Can the external potentiometer of E380/V350/V560 frequency converter only operate up to 25HZ??

E380 Short circuit the JP1 connector at the bottom right corner of the control board to connect pins 2 and 3. Turn the JP3 switch in the lower right corner of the control board to the bottom of the V series frequency converter.

How to test if the frequency converter module is damaged??

Set the digital multimeter to diode mode, connect the red pen to P -, and measure R, S, T, U, V, and W with the black pen.

Use a black pen to connect P+, and a red pen to measure R, S, T, U, V, and W. Is the measured value of the three-phase input and output consistent and between 400-500? Yes indicates normal, while no indicates abnormal.

How to connect genuine and pirated cards to the frequency converter on the engraving machine??

Taking E550 frequency converter as an example:

1. Genuine card: The control card start signal is connected to the X1 and CM terminals, and the speed signal is connected to the AI and GND terminals.

2. Pirated card: Connect the high, medium, and low-speed signals to the X2, X3, X4, and CM terminals, and then short-circuit the CM and X1 terminals.

Is it appropriate to connect the output terminal of the frequency converter to the contactor??

Normally, it is not recommended to connect a contactor to the output terminal of a frequency converter. If a contactor is necessary, the following guidelines should be followed: start by first closing the contactor before starting the frequency converter; Stop the machine, first stop the frequency converter, and then disconnect the contactor. It is definitely not allowed for the frequency converter to suddenly switch on or off the contactor while it is in operation, as this can cause a huge surge current, damage the frequency converter or motor, and in severe cases, may lead to machine explosion.