Needle selector control and drive circuit

Abstract

A needle selector control and drive circuit, including a main control module, multiple needle selectors, and a drive circuit, characterized in that the drive circuit includes an integrated drive control module, multiple isolated drive primary circuits, and multiple secondary drives; The integrated drive control module includes one or more integrated drive control chips; the integrated drive control chip saves a large number of original logic control chips, simplifies the circuit, and improves reliability.

Description

technical field [0001] The invention relates to the textile field, in particular to a needle selector control and drive circuit in a fully automatic flat knitting machine. Background technique [0002] A needle selector is widely used on machines in the knitting industry (such as large knitting machines, small knitting machines, flat knitting machines, hosiery knitting machines, underwear knitting machines, glove knitting machines, etc.). To realize irregular jacquard. However, 95% of domestic needle selectors are electromagnetic. After years of development, the current electromagnetic needle selectors are made of the principle of instant magnetization. Time energization, the energization time is 0.7-3.2 milliseconds (the energization time is determined by different needle selector models, and it needs to be accurate to 0.01MS), and the current state is maintained by the residual magnetism after the cutter head moves. To the impulse current 0.7-3.2 milliseconds. Therefore...

AI Technical Summary

Problems solved by technology

[0003] At present, the common driving schemes of domestic control systems are as follows: figure 1 , the solution is to directly control the magnetization time of the coil through the MCU. When the number of needle selectors is large (generally more than 100), it will cause a heavy burden on the MCU. Therefore, engineers design programs in order to be able to control More channels sacrifice the time accuracy of magnetization, and most of the magnetization control accuracy cannot reach 0.01MS, resulting in a certain difference between each channel of the needle selector, which directly affects the operating speed of the machine

It is also worth noting that since the second-level drive adopts a paired tube drive scheme, each channel needs dead zone control to ensure that the upper and lower tubes will not be turned on at the same time, but now this solution cannot achieve separate dead zone control for each channel. The next best thing is to design a logic interlock circuit in the first-level drive circuit. However, when the parameters of electronic components are discrete or the environment changes, there is still a chance that the upper and lower tubes will be turned on at the same time, causing the drive board to burn out. Therefore, the damage rate of the current control system driver board is relatively high.

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