After browsing youtube for hours looking for a decent explanation of how to make groups out of sequences [(A+B+)(B-C+)(C+A-)], yours is the best explanation so far. Thank you.
Hi @A.j Vorster. Thanks so much for your positive feedback! Regarding your question - you are 100% right, I could have used 4/2 valves instead. That would have been a simpler solution, but I used the 5/2 valves since those are the valves available for use at my university.
I've uploaded a scanned PDF of the pneumatic circuit on the following link. Some other example circuits have also been uploaded to the link: drive.google.com/file/d/0B4_mcwBg9jdyeWJzVUY0SG1DOUU/view?usp=sharing&resourcekey=0-3JFPMRymmvnbA7U6LjJYHA
Hi Chris i cant seem to open the link properly it only opens two drawings then stops is it possible if you can mail them to me please to willem@afrigran.co.za thank you for a great tutorial i am learning this now in a mechatronics course im doing
Hello sir...will u help to get circuit diagram for this application Hydraulic operated hacksaw machine for forward and reverse motion of blade hanger with adjustable feed motion
hi Chris! I have a problem with one circuit : A+ B+ B- B+ B- TAU4 B+ B- B+ B- TAU16 C+ C- A- . I have no idea ho to do the repetition of the "cycle" B+ B- B+ B-. Could you help me please? thank you very much
Hi Michael. A Directional Control Valve (or DCV) is a valve used to extend and retract a cylinder. A Group Selector Valve (GSV) is a valve used to switch between 2 control lines, thereby switching between 2 "groups" of actions. A valve is simply a pneumatic device which is able to control the direction of air flow from some input (usually mechanical (see limit switches in video), pneumatic (see GSVs and DCVs in video), or electrical (modern limit switches use this)).
Hi Kadal. The principles covered in this video can be used in any automated system which contains a repeating sequence. A simple example: Imagine boxes are moving along a conveyor in pairs of 2. You want to push every 1st box off the conveyor to the left, and 2nd box off the conveyor to the right. You can use 2 cylinders for this (we'll call them A and B). So A will push the 1st box (A+) and then retract (A-), B will push the 2nd box (B+) and then retract (B-), and the cycle will repeat each time a new pair of boxes arrive. For a more advanced example, take a look at the machine in this video: ruclips.net/video/24mLxkp-V4Y/видео.html. This machine creates and fills packages of food. Do you see how some of the parts of the machines move up and down to perform a task which is part of a sequence? This sequence can be driven using a pneumatic cascade circuit. In reality, most industrial machines nowadays use programmed PLC's to control the sequence. But it is usually more feasible to control less complex sequences using a pneumatic cascade circuit.
Hi Ava Neo. The input for the DCVs came from the manifold. The manifold's air supply was represented by the black dot (also sometimes represented by an upward pointing triangle). The manifold is simply a device which takes an air supply and distributes it to multiple channels (which - in this case - go to the DCVs).
Hi Jenneilyn! Thanks for your question. Firstly note that your sequence can be simplified to the following: [(A- B+) (A+ B-) (A- C+) (A+ C-)]. This simplified sequence will be much easier to evaluate. Note that there will therefore be 4 Control Lines (because there are 4 repeating groups). You basically follow the same steps outlined in my video - except there is one issue with your sequence: A appears in all 4 groups! But no matter! All you have to do is connect the "left" of DCV_A to **both** CL_2 **and** CL_4 (because groups 2 and 4 have A+), and connect the "right" of DCV_A to CL_1 and CL_3 (because groups 1 and 3 have A-). Then it should follow the sequence perfectly. Only issue is the A+ right at the beginning of your sequence... My simplified sequence does not accommodate for that first A+; A will already be extended from the get-go in my sequence. Usually we work with repeating sequences, so I'm not sure how to handle that first A+, besides how I've explained it above. Let me know if it helps!
After browsing youtube for hours looking for a decent explanation of how to make groups out of sequences [(A+B+)(B-C+)(C+A-)], yours is the best explanation so far. Thank you.
I've got a question though, why do you use 5/2 valves instead of 4/2 valves- which would serve the same purpose?
Hi @A.j Vorster. Thanks so much for your positive feedback! Regarding your question - you are 100% right, I could have used 4/2 valves instead. That would have been a simpler solution, but I used the 5/2 valves since those are the valves available for use at my university.
Me 2😊
Good job. Very clear explantion and clearly spoken
U explain very well. So much thnkzz sir. Keep it up 😀❤️❤️❤️
I've uploaded a scanned PDF of the pneumatic circuit on the following link. Some other example circuits have also been uploaded to the link:
drive.google.com/file/d/0B4_mcwBg9jdyeWJzVUY0SG1DOUU/view?usp=sharing&resourcekey=0-3JFPMRymmvnbA7U6LjJYHA
Hi Chris i cant seem to open the link properly it only opens two drawings then stops is it possible if you can mail them to me please to willem@afrigran.co.za thank you for a great tutorial i am learning this now in a mechatronics course im doing
Hello sir...will u help to get circuit diagram for this application
Hydraulic operated hacksaw machine for forward and reverse motion of blade hanger with adjustable feed motion
@@willemuitslag4015 @Amit Jain: Sorry for the massive delay! Somehow I missed your messages. I have now finally updated the link.
Can you help with the following question please? A+ B+ 5 second delay B- C- C+ A-
3/2 DCV ...actuating valve symbol ,,,,how we can explain shifting of position ...is symbol is correct....
hi Chris! I have a problem with one circuit : A+ B+ B- B+ B- TAU4 B+ B- B+ B- TAU16 C+ C- A- . I have no idea ho to do the repetition of the "cycle" B+ B- B+ B-. Could you help me please? thank you very much
a question from newbie
the part of B0 will activate C1
initially the cylinder B is at B0 so will the cylinder C be at C1 already. the overlapping
ty
Sir i need hydraulic circuit for A+B+A-B-C+C- can u please help me
bro can you draw me the sequence (A+B+B-A-C+B+B-C-)
Hello, can you please explain to me what is the function of a 'group selector directional control valve'
Hi Michael. A Directional Control Valve (or DCV) is a valve used to extend and retract a cylinder. A Group Selector Valve (GSV) is a valve used to switch between 2 control lines, thereby switching between 2 "groups" of actions. A valve is simply a pneumatic device which is able to control the direction of air flow from some input (usually mechanical (see limit switches in video), pneumatic (see GSVs and DCVs in video), or electrical (modern limit switches use this)).
nice explanation Chris
Hi Sir, i need help with pneumatic circuit diagram for A+ B+ / B- C+ D+ A- / D- C-
Using 3 x directional valves ,all of which are 3/2
Thank you
let me know if you got the answer pls
Where do we find its application
Hi Kadal. The principles covered in this video can be used in any automated system which contains a repeating sequence. A simple example: Imagine boxes are moving along a conveyor in pairs of 2. You want to push every 1st box off the conveyor to the left, and 2nd box off the conveyor to the right. You can use 2 cylinders for this (we'll call them A and B). So A will push the 1st box (A+) and then retract (A-), B will push the 2nd box (B+) and then retract (B-), and the cycle will repeat each time a new pair of boxes arrive.
For a more advanced example, take a look at the machine in this video: ruclips.net/video/24mLxkp-V4Y/видео.html. This machine creates and fills packages of food. Do you see how some of the parts of the machines move up and down to perform a task which is part of a sequence? This sequence can be driven using a pneumatic cascade circuit.
In reality, most industrial machines nowadays use programmed PLC's to control the sequence. But it is usually more feasible to control less complex sequences using a pneumatic cascade circuit.
In your DCV's where the input came from? please help me i'm a newbie..TYA :)
Hi Ava Neo. The input for the DCVs came from the manifold. The manifold's air supply was represented by the black dot (also sometimes represented by an upward pointing triangle). The manifold is simply a device which takes an air supply and distributes it to multiple channels (which - in this case - go to the DCVs).
thank you! it's now working
Thank you very much sir
hi chris how bout this [A+ (A- B+) (A+ B-) (A- C+) (A+ C-) (A- B+) (A+ B-) (A- C+) (A+ C-) ]
Hi Jenneilyn! Thanks for your question. Firstly note that your sequence can be simplified to the following: [(A- B+) (A+ B-) (A- C+) (A+ C-)]. This simplified sequence will be much easier to evaluate. Note that there will therefore be 4 Control Lines (because there are 4 repeating groups). You basically follow the same steps outlined in my video - except there is one issue with your sequence: A appears in all 4 groups! But no matter! All you have to do is connect the "left" of DCV_A to **both** CL_2 **and** CL_4 (because groups 2 and 4 have A+), and connect the "right" of DCV_A to CL_1 and CL_3 (because groups 1 and 3 have A-). Then it should follow the sequence perfectly. Only issue is the A+ right at the beginning of your sequence... My simplified sequence does not accommodate for that first A+; A will already be extended from the get-go in my sequence. Usually we work with repeating sequences, so I'm not sure how to handle that first A+, besides how I've explained it above. Let me know if it helps!
Cute