About the over-voltage alarm of the spindle frequency converter of the winding machine
The main shaft inverter of the automatic winding machine generates an oL over-voltage alarm on the operation panel every time it stops. Use a multimeter to measure the input side power supply voltage and find that it is normal, so the problem is locked in the deceleration time set by the inverter. In order to reduce the inertia of the spindle as much as possible, the deceleration time of the inverter is set to be very small, which causes the frequency of the inverter to drop quickly after the stop signal is sent, and the synchronous speed of the motor also drops quickly. Due to the large inertia of the winding motor, the actual speed of the winding motor exceeds the synchronous speed at this time. The winding motor runs in the generator state, and a large voltage is induced on the stator side of the motor, which causes the inverter to generate overvoltage. Call the police.
The system has been actually debugged and the deceleration time is set to 0.5S, which can greatly reduce the inertia of the automatic winding machine when decelerating, and ensure that no overvoltage alarm occurs. The tension adjustment when winding the flat wire is passed It is achieved by adjusting the air pressure of the disc brake pads, and we should also summarize the corresponding air pressure for different line widths.
The tension of the round thread during winding is adjusted by the number of windings on the relaxation roller. When winding a thinner round thread, if the tension value is adjusted improperly, the thread will be elongated and become thinner. In the case of paint peeling off, automatic winding machine manufacturers should summarize the appropriate number of winding turns for different round wire diameters.
If it is found during debugging that the winding mechanism of the automatic winding machine will obviously go and stop, and in each stop and go cycle, the walking time is very short and the stopping time is very long, resulting in tight wiring Degrees are inconsistent. You can consider reducing the sampling period to twice the PLC scan period and continue debugging. It is found that the cable mechanism can move smoothly, without the phenomenon of one stop and one stop, and the cable is more compact.
