Which settings for device configuration for Elite Quick-Motion rollers?

[Alexandre Petrescu]

Hi,

After successful pairing, which settings you advise on the configuration box for Elite Quick-Motion rollers with  Misuro B+ sensor?

[Alexandre Petrescu]

Hi,

To advance this topic, I understand a virtual power curve may be needed for Elite Quick-Motion rollers.

Elite published a figure with the power curve of these rollers in the publicly available file scheda_tecnica_quik-motion_2017_en.pdf.

From that figure, I started to interpolate the intersection points, using the PowerPoint tool.

But then it became very tedious to obtain numbers (I stopped short of creating a ruler for the horizontal line with the tool Distribute horizontally of PowerPoint); so I asked Elite for
the numbers.  Elite quickly and kindly provided the numbers in an excel sheet.

I understand that from this data an equation must be created.  I would still have to create it.

[Rui_B]

I have a similar interest —  calculating & displaying realtime virtual power using the data generated by my Polar Speed Sensors on the Krietler 2.5 rollers and the relationship table generated by an SRM power meter and a speed sensor on the Krieler 2.5 rollers (see attached). I would like to then create workouts etc in GoldenCheetah using this virtual power along with cadence and HR data from the Polar sensors. Currently TrainerRoad has the capability of collecting my sensor data, and creating virtual power data, enabling workouts to be preformed and created , it would be nice to have this in Golden Cheetah too. 

[Alexandre Petrescu]

Your attached file contains a directory list, but no numbers:

[Alexandre Petrescu]

Today I received approval from Elite saying that I am allowed to publish the numbers for Elite Quick Motion power curve.

These are the numbers.

And in the attached file.

[Alexandre Petrescu]

There is a discussion about how to add power curves there
https://groups.google.com/forum/#!topic/golden-cheetah-users/vqeqdOxkUck

I think a tool on google on spreadsheet exists that can interpolate the points into an equation.  That equation is what gets into source code of golden cheetah.

Do you know what is the form of that equation?  Have you found it in golden cheetah source code? (for other trainers).

Alex

Le mardi 30 janvier 2018 21:08:11 UTC+1, Rui_B a écrit :

[Ale Martinez]

El miércoles, 31 de enero de 2018, 10:48:28 (UTC-3), Alexandre Petrescu escribió:

There is a discussion about how to add power curves there
https://groups.google.com/forum/#!topic/golden-cheetah-users/vqeqdOxkUck

I think a tool on google on spreadsheet exists that can interpolate the points into an equation.  That equation is what gets into source code of golden cheetah.

Do you know what is the form of that equation?  Have you found it in golden cheetah source code? (for other trainers).

For most of the current supported trainers the equation is a polynomial and for the others a power law; https://github.com/GoldenCheetah/GoldenCheetah/blob/d734f1c485ee0e09a273ddb119b9290fb4a23c68/src/Train/RealtimeController.cpp#L54, this is the changet for the last one added: https://github.com/GoldenCheetah/GoldenCheetah/commit/405b6f22d5bd6fd662876d3b58a3216a8887abe1#diff-5f2f4e4603991ee729ae4059004f75e6

[Alexandre Petrescu]

Wonderful github means I can submit a modif if I wanted to.

But how can I calculate the polynomial or the power law for Elite Quick-Motion numbers?

Once I have that polynomial it should be really easy to submit.

Alex

[Ale Martinez]

El miércoles, 31 de enero de 2018, 11:31:22 (UTC-3), Alexandre Petrescu escribió:

Wonderful github means I can submit a modif if I wanted to.

Right, the preferred way to contribute is via Pull Request, see the contribution guidelines in the repository for more information 

But how can I calculate the polynomial or the power law for Elite Quick-Motion numbers?

A simple way is to use the Trendline feature of Excel/LibreOffice/Google Sheets/etc. to fit the data points to a polinomial of a choosen degree and display the equation. 

[John Kirk]

Hi.. I use these rollers.

Did any code materialise that I could insert to test out ???

thanks 

[Ale Martinez (Please don't email or cc me)]

Not that I know, the change is not difficult, but it requires a new build.

For immediate use you could look at the curves for the currently supported trainers, here are a bunch of them http://www.powercurvesensor.com/cycling-trainer-power-curves/, and find one similar to your current setup.

[Alexandru Petrescu]

Hi,
Not on my side. Since then I actually went the reverse direction: use
least electronics. I just use a watch and measure time, and time slots.

I also removed the bluetooth/ant pod from the rollers.

I still learn how to correctly ride on the rollers with least
distraction. The only distraction is radio listening.

TV watching (various trials: concert, news, landscape, sports, tour de
france), RGT simulator watching, and watching numbers on screens really
distracts me while on rollers, and made me fall on a number of occasions.

Once I control perfectly the roller riding, I might try again to use
screens.

Alex, LF/HF 1

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[John Kirk]

Thanks for the response :) 

I really don't like turbo's so got used to rollers. I had been using trainer road on android which has this Elite E-motion roller entered into its database.

Could you recommend a turbo in the GC list that may have a suitable power curve ?

thanks.

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[Ale Martinez (Please don't email or cc me)]

El sábado, 4 de abril de 2020, 7:35:17 (UTC-3), John Kirk escribió:

Thanks for the response :) 

I really don't like turbo's so got used to rollers. I had been using trainer road on android which has this Elite E-motion roller entered into its database.

Could you recommend a turbo in the GC list that may have a suitable power curve ?

The last Trainer added to GC, the Tacx Magnetic T1820, has similar curves, in particular T1820 4/7 is almost identical to E-motion 2:

 

[John Kirk]

Many thanks once more !

Tacx Magnetic T1820 it shall be ! :) 

Looking forward to helping with GC feedback over the months/maybe years ahead.. 

I did testing and ui design/graphics for the Amiga port of delitracker as it changed to deliplayer on WinDo$e a long time ago.

[Eric Christoffersen]

Hi, im trying to validate a generic curve fitter. Would you be willing to make and share a ride with velocity spindowns? Just speedup to max speed then coast. Do it a few times and share?

[John Kirk]

Sure... at the moment I have not set up a bike on the rollers yet.. just set up sensors and playing with GC's settings/imports etc.

I can do this over the next week though.. So.. 4/5 max effort spins saved to what format ?

[Eric Christoffersen]

Great!

Any format which holds datapoints with both time and speed. Fit, tcx, etc.

Bring the speed up high as you can, then let it coast to a stop. Might also be good to record spindowns when trainer is cold and again after a workout so everything is hot. This would show how power curve changes with heat, which is the value of caliberation.

What we get from spindown is the deceleration. Then must multiply by effective mass to compute watts. So detailed weights of systems spinny things would let me estimate watts. shape size and weight of flywheel and of rear wheel. Right now i just want to see a curve thats in the ballpark.

Advantage of this system is that user would just provide effective mass once, then curve can be computed on demand.

Thanks!

[John Kirk]

I have done my first couple of GC workouts.

The wattage appeared to be too easy to hit.

I have just double checked the model and I have the 'Elite E-motion' and not the 'Quick Motion'

After some digging to find out how similar my rollers are to the 'Quick Motion' as I am using the similar T1820 4/7 power curve I found some info on the Sufferfest site.

See image.

happy days

[John Kirk]

I still intend to do that spin down ride... not forgot