Frustrating rotate behavior

dshaffer

Hi -

I have created a model of a house that has non-orthogonal angles in the plan view (37 degrees, 23 degrees, etc.) and none of them align with true north. I've been using the Axes tool extensively to do this. However, I have discovered that the entire house model needs to be rotated slightly to be precisely positioned relative to my CAD drawings.

I have grouped the entire house, turned on all layers, unhidden everything. One of the elements of the plan (and model) is a 30' x 17' rectangle. I am attempting to use this geometry to rotate the entire group by placing one corner of the rectangle at the intersection of two guides (that are on the correct orientation), then using the Rotate tool. Here's what happens:

click on Rotate tool
click on corner of rectangle in model (rotate tool is blue indicating rotation about z axis)
click on another corner of rectangular geometry to begin rotation
click on guide to align to correct orientation

BUT it doesn't. When I zoom in, the corner of the rectangle that I originally selected is no longer on the intersection of the two guides. It jumps off by only a very tiny amount (+/- 1/8") but it's enough to screw things up. When I move the group back to the guide intersection, I can see that the whole model is still rotated slightly off of the guide.

I've tried turning off the "length" snap, but that doesn't seem to do anything. And I am certain that the two guides are in the correct plane.

This feels like it's happening because of the size of the model and the fact that it's not on the "world" axes, but I'm not sure.

Any thoughts?

Thanks

Wo3Dan

My current settings are:
Length snapping on (0.100000mm) / precision 0.000000mm
Angle snapping at 15 degrees / precision 0.0
(just FYI)

Your procedure seems to be correct.
Sometimes you need to rotate way out of line and redo the rotation to get it "spot on".
Why/when? If you failed the first time and got is almost correct. Then you cannot rotate that last little correction. Maybe this is what happened in your situation.

Same thing can happen with moving geometry in certain occasions.

p.s. have you checked the drawing axes orientation and their origin compared to the systems axes and origin?