Industrial production
lines often use pneumatic cylinders to change the direction of movement of
objects, closing the bottle caps to provide more treatment.
Figure shows the operating
principle of a cycle
State Evolution the Grafcet :
v Rule 1: Initial State evolution requires active Steps at the beginning of operation (at least one).
v Rule 2: Transposition of a Transition a Transition is active or enabled only if all the Steps at its input are active (if not it is inactive). A Transition can only be transposed if it is active and is true the associated condition (receptivity function).
v Rule 3: Evolution of active Steps the transposition of a Transition leads to the deactivation of all the Steps on its inputs and the activation of all Steps on its outputs.
v Rule 4: Simultaneous transposition of Transitions All active Transitions are transposed simultaneously. GRAFCET
v Rule 5: Simultaneous activation and deactivation of a Step In this case the activation has priority.
v Rule 1: Initial State evolution requires active Steps at the beginning of operation (at least one).
v Rule 2: Transposition of a Transition a Transition is active or enabled only if all the Steps at its input are active (if not it is inactive). A Transition can only be transposed if it is active and is true the associated condition (receptivity function).
v Rule 3: Evolution of active Steps the transposition of a Transition leads to the deactivation of all the Steps on its inputs and the activation of all Steps on its outputs.
v Rule 4: Simultaneous transposition of Transitions All active Transitions are transposed simultaneously. GRAFCET
v Rule 5: Simultaneous activation and deactivation of a Step In this case the activation has priority.
Description of Operation:
v The evacuation of the objects is done by a cylinder.
v The start of the operating cycle is done by the action of the cycle start button Dcy, and the cylinder A must be in position a1.
v The limit switch action a1 causes the actuator cylinder A to enter.
v The outlet from cylinder B to b1 allows the bottle to be capped.
v The limit switch action b1 causes the actuator cylinder B to enter.
v Finally a new cycle.
v The change in location of the cylinders allows for several applications with two displacements.
v The evacuation of the objects is done by a cylinder.
v The start of the operating cycle is done by the action of the cycle start button Dcy, and the cylinder A must be in position a1.
v The limit switch action a1 causes the actuator cylinder A to enter.
v The outlet from cylinder B to b1 allows the bottle to be capped.
v The limit switch action b1 causes the actuator cylinder B to enter.
v Finally a new cycle.
v The change in location of the cylinders allows for several applications with two displacements.
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