Tacx Flux resistance control

[guido.n...@googlemail.com]

Hallo,

when I ride a workout on the Flux in TTS4 with f.e. 200W the resistance stays the same no matter what cadence or gear I use.
I think this is what you call "powermatch".
When I am riding intervals I can use the same cadence an gear for the whole workout and always have the correct resistance.

In GC the resistance is also controlled by the Flux but it is not stable when I change cadence or switch to an other gear.
This mean that there is a great difference in resistance when I change the cadence from 80 to 100.
In GC I always have to look at the display to know that the actual Watts are the same as I planned for the workout.

Is this feature not implemented in GC or is it just an issue of configuration.

[Jon Escombe]

Hi,

That should work. What do your settings look like in Options -> Training
-> Train Devices?

Regards,
Jon

[Guido Nottebrok]

I use the sensors

Heartrate (Garmin belt)

Power (Flux)
Speed + Cadence (Flux)
Fitness Equipment Control (Flux)

[Karl Billeter]

On Thu, Dec 22, 2016 at 05:43:33AM -0800, guido.nottebrok via golden-cheetah-users wrote:

> Hallo,
>
> when I ride a workout on the Flux in TTS4 with f.e. 200W the resistance
> stays the same no matter what cadence or gear I use.

This doesn't sound like constant power.

> I think this is what you call "powermatch".

This term usually refers to adjusting a trainer's internally measured power
with an external power meter.

> When I am riding intervals I can use the same cadence an gear for the whole
> workout and always have the correct resistance.
>
> In GC the resistance is also controlled by the Flux but it is not stable
> when I change cadence or switch to an other gear.
> This mean that there is a great difference in resistance when I change the
> cadence from 80 to 100.

Changing from 80rpm to 100rpm should give you 20% less resistance for the same
power output

> In GC I always have to look at the display to know that the actual Watts
> are the same as I planned for the workout.
>
> Is this feature not implemented in GC or is it just an issue of
> configuration.

Unless I'm quite confused, I don't see how it could work. Changing gear
rather than cadence is another matter, as the load on the trainer can be
adjusted to be the same resistance across different gears. You may or may not
notice different inertia in this case.

K

[Jon Escombe]

As long as the Flux is selected for FE-C then it should work, it might
be worth re-pairing and ignoring the Power and S&C channels though (just
change to 'Unused' if they are found). The FE-C channel will provide all
that data, and we have a bit of a compatibility issue with the Taxc S&C
data from some trainers at the moment..

In the Train tab, am assuming you have either an erg file, or the
'Manual Erg Mode' entry selected in the side bar, and have pressed the
play button so that the timer is running. And the trainer is still not
adjusting its resistance to keep you at your target power?

If that is the case, can you see whether 'Manual Slope Mode' works for
you either? That won't try to match a target power, but should
increase/decrease the overall resistance as you change the slope with
the up/down arrows in the workout control pane.

Cheers,
Jon

[Guido Nottebrok]

Thanks jone.
I paired it again only with FE-C an everything is working as expected.

And in my first post I was wrong. The resistance stays not the same when I change the cadence.