To check whether the chain or wire rope of a stage electric hoist is installed correctly, you can start from the following aspects: Chain Installation Inspection - **Appearance Inspection**    - **Chain Direction**: Observe whether the chain runs smoothly and naturally between the electric hoist and the sprocket. Check for any signs of twisting, knotting, or obvious bending. The chain should operate normally along the established track and sprocket.    - **Tension**: Manually turn the drive wheel of the electric hoist to check the tightness of the chain. If the chain is too tight, it may increase the motor load, causing the motor to overheat or even be damaged. If it is too loose, problems such as tooth skipping and chain derailment may occur. Generally, when the chain is in a non - working state, it should have an appropriate sag. The sag is usually about 1% - 2% of the chain span.    - **Connection Parts**: Check whether the connecting rings, links, and other parts of the chain are firmly connected. Ensure that the connecting pins are properly installed and there is no looseness, detachment, or deformation. - **Operation Inspection**    - **No - load Operation**: Start the electric hoist for no - load operation and observe whether the chain runs smoothly during the operation. Check for any abnormal vibrations, noises, or jams. If there are such issues, it may indicate improper chain installation or problems with the sprocket.    - **Load Operation**: After the no - load operation is normal, conduct a test lift with a small load to check the chain's operation when bearing a certain weight. The chain should be able to lift and lower the load smoothly without obvious slipping or abnormal noises. Wire Rope Installation Inspection - **Appearance Inspection**    - **Winding Condition**: Check whether the wire rope is wound neatly and tightly on the drum. Look for any signs of messy or overlapping winding. The wire rope should start from one end of the drum and be evenly wound on the drum layer by layer, without mutual extrusion or crossing between layers.    - **End Fixing**: Check whether the end of the wire rope is firmly fixed. When using wire rope clips for fixing, the number, spacing, and installation direction of the clips should meet the requirements. Generally, the distance between wire rope clips is 6 - 7 times the diameter of the wire rope, and the U - shaped bolt should be buckled on the tail section of the wire rope.    - **Wear and Broken Wires**: Carefully observe the surface of the wire rope for any signs of wear, broken wires, or rust. Wire ropes with wear and broken wires exceeding the specified standards should be replaced in a timely manner to avoid safety accidents. - **Performance Inspection**    - **Limit Position Inspection**: Raise and lower the hook of the electric hoist to the limit positions and check the remaining number of wire rope turns on the drum. Generally, when the hook reaches the lower limit position, at least 2 turns of the wire rope should be reserved on the drum as safety turns.    - **Braking Inspection**: Start the electric hoist to lift a certain weight of the load, and then suddenly apply the brake. Observe the braking condition of the wire rope. The wire rope should not show obvious slipping or loosening, and the braking device should be able to hold the load reliably.