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1. Introduction

Computer embroidery machine is the most advanced embroidery machinery, which enables traditional hand embroidery to the high speed, high efficiency, but also to achieve the hand-embroidered " multi-level, multi-purpose, unity and perfection " requirement, which is a reflection of a variety of high-tech electromechanical products.

China's domestic computerized embroidery machines are mainly high-end models. Compared with international brands, there is still a certain gap, mainly in process technology and materials, which are manifested in differences in service life, thread breakage rate, and sewing accuracy. However, due to the relatively high price-performance ratio of domestic computer embroidery machines, the rapid development in recent years has occupied most of the market share, mainly exported to India, Pakistan, Brazil, Egypt, and other developing countries, of which India is the main. The export direction accounts for more than 80% of the total export volume.

Advantages of computer embroidery machine:

1. Computerized embroidery machine with LCD function

2. Various patterns can be stored

3. With the function of rotating and zooming

4. The patterns can be edited and combined

5. Repeated embroidery

2. Technique Requirements

Key points for debugging:

Through cooperation with the embroidery machine control system, the electrical control system sends control pulse signals to control the speed of the servo motor, and achieve the requirements of precise positioning. The servo motor is connected to the main shaft of the embroidery machine and the frameshifting device through the belt pulley, and then driven by the mechanical shaft to drive the embroidery needle of the embroidery head to reciprocate the up and down embroidery motion, and the frameshifting motor drives the frame to move the frame according to the pattern shape, thereby embroidering Style pattern. In addition to the spindle and frame drive systems required for ordinary flat embroidery, there are also servo control systems for towel embroidery and taping embroidery, such as the D and H axes of towel embroidery. The D axis is used to adjust the direction of the needle tip to ensure the needle tip The gap used to hook the thread is in the direction of the needle movement (moving relative to the cloth frame), and the needle is adjusted every time it moves up and down. The H axis is used for color changing and threading. A positioning pin is used to automatically switch between color changing and threading. When the thread is threaded, the axis ensures that the thread feeding direction is perpendicular to the direction of the gap on the needle tip to facilitate thread hooking. The needle moves every time it moves up and down. once. The M-axis of the tape embroidery is mainly used to feed the tape and adjust the direction of the tape, which directly affects the quality of the embroidery pattern. The positioning accuracy requirements are high and the response is fast.

3. System Constructions

The electrical system of the embroidery machine is mainly composed of a computer controller and a drive controller. The drive controller is divided into a spindle drive and a frame drive.

Frame shifting system: two sets of X-direction and Y-direction motors respectively drive the horizontal and vertical movement of the horizontal plane of the cloth frame and embroider various patterns up and down with the needle. The commonly used drive systems are mainly stepping drive systems and servo drive systems; The driving system has a low speed and the positioning accuracy is worse than that of the servo. The action sound is louder, so the stepping frame moving system has been gradually replaced by the servo frame moving system.

Spindle system: The spindle drives the needle and rotary thread take-up lever. Commonly used drive systems include a slip motor system, frequency conversion system, and servo system. However, due to the poor positioning ability of the first two, the overload capacity is also poor. It is also relatively high, so most embroidery machine systems currently on the market have selected a servo system as the spindle drive system.

Spindle wiring

Zhishan g3220 with 130ST-10025

Moving frame wiring

Zhishan KAD20AA with 2 units 110ST-D06030

4. Application debugging of Zhishan servo

Spindle servo: G2 series 3220

P0-01 = 195 Motor code

P1-04 = 160 command pulse filter

P1-06 = 0010 Inverted input level

P1-08 = d4F0 input port definition

P1-11 = 0001 Motor rotation direction

P2-04 = 22 numerator of electronic gear ratio

P2-00 = 60 position loop gain

P3-01 = 120 speed loop gain

P3-02 = 3 speed loop integral

Frame shift servo: KAD20AA

1. Fast servo response, accurate positioning and stable operation

2. The processed patterns are full and three-dimensional, with good gloss