servo upside down special machine parking problem treatment ideas, do you know? The spindle of the digital lathe is parallel to the horizontal plane, and the circular table with a large diameter is used to clamp the workpiece. These machines are mainly used to process large complex parts with large radial size and relatively small axial size.

Digital lathe parking problem phenomenon: digital lathe parking will make a big sound, while the workshop power supply trip. First, the shop electrician checks the power supply system to check the location of the traveling air circuit breaker. Because the link mechanism of the active trip in the ambient moisture switch box is corroded, one of the other three phase contacts can only contact a small part. Second, the workshop power transformer capacity is small, overload work. Normal phase voltage is only 340V. Finally, a thyristor on the digital control rack is burned, check the drive circuit, the trigger pulse is shorter, as long as the normal trigger pulse width is one-fourth, it will be confirmed that the amplifier tube of the trigger circuit is not functioning well.

Defect analysis: The result of insufficient phase of thyristor under rectified state is different from that under reverse change. In the case of rectification, the thyristor with high potential is always triggered, and the previous thyristor withstands the reverse voltage and is disconnected. In the shutdown process of thyristor, the reverse phase blocking state is the main one. Even if the latter thyristor is not triggered, the thyristor will actively shield over a certain period of time. However, in the case of stopping and slowing down, that is, in the case of reverse change, the same thyristor with higher triggering potential is conductive, and if the previous thyristor is closed under reverse pressure, it will be in a positive closed state for a long time when the thyristor is closed.

In this way, if the last thyristor is blocked, due to the discharge action and effect of the inductance, the thyristor will recirculate once, and the thyristor will continue to pass under the positive accompaniment. And interfere with the thyristor conduction behind. Therefore, the forward voltage output by the thyristor overlaps with the motor potential, producing a large current, which reverses, burns the fuse, and re-burns the thyristor. The voltage power supply system in the digital lathe shop is normal and may not burn the thyristor if there is no large shaking. Due to the communication network voltage fluctuation, the workshop transformer capacity is small, overload work, the upper shaft group trigger pulse width is small, the workshop power system main switch box damage and other comprehensive reasons, the fault occurred.

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