Automatic Door Operators, Motors, and Mechanical Systems

Designed for aspiring and practicing entry-level technicians, this course covers the operational theory, mechanical architecture, and electrical drive assemblies found in commercial automatic swinging, sliding, and folding doors. Students examine the physical forces involved in door movement, calculating door mass inertia and torque requirements using mechanical formulas such as $\tau = F \cdot r$. Key topics include fractional horsepower alternating current and direct current motors, solid-state drive controls, low-energy versus full-energy operator configurations, speed reduction gearboxes, drive belts, push/pull arm geometry, and spring-assisted closure assemblies. Through systematic analysis and hands-on component disassembly, learners cultivate the skills needed to install, align, adjust, and diagnose electromechanical and electrohydraulic mechanisms without vendor bias. Emphasis is placed on safe shop practices, precise mechanical measurements, electrical load verification, and methodical troubleshooting techniques required for dependable commercial operation.

InstructorJacob Calhoun

Course outline

Lectures, virtual labs, and graded assignments — completed in your browser.

01Lesson 1: Introduction to Automatic Door Types, Kinematics, and Mechanical Fundamentalslecture

02Lesson 2: AC and DC Fractional Horsepower Motors and Electrical Drive Ratingslecture

03Lesson 3: Power Transmission Systems: Gears, Chains, Belts, and Pulleyslecture

04Hands-on Lab: Disassembly, Inspection, and Reassembly of Motor and Gearbox Assemblieslab

05Lesson 5: Electromechanical Swing Operators and Linkage Geometrylecture

06Lesson 6: Electrohydraulic Operators, Fluid Reservoirs, and Hydraulic Valve Regulationlecture

07Lesson 7: Low-Energy versus Full-Power Operators and Mechanical Spring Closeslecture

08Hands-on Lab: Swing Door Operator Installation, Header Leveling, and Arm Calibrationlab

09Lesson 9: Sliding Door Header Construction, Carrier Rollers, and Guide Trackslecture

10Lesson 10: Linear Drive Belts, Cable Systems, and Emergency Egress Breakout Hardwarelecture

11Hands-on Lab: Sliding Door Hanger Alignment, Belt Tensioning, and Roller Adjustmentslab

12Lesson 12: Position Feedback Systems: Limit Switches, Mechanical Stops, and Optical Encoderslecture

13Lesson 13: Mechanical Component Diagnostics, Load Imbalances, and Wear Analysislecture

14Capstone Service Project: Multi-Operator Mechanical Overhaul, Calibration, and Commissioningassignment

Syllabus

["Week 1: Lesson 1: Introduction to Automatic Door Types, Kinematics, and Mechanical Fundamentals", "Week 2: Lesson 2: AC and DC Fractional Horsepower Motors and Electrical Drive Ratings", "Week 3: Lesson 3: Power Transmission Systems: Gears, Chains, Belts, and Pulleys", "Week 4: Hands-on Lab: Disassembly, Inspection, and Reassembly of Motor and Gearbox Assemblies", "Week 5: Lesson 5: Electromechanical Swing Operators and Linkage Geometry", "Week 6: Lesson 6: Electrohydraulic Operators, Fluid Reservoirs, and Hydraulic Valve Regulation", "Week 7: Lesson 7: Low-Energy versus Full-Power Operators and Mechanical Spring Closes", "Week 8: Hands-on Lab: Swing Door Operator Installation, Header Leveling, and Arm Calibration", "Week 9: Lesson 9: Sliding Door Header Construction, Carrier Rollers, and Guide Tracks", "Week 10: Lesson 10: Linear Drive Belts, Cable Systems, and Emergency Egress Breakout Hardware", "Week 11: Hands-on Lab: Sliding Door Hanger Alignment, Belt Tensioning, and Roller Adjustments", "Week 12: Lesson 12: Position Feedback Systems: Limit Switches, Mechanical Stops, and Optical Encoders", "Week 13: Lesson 13: Mechanical Component Diagnostics, Load Imbalances, and Wear Analysis", "Week 14: Capstone Service Project: Multi-Operator Mechanical Overhaul, Calibration, and Commissioning"]