In the original machine tool, the inverter and the machine tool control system should communicate in real time and transmit the operation information. Solving the communication between the new inverter and the original system becomes the key to the successful transformation. By analyzing the circuit composition, signal direction, interface relationship of the original system, designing new circuits to meet the system control logic. Especially in the new circuit, the external control terminal 2P19 of the MF-9 is connected to the cooling water control logic. When the cooling water is not turned on, the inverter cannot be operated to prevent the grinding head from running without cooling. Burning, to achieve the purpose of protecting the grinding head. After the equipment is installed, according to the electrical parameters of the electric spindle, set the parameters such as the rated frequency and rated voltage of the inverter, and set the output frequency, acceleration and deceleration time, compensation, etc. according to the process requirements. Parameters These parameters must meet the equipment requirements, otherwise, the light processing quality is not qualified, and the grinding head is severely burned. After the above transformation, the grinding head works well and can fully meet the process requirements. Therefore, several ACOM inverters have been retrofitted.
In the use of these MF9 inverters, one inverter has a fault with a rated frequency of only 300 Hz. After inspection, the external line is normal, and the fault should be set in the storage circuit. In order to emergency production and save maintenance costs, try Use frequency coding to set the output frequency of the inverter, short circuit 2P9, 2P8, 2P6, 2P5 of the internal terminal, set the output frequency to 1500Hz. Actually run the inverter, can be used, check the working frequency is exactly 1500Hz. Through the transformation design of the machine tool line, the machine tool runs well after being put into use, and because of the large-capacity frequency converter, the non-faulty trip that often occurs before the transformation is eliminated, and the working stability of the machine tool is improved. He has accumulated some experience in the research work on the localization of imported equipment spare parts. At present, 6 inverters have been modified, each inverter has reduced investment of 190,000 yuan and saved maintenance funds of more than 1.1 million yuan. This technology is in the same industry or high-precision manufacturing industry. It has a wide range of applications and promotion values, with significant economic benefits and good social benefits.
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