CADcaster

I have posted a couple tutorial how to draw isometric drawing and dimensions. If you look at the dimension closer, there’s something not right. The dimension arrow is still use the default arrow, which is not isometric at all.

In this post, we will create a new dimension arrow to fixed this. You can use this technique to create your own dimension arrow later. But now, we just use it for isometric dimension.

First, you have to create a drawing, how you want your arrow look like. I create something like this. Make a dimension arrow pointing to right. You may want to use ellipse or something else. You can also use lines, arc, hatch pattern, etc. But let’s create something easy first.

Three things you can use as a guide when you draw it:

1. Use angle about 30deg, because it is the default angle for isometric drawing in AutoCAD.
2. Draw a dimension using existing arrow. Refer to the existing arrow for your arrow size.
3. Now related to #2, check your dimension style. You have to create the dimension arrow as large as size 1. If you have your arrow size 100 in your dimension style, then resize your arrow you created to 1/100.

Create it as a block. Make sure your insertion point is at the arrow tip.

Now open dimension style dialog box. Modify your isometric dimension style, in symbols and arrows tab, change your first and second arrow heads to user arrow. Then select your block.

Check your drawing now.

Looks better. But there is something still not right. Take a look at dimension showing 700 value. It’s not supposed to look that way. How to fix that?

Well, there is no other way. You have to create another dimension style for it. Want to try it by yourself?

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Source: CAD Notes – Isometric Dimension Arrow
Go to Source: CAD Notes