SLYU064A June   2023  – December 2023 TMAG3001 , TMAG5170 , TMAG5170-Q1 , TMAG5170D-Q1 , TMAG5173-Q1 , TMAG5253 , TMAG5273

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Joystick Design
    1. 2.1 Establishing Form Factor
      1. 2.1.1 Choosing Mechanical Implementation
      2. 2.1.2 Choosing Magnetic Implementation
    2. 2.2 Magnet Sensor Placement
    3. 2.3 Design Calculations
    4. 2.4 Post Processing
    5. 2.5 Prototyping and Bench Testing
    6. 2.6 Error Sources
      1. 2.6.1 Mechanical Hysteresis
      2. 2.6.2 Nearby Material Influence
      3. 2.6.3 Fulcrum Slippage
      4. 2.6.4 Offset
  6. 3Lever Design
    1. 3.1 Establishing a Form Factor
      1. 3.1.1 Choosing Mechanical Implementation
    2. 3.2 Magnet Sensor Placement
    3. 3.3 Design Calculations
    4. 3.4 Prototyping and Bench Testing
    5. 3.5 Error Sources
  7. 4Summary
  8. 5References
  9. 6Revision History

2.1.2 Choosing Magnetic Implementation

The magnetic implementation corresponds to the type of magnet, the path of motion, and the orientation of the magnet and sensor relative to each other. Figure 2-2 shows a couple possible magnetic implementations per mechanical method introduced in Figure 2-1. Starting from the left, there are two mechanical method 1 options with either a sphere or cylindrical magnet. Then in the middle are two mechanical method 2 options with either a axial ring magnet or a diametric ring magnet. Lastly on the right are two mechanical method 3 options, with one having a central axial ring magnet on the joystick shaft, while the other has two bar magnets that rotate with the axles. Each of these has unique design challenges and may have a unique sensor pairing.

GUID-20230216-SS0I-H3ZW-20LL-JHTMPVCKNXJ2-low.svg Figure 2-2 Magnetic Implementations