Delayed Automatic Forward Reverse Motion of Overhead Crane Driven by a Motor
This is another situation that requires the overhead crane to rest for a while upon reaching both of the rail. After a pre-determine time the overhead crane will re-start in the opposite direction. Control circuit of "Delay Automatic Forward Reverse Motor of an Overhead Crane" The control circuit of this system is shown Above. Two times TR1 and TR2 are connected to the limit switches Y and X respectively at terminal 3. The terminal no. 1 of the instantaneous contacts TR1(1-3) and TR2(1-3) are connected to the terminals no. 3 of the limit switch Y and X respectively. The delay contact TR1(6-8) and TR2(6-8) are connected to the contacts R(13-14) and F(13-14) respectively. Supposing the overhead crane is moving in the forward (right) direction that means, contactor F(A-B) is at energized and contactor R(A-b) is at de-energize condition. When the overhead crane reaches the right end limit and touches the limit switch Y, the contact Y(1-2) of limit switch Y will open to de-energ...