What limits the resolution of OnAxis™ magnetic encoders?
The maximum achievable resolution for magnetic encoders based on the Hall effect is limited by a number of factors. The main source for noise is electrical noise from the Hall sensors themselves.
Peak noise for a well-optimised system is normally in the range of 0.02°. This limits the resolution for magnetic encoders with Hall sensors to 13 bits (8192 counts per revolution).
13 bit resolution |
360° / 8192 = 0.04° |
higher than sensor noise |
14 bit resolution |
360° / 16384 = 0.02° |
equal to sensor noise |