Bogu7 wrote: ↑
Fri Jun 14, 2019 3:15 pm
It is the easiest thing in the world to do with librecad and friends, but I guess I simply do not understand what constraints are and how to make the dimensions what I want.
Bogu7 wrote: ↑
Fri Jun 14, 2019 4:10 pm
I am used to cad programs where I can select, drag, snap to grid, maybe even count a little bit, and boom I get what I want. But here I am, lost, believing that "constraints" are somehow what I am supposed to be using, but not even understanding what that means.
Constraints are the things we use in a Sketch to define lengths / relationships (parallelism, perpendicularity, tangency, equality, symmetry, and more) of / between the edges in a Sketch. We can create geometry inside a Sketch, and we can use Snapping while creating the geometry, but that geometry isn't truly defined just because the cursor snapped to the grid (or maybe the cursor snapped to something else) while we created the geometry. To properly define Sketch geometry we use Constraints.
I also wholeheartedly recommend that you read chrisb's Sketcher tutorial. While replying to your post I looked back through your other two topics, and will mention that I experienced similar difficulties trying to grasp the work flow while learning FreeCAD. After I had gained some reasonable level of proficiency I put some video tutorials on YouTube. FreeCAD (and pertinently the Part Design WB) has since evolved, while the video content has remained unchanged, so the videos have become obsolete. But even so, I think it will be helpful for you to watch them; the playlist is here:
https://www.youtube.com/playlist?list=P ... KAnEjJGe8q
The Part Design work flow is now significantly different, but the Sketcher concepts and work flow are largely the same. My suggestion is that you simply watch them to get a better understanding of how we use Constraints, and (because the Part Design work flow has since changed) that you do not try to follow along step-by-step. I think that if you simply watch the videos, then read chrisb's tutorial, using Sketcher and Part Design won't be so unclear for you.
Regardless of whatever advice you follow don't hesitate to post back if you might need more help, or if something is still confusing or unclear.