How does footpod autocalibrate?

I have connected a new footpod and went for a run. Calibration factor: 100,0 and auto-calibrate:YES.
The pace was off at the beginning, so I thought its because the calibration (It was set as speed source: always). After 2 km it started making me angry, as it still didn't calibrate. I switched to gps pace, and continued running. But after 13km run the calibration factor is still 100,0 which is definitely wrong. How and when will the calibration happen?

The autocalibrate happens after the run is saved. It will affect the next run.

I recommend instead
- Disabling the autocalibrate and have foot-pod distance set to indoor.
- Do a workout with auto-lap on.
- Download fellnr foot pod calibration tool.
- Download the fit file either from device or from connect. (Download original data)
- Select a lap with good GPS data (low variations of the GPS speed - blue)
This means straight, near you race speed where you would like it to be accurate and few trees or houses.
- Insert current Calibration in tool. (multiplied with 10) (100 device = 1000 tool)
- Read calibration in tool and insert in device.

But after the run there is still 100,0 calibration factor? Will it calibrate only when speed is taken from gps? I hoped I would use it daily and it will continually calibrate?

But after the run there is still 100,0 calibration factor? Will it calibrate only when speed is taken from gps? I hoped I would use it daily and it will continually calibrate?

No, it also calibrates with speed=always, distance=indoor. I never tried distance=always because with this, my run logs the wrong distance.

Are you sure that your foot pod is connected?
Did the running shoe stop blinking before you start? (Same as the symbols for Heart rate, GPS and telephone before starting an activity)

You can test the connectivity by chosing an extremly wrong setting like 80.0 for the foot pod. You should see a pace far off then...

my footpod autocalibrated after my very first run (only after the run, not during) and then continued to make small adjustments after subsequent runs. it still occasionally subtly shifts my calibration if my pace tends to pick up as the running season goes on for example.

my footpod autocalibrated after my very first run (only after the run, not during) and then continued to make small adjustments after subsequent runs. it still occasionally subtly shifts my calibration if my pace tends to pick up as the running season goes on for example.

I don't "get" the auto calibration. If the pod automatically calibrates whenever it feels like it, that must mean it caliberates against the GPS distances. Does that not mean that if you run a route with bad GPS reception, the foot pod will calibrate against this poor date, and thus give bad results on the next run?

Does that not mean that if you run a route with bad GPS reception, the foot pod will calibrate against this poor date, and thus give bad results on the next run?

Yes it does. Which is why you should look at the calibration factor in the sensor settings after a run in good GPS conditions and take a note of it. When you are happy the calibration factor was reliably calculated during a run in in good GPS conditions, you should switch the auto calibrate to Off so it doesn't get inappropriately recalculated in a later run with poor GPS reception.

Yes it does. Which is why you should look at the calibration factor in the sensor settings after a run in good GPS conditions and take a note of it. When you are happy the calibration factor was reliably calculated during a run in in good GPS conditions, you should switch the auto calibrate to Off so it doesn't get inappropriately recalculated in a later run with poor GPS reception.

Makes sense. Thank you for confirming.

did another run with footpod. AutoCalibrate Enabled. Calibration factor still 100.0

The autocalibrate happens after the run is saved. It will affect the next run.

I recommend instead
- Disabling the autocalibrate and have foot-pod distance set to indoor.
- Do a workout with auto-lap on.
- Download fellnr foot pod calibration tool.
- Download the fit file either from device or from connect. (Download original data)
- Select a lap with good GPS data (low variations of the GPS speed - blue)
This means straight, near you race speed where you would like it to be accurate and few trees or houses.
- Insert current Calibration in tool. (multiplied with 10) (100 device = 1000 tool)
- Read calibration in tool and insert in device.

I tried this, and unfortunately, for two separate occasions, the Fellner tool gave me two different values. I "split the difference", and the distance/speed is way off on treadmill.

I don't run, basically I walk usually at a speed of around 3.1 or so, but when I use the treadmill at the gym, they're consistently way under what the watch is reporting. For instance, if I go for 30 minutes, I usually will hit a pace of 19.3? min/mile. That is outside, with GPS tracking, flat mostly open course at a park near where I live. However, on the treadmill, (after the Fellner action above), using close to the same pace from what I can tell, I'm getting around 19.0 min/mile. Is this amount of variation normal? I'm wondering what I'm doing wrong, I did try to calibrate my Forerunner 935 at a measured indoor track, and I had it fairly close, but then I returned it and got the F5. The calibration factor for the F935 didn't work so well on the F5 though, for whatever reason. I'm using a MiCoach BTLE footpod, and am wondering if it would be better if I went to the Garmin Foot Pod.