“Design and manufacture a wireless transceiver that performs mixed transmission of digital-analog signals on the same channel. Among them, the digital signal is composed of a set of 4 numbers from 0 to 9; the analog signal is a voice signal with a frequency range of 100 Hz to 5 kHz. Using wireless transmission, the carrier frequency range is 20~30MHz, the channel bandwidth is not more than 2...
There are three power-on conditions for the precision CNC machining center: (1) The power-on button is closed. (2) The power OFF button is closed. (3) The external alarm contact is open. But if one of them cannot be done, it will not light up, then what should we do if the power is not turned on? The following are introduced as follows:
There are two lights on the power supply of the precision CNC machining center unit, one is the power indicator light, which is green; the other is the power warning light, which is red. The power supply unit mentioned here includes the power input unit and the power control part.
When the power of CNC machining center cannot be turned on, if the power indicator (green) does not light up.
The fuses F1 and F2 of the power supply unit have been blown. This is caused by high input voltage, or the components of the power supply unit itself have been damaged.
The input voltage of precision CNC machining center is low. Please check the voltage entering the power supply unit, the allowable value of the voltage is AC 200V+10%, 50HZ±1HZ
Defective power supply unit, internal damage
The power indicator light is on and the alarm light disappears, but the power cannot be turned on.
At this time, it is because the conditions for power-on (ON) are not met. By the following switch Circuit, the conditions for power on are as follows:
The alarm light of the power supply unit of the CNC machining center is on
(1) Fuse of 24V output voltage
①. The 9″ Display screen uses +24V voltage, see the figure below, check whether +24V is short-circuited with ground.
② The Display/manual data input board is defective.