some sequences of automation operations so that we can automize operation using pneumatics and electropneumatics.

1. To operate Automation of double cylinders for following sequences –
1. Start A+B+A-B- stop using Pneumatic trainer kit
2. A+B+A-B- Continuous using Pneumatic Trainer kit
3. Start A+B+A-B- Stop solenoid-spring using Electropneumatics.
1.Start A+B+A-B- stop using Pneumatic
 Open FLUIDSIM and make connections as shown in fig.1.
 Two Double acting cylinders A & B are placed and connected with 4/2
pilot-pilot direction control valves.
 Manual start button 3/2 valve is placed and connected to the left of 4/2
valve which was connected to cylinder A. This actuates cylinder A from
A- to A+.
 Another 3/2 roller valve placed at B+ is connected to the right side of 4/2
pilot valve connected to A. This actuates A from A+ to A-.
 3/2 roller placed at A- position is connected to the right side of 4/2 pilot
valve connected to B. This actuates the cylinder B from B+ to B-.
Fig-1

2. 2. A+B+A-B- Continuous using Pneumatic
 Open FLUIDSIM and make connections as shown in fig.2.
 Two Double acting cylinders A & B are placed and connected with 4/2
pilot-pilot direction control valves.
 3/2 Roller valve is placed at position A-,B-,A+&B+.
 The 3/2 roller valve at B- is connected to left of 4/2 valve to actuate A+
position of cylinder A.
 3/2 Roller valve at A+ is then connected to the left side of 4/2 valve to
actuate B+ position of cylinder B.
 The 3/2 roller valve at B+ gets active and is connected to the right side of
the 4/2 valve to actuate cylinder A to position A-. This moves the
cylinder B+ to B- position.
 The above series continues making this a continuous circuit of A+B+A-
B-.
Fig-2

3. 3.Start A+B+A-B- Stop solenoid-spring using
Electropneumatics
 Open FLUIDSIM and make connections as shown in fig.3.
 When the start button is pressed , signal reaches solenoid A+ since
internal relay IR is normally closed.
 A+ gives signal to A+ which activates solenoid B+ since Internal relay IR
is again normally closed.
 Solenoid B+ gives power to B+. B+ and A+ together gives to internal
relay IR.
 IR then gives signal to A- solenoid and cylinder A retracts to A- position.
 Since A+ is latched with IR . IR remains in power. IR and A- together
gives signal to B- and therefore cylinder B retracts to position B-.
Fig-3

4. Application-
Practical application of this circuit – Say, A represents an arm and B represents
wrist, Arm moves ahead, wrist closes, arm comes back and wrist opens. This
can be compared to a robot arm, which has to hold a work-piece(say-hot) from a
conveyor and place it to another conveyor. The worker has button-based
control, to move the arm and place the piece on another conveyor.