For week3 we were asked to use try new 2d and 3d modeling software i want to explore more about parametric so i  tried freecad for parametric design but i don't like its interface and it take lot more time and effort so i stop and start using back fusion 360

 

About freecad

FreeCAD is a parametric 3D modeler made primarily to design real-life objects of any size. Parametric modeling allows you to easily modify your design by going back into your model history and changing its parameters. FreeCAD is open-source and highly customizable, scriptable and extensible.

 

things which i like about this software

1 it is free and have open source source files for any python programmer can work in its workbench with programing

  commands

2 on start screen you can find all necessary things to learn about freecad

 

things which i don't like about this

1 for downloading there latest version you have to go at there github link not avaliable on official site

when you are making any  in freecad if

 

excersise 1

obective : making comb parametric design in freecad for testing pressfit

things i explored in freecad

1 making sketch ( i made one comb for checking testing press fit )

2 assigning dimension parameter using spreadsheet

3 exporting file to dxf format

Downloading freecad

latest version freecad 0.17 is not available on there official site so you need to download that from there github link

freecad download link

or search download freecad0.17 in google

files available are in 7zip format so you need extractor for which you can download from below link

7zip extractor

for installation go to bin folder >run application.exe file

this is the first window which you get when you open your software click on the file menu to create new file

 on this screen you can find all necessary things to learn about freecad now go to file menu and click on the file menu and create new file

opening sketch bench

step 1- in top you will find start menu click on this and change this to sketch you will directly come at sketch workbench click on create new

step 2 - select plane of sketch

step 3- create sketch using above tools

design1

design 2 this is my final design

Assigning parameters using spreadsheet data for parametric designing

on the bar where you select sketcher select spreadsheet and create new spreadsheet , write some parameters as thickness

"thick" , side length as "side" and write values of each parameter in front of it

here you can see you have to click on properties and go to alies option in properties to name that particular value

AS i select the dimension to assign them value to different parameter