Sock Knitting Machine Control System
- The LEEFU sock machine electronic control adopts new technology and transformer-free technology, which can adapt to a wider voltage range and meet the voltage requirements of many countries. It has an integrated design, simple and reliable structure, and easy installation.
- The LEEFU sock machine’s electronic control servo is integrated and connected with the electronic control system in real-time to ensure optimal operation of the equipment and relieve customers from installation worries.
- LEEFU sock machine electronic control has a wealth of expansion modules to choose from: SHENGKE motor module, settling motor module, scissor motor module, KTF module, extended needle selection module, suction control module, etc.
- The electronic control of the LEEFU sock machine has the swing of the heel needle cylinder following the needle pressing and needle picking angles and automatically adjusts to improve operating efficiency.
- LEEFU sock machine electronic control comes standard with 80-way air valve drive control, and the air valve can be expanded according to demand. The standard configuration is a 6-way 16-segment knife-type needle selector control.
Sock Knitting Machine Control System
- Technical Menu
| 1 | Main Menu |
| 2 | Knitting Menu |
| 3 | Test Menu |
| 4 | Pattern File Management |
| 5 | System Setting Menu |
| 6 | Language Setting Menu |
| 7 | Version Information Menu |
| 8 | Alarm Description |
Sock Knitting Machine Program System
Sock Knitting Machine Mechanical
Within the sock knitting machine control system, the loop knitting machine parts are the main components involved in sock knitting. From top to bottom, they are knitting needles, sinkers, intermediate needles, and jacquard pieces. Knitting needles are divided into two types: long needles and short needles. 72 long needles and 72 short needles are inserted into the needle groove of the needle cylinder. 72 long needles are arranged continuously, and 72 short needles are arranged continuously. The main Responsible for hooking the yarn and knitting it into a loop; there are 144 sinkers in total (taking 144 needles as an example), which are inserted into the sinker slot, arranged 1 apart from the needle slot 1, and matched with the sock needle to form a loop; the middle needle is directly connected to the knitting needle contact to assist the knitting needle to move upward or downward; the jacquard piece is located under the middle piece, and the 8 needle heels correspond to the 8 knives of the 8-knife needle selector. The teeth are in the shape of “/” and are used for needle selection for jacquard. The cam provides the track for knitting needles to move, and the air valve controls the entry and exit of the cam (some cams are divided into one-level driving and driving or two-level driving and driving, to target the two types of knitting with long-leg needles and short-foot needles. Needle). The cam is in direct contact with the knitting needle heel and determines its position. This is the layout of the cam on a cotton sock machine.
Overall Design of Sock Knitting Machine Control System Scheme
According to the control system requirements of the cotton sock knitting machine and based on the modular design idea, a layered cotton sock machine control system scheme based on a RAM microcontroller is proposed. This control system mainly realizes the control of the air valve, motor, and needle selector. As the picture shows. The control system is divided into three layers, namely the human-computer interaction layer, the control unit layer, and the execution layer. The main control unit is the core of the system, transmitting data upwards to the human-computer interaction module, and receiving and processing data from the actuator board downwards. The main control module integrates dual-port RAM, pattern memory, encoder interface, servo motor interface, and CAN communication interface. The function of the dual-port RAM is that when the human-computer interaction module has pattern data delivered, it reads the pattern data and stores it, waiting for the main control function to parse it. The external encoder sends pulses (about 6000 pulses in one circle), and the main control encoder acquisition port captures the changes in pulse number. Therefore, each needle of the syringe corresponds to several pulses. The current needle position is determined by capturing the pulses. The main control function Extract pattern data and action information. The execution layer of the drive module includes three parts: an air valve, motor, and needle selector. The air valve controls the yarn feeder and triangle, etc.; the 5-way stepper motor such as; the 8-way needle selector is respectively a 1-way main yarn needle selector, 1-way elastic needle selector, and 6-way color yarn needle selector. The main control unit communicates with the actuator drive board in the form of a CAN bus, which is conducive to the unified design of the drive board. The needle selector has high requirements for signal reception stability, so it uses a separate CAN2 bus, and the air valve and motor share the CAN1 bus.
Main Control Circut of Sock Knitting Machine
The main sock system controller of the sock knitting machine respectively completes the system pattern data storage, analysis, and real-time transmission, the detection and real-time processing of system signals (system signals mainly include system start and stop, various alarms, etc.), the control of the main servo and Huff plate motor, and the 2-channel CAN Data communication between bus and driver circuit board.
Drive System of Sock Knitting Machine
The drive system of the sock knitting machine includes the needle selector board, valve board, and motor board.
The rotation of the needle cylinder is driven by a disc motor (main motor). The drive of the disc motor mainly consists of three parts: an external encoder, an external driver, and a corresponding drive circuit.
The stepper motor uses a DRV driver chip, and the chip functions include determining the stepping mode.
The 8-knife needle selector drive output method is based on the principle of CMOS inverter. For example, the elastic needle selector is always in working condition when the sock is being knitted. The needle selector is lowered corresponding to the knife head, thereby pushing up the corresponding knitting needle, and then hooking up the elastic to complete the knitting.
The air valve is a single electric control solenoid valve. The airflow through the valve causes the yarn feeder, triangle, and other devices to move to the designated position.
Design of Sock Pattern File Transfer Program
Within the control system of the sock knitting machine, the execution instructions of the executor are parsed and issued by the main control, and its initial prototype is a pattern file. The pattern file mainly includes the file name, machine parameters, speed command, cycle command, motor yarn feeder and air valve action command, alarm function, zero return command, needle selection command, etc.