I usually use Rhinoceros 3d software to make my 3D models.
However in Rhinoceros there is no tool that allows to make a parametric drawing, where you define the measurements and if they are coincident, parallel, have the same value or you can change the value of the dimension of the shape without having to re-draw.
In order to make a parametric selection in rhinoceros it is necessary to install the Grasshopper that is a graphical algorithm tightly integrated with Rhino's 3-D modeling tools.
The installation is free and you can find out more from the site:
I installed the grasshopper and saw some tutorials to figure out how it works. However I did not like the way the program worked, I was not used to it and found it difficult.
So I gave up on this program, and started using fusion360.
Fusion 360 is the name 123design, and works from the same principle as solidWorks.
Find out more about fusion360:
Since the drawing I wanted to make was a box, it was easy to start on a new program.
I started by doing a sketch without measures of the sides of the box that wanted to cut in the laser.
I drew the side grooves of the box, making a rectangle and corendo with the trim tool, the edge that I did not want. So I built a kind of "teeth" on the side of the box.
Then I went to "modify" and clicked on "change parameters" that opens a box where it allows me to define the measurements I want to use a parameter, which can be changed.
I added the cut depth that matches the thickness of the material
And the cut size that correpsonde to the size of the flaps of the fittings.
Then go to the sketch and define the dimensions of the drawing, with the parametric measurement we defined above.
I repeated the same process to the 5 sides of the box, and then I exported the sketch to vector, .dxf and .ai format