Anyone have an idea how to connect 2 pressure regulators (40 & 60 psi) to a single output (disc brake) and relieve the pressure when switching from one regulator to the other as the brake changes from CW to CCW rotation
Just to head things off…
Is this for official match play?
You can most certainly accomplish this, however, as far as I know you can’t have multiple solenoids per actuator port per official rules.
To do this in a manual compliant manner, without some crazy trickery, you would likely need 2 separate calipers, one for each pressure level.
The only other solution that is legal that I can think of off the top of my head (i think) is putting ~20lbs of back pressure on a double acting cylinder using 2 seperate single acting solenoids.
Outside of official match play you could vent to atmosphere to a level of 40 psi via an inline solenoid
(All this is off the top of my head, i did not open the rules)
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This isn’t exactly what you are looking for, but you could use a single regulator with a manual control knob and attach a servo to it to allow you programmatically set the output pressure. Something like this: Pressure Regulator with 1/4 in. Press-in Tube Fittings - AndyMark, Inc
For reference:
You could plumb the outputs of one solenoid into another, using the first as a “pressure-selector”. You would want a check valve on both outputs to prevent back-flow. I’ve done this before to create 2 different pressure values for the closed state.
The easier way, as the blue box points out, would be to use a shuttle valve, which takes two inputs and outputs whichever has the greater pressure.
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