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Module 1: FDM Technology Fundamentals

Duration: 3 hours | Microcredential: MCCPDL-U01M1-v1.0

Module Overview

This module establishes the foundational understanding of Fused Deposition Modeling (FDM) technology, including the thermoplastic extrusion process, printer architecture, material science basics, and the physics governing print quality. Students will learn how temperature, pressure, and velocity interact to produce solid plastic parts from filament, and how printer geometry (build volume, nozzle diameter, XY resolution) constrains design and execution.

Learning Objectives

  1. Explain the complete FDM extrusion cycle from filament hopper to deposited layer
  2. Identify and describe the functional role of 10+ major printer components
  3. Apply thermoplastic material properties (Tg, tensile strength, durometer) to print parameter selection
  4. Predict print quality outcomes based on printer specifications and material choice
  5. Recognize design constraints imposed by FDM technology (layer height, minimum feature size, support requirements)

Module Structure

  • Slides: 5 slide presentations (Extrusion Physics, Printer Anatomy, Thermoplastic Materials, Build Volume & Resolution, Heat Transfer & Adhesion)
  • Activities: 3 hands-on labs (Filament Cross-Section Analysis, Printer Component Identification, Material Data Sheet Review)
  • Assessment: 12-question module quiz covering concepts and applications
  • Common Pitfalls: 4 scenarios addressing beginner misconceptions
  • Safety Protocols: 2 procedures (thermal hazard awareness, filament handling)
  • Student Materials: 4 reference guides (Component Anatomy Chart, Material Properties Table, Glossary, Quick Comparison Matrices)
  • Discussion Guides: 2 facilitated discussions (Design Trade-offs, Material Selection Logic)
  • Neurodiverse Accommodations: 4 learning profiles (ADHD, Autism, Dyslexia, Sensory)

Key Concepts Covered

  • Extrusion Process: Filament melting → pressure buildup → controlled nozzle extrusion → layer deposition
  • Thermoplastics: Amorphous vs. Crystalline structure, glass transition temperature (Tg), anisotropy in printed parts
  • Printer Geometry: Cartesian, CoreXY, and Delta configurations; build platform size; nozzle diameter constraints
  • Resolution: XY resolution (nozzle diameter dependent), Z resolution (layer height), minimum feature size (2-3mm walls)
  • Adhesion: First layer critical for print success; role of bed temperature, surface texture, leveling precision
  • Material Behavior: Warping/shrinkage, anisotropic strength (layers stronger along extrusion than perpendicular), thermal stress

Time Allocation

Segment Duration Activity
Introduction & Overview 15 min Instructor presentation + learning objectives
Slide 1: Extrusion Physics 25 min Presentation + discussion
Slide 2: Printer Anatomy 25 min Presentation + component identification activity
Slide 3: Thermoplastic Materials 20 min Presentation + material data sheet analysis
Slide 4: Build Volume & Resolution 20 min Presentation + design constraint discussion
Slide 5: Heat Transfer & Adhesion 20 min Presentation + troubleshooting intro
Activity: Filament Analysis Lab 30 min Hands-on microscopy & property discussion
Q&A + Wrap-up 15 min Review key points, preview Module 2

Assessment Strategy

  • Formative: In-module 12-question quiz (70% pass threshold)
  • Checkpoint: Component identification checklist (can identify 10+ parts by name and function)
  • Practical: Material selection scenario (given functional requirements, justify material and basic print settings)

Standards Covered

  • ANSI/ISO 52901:2020: General Principles and Terminology for Additive Manufacturing
  • ISO 52911-1:2019: Design and Modeling — Geometry and Tolerances
  • ASTM D257: Electrical Conductivity/Resistivity of Plastics (for antistatic filament discussion)

Prerequisites

  • No prior 3D printing experience required
  • Basic understanding of temperature and pressure concepts
  • Familiarity with common tools and workshop safety

Resources Needed

  • Live FDM printer (any brand suitable for demonstration)
  • Filament samples (PLA, ABS, PETG, TPU) for cross-section analysis
  • Microscope or magnifying glass
  • Thermal imaging camera (preferred for live Tg demonstration)
  • Material data sheet library (printed or digital)
  • Component anatomy posters

Success Criteria

  • Score ≥70% on module quiz
  • Identify ≥8 of 10 printer components correctly with functional descriptions
  • Explain the relationship between Tg and bed/nozzle temperature for at least 2 materials
  • Articulate 3 reasons why FDM prints are stronger along extrusion direction than perpendicular

Next Module: M2 - Machine Setup & Calibration (Apply concepts to real printer configuration)