Having trouble moving circles in sketch

[salesMUBBN]

I am experiencing issues when I attempt to place circles on a sketch. I cannot seem to place them freely without them constraining themselves. Today I wanted to move the X position of a circle and got the behavivour shown in my attachments. The first image shows skeych before changing, then editing the x position and finally the result.

Thanks in advance

[jhackney1972]

Please attach your model.  If you do not know how to attach your Fusion 360 model follow these easy steps. Open the model in Fusion 360, select the File menu, then Export and save as a F3D or F3Z file to your hard drive. Then use the Attachments section, of a forum post, to attach it.

[salesMUBBN]

Model attached. Please also note that this happens on all my models.

[davebYYPCU]

Your result is legal in the system.  If you had dimensioned 18 high from plate bottom edge / sketch line, the 18 high will be retained.  

Your current 18 dimension to the origin,  normally good practise, is a radius dimension.

Might help....

[salesMUBBN]

So, how do I move the circle?

This happens when creating bthe circle also. Sometimes I place a circle and I cannot dimension it and it immediately gets constrained. Other times I dimension the height but when I go to dimension distance from side of face I get error that this will over constrain it (even though it is blue and I have not yet fully dimensions it.

[salesMUBBN]

ie. How do I change disatance from end from say 52 to 45?

[jhackney1972 · Accepted solution]

Help me out, which component contains the sketch in question?

[jhackney1972 · Accepted solution]

I found one of the sketches you referenced in your post.  You will notice in the video I show how you have dimensioned to the Origin without any reference to the line you want to circle to follow.  I simply changed the type of dimension, you could add a construction line dimension it to the end of the box and place the circle center on it.  Just keep the rules of geometry in mind.

[salesMUBBN]

Thank you John,

I did not realize what I had done. It seems when I place circles, they seem to jump to points that I do not want and automatically constrain to then. To get around it sometimes I creat the circle off the face then drag it down and create dimensions to place it. Can I turn off some snap or points or something to allow free movement of the circle and my dimensions? I lack understanding what is happening here. Thanks again

[jhackney1972 · Accepted solution]

If you are sketching over top of a busy model, with background components, you will often have trouble avoiding snapping to other objects.  I would suggest holding down the Ctrl key (Windows) while you are dragging a sketch, this will prevent automatic sketch constrains from being applied.  You may also have better luck in isolating the component you are working on to limit the number of background snap points.

In the animated GIF file below, notice how the snapping goes on and off as I drag a sketch circle over the surface.  What I am doing is cycling the holding of my Crtl key.