1.2----- mechanical design tools (CAD software) and hardware design tools (EDA software) and comparison

If you make it from scratch , We must design the structure and circuit ！CAD No AutoCAD, there CAD It means Computer Aided Design, It's computer aided design .

CAD Software ：

The three-dimensional , There are four mainstream ：SolidWorks（ Non standard design industry ）,Creo( Formerly called Preo, Home appliance and communication industry ),UG（ The mould , Processing industry ）,Catia（ automobile , aviation , A ship ）.

Two dimensional general use AutoCAD（ The machinery industry must learn ）, It can also be made in China, for example CAXA.

Let's talk about these software in detail ：

The three dimensional ：

Catia： Dassault of France , Commonly used in cars 、 Aviation and other industries , Especially, it is widely used by designers . Not much about spaceflight , Its prosperous industry , Various curved surface designs for automobiles are CATIA The advantages of , The large-scale assembly in the shipbuilding industry is CATIA The advantages of . Its disadvantage is that it is not very convenient to use , Interaction is troublesome , The interface is like the products of the last century .

UG： Siemens AG ,UG Modeling for blending , It can be taught with or without participation , Since it was acquired by Siemens, it has been renamed NX, at present NX Mainly in mold design , It is widely used in processing and other fields .

Creo： The United States PTC The company's ,Creo yes Preo Upgraded version ,Preo To 5.0 It will not be updated later , Now the latest is Creo, Home appliance 、 Digital 、 Communication electronics 、 Daily necessities and many other industries , Most engineers use this design software （ Because the software has a powerful ability to surface , However, there are many curved surfaces in the structural design of product development , therefore 3C Product development structure design is basically Creo）, The structural design of the mobile phone industry generally uses Creo. This software is suitable for rigorous product structure design , Its surface modeling is also more convenient , This software performs very well , Even if the computer configuration is not very good , And it runs smoothly .

SolidWorks： French Dassault , This software is used to attack the United States PTC The company's Creo,Solidworks The founder of is from PTC The company left , It was later acquired by Dassault . This software is very good at ease of use , Part drawing 、 Assembly drawings 、 Two dimensional engineering drawings are very convenient , The operation is very grounded , It is deeply loved by mechanical designers . Although it is low-end , But many people use it , Because it is easy to learn , Relatively cheap , Functions are also expanding , Now the market share is increasing year by year . Many colleges and universities have three software design courses , Also began to teach the use of this software , And in the non-standard design industry ,SolidWorks It's a perfect ride . If you are new to mechanical design , It is recommended to learn this software thoroughly ！ And there are many software tutorials , It's easy to find information . Even if you learn other software , It's also very fast . The software uninstallation is not clean , There will be all kinds of inexplicable errors in reinstallation , Basically, the system needs to be reinstalled in every version （PS：Solidworks How to uninstall clean ？）, And the performance of this software is not very good , The computer configuration should be higher , It is too laggy. .

A two-dimensional ：

AutoCAD： The United States Autodesk The company's , The two-dimensional function is widely used , Applied to all walks of life , It's the technicians Must learn One of the drawing software . This is mainly used for engineering drawing , 3D software can also produce engineering drawings ,SolidWorks The engineering drawing module of can basically replace AutoCAD 了 （ Personal view ）, But this is still a must .

Many people will struggle to learn that software , Look for comparisons , In fact, the basic functions of the above three-dimensional software are almost the same , It's just the difference between the industry habits and the industry itself , As a result, different industries use different software . But for beginners or beginners , We are trying to master a 3D design software , Experience and feel the connotation of mechanical structure design , The best thing to do is to choose one with rich information , The easier , The software that can meet the requirements is good . that , Just choose Solidworks Just fine . I learned a lot later , If you need other software , It's very fast to learn again , Many things are interlinked .

Dajiang education is a good article , You can have a look if you are interested ： Introduction to machinery ｜ Those look great X Mechanical structure of , How it was designed ？ - You know

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EDA Software ：

EDA： Electronic design automation （ English ：Electronic design automation）

Mainstream EDA There are three main types of software ：Altium Designer、PADS、Cadence.

Altum Designer（ abbreviation AD）： The previous version was protel 99se,protel DXP, The usage is similar , Very suitable for beginners ,3D Render best , This software is also taught in schools , This software is used by many people , There are also many materials and teaching videos . however , Many companies do not use this software , Because if you use it to draw multi-layer boards , The computer is too laggy. , And if there are many people in the company , May receive Altium The lawyer's letter , Suitable for small-scale PCB.

PADS： The previous version was power PCB, Divided into three components ：logic（ Schematic diagram ）、layout（ Layout and setup rules ）、route（ wiring ）, The most distinctive feature is ： Use polar coordinates to place components and auto route （ There is no such thing as automatic wiring AD So bad ）. It is suitable for small and medium-sized PCB, however logic It's not easy to use , So some people use orcad+PADS To make up for this shortcoming . It is suitable for small and medium-sized PCB.

Cadence（ Also called SPB）： It is a system level suite , In addition to drawing schematic diagrams 、PCB outside , You can also draw layout 、 Analog circuits 、 Simulation SI/PI etc. .Cadence The company acquired orcad, At present, the principle diagram is drawn with capture（ Also called orcad）, draw PCB Yes, it is allegro, The simulation circuit is pspice（ from capture From inside ）, Simulation SI/PI Yes. Sigrity（ Additional installation required ）. use capture It's great to draw schematic diagrams , such as , Draw a schematic Library of the chip , You can use it. excel Write well （ Pin number and partial pin name , image D0~D7, Drag the mouse and it will come out ）, then copy To capture Inside , Just make a few more adjustments . But with allegro Painting and packaging are more cumbersome , It is necessary to draw the pad in advance , Before you can draw a package . It is applicable to medium and large-scale PCB.

Here is another example of domestic production EDA Software , Lichuang EDA, It is an online product independently developed by Shenzhen jialichuang company EDA Tools , Because the library can be adjusted online , Jialichuang's Lichuang mall also sells components , You can also proofing PCB, So use Lichuang EDA It will be especially convenient . There is also an open source EDA Software is called KiCAD EDA, Because of software copyright , There are many developers who use this software , And the software itself supports Chinese , If you have a foundation , Learning is also fast .

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I choose the following two software here , Start the project of rear balance car ：

1.solidworks 2018 SP5.0   (SP5.0 yes 2018 A perfect version of version )：cad,ps,3dmax,proe,Solidworks,sketchup,Revit, Tianzheng software download - CAD Self study network

2. Lichuang EDA（ domestic ）： Domestic Lichuang EDA - A circuit board development platform customized for Chinese people

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      Solidworks It is used to design structures , Nowadays, it is widely used in the mechanical design industry , On the one hand, for individuals , This software is easy to use , It's easy to learn , Many operations are simple and easy to use . This creates a positive feedback , The more people who are easy to use , More materials and teaching videos , The more beginners start this software , So there are more and more people and industries . On the other hand , For businesses , This software is comparatively cheap , Forced by the demand of genuine , Many enterprises will also purchase this software . The link above the software installation process also contains , I won't repeat it here .

       Lichuang EDA, To design PCB Of , That is, the circuit board . The process is ： Draw... First Schematic Library ,PCB library , Then, on the basis of the schematic library, the connection relationship of components is expressed , That is, painting Schematic diagram , Then use the schematic diagram to generate PCB chart . Lichuang EDA It's online , Register an account and you can use .