Lap counter not being tripped by car

[LesD]

I have an ARC AIR set and one of my cars, a F1 Williams stopped activating the lap counter.

I eventually discovered it was because the screw which holds the guide onto the chassis was loose.

An easy fix , presumably worked loose with use.

[Andy P.]

Thanks LesD,

Interesting that the loose guide blade did not trigger a lap count.

Usually it is because they are not black (the infra red can't "see" anything that isn't black).

I can only think that it was wobbling so much that the sensor didn't know what to make of it...

[LesD]

I was aware of the colour issue, perhaps the guide was bouncing over the counter?

the lap counter follows a bend and cars tend to hit the barrier at that point

[Andy P.]

that could well be... if the blade is at the extreme and very high in the slot it could not be triggering.

I know you should always have a bit of a straight (ideally a half at least, 78 mm will do in a pinch) before any lane change to make sure the IR LED is over the sensor.

It could also be your sensors have sunk into the track and/or are not perfectly aligned ...