[Dr_C]

Hi Rick,

Its nice to see the vertical loop with SSD cars running at approx 7m/s. Impressive.

I am concerned if your trials are unsuccessful it may unfairly cast doubt on the performance of the ARC PRO which in my opinion is an excellent piece of kit.

Hence three points to keep in mind.

1/ the positioning of the IR LED so close to the guide will reduce the max speed for reliable detection for ID6 - this max speed is likely to be about 3m/s. This could be improved using the grey wire mod but that means the solution is non stardard.

2/ If using the Hornby app the pit exit sensor is an integral part of the lap counting algorithm - miss this out (as you appear to have done) and there will be an (infinity -1) of missed laps.

3/ If using the Magic app there is a minimum lap time below which laps are ignored. The minimum setting is 1 .0 seconds. However with your test loop at 7m/s the minimum loop time is approx 0.8 seconds - so lots of laps will be missed.

Lots to think about as you ponder the results... 

c