Machine Definition and 968 Threads

Any ideas about where I can hire a CNC machine designer for a personal (non-commercial) hobby project? I've emailed various people who are prominent (at least on the web) in hobby CNC designs and have received zero responses. Maybe my ideas are too wierd. My interest is in the programming...

All that's left to write in my lab report is the conclusion, and I'm failing to understand what my professor is requesting of me. In the guidelines it says, "Compare your measurements to the expected values. State and discuss whether your results are in agreement with the expected...

Someone has way too much free time on their hands. http://devour.com/video/giant-knex-ball-machine/

I'd really like for someone to explain the last bit of the equation used in the Atwood's Machine experiment. [Forget this gray part]Specifically, I don't understand what F means in F = Mg - mg = (M - m)g, and would appreciate that being defined. Secondly, I don't understand why a = F/(M+m) is...

Hello, I am looking for any exercises about State Machines, Mealy and Moore Machines, so I could study for my test. I have already googled it, but it's kind of hard to find something. Does anyone recommend a book or site, with some good exercises? Thanks in advance

Hi All, I was wondering if anyone could post some videos or some websites where I can read about Dynamics required for Mechanical Engineering i.e. related to vectors , how to add vectors , how to find the resultant. I searched YouTube but I am not really getting any good responses. I am a...

Homework Statement Please see the attached photo. (The one with the green highlighter), I haven't written it out to avoid mistakes. Homework Equations None. The Attempt at a Solution I have constructed a moore state diagram, a state transition table and come up with boolean...

In the bean machine, we usually drop the balls from the center of the top right? That's the reason why most of the balls accumulate in the middle bin. If you drop the balls from the top right corner (say) then balls should fall in the bins in the right side, right? Thanks a lot.

So I have a degree in Mechanical Engineering, access to a machine shop, and all the free scrap metal I want (steel or aluminum mostly). I also make perilously little income because I'm just a measly intern. I have a stash from my last job that is keeping me running until I can convince my...

I'm working my way through pattern recognition and machine learning using this http://www.cs.pitt.edu/~milos/courses/cs2750/ as a guide.Homework Statement We have to prove that a binomial random variable x, with a prior distribution for \mu given by a beta distribution, has a posterior mean...

Lubrication -- is fine machine oil "better"? So there is always a debate on gun forums over if lubricants marked for firearms are better then motor oil or cheaper automotive lubricants. I'm curious if anyone here has any hard information on the differences and what is better?

Hello, Imagine that we have a fluid heated up by solar energy (every day during sunlight). Due to higher temperature it would undergo thermal expansion and do some mehanical work while expanding, right? And during night it would cool down and hence compress and do some negative mechanical...

Homework Statement A system consists of a pulley and two masses m1, m2 haning from it as shown in the figure. The pulley is a disk of radius R with constant mass density that has two circular hole with radius R/2. Find the angular acceleration of the pulley. Figure attached. Homework...

Consider two stationary blocks of same mass suspended by a massless string over some kind of pulley. The net force on both of them is clearly 0. Now suppose we somehow gave on of them a downwards velocity by some kind of energy transfer. Then intuitively the block would start to fall down. But...

Our lab is looking at designing a new ECAP machine (Equal Channel Angular Pressing). It needs to be driven by an electric motor attached to a gearbox. From their modeling and data collected from their existing ECAP machine they are requesting the output shaft on the gearbox to have a 2,000,000...

Simply, what the title sugests, would going downhill on inclined plane be considered a simple machine? If so, how is this decreasing the amount of force needed?

At my work, we go through a lot of liquid CO2 (LCO2), and dealing with the 500 pound LCO2 dewars is a real pain. I'd like to look at options for us making our own LCO2 instead, but have been having trouble finding information about small-scale LCO2 generation on the web. We use the LCO2 for...

Homework Statement I currently am confused about a, probably, simple problem >.< Back in primary school and middle school, my science teachers taught me that one of the simplest examples of a wheel and axle would the the wheels of a car (in this case a toy one), which made sense to me at the...

Hi, First, I would like to ask for your apologize for my very bad english... My name is Frédéric Serrano, I'm a technician and I'm starting my own business. For a new contract my customer ask me to adapt his industrial machine for the USA. So I have to comeback to the basic rule. Here in...

I drink a lot of espresso. From my minimal knowledge of espresso machines, I understand that the water is heated into steam which creates pressure forcing the steam through the coffee grounds. After every batch of espresso I let the machine sit overnight unplugged. Presumably, the water gas...

I have worked out all relevant information (i hope) but I am unsure of how to work out the law of the machine from it. We've done a test and recorded our results of a Pully. We had to measure different loads and see what effort was required for each load. What is the formula for working out the...

What on Earth are these people thinking? http://shine.yahoo.com/parenting/worst-parent-week-dad-puts-toddler-washing-machine-183500809.html

Homework Statement Consider a modified Atwood machine, where one mass of 20 kg lies on a flat tabletop, and another mass of 5 kg hangs off the edge of the table, where the two masses are connected to each other by a massless string and a frictionless pulley on the edge of the table. The...

Hi, I am working on a project that involves classifying many 'situations' where there are some number of objects and the objects can be defined by the makeup and weighting of their parameters. There are probably 200-2000 parameters per object, 1 to 100 objects and hundreds of situations...

So perpetual work/motion machines are impossible, but I've toyed with this idea for a hypothetical, super massive, planetary-scale electrical energy generator for a while. Suppose you had 2 very large moon/planet-sized spherical magnets that were far enough so as to not attract magnetically...

I heard many time the word of Time Machine. Can the concept of Time Machine become true in future? what is your opinion...?

1 - I'm trying to see what's the difference between a Turing Machine and a universal Turing Machine. Aren't the same? 2 - If I have a Touring Machine that to solve a problem, for example, adding numbers, what is the purpose of a Universal Touring Machine?

I recently purchased an old small drill press. It hosts a retasked old washing machine motor as the power source. Only problem is that the wiring was snafu, and I could use some help with that. This is a FSP motor, 115 volt 1725 rpm, 1/3 horsepower. The motor input wiring are to a set of...

In the Turing Machine, the machine accepts a word if the computation terminates in the accepting state. The language accepted by the machine, L(M), has associated an alphabet Δ and is defined by L(M) = {w \in \Delta} This means that the machine understands the word w if w belongs to the...

Basically we did a lab where you attach a pulley to the desk with a clamp and then have a friction block (three types: cork, plastic, and felt) attached to a string which is attached to a hanging mass. This basic setup is called an atwood's machine. The purpose of the lab was to identify the...

Hello I am trying to start a small home business making soap. I am on a really tight budget and also very new to the extrusion process. While I may be extruding soap, I understand that the process is very similar to plastic extrusion. I want to extrude soap bars using a machine...

Homework Statement An Atwood's machine consists of two masses, m1 and m2, connected by a string that passes over a pulley. If the pulley is a disk of radius R and mass M, find the acceleration of the masses. Express your answers in terms of variables m1,m2, M, R, and appropriate constants...

Homework Statement An Atwood's machine consists of two masses, m1 and m2, connected by a string that passes over a pulley. If the pulley is a disk of radius R and mass M, find the acceleration of the masses. Express your answers in terms of variables m1,m2, M, R, and appropriate constants...

Hi, I am correcting a C code which was written for a flame machine. My desire is to give a burst cool time when the machine working continuously. In deep, user could have the facility to enter the flame time and cool time before a continuous operation. So, i exactly want to off the...

Hi guys, Im currently working on a spindle gear box and what is required from the gearbox is it to change speeds to 250, 500, 1000, 2500, 4000 rpm. I've done some research and seen some of the basic layouts of some gearboxes, mainly from a vehicles viewpoint, but what what i am not getting is...

one rubber coated roll weight 1000 kg. dia. 300 mm & face length of 6360 mm. bothe end shaft dia. 65 rotating in antifrictional bearings. i want to rotate the roll at 100 rpm within 60 seconds. so please help me out to find the HP required of geared motor of 1400 rpm input of motor &...

Homework Statement I'm trying to find the acceleration of the masses in an atwood machine, the pulley has a rotational inertia I. The pulley has a radius R Picture : http://en.wikipedia.org/wiki/File:Atwood.svg But I made it accelerate the other way, so the equations from Newtons 2nd law are...

I'm thinking of taking machine language over the summer because it seems interesting to me but I'm not sure if it'll be useful to my emphasis in computational physics. The objectives of the class are below, could anyone give me advice on whether it'll be helpful to me or not. Thank you. A...

Simple enough - I'm just trying to find the smallest positive real number, ε, such that 1 + ε ≠ 1 in MATLAB (double precision). So the value 'eps' in MATLAB is actually not quite defined this way, and using this program min = 0; max = 1; test = 1; while test~=(min+max)/2 test =...

Homework Statement Figure 5-53 shows Atwood's machine, in which two containers are connected by a cord (of negligible mass) passing over a frictionless pulley (also of negligible mass). At time t = 0 container 1 has m1 and container 2 has mass m2 with m1 < m2, but container 1 is losing mass...

I'm currently taking a Microprocessor course and we are adding to our breadboard week by week. The most recent add on was a UT6264CPCL RAM chip. Other chip specifications are given below in in 2. Homework Equations . My question is, how do we test to make sure that the RAM is working using two...

I need to build a rube goldberg machine for physics class and i am stuck on ideas. It must include circular motion, projectile motion, rolling motion, gravitational energy, kinetic energy, elastic enrgy, conservation of momentum, and electric or magnetic fields. It cannot be powered by more than...

Now I'm not a PMI (perpetual machine inventor). In fact I'm quite convinced that there is no such thing as that. But a while ago, I saw the schematics of a perpetual machine that is hard to debate. Well this is how the machine worked. The inventor argued that if you have two magnets as...

Hi all, You have probably seen these candy machines before. Tubes that contain candies of different colors and drop candies into a receiver once you inserted the coin. I was watching these more than a quarter of an hour at lunch time (waiting for someone to buy candy) and thought that...

Hello, I am in Grade 12 physics class and I have been given a open ended project; where we are required to build/create a machine which would involve at least 6 of the physics concepts: ramps, pulleys, levers, transfer of momentum/energy, projectile motion, circular motion, stored elastic...

Homework Statement Consider Atwood's machine with two masses, m1 and m2 with m1 less than m2. Now, according to application of Newton's third law, the system accelerates in the direction of the heavier mass (here, m2). This, however, seems to contradict Newton's third law, which implies that...

In:list5 = Import["Composites.csv"]; (*imports a list of odd integers each less than 1000000*) Timing[f=Compile[{{Caa,_Integer},{S0,_Integer},{S1,_Integer},{Co,_Integer}}, Module[{xCo=Co,xS0=S0,xS1=S1,Temp},While[Temp=Mod[6 xS1-xS0-6,Caa];xCo>0&&Temp>=1, xS0=xS1;xS1=Temp;xCo--]; xCo]]...

I am doing my internship in the factory produce pipe, kabel for automotive. We get one project from user to make a bended pipe... So far we bend it manually using some torsion tool and operated by human... The tug time is so high so we plan to make the machine if the cost is coverable...

This seems to be the new 'it' job in the tech sector and I'm considering getting into this line of work, but because it seems relatively new I'm having trouble finding out what it's like to work as a data scientist. The two things I'm somewhat concerned about is if the work is interesting or...

Homework Statement I have a modified atwood machine which is made up of a vertical mass hanger (hanging over the side of a table) connected to a horizontal cart (on the table) via a rope (un-stretchable) and a pulley (massless, frictionless, etc). The cart wheels have negligible friction...