Arm Definition and 201 Threads

hi everyone, I'm a mechatronics student. I'm sorry i posted this question here. I hope i can get some tips/answers/designs(rough design) http://i101.photobucket.com/albums/m62/minmonster57/Robot_Arm_Design.png I'm having this Robot building project. And faced a designing problem, This...

Homework Statement Compute the angular velocity (ω) when the arm reaches 45 degrees equation = ω^2 = ωi^2 + 2α(Δθ) α = 196.85 Homework Equations equation = ω^2 = ωi^2 + 2α(Δθ) The Attempt at a Solution 2(196.85)(45) ?? what do i use for ωi^2? or is it just 0

I have to find the speed that the end of the arm goes. Can anyone help i attached a diagram

Hi guys, I'm doing a robotics project that requires me to compensate for the bending of the arm due to an end weight. I can calculate the deflection at the end of the arm for a given weight e.g. End link horizontal (90 degrees), end weight = 1000g, deflection = 10mm From this i can calculate...

Homework Statement If a torque of 55N.m is required and the largest force that can be exerted by you is 135N, what is the length of the lever arm that must be used? Homework Equations Lever Arm=(r)(sin) Torque=(Force)(r)(sin) The Attempt at a Solution To be honest, I'm stumped

So, like quite a few others on this forum, I am building a trebuchet for a school physics class. While I am really enthusiastic about the project (who doesn't love giant medieval war machines?), I may be a little bit over my head in the calculations. So I hope I can give enough information...

http://builders.reprap.org/2009/09/bambot-bamboo-robot.html I want to see this design move forward. Before I can work on the mechanical engineering aspects of the motors: I want to work on my position control system. (Cheap geared DC motors like those from solarbotics/chinese drill motors...

Homework Statement Doc Holliday takes his last shot of whiskey. His forearm and hand spans 18" and weighs 2lbs. The shotglass and its intoxicating contents weighs 5ozs. (there are 16 ozs in one pound). Doc remains otherwise motionless as his elbow bends, tossing back the whiskey. Calculate...

Part 1 - Question About Torque Of Lever Arm in a 1st Class Lever Homework Statement A little while back I posted a question about incorporating the torque of a uniform mass and dimension lever arm into the principle of a 1st class lever. Here is the thread for reference...

Hi guys, I'm working on a prototype for a lamp and have quickly overreached my meagre school boy mechanics skills, almost at the first hurdle, in fact. Embarrassing, I know, but hopefully some kind soul here will be able to point me in the right direction. A picture is worth a thousand words...

Hi :smile:! I am doing the steering of our FSAE(formula racing car). will be using rear steer with a lot of ackermann. One particular strategy i came across for finalising stering arm angle is, you vary your steering arm angle (angle seen in plan between steering arm and uprights) so that...

I'm having some trouble working out the required torque for a motor to lift a robot arm for my university project. My design is cable driven so all the power has to be transmitted thorugh cables with motors at the base. please could anyone help me work out how much torque is required to lift...

Hi I am trying to designing a robot arm but am having problems calculating the torque required to drive the main shoulder joint. The arm is 700mm long and weighs 3Kg with a mass on the moving end of 6Kg. The arm is required to rotate repeatedly through 180deg then reverse back to the starting...

I am a student at ungku omar polytechnic.i want to ask someone that is good in engineering robot.i want to know how to make the cylindrical robot,do i have to used ball screw or belting as an actuator.I want to a build a small robot only about 550mm long and 650 mm hight.It can pull load of...

I saw a youtube video featuring a floating arm catupult, but I don't quite understand how it works. Could someone give an explanation to help me understand?

Universal joint/ball bearing... controlled rotating arm for a furniture fitting Hello forum, I need your help on a furniture project we are developing in the office. its basically a floor standing lamp which needs to have a user regulated rotating arm. We are right now looking at different...

I know the smell is produced by bacteria, but will an odour less person live longer than a smelly one? the bacteria must rob some of the life force from a body?

A man holds a 169 N ball in his hand, with the forearm horizontal (see the drawing). He can support the ball in this position because of the flexor muscle force M, which is applied perpendicular to the forearm. The forearm weighs 21.4 N and has a center of gravity as indicated. (a) Find...

Homework Statement (a) Calculate the magnitude of the force, FM, required of the "deltoid" muscle to hold up the outstretched arm shown in the figure. The total mass of the arm is 3.3 kg. (b) Calculate the magnitude of the force FJ exerted by the shoulder joint on the upper arm...

Homework Statement Homework Equations T=Fl The Attempt at a Solution I'm not sure what the moment arm of this problem is. I think it is suppose to be a line connecting 0 to F1 at a right angle. To draw this moment arm one would have to extend F1 past where it meets A. However I...

Hi, I have a college project running for which I have to design an automatic car refuelling cell. This includes automatic robot positioning, automatic payment, assisted car alignment et cetera. I like to stress that neither I nor my fellow students are mechanical or electrical engineers...

Homework Statement An athlete at the gym holds a 2.2 kg steel ball in his hand. His arm is 74 cm long and has a mass of 4.0 kg. What is the magnitude of the torque about his shoulder if he holds his arm in each of the following ways? 1) Parallel out to his side 2) Straight but 35 M below...

Same arm, same place, fell in the backyard, same place as last time, third break. I didn't faint, although I came close. The Evo Child is on her way over, she wants to drag me to the ER, but I have a doctor's appointment in the morning anway.

Homework Statement An open glass tube of uniform bore (uniform inner diameter) is bent into the shape of an "L". One arm is immersed into a liquid of density \rho and the other arm of length l remains in the air in a horizontal orientation. The tube is rotated with constant angular speed...

I forgot about this for about 2 years. It all started, in the summer a few years back. My hand started swelling in a little patch on the top of my hand. I scratched it and it proceeded to swell up into a painful lump. (Is it always the case that swelling on the hands becomes painful due to the...

Hello, I'm an electrical engineering student and I've decided to build a robotic arm as a final project for one of my classes. Basically, my skills as far as building circuitry and solving electrical problems are at an intermediate level at this point, however, I'm not too familiar with the...

Homework Statement Find the moment of Inertial of a hoop at the end of a arm. The axis is at the end of the arm and normal to the plane of the hoop. Let: M= mass of the hoop r= radius of the hoop m=mass of the arm d=lengh of the arm Homework Equations I_{hoop} = Mr^2 I_{arm}...

Homework Statement A 21.5 N weight is held in the outstretched hand of a person with a shoulder-to-elbow length of 33.5 cm and an elbow-to-wrist length of 23.0 cm. The center of the weight is 6.5 cm from the person's wrist. Determine the magnitude of the torque about the elbow produced by the...

Homework Statement Just looking for a general response - calculating required torque when there is a supoprt arm like in the attached doc. If there was no arm ... it's just F*d, but I guess the arm supports some of that force, so less torque is required? Homework Equations The...

I'm currently designing the mechanism for a basic cylindrical robot arm. It must be capable of lifting max 2kg of item. The robot arm looks like ST Robotic R19 model. It moves in X and Z direction plus rotation at base and arm. The robot should looks like the attachment below. Can u please...

Folks, hopefully someone can assist me. I am a EE by education and am in the process of designing a mechanism that I need some assistance on. The basic issue I face is determining the torque needed for a miniature drive motor/gearbox for this mechanism. The problem, I think, might be fairly...

If I swing my arm, it can emit gravitational waves?? If I swing my arm, it can emit gravitational waves?? Thank you in advance!

I'm working on a developing a position control system for a robotic shoulder joint driven by a DC motor. To simplify, the robot arm can be viewed as being in a fully extended state. I have now reached a stage where I can no longer ignore the affect gravity has on the torque generated by the...

hello- i had this problem: the arm of a crane is 15.0 m long and makes an angle of 20.0 degrees with the horizontal. assume that the maximum load for the crane is limited by the amount of torque the load produces around the base of the arm. a) what is the mximum torque the crane can...

You are able to hold out your arm in an outstretched horizontal position because of the action of the deltoid muscle. Assume the humerus bone has a mass m=3.6, length L=0.66 and its center of mass is a distance L1=0.33 from the scapula. (For this problem ignore the rest of the arm.) The deltoid...

Recently I saw an infomercial for an ionized arm band thing which is supposed to improve your health. It seems like people think its works, and it supposedly has a patent on it, but how it works (if it does at all) was not explained in any detail. Does anyone know anything about this? I could...

I'm a karate instructor desperately trying to find a model or formula that explains what happens to the to speed and acceleration of a limb under varying conditions. If you assume that a limb has a travel distance of 3 feet, moving from stationary, and the limb weighs 5 kilos. If I assume...

The big event of the softball season, the Women's College World Series, begins Thursday. One aspect I find interesting is that many of the dominant pitchers are very tall. Many of you are probably familiar with the underhand delivery of fastpitch softball, which implicates angular motion. The...

Hi, I'm not able to work through part of a question and I would like some help with it. Firstly, I apologise for the lack of a diagram. The situation is this: First draw up the usual XY axes. A slotted arm (for the diagram it can be considered as a hollow retangular prism) has one end fixed...

A lunch tray is being held in one hand. The mass of the tray itself is 0.201 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.33 kg plate of food and a 0.285 kg cup of coffee. Assume lever arm of the thumb is 0.0620 m, lever arm of the finger is 0.113 m...

An arm has a mass of 7.0 kg. Treating the arm as if it were a single point mass m attached to a rigid massless rod, determine the work that must be done by the deltoid muscle to move the arm from position 1 to position 2. (Position one and two have an angle of 30 degrees between them and it is...

Hi... I've seen a lot of tractors, they seem to have a shiny aluminum on their arms.. Are those pumps?? What are the advantages of using them? And how to configure them, do they power by motor? Please explain in details, thank you.

Hello, I have a question regarding creating a "mechanical" arm which would have the ability to move freely in 2DOF ( ie. lift up and back down , kind of like our human arms, but when it goes down, it can go down a lot further than we can ). I saw bots like ASIMO use those umm... looks like...

Hi, I have a big problem... I got a project on building a catapult. Easy, right? WRONG! We are supposed to determine the arm length without trial and error and I have no clue what to do. Please please help! Catapult is supposed to be built with 3/4" paper clamp as the only energy source and...

I can get pretty far in this question, but I can't seem to get the final answer. The problem is: Calculate the force required by the "deltoid" muscle, Fm, to hold up an outstretched arm. The total mass of the arm is 3.33kg. On the diagram, the pivot point I chose is the shoulder socket, and...

I have collected 5000 points of data from a sensor on a rotary arm (which I was trying to control to move with a position time graph that follows the pattern of a square wave) My question is, once I've plotted the graph in excel, how can I overlay a perfect (theoretical) square wave to show...

My Mobile Hurts my fingers ... hands .. then whole arm! Hi, My mobile went messed up for sum reason and i have stopped using it now. It used to make my fibgers hurt...it got worse and worse until it made my fingers numb in a matter of minutes if i used it. Thne it hurt my whole arm one day...

am doing mine for distance should i have a long lever arm or a short lever arm, and how long should it be? and should i use a like a rubber string or just a normal one and how long should that be? thanks if you can reply by today

Well, we all know that the farther you move the point of force application from the point of rotation, the greater the torque. But why? I know the equations, but I am lacking a physical explanation of why this is. The best explanation that I've gotten is something along the lines of a...

linky: http://www.washingtonpost.com/wp-dyn/articles/A46460-2003Nov15.html CIA Finds No Evidence Hussein Sought to Arm Terrorists By Walter Pincus Washington Post Staff Writer Sunday, November 16, 2003; Page A20 The CIA's search for weapons of mass destruction in Iraq has found...