| TABLE OF CONTENTS |
|---|
| 1. | Introduction | 2 |
| 2. | Geometric Relationships | 2 |
| 2.1. | Belt and Pulley Pitch | 2 |
| 2.2. | Belt Length and Center Distance | 4 |
| 3. | Forces Acting in Timing Belt Drives | 5 |
| 3.1. | Torque, Effective Tension, Tight and Slack Side Tension | 5 |
| 3.2. | Shaft Forces | 10 |
| 3.3. | Belt Pre-Tension | 11 |
| 3.4. | Resolving the Tension Forces | 12 |
| 3.5. | Tooth Loading | 14 |
| 5. | Positioning Error of Timing Belt Drives Due to Belt Elasticity | 15 |
| 6. | Figures | |
| 6.1. | Figure 1 | 2 |
| 6.1.1. | Figure 1a. Belt and Pulley Mesh for Inch Series and Metric T-series, HTD and STD Series Geometry | 2 |
| 6.1.2. | Figure 1b. Belt and Pulley Mesh for AT Series Geometry | 2 |
| 6.2. | Figure 2. Belt Drive with Unequal Pulley Diameters | 4 |
| 6.3. | Figure 3. Power Transmission and Rotary Positioning | 5 |
| 6.4. | Figure 4. Linear Positioner - Configuration I | 6 |
| 6.5. | Figure 5. Linear Positioner - Configuration II. | 7 |
| 6.6. | Figure 6. Inclined Conveyor with Material Accumulation | 8 |
| 6.7. | Figure 7. Vacuum Conveyor | 9 |
| 6.8. | Figure 9. Power Transmission Drive with the Constant Slack Side Tension | 12 |
| 6.9. | Figure 10. Vacuum Conveyor with the Constant Slack Side Tension | 12 |
| 6.10. | Figure 11. Tooth Loading | 14 |
| 6.11. | Figure 12. Position Error - Linear Positioner under Static Loading Condition | 15 |
| 6.12. | Figure 13. Following Error - Linear Positioner under Dynamic Loading Condition | 16 |
| 7. | Graphs | |
| 7.1. | Graph 1. Correction for the Number of Teeth in Mesh | 17 |
| 8. | Tables | |
| 8.1. | Table 1 | 3 |
| 8.2. | Table 2 | 4 |
