Study On Subdividing Drive Of Step Motor

The Metallographic Sample Cutting Machine is mainly used to inspect the quality of production and research material science , the step motor , which status influences the quality of the Metallographic Sample , is the key component to make the moving mechanism run .This topic is advanced for the problem of the step motor of the Metallographic Sample Cutting Machine . the step motor take the grinding wheel forward or backward by the screw . Although reducer can avoid step sense and oscillation partly , the strap transmission will influence orientation precision (it is key norm to the small Metallographic Sample Cutting Machine), so plan to use step motor to drive the screw directly ,the step motor at low velocity , which is not drived by the subdividing drive system , will have obvious oscillation and noise that would influence the cutting function ,the usage life and sample structure . Otherwise , the old drive circuit does not quantify and display the cutting velocity, so the interface between person and machine was restricted during the cutting. To settle the above problems ,the research introduce a suite of subdividing driver to control step motor , the aim is to improve step motor running capability and quantify cutting velocity .This paper projects a utility subdividing drive system of step motor, which consists of digital control module, drive module and power module, it uses AT89C52 single chip processor as the core, it realizes the external event orgenerates control signal by I/O interface, timer and external interruption, the system introduce PLD device and ISP technology to the design of phase sequencer, it simplified circuit and improved the anti-disturbing capability by using ABEL-HDL language, this system can realizes data memory, velocity digital control and LED display, etc.This paper adopted firstly the single-chip technique to design control system , which replaced old complicated logic control circuit and simplified test process . In order to assuring the single-chip running unfailingly .improving the ability of the anti-interference technique is the key , because the single-chip system is liable to electromagnetism interference . This paper adopted technique of different subdividing timing to make step motor running steadily , because step motor lose step when it is running at high speed .Experiments indicated that it is convenient to operate and high in the ratio of performance to price, so it has highly utility.