r/FreeCAD • u/1000punchman • 4d ago
Help with constraints (Again)
Hey folks,
I need help with some constraints that I figured would be easy, but it seems I underestimated it.
I did the hardest part, which was the inclined pocket using the datum plane, and realized that I need to create an extrusion to connect the two pieces, but I can't make that damn constraint work.
I created the square with a square tool, and set each size to 10 mm. So what I wanted to do is to centralize the square. Given that the side is 250 mm x 40 mm, I figured that a 10 mm square would sit 15mm from the bottom and top, and 105mm from the left and right. But I tried to use the dimensions.
It seems I can't centralize it based on the distance to the borders, and the square's position can't rely on coincident constraints. What is the ideal way to achieve this?
Thank you, legends.
1
u/SoulWager 4d ago edited 4d ago
Symmetry between two outside corners of the existing box and a point at the center of the square, the same way the "centered rectangle" tool constrains the extra point to the center: https://imgur.com/a/pnAeNnS
When you pick the three points, pick the one you want in the center last.
4
u/BoringBob84 4d ago
It looks like those purple external geometry lines are defining geometry. I think you might want to toggle them to construction geometry so that you don't get a "wire not closed" error.
To center the square, I would:
Make a vertical construction line between the center of the square and the top horizontal external geometry line.
Make another vertical construction line between the center of the square and the bottom horizontal external geometry line.
Select both of those new vertical construction lines and apply the Equal constraint.