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IndustryArena Forum > WoodWorking Machines > DIY CNC Router Table Machines > Pneumatic Diagram Spindle - feedback
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  1. #1
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    Pneumatic Diagram Spindle - feedback

    I don't know much about pneumatics. I wanted feedback on this pneumatic spindle diagram. It seems like the 5>2 valve isn't necessary. This was provided by the ATC spindle manufacturer.

    The air requirements and runtime are:

    Dust Removal 3-5 seconds
    Air Seal - leave once spindle is started
    Air Return - 5 seconds
    Air Inlet - only to change

  2. #2
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    Re: Pneumatic Diagram Spindle - feedback

    5/2 way solenoid valves are used when one side of a device needs to be vented when the other side is pressurised, and vice versa.
    That seems to be what is happening in the diagram, so I think it is required.

  3. #3
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    Re: Pneumatic Diagram Spindle - feedback

    What he said. A 5/2 valve is needed to pressurize and vent a double-acting air cylinder. When one side of the cylinder is pressurized, the other side must be vented so the air could escape. The 5/2 valve does this with a single control signal.

  4. #4
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    Re: Pneumatic Diagram Spindle - feedback

    Alright, it just seemed like the solenoid after the 5>2 valve (coming off of A) was redundant. I guess I need to read about each port again to understand what has to happen and when.

    Are these solenoids traditionally triggered by M codes in the g code?

  5. #5
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    Re: Pneumatic Diagram Spindle - feedback

    Quote Originally Posted by district7 View Post
    Alright, it just seemed like the solenoid after the 5>2 valve (coming off of A) was redundant.
    No, it's not redundant:

    The air requirements and runtime are:

    Dust Removal 3-5 seconds
    Air Seal - leave once spindle is started
    Air Return - 5 seconds
    Air Inlet - only to change

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