Implement pneumatic control?

A button should be pressed so that cylinder MM1 extends and then retracts. Once it is retracted, cylinder MM2 should extend and retract. I tried it in Fluid SIM, but after several attempts, it didn't work.

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Hafnafir
3 months ago

What components do you have? If it is to function as you are describing, I would either set a transmitter which, when the cylinder MM1 is retracted, switches the extension of MM2 when MM2 is extended, a transmitter which switches on the drive-in and once a transmitter of the MM1 is retracted.

The best 5/3 way valves, you can then set the next switching point with simple transmitters when reaching the end point.

Condition for extension MM1 must be: MM2 retracted, switching pulse extended valve 1. MM1 retracted, switching pulse valve 2 . . . MM2 can only extend when MM1 is retracted, so supply via T-piece retraction MM1, MM2 is extended, switching pulse to valve 2 for retraction.

mihisu
3 months ago

I don’t know where exactly you have problems. But probably your problem is with a signal overlap. And that may have a little to do with the two moments…

  • cylinder -MM1 is retracted; Cylinder -MM2 is still retracted and is now to be extended, while -MM1 remains retracted
  • cylinder -MM2 is retracted again; Cylinder -MM1 is still retracted and should now move out while -MM2 remains retracted

… are probably hard to distinguish for you.

There are different ways to solve this.

===== 1. Possibility: tilting roller valves ========

It is possible to use tilting roller valves which are actuated by the piston rod only in one direction of movement and are arranged in such a way that the actuation shortly before reaching the respective beginning or respectively. End position is solved.

A corresponding pneumatic plan could look like this…

However, the solution with tilting roller valves has a few disadvantages. In particular, the end position cannot be interrogated precisely since the actuation is released again shortly before reaching the respective end position.

=====2. Possibility: changeover valve ==========

It is possible to use a change-over valve in order to supply only the valves with compressed air which are required, while the other valves do not receive compressed air in order to avoid signal overlaps.

A corresponding pneumatic plan could look like this…

Jannik666
3 months ago

What are you using?