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sensor placement for cycle computer.(4 posts)

sensor placement for cycle computer.aet
Nov 26, 2001 8:50 AM
anyone know how much difference it makes where the wheelmagnet goes for cycling computers. i have rolf vector pros and could not set the thing up according to the picture in the manual but eyeballed it as best i could.
you think i may be getting bad readings for speed and distance?
Dont worry about the distance from the axle.vanzutas
Nov 26, 2001 9:06 AM
If you are worried that the distance from the axel to the sensor makes a difference, it doesn't. the sensor only counts how many times the wheel goes around and compares it to time. it does not matter how fast the magnet is traveling. The important thing is the gap between the magnet and the sensor. I like to get it around 1 mm.

There are those who say that you want it as close to the hubbill
Nov 26, 2001 12:09 PM
as works on the theory that, the farther is the magnet from the hub the more that the magnet adds to the rotating mass. Too close to the hub, however, and, even though the magnet passes the sensor the same number of times per revolution of the wheel, the magnet passes the sensor too slowly to register properly.
But I don't think that it matters very much.
thanks. i won't worry about it.aet
Nov 26, 2001 12:34 PM