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Negative Friction detected after check calibration
Posted: Fri Dec 27, 2019 6:24 am
by alainlai
Dear Velocomp,
My PC crashed and I lost all my bikes' profiles. How do I backup my bike's profile using Isaac? I did a new device setup and did some calibrations.
Pls verify my ride file. Thanks.
Aero 1.029 -> 0.650
Wind Scaling 2.920 -> 1.844
CdA 0.353 -> 0.353 m^2
Fric 5.936 -> -122.739
Riding Tilt -0.3 -> 15.7 %
Crr 0.0044 -> 0.0044
Cal Weight 82 -> 83 kg
----------------------------------
Avg Power 176.3 -> 131.0 W
Avg Wind 6.4 -> -0.7 km/h
Re: Negative Friction detected after check calibration
Posted: Fri Dec 27, 2019 11:00 am
by Velocomp
The negative friction number is suggesting that your PP angle has shifted significantly.
I would do a new calibration ride.
Re: Negative Friction detected after check calibration
Posted: Sun Dec 29, 2019 6:42 pm
by alainlai
Noted with thanks.
Re: Negative Friction detected after check calibration
Posted: Mon Dec 30, 2019 8:01 am
by lorduintah
While in this case it sure looks like the PP tilt is radically different )not just identified by the friction coefficient, but also the tilt value), the answer to your other question about profiles - you can extract profile data from good rides. This feature is part of Isaac. So if you did not trash the ride files, then you can open and extract the necessary data.
Velocomp has made the calibration process so simple that having to get a new one is not much of an interruption to your rides.
Re: Negative Friction detected after check calibration
Posted: Mon Dec 30, 2019 8:17 pm
by alainlai
Thanks for your feedback. Re-aligned the powerpod and did the O&B ride over the weekend.
Re: Negative Friction detected after check calibration
Posted: Wed Jan 01, 2020 12:49 pm
by Kcblair
alainlai wrote: ↑Fri Dec 27, 2019 6:24 am
Dear Velocomp,
My PC crashed and I lost all my bikes' profiles. How do I backup my bike's profile using Isaac? I did a new device setup and did some calibrations.
Pls verify my ride file. Thanks.
Aero 1.029 -> 0.650
Wind Scaling 2.920 -> 1.844
CdA 0.353 -> 0.353 m^2
Fric 5.936 -> -122.739
Riding Tilt -0.3 -> 15.7 %
Crr 0.0044 -> 0.0044
Cal Weight 82 -> 83 kg
----------------------------------
Avg Power 176.3 -> 131.0 W
Avg Wind 6.4 -> -0.7 km/h
Go to edit profiles, and export to some other folder. I have a USB drive always plugged in , to backup Important stuff. Had a HHD go down, was lucky , I had just exported all my current profiles.
Re: Negative Friction detected after check calibration
Posted: Wed Jan 01, 2020 7:35 pm
by alainlai
Dear Sir,
Thanks for your feedback. Will try the export function.