Questions tagged [pneumatic]
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84 questions
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What is a good approach to create a powder dispensing system for a home project?
I have this task where I need to dispense a certain amount of powder (small quantities, around 10g or so), onto trays that are stacked on top of each other with a space of about 20cm between each tray ...
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What is the correct equation for McKibben force output calculation?
I found this post, but no matter how many times I try, either in radians or in degrees, the results are simply weird.
My "correctest" result was -179533.
The dimensions are 100mm of length, ...
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What is the difference between side-channel/regenerative/ring/vortex blowers?
I am looking to write a Wikipedia article for side-channel blowers, but I have some big confusions that are not being alleviated by my attempts at research.
There are certainly two distinct ways that ...
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I don't understand how the pneumatic control precession actuation on the Brennan Monorail's gyros further balances the vehicle
I linked a YouTube video from Primal Space, The Self Balancing Monorail, discussing how the Brennan Monorail works.
@6:40 timestamp the narrator explains how the pneumatic pressure "[pushes] the ...
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Is there any difference in performance when using a small pipe diameter for a greens bubbler?
So a greens bubbler is a setup that helps the farmer cleaning greens/ gets/ fruits by agitating the water.
Details here: https://blog.uvm.edu/cwcallah/2021/10/06/building-a-better-greens-bubbler/.
In ...
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How to handle air pressure circuit with very different setpoint values
I'm a hw/sw guy, with a very limited knowledge about pressure/pneumatic circuits.
For my new job I have to design a closed-loop controller to inflate and maintain two chambers with a given pressure. ...
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Do cheap, low pressure (~0.25psi) pneumatic components exist?
I am working a design project (a bubble CPAP machine) for one of my classes and though the device is pretty simple, finding components for it is a nightmare. Essentially, a pump feeds air through a ...
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Piston Compressed Pneumatic Cannon
During an discussion with friends regarding pneumatic cannons, I came up with this gem :). Piston power pneumatic cannon. My friends however, didn't share my excitement regarding this revolution in ...
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How to calculate the torque of pneumatic rotary vane actuators?
In a development by Festo (BionicCobot), a rotary pneumatic actuator was used.
It is also similar to Kinetrol vane pneumatic actuators.
I have a question what is the formula for the torque of such ...
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What are the Units of flow coefficient Cv? And relationship between flow coefficient Cv formulas of incompressible and compressible fluids
I tried to understand flow coefficent Cv of a valve. There are many similar discussions on the Internet, e.g.,
https://www.pneumatictips.com/what-is-the-flow-coefficient-cv/
There are two formulas for ...
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Displacement and force control with pneumatic cylinder
Good day,
I was confronted with the task to develop a new controller for pneumatic cylinders. The control channels are displacement and force. A load cell is used to measure the force (analog signal). ...
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How would you solve this task of a pneumatic machine?
Engineering student here.
Pardon the lack of knowledge in English :)
So the objective is:
When you click on the Start Button then it turns Cylinder C on and then Cylinder B on, later it turns Cylinder ...
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Why would the compressor provide more pressure than necessary? Isn't the pressure determined by the resistance?
I clearly misunderstood something
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How to build a hydraulic standing desk?
I am trying to build a standing desk but I want it to be wireless (aka - no electricity needed).
My idea is:
have 4 hydraulic pistons that extend (from 60 cm (25in) to 120 cm (50in)).
They will be ...
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How to calculate the terminal velocity of grains in a pneumatic conveyor?
Here is the main question I got from a textbook:
Rice is transported by a pneumatic conveyor. The particle density is 1.4g/cm³. The major, intermediate and minor diameters are 1cm, 0.3cm and 0.4cm ...
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Passive gas mixing valve that takes fixed ratio of gas from two different inputs
I am designing a device that requires a gas (air) valve that takes the same volume of gas from two different input ports IP1 and IP2.
The output port OP will have lower pressure than both of the ...
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Pneumatic pressure sensing in a moving air compressor line
I am building an automatic control system for an compressor that stops at a designated pressure. Here's a rough sketch of the system:
The compressor should receive the on signal from the ...
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Confusing terminology for "normally closed/open" - It means the opposite in electronics (relays) versus fluids (valves)
I'm an electrician and "normally open" / "normally closed" is well known to me. I recently started to also work on heating systems including the pneumatic system that controls some ...
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What is the standard connector on reusable whip cream dispensers?
The male connection on a reusable whip cream dispenser cannister where charger cartridges are placed appears to be a standard size, as caps that are used to push and hold the charger cartridge are ...
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Is there anything close to automatic shuttle valve?
I am building a pneumatic system that needs an automatic shuttle valve. That means if I apply air pressure on one of the inputs In1, it closes the other input In2 and creates a path between In1 and ...
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Are there hydraulically actuated pneumatic valves?
I am working on a hydraulic system that is powered by an air-hydraulic piston pump, the pump uses pneumatic pressure to drive a piston which then pressurizes the hydraulic system.
The system needs to ...
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Why aren't pneumatic/hydraulic artificial muscle actuated humanoid robots more common?
I'm designing a humanoid robot using pneumatic artificial muscles. I chose these actuator units because
they're much cheaper than electric motors of comparable power output capability.
instead of ...
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Why are train brakes so complicated?
The concept is simple enough: no pressure in the train line has the brakes locked, full pressure is loose, and partial pressure drags accordingly. So if pressure is lost for any reason, the train ...
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Why do pneumatic valves need both a Safety Relay and an Air Dump to be safe?
If air dumps safely release pneumatic pressure from an industrial machine when an E-Stop is pressed, why is it also standard practice to cut electrical control power from the valves with a safety ...
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Pneumatic cylinder extension rod preloading
I've been working on converting a 500Kg pneumatic press to use it for injection molding.
In order to do that though I'd like to raise the cylinder up maybe 12". So I fabricated 4 5/8 CR rods and ...
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596
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Triangle symbol in pneumatic diagrams
After searching details regarding direction control valves, I can understand that the diagonal line indicates solenoid valve actuation. The zig Zag line represents the spring action so in this case ...
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Force control of pneumatic piston
I am building a small testing device consisting of a double acting pneumatic cylinder. I am using an existing pneumatic line running at 100 psi and I would like to control the force exerted by the ...
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Is a pneumatic cylinder in general a linear or rotary actuator?
I've just begun to learn pneumatics and I'm really confused where the pneumatic cylinder falls under in the categorization of what kind of mechanical motion it is suppose to produce. I've seen one ...
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What is the name for a low pressure, low volume air reservoir?
I'm working on a project that requires very precise, but low pressure controls. I'm using a pump to charge a chamber to <15kPa, then a manifold of proportional valves to control output pressures ...
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Pneumatic valve clicks but doesn't actuate
I am trying to build a door to a hidden room and want to use pneumatics to open the door. I have purchased some equipment to test with, namely a 12 inch Parker air cylinder and a U.S. Solid 5 way 2 ...
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What Rubber is Best for Laser Cut McKibbens PAMs?
I'm a layman engineer who's decided to take another step forward in my research and work with McKibbens Pneumatic Artificial Muscles. I’m new to creating custom rubber components and laser cutting, so ...
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Circuit to provide position control for double action hydraulic actuator
I was wondering how to construct a hydraulic circuit to control a hydraulic double acting piston/actuator enabling the electronic control of the piston extension. I have found the following pneumatic ...
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Can air flow occur in both directions in a 2 way solenoid valve?
I'm designing a system where I need to fill and exhaust air from an an air bag. The air will be supplied from a dc motor. As of right now I've been considering placing a 2 way solenoid valve for air ...
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How do I connect multiple water-filled syringes?
I'm trying to connect 4 separate syringes containing water and we need water-tight tubing to prevent water from leaking out of the system. The water would theoretically need to be pushed out of one ...
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Using Density Correction Factors for Fans and Blowers
I've been researching fans/blowers and their use in pneumatic systems (particularly conveying systems), and I'm confused by the application of density correction factors. Let me describe a sample ...
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How do I limit the pressure of a tank to a fixed PSI?
I previously asked about the safety of connecting my 150 PSI air compressor to my auxiliary 120 PSI tank. I was warned of possible compromise of the tank which can lead to injuries and even death. It ...
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Is it safe to use a 125PSI rated auxiliary air tank with a 150PSI air compressor?
I have a small, 5 gallon, pancake compressor which has a maximum 150PSI rating. Unfortunately, it doesn't have the air capacity to power the demands of an HVLP paint sprayer or a die grinder without ...
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How do I increase negative air pressure without inhibiting airflow?
I would like to increase the vacuum power of my desoldering station. It’s a multifunction unit that includes a single vacuum pickup tool, hot air wand and desoldering gun. When using the desoldering ...
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What is this pneumatic connector called?
I'm looking into fitting ball-type inflatable equipment (eg bike tires, yoga balls, basketball ball, etc) to a 2/4 silicone tube. This will be to measure the pressure inside the inflatable, so the ...
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How does 3 "liars" in Strandbeests work?
See video:
https://www.youtube.com/watch?v=75Z7-gmd_qk&t=226
This does not make sense to me. As far as I got it, bottom pipe is isolated from top 2 and just controls valve of the top 2 pipes. So, ...
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How to repair stripped, leaky pneumatic fitting?
I have a pneumatic cylinder with a stripped fitting, which causes a slow leak. I took it to a machine shop and he tried to re-thread it but there wasn't enough good metal left to get a good thread. He ...
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Linear pneumatic actuator opening time - pressurise connection pipe
I would like to estimate the time needed to open a linear single-acting pneumatic actuator.
The actuator's piston is loaded with a spring pushing downwards and the operating fluid (air or nitrogen) ...
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How to achieve pulsation damping in pneumatic rather than hydraulic system?
My background is in electrical engineering so I am something of a novice when it comes to pneumatic systems, but I have been tasked with designing a sampling system that draws an extremely low flow at ...
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Regulating pressure down inside vessel as it increases
I want to keep the pressure inside a balloon (effectively - a rubber vessel) constant, as the balloon is compressed. I'm wondering if a regulator like this (wiki page here showing mechanism - I ...
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What is the equivalent of a capacitor in pneumatics?
I am building a desoldering gun. While the pump I am using provides decent suction, I would like a quick powerful vacuum burst to prevent the solder from solidifying in the nozzle rather than in the ...
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Need to route air, like a solenoid does, but with many output directions
There might be a proper term for what I'm looking for, but forgive me, I'm not a professional engineer. I have a small cylinder with compressed air that connects using push-to-connect's (like these). ...
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Can I submerge a pneumatic cylinder in oil?
I am looking for a linear pneumatic cylinder to raise and lower a fixed object. Everything will be submerged in oil (for electrical purposes). I am new to engineering and pneumatics in particular, and ...
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Emulate impact forces using pneumatic piston
I am trying to test a piece of furniture based on a particular code, the code states that i can either drop a bag (with a specific shape) of 57 kg 1.2 in above the seat or I can use other methods as ...
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How to ensure uniaxal and uniform force application on uneven samples using pressurized fluids
I am trying to apply a compression force to samples using air. I do not want to directly apply my loading since my samples are irregular. I do not wish to process them with a flattening step. I hope ...
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Designing a pneumatic system for consistent pressure/flow
Fellow engineers, I need your help in improving my design for a pneumatic system for maintaining a constant supply of at least 90 PSI and 20 CFM for a particle analyzer with stringent air requirements....
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