Having problem using Inventor. Purple lines

[257979FNMFQ]

Hello everyone. I'm having huge complications with Inventor. I've been using ''CATIA'' for a long time and now I'm using Inventor. Why are all my lines purple instead of black??? I know that a sketch must have all the distances dimensioned using dimensions. But when I used a dimension to get the lines black, they are still purple. Why? I don't know how to use geometric ties. Could that be a problem? Please help...

Thank you all for your help and support!
PS: I am sending a picture of my script too, so be sure to check it out! 🙂

[Frederick_Law]

Drag the lines and see if they move.

Check your color setting to see what they mean, my guess is "Under Constrain":

[Gabriel_Watson]

You are probably missing constraints for the midpoints of either end. Inventor needs a combination of dimensioning and constraints (point to point, tangent, etc.) to fully define/fixate all sketch lines without leaving spare degrees of freedom (DoF).

To check which DoFs are left, use the bottom status bar button while in sketch mode/environment.

[Ray_Feiler]

If the horizontal line is a projection of the x axis, make sure your center line has a collinear constraint.

If the final part is going to be revolved around the center line, then you only need to draw the upper half.

[Ray_Feiler]

Something like this.

[Anonymous]

@257979FNMFQ - First, Welcome to the boards.

Do yourself a huge favor and first, reach a hand around to the back of your head and press the reset button.

You are no longer using Catia and you must, must forget how you did things in Catia. Trust me, the more you fight it and or attempt to make Inventor work like another CAD program, the more frustrated you'll get. I came from being a Power User level on CADDS5i to Inventor release 2, a huge change.

Next, take the time and work through the on-board tutorials, even the basic ones, especially the basic ones. Build a solid foundation of the basic and the rest will come much easier.

Go to the Tools tab on your ribbon menu and select the "Tutorial Gallery"

If such is not shown, right click an empty area of the ribbon menu and select the panel(s) you want shown. Hint: do the same but de-select those commands that you know you will not be using. This will un-clutter your menu with commands you don't need. For example: We don't do any Mold Design, so why have such on the menus?

The tutorials will walk you through numerous different tasks from novice to expert. YouTube has some great content as well, you'll even see some of us on there (I have a ton of vids I still need to post there...if I ever get the time).

And of course, feel free to ask questions here. There's a ton of great posters here that are more than willing to help.

[IST-WK]

^This.

Also, sketch entities should be constrained via dimensions to either a plane or an axis in two directions to make them "fully constrained" in Inventor.  Additional constraints such as parallel, perpendicular, tangent, colinear, etc. can all have an effect on whether or not the sketch is fully constrained.

[johnsonshiue]

Hi! Do you have overlapped lines on top of one another? Try enabling Degree of Freedom display (right-click -> Show All Degrees of Freedom). Is the display reasonable?

Many thanks!

[yahyayaksiz]

if your lines havent fully constrait, inventor doing your lines purple color. you can open show degree of freedom and see which lines havent fully constraited or look at screen's right bottom.