π Lesson Plan: Advanced Object Editing
π οΈ Focus: TRIM, EXTEND, FILLET, CHAMFER, OFFSET, and ARRAY tools
Level: Intermediate Beginner (End of Level 1 or start of Level 2)
Duration: 90 minutes
Delivery Mode: Self-study or instructor-led
π― Learning Objectives
By the end of this lesson, students will be able to:
- Edit existing geometry using advanced modification tools.
- Understand when and how to use each tool effectively.
- Streamline repetitive geometry creation with the ARRAY command.
- Apply multiple editing tools in a combined workflow.
ποΈ Lesson Structure
Section | Description |
---|---|
1. Introduction (5 min) | Why advanced editing tools improve workflow and precision |
2. TRIM Tool (10 min) | Remove excess line segments using cutting edges |
3. EXTEND Tool (10 min) | Lengthen lines to meet boundaries |
4. FILLET Tool (10 min) | Create rounded corners between two objects |
5. CHAMFER Tool (10 min) | Create angled corners between two objects |
6. OFFSET Tool (10 min) | Duplicate geometry at a fixed distance (lines, circles, etc.) |
7. ARRAY Tool Overview (15 min) | Rectangular, Polar, and Path Arraysβcopy objects in structured patterns |
8. Combination Practice (15 min) | Apply multiple tools in one drawing scenario |
9. Knowledge Check & Review (5 min) | Recap tools and test student understanding |
π§ Lesson Content
πΉ 1. Introduction
- Editing tools reduce redrawing and improve efficiency.
- Used heavily in architectural, mechanical, and site plans.
πΉ 2. TRIM Tool
- Command:
TRIM
- Use to cut off parts of an object using other objects as edges.
- Example: Trim wall lines at door openings.
- Shortcut: Select boundaries β press Enter β click objects to trim.
πΉ 3. EXTEND Tool
- Command:
EXTEND
- Use to lengthen objects to meet boundary edges.
- Example: Extend wall lines to reach perimeter boundary.
- Note: Works like TRIM but in the opposite direction.
πΉ 4. FILLET Tool
- Command:
FILLET
- Joins two lines with a smooth arc.
- Options:
- Radius (default is 0 = sharp corner)
- Polyline (fillet all corners at once)
- Use case: Round a table or desk edge.
πΉ 5. CHAMFER Tool
- Command:
CHAMFER
- Joins two objects with a straight beveled edge.
- Options:
- Distance or angle
- Can use on lines, polylines, etc.
- Use case: Angled cut on a metal plate.
πΉ 6. OFFSET Tool
- Command:
OFFSET
- Copies lines at a consistent distance away.
- Use case: Walls, centerlines, paths, spacing of objects.
πΉ 7. ARRAY Tool
- Command:
ARRAY
- Types:
- Rectangular: Rows and columns (e.g., tiles)
- Polar: Circular patterns (e.g., bolts around a flange)
- Path: Along a curve (e.g., lights along a path)
- Customize: number of items, spacing, rotation
π οΈ Hands-On Practice
Task: Create a decorative metal plate:
- Use OFFSET to create borders.
- Use CHAMFER and FILLET on corners.
- Add mounting holes with POLAR ARRAY.
- Use EXTEND and TRIM to align features.
Save as: editing_exercise.dwg
π§ Knowledge Check
- Whatβs the difference between TRIM and EXTEND?
- How do you add a 3mm radius corner between two lines?
- When should you use an ARRAY instead of COPY?
- Whatβs the effect of using OFFSET with a negative value?
β Completion Checklist
β Demonstrated use of TRIM, EXTEND, FILLET, CHAMFER, OFFSET, and ARRAY
β Applied each command in a drawing project
β Saved and named the file correctly
β Answered all quiz questions