SPRUHJ0C April   2013  – October 2021 TMS320F28068M , TMS320F28069-Q1 , TMS320F28069M , TMS320F28069M-Q1

 

  1. 1Read This First
    1. 1.1 About This Manual
    2. 1.1 Glossary
    3. 1.1 Support Resources
    4.     Trademarks
  2. 1 F2806xM InstaSPIN-MOTION Enabled MCUs
  3. 2InstaSPIN-MOTION Key Capabilities and Benefits
    1. 2.1 Overview
    2. 2.2 FAST Unified Observer
    3. 2.3 SpinTAC Motion Control Suite
      1.      IDENTIFY
      2.      CONTROL
      3.      MOVE
      4.      PLAN
    4. 2.4 Additional InstaSPIN-MOTION Features
  4. 3InstaSPIN-MOTION Block Diagrams
    1.     Scenario 1: InstaSPIN-MOTION Speed Control with FAST Software Encoder
    2.     Scenario 2: InstaSPIN-MOTION Speed Control with a Mechanical Sensor
    3.     Scenario 3: InstaSPIN-MOTION Position Control with Mechanical Sensor and Redundant FAST Software Sensor
  5. 4Application Examples
    1. 4.1 Treadmill Conveyor: Smooth Motion Across Varying Speeds and Loads
    2. 4.2 Video Camera: Smooth Motion and Position Accuracy at Low Speeds
    3. 4.3 Washing Machine: Smooth Motion and Position Accuracy at Low Speeds
      1.      Agitation Cycle
      2.      Spin Cycles
    4. 4.4 InstaSPIN-MOTION Works Over the Entire Operating Range
  6. 5Evaluating InstaSPIN-MOTION Performance
    1. 5.1 Overview
    2. 5.2 Velocity Control Performance: SpinTAC vs PI
      1. 5.2.1 Disturbance Rejection
      2. 5.2.2 Reference Tracking
      3. 5.2.3 Step Response
    3. 5.3 Position Control Performance: SpinTAC vs PI
      1. 5.3.1 Disturbance Rejection
      2. 5.3.2 Reference Tracking
      3. 5.3.3 Step Response
      4. 5.3.4 Inertia Estimation Repeatability
  7. 6Microcontroller Resources
    1. 6.1 CPU Utilization
    2. 6.2 Memory Utilization
    3. 6.3 Pin Utilization
      1.      A Resources
        1.       B Definition of Terms and Acronyms
          1.        C Revision History

4.1 Treadmill Conveyor: Smooth Motion Across Varying Speeds and Loads

Consistent speed control is critical for treadmill conveyor belts. When a person runs on a treadmill, their stride disturbs the motion of the belt. The runner's stride will be choppy if the motor driving the belt cannot quickly provide enough torque to overcome the disturbance. This problem is exacerbated when the user changes speeds as part of their exercise regime. If the belt does not smoothly accelerate or decelerate it seems like the treadmill is not operating correctly. In addition, at low speeds when a user steps on the belt, their weight can cause the belt to stop.

InstaSPIN-MOTION was applied to a commercial treadmill using a 4-HP, 220-V AC induction motor to drive the conveyor belt. The treadmill was tested across a variable speed range: 42 rpm at the low end to 3300 rpm at top speed.

The customer found that InstaSPIN-MOTION's advanced controller automatically compensated for disturbances, keeping the speed consistent while running and across changing speeds. The controller prevented the belt from stopping at low speeds when a load was applied. In addition, a single gain was used to control the entire operating range.