TobyHarris
Automotive
Hi,
In order to make use of traction control facility on my ECU I have installed two hall effect speed sensors, one on the rear undriven wheel and one for the front driven wheel.
The problem I am having is that the ECU (Motec M4) looses the signal from the front wheel speed sensor consistantly at 20 mph. I placed an oscilliscope on the output of the sensor and can see that the signal is not being lost, though its not the square shape I was expecting.
Several examples of the signal taken from 'scope can be found
HERE and HERE
details of the sensor I am using can be found HERE
Does the orientation of the sensor make a difference ? it currently lies at 90 degree to the drawing.
The sensor ring / cog looks like THIS though it has been cleaned up on a lathe. Dimensions exceed those indicated in the drawing above.
As far as we can tell there is no run out between sensor and the attached cog. Distance between cog and sensor is in the region of 0.5mm.
Any ideas would be gratefully received
Thanks
In order to make use of traction control facility on my ECU I have installed two hall effect speed sensors, one on the rear undriven wheel and one for the front driven wheel.
The problem I am having is that the ECU (Motec M4) looses the signal from the front wheel speed sensor consistantly at 20 mph. I placed an oscilliscope on the output of the sensor and can see that the signal is not being lost, though its not the square shape I was expecting.
Several examples of the signal taken from 'scope can be found
HERE and HERE
details of the sensor I am using can be found HERE
Does the orientation of the sensor make a difference ? it currently lies at 90 degree to the drawing.
The sensor ring / cog looks like THIS though it has been cleaned up on a lathe. Dimensions exceed those indicated in the drawing above.
As far as we can tell there is no run out between sensor and the attached cog. Distance between cog and sensor is in the region of 0.5mm.
Any ideas would be gratefully received
Thanks