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Computer Aided Design
Computer Aided Design (CAD) is the act of using computers to design an object. CAD techniques follow standard engineering design and drafting procedures, but use a computer to help speed up the process.
1,069 Questions
What is the difference between cad and auto cad and which one is better?
CAD is the generic name for all Computer Aided Design and Draughting software. Autocad is the most popular software provider.
TEMPSENS WAKE FREQUENCY CALCULATOR is easy to use and it also ensures that thermowell is designed within the dimensional limits of PTC19.3, 2010. This calculator establishes the practical design considerations for Thermowell installations in power and process piping, which also incorporates the latest theory in the areas of natural frequency, Strouhal frequency, in-line resonance and stress evaluation.
If the application is fulfilling all limits of the ASMT PTC 19.3, it means the Thermowell met 5 criteria:
- Operating temperature
- Wake frequency calculation (resonance limits)
- Fatigue stress
- Bending strengths
- Operating pressure
How do you convert the autocad dwg to Excel file?
First Answer is you don't. however you can make an image file of your drawing and insert that into excel.
Unless you mean an autocad table into excel, that you would select the table and right click, then select "export", that will save it as a comma delimited file (.cvs type), then you open that in excel.
Cad stands for:
Computer
Aided
Design
Cam is used to manufacture products. The term CAD/CAM implies both for designing a product and for controlling
Design manufacturing processes.
Cam stand for:
Computer
Aided
Manufacturing
Why is input waveform from a transformer altered from a pure sine wave?
The input waveform from a transformer is altered from a pure sine wave because the load is not purely resistive, meaning in this case that it is not "continuous". Many loads do not pull current "all the time" during each line cycle. A power supply, for instance, only pulls current when the filter capacitor is being charged by the rectifier. This is because the rectifier biases on to charge the capacitor to the peak value of the input waveform, then the capacitor discharges at a rate dependent on load while the rectifier is biased off, until the voltage intersects the next rising input wave. This means the current load on the transformer is actually pulsing on and off. (This is true for both linear and switching power supplies, although you can reduce the pulsing with appropriate inductance in the filter circuit and a more complex design.) Since the AC supply is not "perfect", i.e. having a Thevanin equivalent series resistance of more than zero ohms, along with cables that do not have zero ohms, along with transformers that are not "perfect", this pulsing current induces a pulsing deviation in the input AC waveform. This effect can be observed even without a transformer in the circuit, but transformers make it more measureable, because the transformers introduce additional "inperfection".
How can we find out First and follow in compiler design?
first:
1. If first character of production is terminal then becomes first.
eg. first(abAb)={a};
2.If a production of this type A->BCD...
means all are variable or non-terminal then
if first(B) donot contains null then
first(A)=first(B)
stop here.
else
then also check for next non terminal like C here
same as above step
and first(A)=First(B)+first(C).
if we get null stop there.
FOLLOW:
if you know first then you can easily go with follow.
1.if a variable is start symbol then follow=$.
2.if a production is of A->(any string1)B(any string2)
then
follow(B)=first(any string2) -{null}
3.if a production is of A->(any string)B
then
follow(B)=follow(A) .
stop
it is very simple, please try to understand!
really good answer, for more visit:www.cmail.99k.org
What is the term PS in engine power?
PS is a German unit for horse power.
This unit (German: Pferdestärke = horse strength) is no longer a statutory unit, but is still commonly used in Europe, South America and Japan, especially by the automotive and motorcycle industry. It was adopted throughout continental Europe with designations equivalent to the English horsepower, but mathematically different from the British unit. It is defined by the Physikalisch-Technische Bundesanstalt (PTB)[8] in Braunschweig as exactly:1 PS = 75 kilopond-meters per second(75 kp·m/s)×(9.80665 N/kp) = 735.49875 N·m/s ≈ 735.5 N·m/s ≈ 735.5 W ≈ 0.7355 kW ≈ 0.98632 hp (SAE)
The PS was adopted by the Deutsches Institut für Normung (DIN) and then by the automotive industry throughout most of Europe, under varying names. In 1992, the PS was rendered obsolete by EEC directives, when it was replaced by the kilowatt as the official power measuring unit. It is still in use for commercial and advertising purposes, in addition to the kW rating, as many customers are not familiar with the use of kilowatts for engines.
Advantages of using computer aided design in film making movies?
Computer aided design is not necessarily an appropriate tool for film making, unless there are structures required for the set that can be designed most economically using this tool.
What is the distance between CPU and ups?
cpu means central processing unit.it is known as brain of the computer.it gives commands to monitor for any things.
ups means unintruped power supply if there is no supply in the house then it allows the computer for operating for 10 minutes
How many commands are there in AutoCad?
Billions and billions :)
are you asking for the commands list or commands which are important and basic one......around 259= basic commands are their for autocad.
and for the list please go with this link: http://academics.triton.edu/faculty/fheitzman/commands.html
List and describe the different coordinate entry methods available in AutoCAD?
AutoCAD Coordinate Entry Methods
Absolute Method: (X,Y)
Absolute Cartesian coordinates specify a point's exact distance from the origin point of
the coordinate system, which is represented as (0,0). The absolute X and Y coordinates
are signed numbers.
Relative Method: (@X,Y)
Relative Cartesian coordinates specify a point's exact distance from the last point that
was entered.
For example, typing @4,2 tells AutoCAD to locate a point that is four X units and two Y
units away from the last point entered. The X and Y relative coordinates are signed
numbers.
Direct distance entry is a shorthand relative coordinate entry method.
Polar Method: (@Distance
Polar coordinates specify a point's exact location by a distance and angle from the last
point that was entered. The distance is always positive and the angle is measured from the
positive X axis.
For example, typing @4<45 tells AutoCAD to locate a point that is four units away from
the current location and at an angle of 45 degrees from the horizontal.
ABSOLUTE COORDINATE
What is Tab sequential format for CNC?
3.4.1 Structure of an NC Part Program
Commands are input into the controller in units called blocks or statements.
Block Format:
1. Fixed sequential format
2. Tab sequential format
3. Word address format
EXAMPLE:
Assume that a drilling operation is to be programmed as:
1. The tool is positioned at (25.4,12.5,0) by a rapid movement.
2. The tool is then advanced -10 mm in the z direction at a feed rate of 500 mm/min., with the
flood coolant on.
3. The is then retracted back 10 mm at the rapid feed rate, and the coolant is turned off.
1. Fixed sequential format
0050 00 +0025400 +0012500 +0000000 0000 00
0060 01 +0025400 +0012500 -0010000 0500 08
0070 00 +0025400 +0012500 +0000000 0000 09
2. Tab sequential format
0050 TAB 00 TAB +0025400 TAB +0012500 TAB +0000000 TAB TAB
0060 TAB 01 TAB TAB TAB -0010000 TAB 0500 TAB 08
0070 TAB 00 TAB TAB TAB -0000000 TAB 0000 TAB 09
3. Word address format
N50 G00 X25400 Y125 Z0 F0
N60 G01 Z-10000 F500 M08
N70 G00 Z0 M09
What is a reprogrammable microcomputer?
A microcomputer is a small, relatively inexpensive computer having a central processing unit (CPU) made out of a microprocessor.[2] The computer also includes memory and input/output (I/O) circuitry together mounted on a printed circuit board (PCB).[3] Microcomputers became popular in the 1970s and 1980s with the advent of increasingly powerful microprocessors. The predecessors to these computers, mainframes and minicomputers, were comparatively much larger and more expensive (though indeed present-day mainframes such as the IBM System z machines use one or more custom microprocessors as their CPUs).
A constant that multiplies a variable?
A constant that multiplies a variable is no longer a constant. By its very definition, a constant is something that can never be different. The result of variable multiplication is thus a variable, not a constant.
I would say that the above answer is not necessarily true. The common equation for the area of a circle is: area = pi * r2
The fact that you are multiplying the mathematical constant pi by a variable does not change the value of pi.
Agree with the second answer. Jsut to add, a constant that multplies a variable is called a coefficient.
Upstream data is data from process units upstream of whatever unit you are concerned with. Usually this includes such properties as temperature, pressure, density, composition, enthalpy, heat capacity, etc.
Does 10BaseT cable need terminators?
Every transmission line requires termination, either in the form of the ultimate load, such as an antenna, or in the form of some kind of resistor. 10BaseT is no different.
However, that termination is usually built in to the device in which the cable is plugged. This is different from older systems, such as ArcNet, where the coax cable requires termination on each of the far ends. This is because the 10BaseT system is a star system rather than a partial ring system, so the termination is not a function of the chosen topology.
The reason termination is required in a transmission line is that every step change in characteristic impedance encountered by the wave front as it propagates through the line results in some kind of reflection back towards the source. These reflections result in distortion, loss of power, even damage to the transmitter or circuit.
To reinforce this understanding, consider the 75 Ohm coax cable typically used in a television distribution system. In the simplest case, you connect a cable from the service entrance to the TV set, and you are properly terminated. If, however, you use a splitter, such as for a TV set and a VCR, you now have three transmission lines, one to the splitter and two from the splitter. Is the RF output of the VCR connected to something? It should be, either to a TV set or to a terminator, otherwise there will be problems due to ringing, interference, ghosting, etc.
The trimmer resistor is a calibration device used to correct (trim) the resistance of some other resistor. An example might be the feedback loop of an op-amp in common mode. If you wanted a gain of two, you might use a resistor divider with a two to one ratio. Resistors have tolerance, however, so the stated value will not be exact. You place a trimmer resistor in series with one of the other resistors, picking the value so that, if the two other resitors were exact, the trimmer is set to midpoint, and that the trimmer's range covers the expected tolerance of the other resistors. Then you calibrate the circuit to the expected gain using the trimmer.
How can your outline help you if you get stuck while drafting?
Your outline helps you see the organizational path that you have already set.
Your outline lets you review your original ideas.
