Isometric Dimensions in AutoCAD
This AutoCAD tutorial explains the process of correctly applying dimensions to drawings created in isometric mode [00:00]. Standard dimensions are perpendicular to the object and do not align with the 30-degree isometric axes. The video demonstrates using the Oblique dimension command (found under the Annotate tab) to skew the dimension lines so they align with the drawing's isometric planes [00:28]. The instructor shows that the three correct oblique angles to use are 30, 90, or -30 degrees [03:00]. The video concludes by noting that dimensioning the isometric view is usually done only for clarity or instructional purposes, as the multi-view drawings are the proper place for formal dimensions [03:14].
Video Chapters
[00:00] Problem: Standard dimensions are perpendicular, not isometric
[00:28] Solution: Using the Oblique dimension command
[00:49] Applying the Oblique angle of 30 degrees to align the dimension
[02:43] Determining the three correct Oblique angles (30, 90, -30)
[03:14] The role of isometric dimensions (clarity) vs. multi-view dimensions (standard)