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. The control circuit of this system is shown in Figure 8. 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...

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Automatic Forward and Reverse Motion of Overhead Crane Driven by a Motor

Notice that when contact (1-2) of limit switch X opens to de-energized contactor F, its contact (1-3) will almost simultaneously closed to energized the contactor R. This will bring about the automatic reversal of the overhead crane from the left to the right.  On the other hand where contact (1-2) of limit switch Y opens to de-energized contactor R, its contact (1-3) will almost simultaneously closed to energize the contactor F. This...

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Limiting the Forward and Reverse Motion of an overhead crane driven by a motor

The motion of an overhead crane moving forward and reverse can be automatically stop at both end by placing a limit switches X and Y in the control circuit of the Forward – Reverse Motor Control shown in Figure below (d). Refer to Figure below (d). When contractor F is energized, the motor runs clockwise. The motor drives the overhead crane to move the right (forward) direction as shown in Forward Reverse Motor Control . Before the crane could...

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Forward Reverse Motor Control

The forward reverse motor control is used i a system where forward and backward or upward and downward movement in the operation are needed. An example of which are shown in figures below (a) and (b). Figure below (a) shows forward and backward lateral movement of an overhead crane driven by motor M. Figure below (b) shows a downward and upward movement of a load is driven by motor lifter M. (a) Lateral...

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WYE-DELTA REDUCE VOLTAGE STARTER

Normal 0 false false false EN-GB X-NONE X-NONE ...

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TWO STATION MOTOR CONTROL

Normal 0 false false false EN-GB X-NONE X-NONE MicrosoftInternetExplorer4 Most often a motor is controlled from two locations as shown in figure below. The stations are station 1 and station 2. The motor M can be started and stopped from the push buttons located in the circuits of the “Two Station Motor...

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