In terms of limit protection, the stage hoist controller is precisely linked with the upper and lower limit switches of the hoist. It supports flexible presetting of the safe travel range of the truss lifting according to the personalized requirements of different scenarios such as stage construction height, venue construction space, and exhibition booth layout, which is suitable for hoisting operations from small-stage projects of several meters to large-venue projects of dozens of meters. The limit switches adopt a military-grade anti-misoperation design, with built-in anti-vibration buffer modules and dust-proof sealing structures. They can effectively resist the interference of harsh working conditions such as high-frequency vibration, dust intrusion and humid mist at the construction site, maintaining stable response even in complex operating environments and eliminating potential safety hazards caused by switch mis-triggering or failure.
When the truss rises to the preset maximum limit position or falls to the preset minimum limit position, the limit switch will transmit a trigger signal to the stage hoist controller at a millisecond-level speed. The controller will immediately issue a forced shutdown command and lock the motor drive circuit at the same time to prevent the equipment from continuing to operate due to inertia. This design completely eliminates failures such as irreversible damage to the mechanical structure, steel wire rope entanglement and jamming, guide rail deformation, and pulley derailment caused by the equipment operating beyond the specified range. It comprehensively safeguards the operational safety of various high-altitude hoisting scenarios including stage construction, venue construction, exhibition layout and large-scale performance setting, and significantly reduces equipment maintenance costs and construction accident risks.
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