Why the need to constrain with collinear when making a line on X-axis

[deonholt]

Hi and thanks for your help.

I'm following some 2D sketching tutorials.

Is there something in my settings I need to change? Everything was drawn with a line. The blue line at the bottom. I drew it directly on the X-axis. Why is it not attached to the X-axis like the black line of 100mm to the left of it which I started from the origin?

I had to use Collinear constrain with the 100mm to the left.

Thanks.

 

Is there something in my settings I need to change? Everything was drawn with a line. The blue line at the bottom ... I drew it directly on the X-axis. Why is it not attached to the X-axis like the black line of 100mm to the left of it which I started from the origin?

I had to use Collinear constrain with the 100mm to the left.

Thanks.

[SaeedHamza]

simply because the 100 mm line you drew from the origin is coincident from the left to the origin, and since it's horizontal, it's only logical that it's collinear to the X axis.

[deonholt]

Thanks for the reply. I understand that it needs to be collinear but didn't think I have to actually make it collinear with the constraint. I thought that it will be collinear since I am drawing on the X-axis.
Thanks again.

[HughesTooling]

The X axis line is only for visualisation, it is not actual geometry you can snap to but you can force Fusion to project the axis line with the projection tool though. Note this uses the origin not the sketch grid. 

Mark

[deonholt]

Great. Thanks very much for the clarification. I appreciate it very much. I'm always learning.

[g-andresen]

Hi,

In the screencast, I show you how to fully define an initially "wild" sketch.

günther