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O-ring Typical O-ring and application The O-ring may be used in static applications or in dynamic applications where there is relative motion between the parts and the O-ring. Dynamic examples include rotating pump shafts and hydraulic cylinder pistons. Manufacturing[edit] O-rings can be produced by extrusion, injection molding, pressure molding or transfer molding.[1] Robotics Design Process Robotics Design Process Defining the Problem identifying the purpose of a construction identifying specific requirements You are confronted with a situation. Here are two examples: A community wants to construct a robot zoo in which the "animals" move their heads, open their mouths and make appropriate sounds when they sense that someone is coming towards them.

Twice Baked Potatoes, Two Ways Hiiii Abby!!! This blog post is dedicated to Abby. Abby emailed me a few weeks ago requesting a recipe that could be made in the microwave. You see…Abby is shacking it up in a dorm this year with only two kitchey-type tools at her disposal: a microwave and a mini-fridge. And since she wants to spend her money on more important things like booze, shoes textbooks, she wanted it to be budget friendly. No biggie, Abby; I got you, gurrrrl! Top 10 Tech Concepts You Always Wanted To Learn About (But Never Did) Store your data on someone else's computer, hope they don't do anything bad with it or decide to shut down. Stallman calls it "Careless Computing". If you put personal data in-the-cloud like future plans., trips, your current GPS location, then you should expect that data to be shared all over the world with nice people, nice companies and criminals (looking for when to rob you). Facebook connections and twitter followers provide information about you and your friends.

Fluid bearing They can be broadly classified into two types: fluid dynamic bearings and hydrostatic bearings. Hydrostatic bearings are externally pressurized fluid bearings, where the fluid is usually oil, water or air, and the pressurization is done by a pump. Hydrodynamic bearings rely on the high speed of the journal (the part of the shaft resting on the fluid) to pressurize the fluid in a wedge between the faces. Fluid bearings are frequently used in high load, high speed or high precision applications where ordinary ball bearings would have short life or cause high noise and vibration. How stepper motors work Stepper motors consist of a permanent magnetic rotating shaft, called the rotor, and electromagnets on the stationary portion that surrounds the motor, called the stator. Figure 1 illustrates one complete rotation of a stepper motor. At position 1, we can see that the rotor is beginning at the upper electromagnet, which is currently active (has voltage applied to it). To move the rotor clockwise (CW), the upper electromagnet is deactivated and the right electromagnet is activated, causing the rotor to move 90 degrees CW, aligning itself with the active magnet. This process is repeated in the same manner at the south and west electromagnets until we once again reach the starting position.

Dumbbell Exercises On to the exercises... Print this page out and take it with you to the gym or use it at home. Give yourself a full week to get accustomed to the dumbbell exercises before you start lifting heavier weights. General guidelines For Dumbbell Exercises Roy Reid Comedy – Canada's #1 Source For All Things Comedy Like us on Facebook and Stumble the posts to get access to more Shit I Want Wednesdays

 Rolling and Plain Bearings Bearings for rotary motion are designed as rolling bearings or plain bearings. A distinction is drawn as to whether the forces occurring between the parts movable relative to each other are transmitted by rolling or sliding elements. Rolling bearingsRolling bearings generally comprise two bearing rings with integral raceways. Rolling elements are arranged between the rings and roll on the raceways. Rolling elements can be balls, cylindrical rollers, needle rollers, tapered rollers or barrel rollers. The rolling elements are generally guided by a cage that keeps them at a uniform distance from each other and prevents them coming into contact with each other.

Mechanical drawing - Jones Free metalworking and woodworking plans This category of our site contains a large number of free metalworking and woodworking plans that are suitable for both beginners and experienced craftsmen. Each plan that we have published contains the basic text on the product purpose, product image, exploded view with parts list, detailed assembly drawing with characteristic dimensions of assembly, detailed and precise drawings of each part, drawing with separated standard parts and detailed step-by-step instruction for assemblage in words and pictures. Free 3D models Nowadays more and more various CNC machines and 3D printers can be found in small workshops or at various DIY enthusiasts. There are many cheap machines that you can buy, and the Internet offers a number of DIY plans that you can use to make your own CNC machine and 3D printer.

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