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Lesson 2-10 – Advanced Object Editing

πŸŽ“ Lesson Plan: Advanced Object Editing

πŸ› 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


🎯 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.

πŸ—‚οΈ Lesson Structure

SectionDescription
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 Arraysβ€”copy 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

πŸ”§ Lesson Content

πŸ”Ή 1. Introduction

  • Editing tools reduce redrawing and improve efficiency.
  • Used heavily in architectural, mechanical, and site plans.

πŸ”Ή 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.

πŸ”Ή 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.

πŸ”Ή 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.

πŸ”Ή 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.

πŸ”Ή 6. OFFSET Tool

  • Command: OFFSET
  • Copies lines at a consistent distance away.
  • Use case: Walls, centerlines, paths, spacing of objects.

πŸ”Ή 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

πŸ› 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


🧠 Knowledge Check

  1. What’s the difference between TRIM and EXTEND?
  2. How do you add a 3mm radius corner between two lines?
  3. When should you use an ARRAY instead of COPY?
  4. What’s the effect of using OFFSET with a negative value?

βœ… Completion Checklist

βœ” Demonstrated use of TRIM, EXTEND, FILLET, CHAMFER, OFFSET, and ARRAY
βœ” Applied each command in a drawing project
βœ” Saved and named the file correctly
βœ” Answered all quiz questions