Foil winding machine-2015-03-20

Figure 1 foil machine system diagram

1. system diagram:

二、the system conswasts of:

Unwinding motor 1 7.5kW closed loop vector with PG card, V6−T−4T7.5−T0 for inverter

Unwinding motor 2 7.5kW closed loop vector with PG card, V6−T−4T7.5−T0 for inverter

Winding motor 22kW V/F control, inverter V5−H−4T22G/30L

Welding motor 0.75kW V/F control V5−H−4T0.75G/1.5L for inverter

Reducer: The two reduction ratios of the unwinding are 4:3

三、the system requirements:

The winding motor was used for the open loop speed control. Since the coil diameter does not change much, the constant line speed problem was not considered, and the frequency was given by the external potentiometer; however, its operation and stop are realized by the foot switch, that was, controlled by the external terminal. To realize the operation of the frequency drive, it was required to have positive and negative control, which was mainly to rotate on the reel. If the winding fails, it needs to be reversed and re-wound. The working mode was that the operation was started by the foot switch, after a dozen or so laps, the machine was required to stop, and the process was processed. After the process was finwashed, the new shaft was wound.

The unwinder works normally in the torque mode, providing reverse torque for tensioning the material and maintaining sufficient torque; it was required to provide static tension and running tension, and the two tension requirements can be set separately, normal running tension There was an analog setting through the potentiometer. When the system was unwinded, it must also provide enough torque. At this time, the frequency conversion works in the winding mode of the torque open loop, and the material was required to be loose. For the feeding and returning work, the frequency conversion was required to work in the speed mode, the speed was fixed, the running speed was relatively small, and at the same time, in order to cooperate with the clamping device, the torque limitation was required.

The winding inverter and the unwinding inverter are required to provide single-action and linkage control, and each single-action control was required to operate in speed mode.

It was best to unwind the inverter in open-loop torque mode without adding an encoder.

It was required to reduce energy consumption, preferably using DC bus control.

四、the inverter wiring diagram:

Winding frequency drive:

Unwinding the inverter:

systems Manual:

The system requires the inverter to adopt the single-action/linkage state, and also needs to adopt the normal winding state and the fading state when linkage, so the system adopts PLC control, which can simplify the external circuit, reduce the fault point, and facilitate maintenance and change. Working status. All of these working state transitions are input to the PLC through the transfer switch, through the PLC program, output the corresponding working state, and control the corresponding inverter work.

Winding frequency drive, because it only requires open loop speed control, the system speed has external analog quantity adjustment, and the working state has PLC control, so its control mode was relatively simple, and it needs to be equipped with braking unit for emergency stop and other functions. The inverter has built-in braking resistances, etc.

The unwinding frequency drive was required to achieve constant tension control. The torque control method was adopted according to the customer's needs, but the system requires running in the closed loop vector mode, so it needs to be equipped with an encoder, a PG card, etc., and it was always used according to its working state. The dynamic state (ie, the power generation state) was therefore required to be equipped with a braking resistance, and the brake unit was built-in. Its torque control function was realized by a frequency drive.

五、the Commissioning process:

◆ Motor self-tuning: complete tuning of the motor by recording the motor nameplate parameters;

◆ Inverter trial run: mainly to determine the direction of the motor, whether the operation was normal;

◆ PG card parameter setting: used for the adjustment of the closed-loop vector. At the beginning, due to the wiring problem of the PG card, the normal closed-loop vector operation cannot be performed. The performance state was that the no-load running current was about 27A, and the motor speed was oscillating and has been changed. PG card wiring, now running normally;

◆ Parameter adjustment: Mainly set its operating parameters and corresponding function parameters to make it run normally;

◆ Feeding test machine.