The engine in my car has a perfectly decent speed sensor on the output (it's a motorcycle engine and it's the sensor that Honda use to drive the speedo). I've got this wired into a frequency input on my DL1 Club. I can produce a user defined variable that shows the speed easily and, as you'd expect, the GPS speed varies slightly but not hugely.
However, if I set up the wheel speed formula in the car options then the standard wheel speed variable is resolutely zero. What's more, if I set the analysis/speed options to use the wheel speed sensor only the the data I see are clearly the GPS-derived speeds that were in use before.
This photo shows a quick graph with:
- The GPS speed which is clear from the various anomolies, even though the analysis options are set to take speed from the wheel speed sensor only.
- The wheel speed, resolutely zero even though the wheel speed calculation formula is set correctly
- My own wheel speed calculation using a user defined variable and the same formula as was used in (2)
Any idea what's going on?
(This is with Analysis 8.5.337. I haven't moved on because losing the screen tabs at the bottom of the display would be such a major pain for me.)