphics. The corners and the sewing direction cannot meet the high standard requirements when switching back and forth, and the fixed head cannot adapt to the rapid adjustment of material thickness. Therefore, some people in the sewing industry have begun to study double-spindle, rotatable and liftable machine heads. Industrial sewing machine, but because this type of industrial sewing machine relies on high-end controllers and must use full servo drive and motor limitations, it has become an obstacle to its mass popularization in the market

[0004] In the prior art, due to the characteristics of high precision and high speed of the main shaft, servo motors are basically used as actuators at home and abroad. Due to the long stroke, the Y axis also needs to use servo motors as drive components to achieve precise material feeding. Other axes It can be gradually replaced by a closed-loop stepper motor, but the performance of the stepper driver is obviously lower than that of the servo drive. Therefore, it is urgent to develop a control method to control the stepper motor to realize the servo motor to achieve high-precision control and good sewing quality.

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