Isometric- will fail exam if I cant sort this!!

[kpot123]

Hi there, Im new to this site!
I am doing city and guilds 2d autocad, and have seen that the last exam question is an isometric drawing. I have to draw the plan view of a shape .... from the dimensions given (radius and line lengths). Then draw it in isometric. I can draw the straight lines in iso mode but I am struggling with the curved edges?! Is it isocircles i need to use?? Because ive tried and they dont seem to be at the right angle ?? Im stressing over this big time...its sooo frustrating!!!!

Cheers, Kate

[ReMark]

Isocircles would make sense. And yes, they tend to appear "off" but that's why they're isocircles and not plain circles.

[kpot123]

I know theyr not plain circles, that looks even stranger lol!! but they are not the same as on the drawing. im soooo not getting anywhere with it!!! cheers anyway though xx

[ReMark]

In what way are they "not the same"?

[kpot123]

they seem to be smaller and narrower than the exam paper. i cant really explain on here...i just dont know how to do radius' in isometric ! xx

[ReMark]

The radius, by default, or the diameter can be specified on the command line by typing in the appropriate value. What units are you working in?

[kpot123]

working in millimetres. i have tried the isocircles by typing the radius etc. maybe im using the wrong start points etc. i just dont have a clue! any1 know of any good websites or anything? Xx

[JerryG]

Try the Ellipse command in the plane you need to be in.

[kpot123]

tried it!! perhaps i shouldnt have posted on here.....im a complete novice at isometric...i dont really understand it at all!! xxx

[ReMark]

The "start point" is always the center of the circle because AutoCAD wants to default to the radius of the circle as the expected input. Try not to get too excited.

As long as you know the radius you want to use you can determine where to start your ellipse (isocircle) relative to any other lines in your drawing.