Request for power smoothing = 0

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gaspie
Posts: 5
Joined: Thu Mar 04, 2021 1:24 pm

Request for power smoothing = 0

Postby gaspie » Sat Apr 03, 2021 4:51 pm

There is a substantial lag between me stopping pedaling and my DIretoXR reporting correct power value = 0W. It takes at least 3-4 seconds for the trainer to notice that I'm NOT pedalling. If I'm riding at a 300W power level and suddenly stop pedalling, during the first second still 300W is reported, then some 100-150W and then (after 3 seconds) some 10-15W. I takes 4 seconds to reach zero!

The behaviour is the same for BLE and Ant+ FE-C connection. I already set power smoothing value = 1 in MyEtraining app. Yet it looks like DiretoXR is still smoothing and reporting false, sticky watts. This seriously impacts the in-game performance in Zwift, when a rider want to go into super-tuck position. The 3-4 delay is unacceptable for correct timing during the race.

I have 4iiii power meter on my bike and if I choose to use it as a power source instead of DIretoXR power and cadence are reported correctly, almost instantenously. So there must be something wrong with the trainer. Are those "sticky" watts from DiretoXR an error? Or is it intended power smotthing at minimal level = 1? If so, Is it possible to switch this feature entirely off (power smoothing = 0) so that power and cadence will be reported correctly?

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Elite Admin S
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Re: Request for power smoothing = 0

Postby Elite Admin S » Wed Apr 07, 2021 11:05 am

Hi gaspbeanie

You have to consider that Direto measures power on the hub and not on the pedal.
When you stop pedaling, on the hub there's still power for some seconds and the internal sensor measures it (and show it on screen)

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gaspie
Posts: 5
Joined: Thu Mar 04, 2021 1:24 pm

Re: Request for power smoothing = 0

Postby gaspie » Thu Apr 15, 2021 8:13 am

I have ridden powertap hub in IRL for 10+ years. As soon as I stop pedalling there is NO POWER on the hub. Speed is still there but there is NO TORQUE coming from drivetrain. Zero torque times some speed equals zero power!
Certainly you are mistaken on this. Other smart trainers have no this issue anyway.
Can we have an official statement from Elite on this subject?

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Elite Admin S
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Re: Request for power smoothing = 0

Postby Elite Admin S » Fri Apr 16, 2021 12:14 pm

Hi

On PowerTap you have a freewhell hub that interrupt completely (and immediately) the traction.
On Direto, instead, the hub is connected with the front pulley where there is still some friction for those seconds.
It's due to how the trainer works, we cannot change this.

Regards

gaspie
Posts: 5
Joined: Thu Mar 04, 2021 1:24 pm

Re: Request for power smoothing = 0

Postby gaspie » Sat Apr 17, 2021 8:34 am

Friction cannot create power - it's actually loss of power. Whe rider stops pedalling there is no source of power for the trainer.
Wahoo trainers DO NOT have this problem. My competitors are able to go into super-tuck position immediately because their trainers do not register false power for a few seconds.


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