fun4sparkie
Mechanical
- Aug 9, 2006
- 26
I am trying to get ideas on how to sense when a equal acting hydraulic cylinder bottoms out on extend and retract. Do you have any ideas? I wanted to do this without limit switches.
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Cylinder position
- Thread starter fun4sparkie
- Start date
- Status
horsefeather, is it possible in your system for the cylinder to be stalled mid-stroke? This would give a false pressure indication that the cylinder reached full stroke.
If stalling mid-stroke is not possible, then a pressure switch will work for you.
Ted
If stalling mid-stroke is not possible, then a pressure switch will work for you.
Ted
horsefeather
Aerospace
Anything is possible.
My particular application is 3000 psi with a 28" travel and is used to crimp and shear oilwell pipelines.
Watching for the pressure dip on a gauge is how the operators determine closure now. The system is visually inspected (exercised) for correct operation before operations begin and the pressure drops are noted and signed on a chart recorder. This provides a reasonable assumption that the system will work in the vent of an emergency.
If absolute certainty is required that a piece of iron must be at a particular position, I agree with previous posters that a position sensing sensor (micro-switch, LVDT, etc) be used.
My particular application is 3000 psi with a 28" travel and is used to crimp and shear oilwell pipelines.
Watching for the pressure dip on a gauge is how the operators determine closure now. The system is visually inspected (exercised) for correct operation before operations begin and the pressure drops are noted and signed on a chart recorder. This provides a reasonable assumption that the system will work in the vent of an emergency.
If absolute certainty is required that a piece of iron must be at a particular position, I agree with previous posters that a position sensing sensor (micro-switch, LVDT, etc) be used.
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