How to make blue lines black?

[whkiess]

Hi,

Newbie here. I watched a tutorial which advised to ALWAYS make sure all lines are black indicating you have a fully constrained/water tight container. I can't seem to get the blue lines to go black. I believe they are all constrained one way or another, but I don 't know for sure.

Does anyone have any suggestions on how to get the lines black?

Thanks,

Walter

[davebYYPCU]

You need more dimensions, those blue lines can move away from the black outline, 

e.g. The 45 is missing top right vertical, to stop the blue horizontal line moving up or Down,

left click the blue lines, if you can drag them, they need constraint or dimension 

Not sure why all your dimensions have fx in them, using parameters?

[Anonymous]

@whkiess

Add dimensions and constraints that are required to fully constrain the geometry.

"....I believe they are all constrained one way or another..."

No.

Fully constrained means: position of geometry is defined by dimensions or constraints in such a way that it cannot move any more.

Try to click-and-drag the blue geometry. It will move. And if you see the movement, you sure will realize what dimensions/constraints are missing.

Manfred

uuups...Dave was faster than me

[whkiess]

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@davebYYPCU wrote:

left click the blue lines, if you can drag them, they need constraint or dimension 

Not sure why all your dimensions have fx in them, using parameters?

---

Thanks, Dave. I'll check this out. Yes, I am using dimensions, that's why some lines don't have dimensions written on them. I originally drew a rectangle, then added construction lines to help draw the inner (blue) lines. Once done with the construction lines, I trimmed the drawn lines and deleted the construction lines. This is what's left.

[Anonymous · Accepted solution]

@whkiess

No need to use construction lines (they are useful for different things) and trimming.

As a lazy guy, I like it simple and easy. This would be my workflow:

1) I sketch the geometry roughly in the required shape and position, I don`t care to enter exact length values.

2) then I add and edit dimensions to match the desired values, step by step

3) I do that until it is fully constrained - if necessary, I also add geometric constraints (not in this case, because Fusion added the constraints that I wanted automatically)

Done!

[whkiess]

Thanks for your detailed explanation/example. That really helps! I hadn't considered doing it that way, hence I started with a rectangle of outer dimensions and chipped away at it until it was the right shape. There's a lesson in that - thanks!

After moving the blue lines to see why, I ended up constraining them by giving them their proper dimensions, mostly parameters to allow for scaling if ever I wanted to and as an exercise in parametric design. This is the result, all black lines - Yay! Now to add the wall pin and start extruding and filleting...

Now, even though Dave was the 1st responder, I found Manfred's answer best as it was more detailed. I appreciate both, but can only give the best answer to one, so Manfred wins this time.

Thanks again to both of you for your help.