Application of KE300A on CNC Machine Tools
micnodrive1
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micnodrive1
Ongoing, First published Dec 14, 2021
converterfrequency
1. The description of CNC machine tools

The main motion of a CNC machine tool is the main shaft driving the rotation of the workpiece through the chuck or top, and the motor driving the gear box to drive and adjust the speed. In the machining process, it is necessary to often have different operating speed requirements for the rotation of the main shaft. The operator controls the opening and closing of the clutch through the multiple positions of the handle combination to obtain multiple combinations of gears, thereby obtaining multiple speeds. The operation is inconvenient and the amount of maintenance is relatively large. Practice has proved that the electromagnetic clutch used for speed control has a high damage rate. This characteristic of the main shaft drive of the original machine tool can no longer meet the needs of the rapid economic development for CNC machine tools. At present, it is more and more common and practical for CNC machine tools to be equipped with frequency converters to control the speed of the main shaft.

2. The introduction of the electrical system

The entire electrical system is composed of CNC machine tools, frequency converters, time relays, and brake components. The wiring diagram is shown below:

(1) The AC power supply is connected to the power terminals (R, S, T) of the main circuit through a circuit breaker. The output terminals of frequency converters (U, V, W) are connected to the main shaft motor in the correct phase sequence. When the running command is inconsistent with the rotation direction of the motor, you can change the two-phase wiring in the three phases of U, V, W arbitrarily, or change the control circuit terminal FWD/REV.

https://www.micnodrive.com/products/variable-speed-drive/
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