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Basics of CADquery Python Module | FreeCAD Python | Python Programming|
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Jul 2, 2025
#FreeCAD #FreePython #freecadtutorial In this Tutorial I have Explain Basics of CADquery Python Module to create high quality 3D parametric models with CADquery Workbench. ▶️ Get my Complete FreeCAD Course : From Zero to Expert ! https://ko-fi.com/s/1ab4385434 ▶️ Join my channel membership and keep supporting my work: https://www.youtube.com/channel/UCcn6z2whMaFu-_LDsEXCfVA/join ▶️ Visit my website for more info on FreeCAD-: https://mechnexus.com/ ▶️ Download Source File of Tutorial-: https://mechnexus.com/mechnexus-youtube-tutorial-source-file/ ▶️ Buy Me a Coffee I am very grateful that you watch my videos and I am constantly trying to improve the quality of the videos on this channel. If you'd like to help me do this, please consider supporting me so that I can to continue to produce content for your enjoyment. 👉 Help support this channel by buying me a coffee: https://ko-fi.com/mechnexus
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0:00
Hello friends welcome to Free cat
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tutorial and in this tutorial we will
0:03
learn about the cad query workbench
0:06
which is a python based modules to
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create the high quality 3D models so
0:11
here I have already installed the
0:13
cadquery workbench
0:15
and once you install the category
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workbench and activate it you will get
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here the cat query Tab and you will see
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here multiple options like new script
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open script execute script with the help
0:29
with keyboard shortcut so installing
0:31
this category workbench is very easy
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just head over to the tool then add-on
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manager
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and search for the cat query here and
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install it
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so here is the module and install and
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activate it and restart your free CAD
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so what is this CAD query and what it is
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used we will officially see its give
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GitHub page so basically category is a
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python module for building 3D models and
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using this tool or is using this
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workbench you can write simple script to
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produce high quality models and you can
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visit this GitHub page to get the more
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information about the category workbench
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so in this tutorial we are not going to
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write any custom code
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instead of that we will see some
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standard
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script which comes with the category
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workbench so here is the option called
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open script and if I see here there are
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the main script has been already written
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and which you can use as per your
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requirement so for example I wanted to
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create a simple plate
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so I will
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use this script called Simple block and
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I will say okay
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and if you see deep into the code we can
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see that our first line of a command is
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a import category as CQ this means that
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with the help of this command we are
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importing the cat query Library
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and here
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we are creating a simple plate so we
2:20
have defined the length height and
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thickness
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and here if we see that uh CQ means get
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query and work plane is a x y
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and here we have called that the length
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height and thickness
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which we have defined here and here is a
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show result so this is the code
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written in a python now we will execute
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it to execute the code go to the
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category Tab and say execute script
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so once you execute the script that
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simple block has a part has been made in
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a free cat now I will say Zoom to fit I
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can say isometric so it has model me
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apart with length height and thickness
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and now if I change anything here for
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example I wanted to
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thickness of 2 mm
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so I will go here and use the 2mm and
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length I want
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100
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and width i150
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and I will go and say execute a script
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so you can see that
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parts has been modified
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and if I go here and if I want only one
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mm thickness
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then I will go here and then say execute
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a script
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so you can see that it has been modified
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to 1mm and if I wanted to make a 10 mm
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thickness then I can do the same
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so this is the 10 mm
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so this is how we can
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easily make a simple models
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with the help of
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a change in a code and basically we have
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just changed the value
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and now if we go to the open script then
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we can see the many examples here which
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you you can use
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as per your requirement
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now we will go to the model here which
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we have created here
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now if I wanted to give the chamfer to
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all these edges or fill it to all these
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edges and if I select
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these edges
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all four edges
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and I switched to the part design
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workbench
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and if I say fill it so what
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error we are getting that create a body
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so this means that this is just a shape
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it is not a body
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but still we can use this shapes to
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modify our part
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so the basic idea is that I will create
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a body here and then I will select this
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shape which we have created with the
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with the help of this python script now
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we will drop it over the body now you
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can see that this has been
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comma as the base features and now if I
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try to fill it this edges
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I can fill it it
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and I will say okay now I can save this
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part
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get query as R2
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and now
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if I close this
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all the windows and now I will open my
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part
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here now this this having no any
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dependency with the cad query now it is
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a independent model now I can do
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whatever I can do with this part
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so you can see that the shape
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and now this we have imported a base
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card now we will see some other quotes
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of the cat query
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now I will go to the open script
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now here I will say uh block with board
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Center hole
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I will say okay
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and here we can see that it is a plate
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length height sensor thickness Center
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Dia 22 and
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it is made on a x y plane length height
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and thickness
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now we will execute this code and we
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will see what happens
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so once we have executed the code we
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have got our model here
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so this is the whole
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which we can see here
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we can see here the 80 60 10 and whole
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diet 22
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and for example I wanted to change this
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whole dial
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from 20 to
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10.
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and I will say execute script
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so you can see that holder has been
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shorter
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similarly I can change length height and
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thickness thickness suppose that I want
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to cube 2mm
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so you can see that it has been
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changed now same way as we have did in
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our last
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part we can go to the part design
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workbench and create a body and we can
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use this shape inside the body and now
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we can do anything either we want I want
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to adapt the whole affiliate chamfer
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whatever with this part
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so this category workbench is very time
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saving to create the simple Parts in
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fact if we visit to the
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category Library we can also see some
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complex example of the script
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for example
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block with counter bore holes
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now I will close this one
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and I will execute the script
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and I will say Zoom to fit
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so now you can see that
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now it is a plate with a four countable
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holes and one hole at the center
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and understanding the category code is a
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very simple because it is a very simple
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script so here is the length Heights and
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thickness whole die a whole
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Contour board hold Ayah
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depth
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and here is a plane
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and here is the positions length
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length and height
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so let's see the an example of uh
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changing the plane
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so if I say
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if I on my plane here
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sorry it is a shape so
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I will go here and say
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why is it
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and I will execute the script
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so the part is failing
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okay so you have to Deep dive into the
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code and now if you are changing the
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work planes here then you have to uh
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change this one with respect to
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ZX
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but I am not going into the depth of
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this
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once you start making some simple script
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or simple part with the help of a query
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then you will understand that how to
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play with the code
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and now we will see some more example
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now we will move to the open script
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now here we can see one example of the
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this bottle and I will say okay
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so we can see that here is a
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set of the length height and thickness
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and now we will simply execute it
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so you can see that a bottle has been
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made
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but you have to Deep dive into the code
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if you are not to change anything on the
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code but if you are not to make any
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similar models
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then you can just simply run the query
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and you can just create a shape and then
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go to the part design workbench and
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create a body and
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and now you can do anything with this
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part
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so this category workbench is very time
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saving
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with the help of this ready-made script
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here
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and when you study all this script when
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you run this script in a free CAD you
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will get the more idea about it
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so this is all about this tutorial and
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how to use the cat query python models
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to create a simple 3D models in fact the
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complex model also if we are good in a
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programming then you can play with this
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cat queries
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workbench
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so this is all about this tutorial I
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hope you have liked this tutorial and if
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you like my method of teaching then you
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can support me
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please visit the video description links
13:18
I will come with more useful tutorial on
13:21
a free cat thank you for watching and
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thank you for your valuable time