High-speed motors are generally used in equipment such as CNC engraving machines, precision grinders and high-speed centrifugal equipment. We will take the CNC engraving machine as an example to introduce in detail the use principle and parameter design of the KE300A frequency inverter on the engraving machine.
The spindle system is an important component of the CNC engraving machine, and its performance has a vital influence on the performance of the entire CNC engraving machine. The spindle motor mostly adopts two-pole high-speed brushless water-cooled motor, which has low noise and high cutting force. The operating speed is generally 0-24000RPM, and the corresponding frequency of frequency converter drive is 0-400HZ. Therefore, the system requires high speed stabilization accuracy, large torque at low speed, short acceleration/deceleration time, and low temperature rise at high speed to meet high production efficiency and processing quality.
1. Basic operation
The default selection is V/P control mode. Use D1 and COM terminals to short circuit to control the start and stop of the spindle motor of the engraving machine. Set the seven-stage speed required for production through the D3~D5 terminals. DI2 terminal is used as fault reset.
According to on-site production requirements, set the parameters P0.17 and P0.18 to 15 seconds (acceleration/deceleration time). Considering the higher running speed of the motor and the stability of use, the frequency inverter needs to be used in a higher gear. The system runs stably under the seven-speed frequency of 50HZ, 100HZ, 200HZ, 250HZ, 300HZ, 350HZ, 400HZ, and the current is small at 400HZ (corresponding to 24000RPM), which can effectively extend the life of the motor.
Seven-stage speed terminal control sequence:
DI3+ DI4+DI5: 400HZ
2. System schematic diagram
Ⅳ. Parameter settings and functions
D5 multi-speed control 3
Multi-speed speed value setting
Other set values default to the factory value and the inverter restores the factory value setting PP.01 to 1