Overview
A CNC (Computer Numerical Control) machine tool is a mechatronics product that integrates with mechanical, electrical, hydraulic, pneumatic, micro-electronic and information technologies. It’s a kind of highly flexible, universal, precise and efficient automated production equipment. A CNC machine tool converts the operations and processes required for processing as well as the overall dimensions into numerical codes and inputs them to a CNC device through the control media. The CNC device will then carry out processing and computation on the input data and command the machine tool system and the drive elements to manufacture the required workpiece automatically. The introduction herein is mainly for the unique performance, premium cost-efficiency and satisfactory applications of Canworld CDE500 vector VFDs in CNC machine tools.
Introduction of Canworld CDE500 VFDs in CNC machine tools
The Canworld CDE500 series VFDs employ the advanced speedless vector control technology. The motor provides great torque under a low speed and reaches 150% of torque output in case of running frequency of 0.5 Hz. The VFDs of this series are of high speed precision and provide complete functions, and are able to automatically detect the parameters of dynamic operation of the motor and make corresponding adjustments, ensuring that the motor is running at its highest efficiency. Therefore, the speedless vector VFDs are the best choice of the machine tool industry for replacing AC servo systems. Due to the high cost-efficiency, VFDs are commonly used in machine tools.
![Canworld CDE500 VFDs in CNC machine tools]( "Canworld CDE500 VFDs in CNC machine tools")
A picture of a Canworld CDE500 VFD
1) Employs speedless vector control to meet the requirement of the spindle of machine beds on low-speed torque. The starting torque can reach above 150% at frequency of 0.5 Hz;
2) 0 - 12 kHz in carrier frequency, ensuring a highly silent running of motors;
3) Wide range of speed regulation for various process requirements (0.00 Hz - 300 Hz);
4) Provided with standard 0 - 10 V or -10V - +10 V analog interfaces, which are highly universal and compatible with the interfaces of most CNC systems;
5) Control system diagram of CNC machine tools
![Canworld CDE500 VFDs in CNC machine tools]( "Canworld CDE500 VFDs in CNC machine tools")
6) Electrical schematic diagram of CNC machine tools
![Canworld CDE500 VFDs in CNC machine tools]( "Canworld CDE500 VFDs in CNC machine tools")
The AI1/GND terminals of a VFD provide a CNC system with the analog quantity of speed, in which AI1 and GND are respectively connected with the positive and negative signals of the analog interface in the CNC system. The running parameters of a VFD are as follows:
![Canworld CDE500 VFDs in CNC machine tools]( "Canworld CDE500 VFDs in CNC machine tools")
Advantages of Canworld CDE500 VFDs in CNC machine tools
The Canworld CDE500 VFDs completely fulfill the requirements of spindle control by a machine bed, output torque steadily under low-revs running, satisfy the processing needs of different parts and are simple and compact and can realize the true continuous speed regulation. The output frequency of the spindle revs is controlled through the external analog signals. In case that various processes (e.g. rough and finish machining) require different revs, the CNC system can output different analog voltage signals to the VFD to realize varying revs. Meanwhile, the start/stop signals are also under the control of the CNC system, which increases the automation level and prolong the service life of tools, changing the situation of imported-product dependency, significantly decreasing the operation cost of an enterprise and bringing it good economic benefit.