Lesson 2: The Mirror Command & Dimension Units
Duration of Days: 1
Lesson Objective
Students will use the Mirror tool to create symmetrical mechanical parts and modify dimension units for fractional accuracy.
How does the Mirror command reduce drafting time by 50%?
Why might we change dimension units from decimal to fractional?
Mirror Line, Symmetry, Precision, DimStyle (Dimension Style).
CT CADD.06.01: Demonstrate the use of editing and modify commands.
CT CADD.08.01: Apply dimensions and annotations.
Using Drafting Plate 1-1, students draw one half of a symmetrical mechanical bracket. They will use the MIRROR command to complete the object and apply dimensions, adjusting the DIMSTYLE to match the specific print requirements.
Purpose: To master efficiency in symmetrical design.
DOK Level: 2.
Provide a video screen-cast of the Mirror command process; offer a "Symmetry Checklist" for self-monitoring.
Plate 1-1 Rubric: Check for mirrored object alignment and accurate fractional dimensioning.
CAD Book - Basic Mechanical Drafting 1-1.