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What Drawing This Is?

Printed From: CAD Forum
Category: EN
Forum Name: AutoCAD
Forum Description: Discussion about AutoCAD and AutoCAD LT, viewers, DWG and DXF formats, Design Review, AutoCAD web, Drive, add-ons
URL: https://www.cadforum.cz/forum_en/forum_posts.asp?TID=14778
Printed Date: 22.Jun.2026 at 14:29


Topic: What Drawing This Is?
Posted By: teknol
Subject: What Drawing This Is?
Date Posted: 01.May.2026 at 18:45
Can anyone tell me please what drawing is this, what it's used for, and how to make and use it in Autocad? Thanks.


Replies:
Posted By: philippe JOSEPH
Date Posted: 05.May.2026 at 07:06
Hello teknol, were did you find this drawing ?
This drawing doesn't include the necessary dimensions to draw it on AutoCAD.

Posted By: simutecra
Date Posted: 05.May.2026 at 09:54
This is a geometric construction / engineering drawing, specifically it looks like a descriptive geometry layout used to define relationships between shapes (likely a circle inside a rotated square/diamond with projection lines). You’ll often see this in:
  • Engineering graphics / technical drawing courses
  • Layout planning for parts or patterns
  • Understanding projections (VP = Vertical Plane, etc.)

What it’s used for

It’s mainly used to:

  • Show true shapes and relationships between objects
  • Help visualize projections and intersections
  • Guide precise construction before creating a final CAD model

How to make it in AutoCAD

You don’t draw this as a single command, it’s built step by step:

  1. Start with construction lines (XLINE or LINE) for center axes
  2. Draw the main circle (CIRCLE) from the center
  3. Create the outer rotated square (diamond) using POLYGON (4 sides) or lines + rotation
  4. Use OFFSET for parallel lines
  5. Use TRIM / EXTEND to clean intersections
  6. Add construction arcs/circles to find key points
  7. Use layers or linetypes (dashed) for hidden/construction geometry

How it’s “used” in practice

In real CAD work, this type of drawing is more of a planning/understanding tool rather than something you deliver. Once you understand the geometry, you’d typically:

  • Recreate it as a clean 2D drawing, or
  • Convert it into a 3D model (extrude, revolve, etc.)


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Simutecra


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