Autocad Beginer Course

Welcome To Autocad

1. The AutoCAD Workspace

When you first open AutoCAD, the interface might look complex, but it’s built around a few key areas:

• Drawing Area: The large, central space where you create your drawing. This is your digital canvas.

• Command Line: This is your most important tool! It’s at the bottom of the screen. You can type commands here (like LINE, CIRCLE, MOVE) and AutoCAD will respond with prompts. Always keep an eye on the command line.

• Ribbon: The strip across the top containing tabs (Home, Insert, Annotate, etc.) and panels full of tool icons. This is a visual way to access commands.

• Application Menu (The Big Red ‘A’): The button in the top-left corner. Here you can find file operations like New, Open, Save, Print, and Exit.

• Status Bar: The bar at the very bottom. It shows and allows you to toggle important drawing aids like SNAP, GRID, ORTHO, and OSNAP (more on these later).

2. The Fundamental Concept: Co-ordinate System

AutoCAD uses a precise X, Y, Z coordinate system to place everything in space.

• The origin point (0,0) is usually in the lower-left corner of the drawing area.

• To draw a line, you can tell AutoCAD: “Start at point (2,3) and end at point (5,7).” This ensures absolute precision.

There are two main types of coordinates:

• Absolute Coordinates: X,Y (e.g., 5,7 means 5 units over on the X-axis and 7 units up on the Y-axis from the origin (0,0)).

• Relative Coordinates: @X,Y (e.g., @3,4 means “from my last point, go 3 units right and 4 units up”).

3. Your First Essential Commands

You can type these in the command line or click their icons in the Home tab on the Ribbon.

• LINE (L): Draws straight line segments. Type L → press Enter → click a point → click another point → press Enter to finish.

• CIRCLE (C): Draws a circle. The default method is to specify a center point and then a radius.

• RECTANGLE (REC): Draws a rectangle. You simply specify two opposite corners.

• ERASE (E): Deletes objects. Type E → press Enter → select the objects you want to delete → press Enter again.

• SAVE (Ctrl + S): Save your work! Do this early and often.

Pro Tip: Use the Modify commands just as much as the Draw commands. Design is about creating and changing.

• MOVE (M)

• COPY (CO)

• ROTATE (RO)

• TRIM (TR)

4. Crucial Drawing Aids (Status Bar Toggles)

These tools on the status bar make drawing accurately much easier.

• SNAP (F9): Forces your cursor to move in specific increments (e.g., every 1 unit).

• GRID (F7): Displays a grid of dots on the screen for visual reference. It’s like graph paper.

• ORTHO (F8): CRITICAL FOR BEGINNERS. Restricts cursor movement to horizontal and vertical directions only. Turn this on when you need to draw straight lines.

• OSNAP (Object Snap) (F3): The most important aid. This allows you to snap to exact points on existing objects, like:

  • Endpoint: Snaps to the end of a line.

  • Midpoint: Snaps to the middle of a line.

  • Center: Snaps to the center of a circle.

  • Intersection: Snaps where two objects cross.

  • Make sure OSNAP is always on! Right-click the OSNAP button to configure which points you want to snap to.

5. A Simple Practice Exercise: Draw a Window

Let’s use the basics to draw a simple rectangular window.

1. Turn On: Turn on ORTHO and OSNAP on the status bar.

2. Draw the Outer Frame: Type REC (for RECTANGLE) and press Enter.

   • Click anywhere in the drawing area to place the first corner.

   • Move your mouse and type @24,36 (This means a rectangle 24 units wide and 36 units tall). Press Enter.

3. Draw the Inner Panes: We’ll use the OFFSET command.

   • Type O (for OFFSET) and press Enter.

   • Type 2 as the offset distance and press Enter.

   • Click the rectangle you just drew, then click inside the rectangle. Press Enter to finish.

   • You now have a smaller, inner rectangle.

4. Draw a Muntin (the cross-bar): Type L (for LINE) and press Enter.

   • Hover over the midpoint of the left side of the inner rectangle until the “Midpoint” snap marker (a triangle) appears. Click.

   • Hover over the midpoint of the right side until the marker appears. Click.

   • Press Enter to end the LINE command.

5. You’re done! You’ve used several basic commands and drawing aids.

Next Steps & Best Practices

• Layers: Your next big concept. Layers are like transparent sheets. You put different parts of your drawing on different layers (e.g., a “Walls” layer, a “Doors” layer, a “Dimensions” layer). This keeps you organized and allows you to control visibility. The command is LAYER (or LA).

• Zoom and Pan: Use your mouse scroll wheel to zoom in and out. Press and hold the scroll wheel to pan around your drawing.

• Practice: The only way to learn is by doing. Try to draw the floor plan of a simple room in your house.