Want to enhance your company’s knowledge of precision motion systems? No longer does it take years to develop the internal expertise in motion platform design and selection. Advanced Motion Concepts, Inc. has shortened the motion learning curve with two unique short courses that are based on 20 years of practical experience. These short courses are sold as a two volume set in spiral bound printing with the material shown in powerpoint format.
Precision Linear Motion Design I:
A comprehensive overview of precision motion design. This short course begins with a discussion of the most common system-level design criteria such as position resolution, accuracy, repeatability, throughput and cost. Subsequently, it covers the fundamental components that must be properly selected for any linear motion system to meet its required specifications; including bearings, drive methods, controls, feedback devices, structural materials, and cabling. The relative advantages of each technology will be provided along with section summaries, which relate component features to the desired system-level design criteria. The course will include discussions of both existing technologies (crossed roller bearings, linear guides, ballscrews, leadscrews, timing belts, step motors and servo motors) and new technologies (linear motors, piezo motors). The goal of this short course it to provide you with an enhanced system-level understanding so that your next project will be a success whether you are designing a precision motion system, specifying motion subsystems or choosing a supplier.
Precision Linear Motion Design II:
An in-depth, analytical short course that covers the performance equations, charts and examples which are the foundation of precision motion design. This unique short course builds on the information provided in Precision Linear Motion Design I and covers in detail advanced topics on the design of precision automation equipment. It is the only short course that quantifies, all in one place, the equations, charts and detailed examples that are the foundation of precision motion design. This course is a must for the design engineer trying to implement a successful motion system. This course covers advanced topics such as error budgets for systems with 2 or 3 axes, sizing of mechanical bearings and ballscrew/leadscrew actuators, sizing rotary and linear motors, calculating stage settling time for an open loop or servo system and calculating the most common stage resonances.
| Precision Linear Motion Design I | Precision Linear Motion Design II |
| Section 1: Introduction • Typical Applications • Linear Motion System Components • System Configurations |
Section 1: System Error Budgets • Error Sources – Bearing, Drive, Feedback, Thermal and Assembly • Error Budget for Single Axis • Error Budget for Compound Axes – X-Y, X-Y-Z |
| Section 2: System Level Design Criteria • Linear Motion Specifications – Definitions, Limiting Factors, Data Examples and Performance Guidelines – Travel, Position Resolution, Accuracy/Repeatability, Throughput (Move and Settle time) – Position Stability, Constant Velocity, Cost, Reliability and Environmental Compatibility |
Section 2: Bearing Sizing • Linear Bearing Fatigue – Fatigue Life and Mean Load Formula, Life Factors • System Analysis (two rail, four modules) – Model with Forces Applied in All Directions (X-Y-Z) – Summary of Radial Forces, Lateral Forces and Moments • Bearing Sizing Example • System Stiffness (two rail, four modules) – Translation and Rotation Stiffness (roll, pitch, yaw) |
| Section 3: Bearing Selection • Linear Bearing Classifications • Review of Air and Rolling Bearings (Linear Bushing, Linear Guide, V-Groove) – Bearing Description, Loading and Mounting Configurations – Advantages/Disadvantages • Linear Bearing Summary – Bearing Features vs. System Criteria |
Section 3: Actuator Sizing • Ballscrew and Leadscrew Introduction • Maximum Rotation and Linear Speed – Critical Speed Formula, DN Value, Example Calculation • Linear Drive Resolution • Ballscrew Fatigue Life – Fatigue Life and Mean Load Formula, Life Factors – Axial Forces for Horizontal and Vertical Applications • Axial Stiffness of Drive Assembly – Ballscrew Shaft/Nut Stiffness and Total Drive Stiffness Formula • Self-Locking/Backdriving Formula |
| Section 4: Drive Method/Control Selection • Linear Drive Classifications • Review of Rotary to Linear Drives – Timing Belt, Ground Ballscrew, Ground Leadscrew and Rolled Leadscrew – Advantages/Disadvantages • Rotary to Linear Drive Summary – Drive Features vs. System Criteria • Coupling Types and Feature Comparison • Review of Rotary Motors – Description of Step and Brushless DC Motors – Advantages/Disadvantages – Cost and Performance Comparison • Review of Direct Drives – Description of Ironless, Ironcore and Tubular Linear Motors – Advantages/Disadvantages of Linear Motor Types – Cost and Performance Comparison of Linear Motor Types – Description of Piezo Motor – Advantages/Disadvantages of Piezo Motor • Direct Drive Summary – Drive Features vs. System Criteria |
Section 4: Rotary Motor Sizing • Rotary Motor Introduction • Steps for Sizing Rotary Motors • Review of Motion Profiles with Kinematic Equations • Torque Equations: Constant, Acceleration, Peak and RMS • Discussion of Speed vs. Torque Curves • Motor Sizing Example |
| Section 5: Feedback Selection • Review of Linear Feedback Devices – Description of Rotary and Linear Encoders – Advantages/Disadvantages – Linear Encoder Comparison: Tape vs. Glass Scale – Linear Encoder/Motor Placement • Feedback Summary – Feedback Features vs. System Criteria |
Section 5: Linear Motor Sizing • Linear Motor Introduction • Steps for Sizing Linear Motors • Review of Motion Profiles with Kinematic Equations • Force Equations: Constant, Acceleration, Peak and RMS • Continuous Power and Maximum Motor Temperature • Continuous Current, Peak Current and Amplifier Voltage • Gantry Motor Sizing |
| Section 6: Material Selection • Material Review – Advantages/Disadvantages – Material Property Comparison |
Section 6: Stage Settling Time • Open Loop Model without Friction – Review of Laplace Transforms – Settling Time Approximations • Open Loop Model with Friction • Comparison of Open Loop Models • Servo Settling – Servo Model Development – Transient Response of Servo Model – Settling Time Approximations – Servo Settling Example |
| Section 7: Cable Selection • Flexible Cable Review – Advantages/Disadvantages |
Section 7: Stage Resonance • Servo System Stability – Frequency Response, Bode Plots • Coupling Resonance • Linear Resonance • Mitigating Resonance |
| Section 8: Summary/Open Discussion • Summary • Application Example • Open Discussion |