Understanding Freecad: Solid Modelling vs Surface Modelling – part 1

An introduction based on the examples contained in tutorials 1 – 5.

The work flow in tutorial no 4 and 5 shows how to switching between different workbenches in Freecad 0.17. More; we combine two types of modelling. The solid modelling is supplemented with surface. Separately each of this methods has some restrictions, work with both gives an enormous high flexibility. Division solid and surface comes from differences in the approach to construction and its editing.

First I look into solid modelling. In this method we make a filled inside solid.

The proceeding is as follows:

  • Choose a plan for your sketch which is the base for your solid.

  • Draw the sketch – closed profile and give the dimension to make a fully constrained.

  • Now the sketch is ready to create a solid.

closed profile
Start from closed profile to create a solid.

The very important is to create a closed profile if you are willing to make a solid. The profile it could be made as a sketch in Sketcher or a drawing in Draft. We can edit our profile in Part Design or Part Workbench.  There are several ways to do this.

Below is the brief of  the possibilities of creation:

pad
Extruding is the first basic technique.

In Freecad we can extrude our profile with tool pad in Part Design or extrude tool in Part Workbench. This technique is very simple and has some properties which make it a very useful in many cases.

revolve
With the arrival of new tools in Freecad 0.17 we can create a datum line to revolve our profile which gives many interesting possibilities for shaping solids

To build solids by rotation choose the revolve command in the Part Design or Part panel. This technique is based on the rotation of the profile relative to the axis determined by us. The axis can be one of the profile lines, the axis of the coordinate system and also we can create a completely new axis with the datum line tool as well. Using the datum line we can get very different effects. In the revolve tool options, you can specify the value of the rotation angle – it does not have to be always 360 degrees.

loft
Loft – snapping through two different profiles

Loft technique is based on shaping a solid by a program based on two or more profiles we have arranged. Profiles can be the same or different. In this method, we can also use a line or point to build a solid.

sweep
Sweep – In this case we need one or more profiles and a path.

Now we have our solid – what`s next? The following features are made simmilar by adding next shapes. We have also many other tools to make our model better like pocket, hole, groove,  pattern features, mirror, fillet, chamfer and other.

features

 

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One thought on “Understanding Freecad: Solid Modelling vs Surface Modelling – part 1

  1. FreeCAD exports all settings
    All the settings of FreeCAD, all in the FreeCAD folder.

    C:\Users\a←When installing the operating system, the name entered.\AppData←File Manager ~ “Hidden project” to open, the AppData folder will be displayed.\Roaming\FreeCAD

    Back up the FreeCAD folder, when reinstalling, put the FreeCAD folder in its original place.

    Note: To clear all settings, just delete the FreeCAD folder, then open the program, a new FreeCAD folder will be created.

    FreeCAD exports toolbars and macros I made
    Common path
    C:\Users\a←When installing the operating system, the name entered.\AppData←File Manager ~ “Hidden project” to open, the AppData folder will be displayed.\Roaming\FreeCAD\Please take the branch path below.

    Branch path
    \FreeCAD\user.cfg←The “toolbar” I made is placed here.

    \FreeCAD\Macro←The “Macro” I made is placed here.

    Back up the file and folder, when reinstalling, put the file and folder in its original place.

    Record settings with screenshots
    In the event that there is no way to export the settings, Record settings with a screenshot, It is the best way.

    For example: Desktop location, toolbar location, and more…

    Record settings with a screenshot, When reinstalling, It will be restored soon.

    The same is true for mobile phones.

    Like

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