DESIGNER’S HANDBOOK 4189350049C EN
Page 83 of 206
When the disc is rotating clockwise,
the 25 % mechanical offset between the sensors will delay the signal from sensor no. 2 with 25 % of the period
time (90 degree phase shift) as illustrated below.
When the disc rotates Counterclockwise, the 25 % mechanical offset between the sensors will make the signal
from sensor no. 2 arrive 25 % of the period time ahead of the signal from sensor no.1, as illustrated below.
Positioning of the sensors
The signal below is from the test system mentioned before where the
disc has 16 bolts and where the size of the bolt head is only ¼ of the
distance between bolts. This results in a pulse shape with 25 % duty
cycle.
Depending on the location of sensor no. 2, the signal will be more or less
delayed.
