Post by jj66 on Jun 19, 2023 17:03:27 GMT -5
I start this thread to teach how to draw in 3D a simple piece with Freecad software. I use freecad 0.20.2 and I will draw a rim and tire for Chaparral 2K at 1:25 scale, dimensions in mm.
First of all basic concepts in a 3D design: always you need to know in wich plane you are working (xy, xz, yz). In Freecad there are three basic workbenches: sketcher (where you draw), part (where you apply transformations to your sketches and parts already created), part design (where you draw designs in sketches, create bodys and apply other transformations to your parts (revolutions, polar patterns, linear patterns and much more)
Starting with Chaparral 2K rim, in the part design, body, sketcher workbench, drawing the main section of the rim
Applying revolution tool in the workbench part design workbench and the basic shape of the rim is created.
Now we need a jig to cut the holes on the rim. Created a plate in the part design, body, sketcher workbench, and drawing one hole. Struded it and applying a polar transformation (3 occurences in 360ยบ) and the jig was created.
Cut the rim with the jig in the part workbench.
Now we need another plate to complete the rim, created with a sketch in the sketcher workbench and strude it. To finish the rim, join the rim and the new plate with union tool at the part workbench.
The tire is a two step job: first draw tire section in the part design, body, sketch workbench and then apply a revolution.
The nut is a three plates obtained struding in the part workbench three sketches drawn in the sketch workbench and joined them with the union tool in the part workbench. One of the plates has a edge filleted with the fillet tool in the part workbench.
Once the parts are created, you can export together or separately to a .stl file for printing.
First of all basic concepts in a 3D design: always you need to know in wich plane you are working (xy, xz, yz). In Freecad there are three basic workbenches: sketcher (where you draw), part (where you apply transformations to your sketches and parts already created), part design (where you draw designs in sketches, create bodys and apply other transformations to your parts (revolutions, polar patterns, linear patterns and much more)
Starting with Chaparral 2K rim, in the part design, body, sketcher workbench, drawing the main section of the rim
Applying revolution tool in the workbench part design workbench and the basic shape of the rim is created.
Now we need a jig to cut the holes on the rim. Created a plate in the part design, body, sketcher workbench, and drawing one hole. Struded it and applying a polar transformation (3 occurences in 360ยบ) and the jig was created.
Cut the rim with the jig in the part workbench.
Now we need another plate to complete the rim, created with a sketch in the sketcher workbench and strude it. To finish the rim, join the rim and the new plate with union tool at the part workbench.
The tire is a two step job: first draw tire section in the part design, body, sketch workbench and then apply a revolution.
The nut is a three plates obtained struding in the part workbench three sketches drawn in the sketch workbench and joined them with the union tool in the part workbench. One of the plates has a edge filleted with the fillet tool in the part workbench.
Once the parts are created, you can export together or separately to a .stl file for printing.
