Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

How to center Plane DMDistance3D on some line/plane? (symmetry)

Hello :-)

Trying to modelize a servo-motor lever, the thickness of the lever is represented with a parameter "thickness", which I can adjust to get a stronger or lighter lever.

The problem is that modifying the thickness, it does not keep the symmetry of the piece (only one side of the lever is adjusted). I found several constraints for 2D/sketches like "symmetry" which helps for drawing, but in the case of a 3D model, they don't apply.

How to keep the symmetry of the lever while playing with the "thickness" parameter?
How to center the distance between the two planes?

initial_thickness.png
1003 x 366 - 27K
final_thickness.png
969 x 344 - 26K
dwg
dwg
servo_lever.dwg
29K

Best Answers

  • Answer ✓

    Check out the command options that give you more control over 3d constraints. For example, you can refer distances to WCS planes:

    : _dmDistance3d
    Select a first entity or specify [Use as/WOrld/BLock/selection options (?)]:wo
    Select reference coordinate system subentity [Origin/X axis/Y axis/Z axis/XY plane/YZ plane/ZX plane]:

    So you could set a distance constraint between one of the lever faces and the ZX-plane equal to "thickness/2".

  • As Scott said, use a DMDISTANCE3D constraint back to the ZX plane. see modified form of your model attached.

    I also find it more flexible to use a Hole component to create the holes. This allows you to use the Block option (a hole component is a type of block) to position the hole using the blocks coordinate system. Particularly useful for when you are trying to position something with a curved surface.

    Regards,
    Jason Bourhill
    BricsCAD V20 Ultimate
    CAD Concepts

Answers

Sign In or Register to comment.
Origami
Origami is the Japanese word for paper folding. ORI means to fold and KAMI means paper and involves the creation of paper forms usually entirely by folding.

Powered by VanillaForums, Designed by Steam