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    Specifications for elephant-resistant steel poles

    Why dont you disguise the camera inside another animal's costume? How often do animals kick other animals?
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    Source for tiny U-joints

    Possible 3D printing job?
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    Hepa filter specifications/ blower match

    Hey, What are you trying to grow over there ;)
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    Sourcing a Diverter Valve for Regenerative Blower

    I am at a loss for trying to find this part, it seems like only 1 or 2 manufacturers produce this, But I'm sure it is more common than that. This is an attachment that goes on to the inlet/outlet of regenerative blowers, and with a solenoid, allows the output port to switch between vacuum...
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    Single spool directional control valves

    Give an update on what you find out. I'd like to know who they recommend.
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    Does a capsized boat of iron float?

    Well, then they'd fill it up with co2 Eat some beans and asparagus, and that boat might flip back upright.
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    Advice for the design of an automatic door opener

    True, though I dont see how this concept can't be applied vertically with a stronger motor. Its basically how all windows open, use rotary motion to swing open the windows. That example is a bit more complicated with a rail and bushing,
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    Does a capsized boat of iron float?

    How about the trapped air once it flips? that should help it float
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    Advice for the design of an automatic door opener

    Maybe: http://www.thingiverse.com/thing:134236
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    Effect of off-center mass on guide rails for acceleration

    Hi, There is a mass that sits on a bridge between 2 parallel actuator (2 axis gantry), and slides on linear guides. If the mass is not centred, and close to one side of the drives, would that require that 1 of the actuators to put out more force? or would it always be even? I figure you might...
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    Scissor lift hydraulics

    I'm taking a guess here: If your oil reservoir is topped off, its possible there might be a leak in the seal of the piston, in which case, you might need to replace the faulty cylinder.
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    Automatic opening lid stay

    The way I was taught to design gas springs, was to pick an equilibrium position (Somewhere in the middle of your stroke) Where your mass has a 0 net moment and force. Work out the moment questions + force equations to figure out how much force you spring needs. Your dimensions, angles should be...
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    Cutting a Groove -- Power Requirement

    Are your units correct? I see some mm then m/min. I didnt read the background, but that could be a reason. Edit: NVM, m/min is your RPM
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    Prop Shaft load parked on a grade

    pounds is a unit for weight not mass, already includes gravity.
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    Tolerance management problem

    I guess each part would be manufactured differently, so each would have its own tolerance. But what you said makes alot of sense, the hole with the positive tolerance, the bolt with the negative tolerance.
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    Tolerance management problem

    I'm trying to learn from your example myself. Couldn't you define your 3 sigma point (or 3 standard deviations away from the perfect) as being your worst but acceptable tolerance. And your mean as the perfect scenario.
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    Tolerance management problem

    So it seems your worst case scenario shouldn't exceed 0.4mm, so you would need to assume ALL the links are not perfect.
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    Does a Belt drive actuator isolate motor vibration?

    That's an excellent point, that if the belt is rigid enough, it could act as a source of vibration. I never considered that.
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    Does a Belt drive actuator isolate motor vibration?

    Well from what i've read is that sometimes motor rotors can be out of balance, which at higher RPMs would cause the motor housing to shake and consequently the bracket holding the motor. Now usually this is negligible, however for some precision applications, this has a potential to affect the...
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    Does a Belt drive actuator isolate motor vibration?

    Trying to build a case for a belt driven ball screw axis versus a Planetary gear box, with the fact that the motor vibration would carry down the gearbox to the axis, but the timing belt drive would isolate the motor vibration. How would I model this? and ideally a way to get a factor of...
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    Making a shop press using a electric motor

    Reminds me of this video:
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    Making a shop press using a electric motor

    A fine pitch for lead screw combined with a high gear ratio driving the lead screw. You could use a ball screw if accuracy is needed.
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    Static coefficient of friction between copper or brass

    Whats your the pitch of your screw? Also the angle at which the contact is made between the 2 points, I imagine the force to calculate friction would be from the axial force created from turning the screw.
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    Automotive Powering the surrounding neighborhood using friction from passing cars

    Thats a really interesting concept: electric cars finding ways to regenerate different sources of energy. I really liked the car shocks idea mentioned earlier.
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    Automotive Powering the surrounding neighborhood using friction from passing cars

    I think the technology may not be a necessity now, but I imagine if there were remote areas that could not generate electricity through wind, solar, or fossil energy, this could be used in any environment that there is a source of traffic (people, cars, trains). To counter the loss of the car...
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    Flow rate of air in discharging reservoir

    I had a similar question regarding air flow through a nozzle. The best bet is to look into flow through an orifice, also choked flow.
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    Automotive Powering the surrounding neighborhood using friction from passing cars

    I remember seeing a project, not from heat generated, but from mechanical stress applied to the material: Piezoelectricity also check out "Sustainable Dance floor"
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    Trying to calculate the volume of gas flowing through a nozzle

    Actually, your right, Orifice plate does have a WOW! That is wonderful, thank you for taking the time. When I convert my cfm to scfm, I end up to 4.58 scfm (very close to actual). Just to confirm, the flow orifice coefficient is factored in by dividing scfm by the coefficient?
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    Trying to calculate the volume of gas flowing through a nozzle

    Well, I don't have the flow rate, or the speed. Thats what I'm trying to figure out. And the assumption was based on some other posts I've read, regarding choked flow.
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