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Paul612-Amethyst
12-Amethyst
January 3, 2025
Solved

2D Drawing Axis crosshair orientation.

  • January 3, 2025
  • 1 reply
  • 3501 views

I have a circular part  with a rectangular keyway in the front plane.

I have created an axis in the part normal to the front plane and referencing the right and top planes with 0.0 offsets. This is prior to creating any geometry.

Axis.JPG

In the drawing of the part the axis crosshair is shown in the vertical plane and horizontal plane parallel to the keyway when the view is shown as front.

axis_part.JPG

If I rotate the front view by axis angle 45°, the axis crosshair are no longer shown as referencing the right and top of the part and parallel / perpendicular to the slot.

axis2_part.JPG

Is there a way to have the axis cross hair fixed to the datums in the part, so that when the part is installed in an assembly , the angular dimensions can be called out  depending on the position of the keyway. And if the part is rotated in the drawing the axis stay aligned to the keyway.

 

Any help on this would be greatly appreciated.

Best answer by Paul6

Hi All,

Thanks for your suggestions on how to show a cross hair in a drawing of the axis in a model.

I understand now that what I was hoping to display in a drawing or model, is not the default for creo. 

It appears that I would require additional feature / axis etc in the model, to achieve the desired ability to measure the clocking angle. 

 

1 reply

kdirth
21-Topaz I
kdirth21-Topaz I
21-Topaz I
January 3, 2025

Select axis, RMB, Edit Attachment

 

Menu will pop up to select desired attachment.

There is always more to learn.
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Paul612-AmethystAuthor
12-Amethyst
January 6, 2025

The axis attachment is already aligned to the top and right datum planes in the part..

What are you suggesting should be selected as references? 

This is the view I am wanting when the part is rotated.

axis3_part.JPG

In the drawing I can manually rotate the axis, but that requires knowing the angle the part is rotated.

As the drawing will have multiple views of the parts movement, with variable angles this would not be a suitable solution.

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Paul612-AmethystAuthor
12-Amethyst
January 6, 2025

Hi Ken, thanks for the clarification, however I am still not sure I am getting the result I am wanting.

If I pick the axis and edit attachment, and replace the right datum with the short slot surface, the axis no longer concentric to the cylinder. The crosshair in the drawing when the view is angled at 45°, the cross hair remains in the vertical and horizontal planes.

axis4_part.JPG

If I use the alternative method suggested to create a set of of axises on the front plane and normal to top and right datums, I agree you are able to select the 2 axis in the view to create a virtual / fake cross hair.

Dual axisDual axis

An alternative method would be to create a sketch of a cross hair on the front plane of a cross hair and use that as the fake cross hair.

sketched fake crosshairsketched fake crosshair

 

However what I am wanting to achieve is to have the cross hair of the single axis which is concentric to cylinder and constrained in orientation to the top and right datum planes. So that when you rotate the part in an assembly mechanism the cross hair rotates to indicate the change in position.

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