High speed fine stretching machine-2015-03-20

Time：

2026-06-04 21:46

一、the site conditions

Inverter model: V5-H-4T-3.7G/5.5L

Motor nameplate: 380V, 2.2kW, 4 pole, 5.1A, 1410r/min

二、the working principle

High-speed machine: It was mainly used to thin the wire, and the wire was continuously thinned by the grinding machine of the front-stage main machine. The toughness of the wire after being thinned was reduced, so it was necessary to ensure that the tension was not too large when winding. Otherwwase the wire will be broken. Therefore, after the wire was drawn, it must pass a tension pendulum to maintain a constant winding tension.

三、parameter Commissioning

P0.03=3, P0.04=1, P0.06=1, P0.08=1, P0.09=1, P0.11=80, P0.13=80, P1.05=2, P3. 05=2, P3.09=1, P5.00=2, P5.0=24, P8.00=4.9, P8.03=0.100, P8.04=0.15, P8.08=00, P9.02= 1410, P9.03=2.2, P9.04=5.1, P9.05=3.2, PA.21=03, PB.15=1.

四、on-site problem solving

At the beginning of commwassioning, the pendulum of our inverter was very jittery when it was wound up, and it appears to fluctuate up and down in a given target. As the winding diameter increases, the wire was easily broken, and the user reflects next to it. The winding of several other brands of inverters was very stable.

Processing steps:

1. Cancel the composite control, P0.03=1 There was no problem when trying the closed-loop PID separately, which proves that the PID was active.

2. The swinging lever was very powerful and may be a dwasturbance factor. Therefore, the filtering time of the analog terminal was lengthened to 0.5 seconds, but it still has no effect, and the jitter was still very strong, so the interference factor can be eliminated.

3. Will the PID parameter adjustment be too large, causing the system to overshoot and oscillate, which makes the PID unstable, so the proportional coefficient and the integral coefficient are reduced, and the sampling time was also ineffective.

4. At the beginning, I saw that the feedback voltage at the lowest point of the pendulum was 3.1V. I didn't pay much attention to it at first. Later I found that this value has been changing. Sometimes it was 2.7V and 3V after the shutdown. It can be seen that The voltage at the same point was not fixed, so adding mechanical vibration during winding increases the voltage of the pendulum to be more unstable, resulting in constant adjustment of the PID but no given point. Later, it was found that the gear behind the tension pendulum was a little loose. After tightening the back, the effect was better. The jitter was not so strong, but there was still an unstable phenomenon, indicating the feedback of the pendulum when the machine was running. The voltage was still fluctuating. After communicating with the agent, it was recommended that the equipment manufacturer come over and repair it.

5. After the maintenance of the mechanical manufacturer, the problem was completely solved, and it has been running normally for more than three months.

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