Encoder calculation.
Selection of Encoder resolution. (Bits)
Encoder details (example to understand)
Formula:
where k is factor of safety range from 5 to 10.
Calculation:
Looking for Required accuracy:
- ±0.005°
Take conservative:
- Resolution = accuracy / 10 = 0.0005°
Now:
N=log2(3600.0005)≈19.5
N=log2(0.0005360)≈19.5
👉 So:
✔ Minimum: 20-bit encoder
✔ Preferred: 21–22 bit (for margin)
Quick Selection Table
Quick Selection Table
| Accuracy Required | Recommended Bits |
|---|---|
| ±0.05° | 14–15 bit |
| ±0.01° | 17–18 bit |
| ±0.005° | 20–21 bit |
| ±0.001° | 22+ bit |
Conclusion:
Above encoder support resolution upto 22 bit, prefer to select 22 bit.
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