The CNC lathe is suitable for engraving mold industry, plastic mold industry, footwear industry, watch industry, optical industry, hardware industry, trademark industry, toy industry, handicraft industry processing, etc., can realize end face, outer circle, grooving, inner Turning of holes, arcs, taper at any angle, etc. The spindle part of the lathe adopts a sinusoidal 303 series inverter. 4. Parameter setting: 5. Debugging result Pvc Coated Iron Wire,Galvanized Iron Wire,Pvc Coated Cage Wire Puersen Hardware Wire Mesh Products Co., Ltd. , http://www.sjz-wiremesh.com
Digital control machine tool (NC, Numerical Control Machine) is a mechatronics product integrating mechanical, electrical, hydraulic, pneumatic, microelectronics and information technology in the past 30 years. With high precision, high efficiency, high automation and high flexibility. The technical level of CNC machine tools and the percentage of metal cutting machine tool production and total possession are one of the important indicators to measure the national economic development and the overall level of industrial manufacturing.
Taifeng CNC Machinery Co., Ltd. is a Sino-Taiwan joint venture professional CNC machinery manufacturing enterprise. Its CNC equipment has been widely used in many fields. Originally, the company's machine tools all use imported frequency converters, and now gradually adopt sinusoidal 303 series inverters.
This paper mainly introduces the application of sinusoidal 303 series inverters on the company's TFDC7060 machine tools, TFDC500 machine tools, TFDC650 and other machine tools: 
SINE303 series inverters easily complete the control of CNC lathe spindle drive.
2. SINE303 series inverter features:
1). Field-oriented current closed-loop vector control, motor variables are completely decoupled.
2). Adopting TI's latest high-performance 32-bit motor control dedicated DSP to complete complex control algorithms at high speed and accurately, the first domestic product application.
3). At 0HZ, the starting torque can reach 150% of rated output, which fully meets the requirements of CNC lathes, ensuring that the machine has strong cutting force at low speed and heavy cutting.
4). Automatic identification of motor parameters, online identification of motor parameters to ensure system stability and accuracy.
5). The speed range of 0~600.00Hz fully meets the high frequency requirements of CNC lathes.
6). Automatically track changes in load and automatically limit the output current so that it does not exceed the maximum allowable current value. Even if the load is abrupt, rapid acceleration and deceleration, the inverter does not cause overcurrent, short circuit and other faults, achieving high performance and high reliability of the inverter configuration. The response is fast and stable at high speed shutdowns.
3. Inverter wiring diagram 
It turns out that the SINE303 series of high-performance vector inverters can fully meet the requirements of machine tool spindle control. The leading magnetic flux algorithm adopted by SINE303 can smoothly output 150% torque even under low speed (low frequency) operation to meet the processing needs of different parts. It can completely replace the traditional rolling bearing spindle structure, and the spindle structure is simple. Compact and can achieve true stepless speed regulation. The speed of this spindle is controlled by the external analog signal to control the output frequency. Different speeds are required in different machining processes (such as roughing, finishing, etc.). At this time, the CNC system can output different analog voltage signals to the inverter. Different speeds are realized, and the start-stop signal is also controlled by the numerical control system, which improves the degree of automation and prolongs the service life of the tool.
6. Conclusion
CNC machine tool spindles generally use AC servo system, imported brand vector control inverter and frequency conversion special motor, and the purchase cost is very high; SINE303 series inverter has its unique performance (small starting current, smooth speed regulation, large speed range, energy saving and environmental protection) , stable operation, high precision, high frequency torque, complete protection function, high reliability, easy operation and maintenance, etc.) and superior cost performance, rapidly rising in the application of CNC machine tools.
Application of sinusoidal frequency converter on CNC machine tool spindle (Fig.)
1. introduction