Moving Trains 101

This is the begining of a multi-part series in which I will share my knowledge of theme park rides and attractions. In todays post I will be talking about the devices that are used to detect and move the train.

Beginning from the top of the image down;

1. LIM/LSM/MSD – Used to control the speed of a train entering a segment. Can be setup as static, or dynamic. In a static environment the train can only pass at a specific speed, In a dynamic system the computer calculates speed and direction and applies a braking force accordingly.

2. Fail Safe Squeeze Type Brakes – Used to bring a train to certain speed range, or a complete stop. Unlike the LIM hardware, Unless it is set for a complete stop, trimming speed cannot be set as accuretly with out the assitance of timing squences before the braking system.

3. Drive Wheels – Usually a single phase 120 volt or three phase 220/440 volt encoded motor driven system attached to a set of rubber wheels. These wheels engage the train by gripping the brake fin, It should be noted that drive tires should be heat rated as they have been known to melt on idling trains.

4. Proxy Switch – A sensor linked to the PLC that is activated by the metal in the brake fin. Usually located 30MM to 80MM away from the fin.