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?
  • It doesn't appear to calibrate if you are wearing a heart rate monitor. Were you wearing one?

    Really? I can't believe it! Yes, I always wear an ANT+ HRM... Than this is definitely a bug. Did you report it to Garmin?
  • Really? I can't believe it! Yes, I always wear an ANT+ HRM... Than this is definitely a bug. Did you report it to Garmin?


    Try it yourself and let us know. I think the reason is because when the HRM is paired its sensors take priority over the ones in the footpod so the footpod isn't used for things like cadence.
  • I will try, but it is not as it was working on 920XT. I use my HRM for 3 years and the autocalibration worked correctly on 920. So it is definitely a bug, if it works like this...
  • Try it yourself and let us know. I think the reason is because when the HRM is paired its sensors take priority over the ones in the footpod so the footpod isn't used for things like cadence.


    I think the assumption here is that the person is wearing the HRM-Run heart rate chest strap. If you're wearing another older Garmin, Wahoo, or other BTLE heart rate strap, there is no cadence to confuse.
  • Well, DUH!

    I think I may have discovered why I'm having such a time trying to calibrate my footpod in the Fenix, but didn't with the Suunto. A long time ago, I believe it was with a fenix 3, there is a section in the Garmin user profile about a "custom stride length". I did this, counted the number of steps for a given distance, and it came up with a custom stride length of (845 feet)+400 steps=2.113 feet. I think this is overriding anything that the watch tries to set with the footpod, as I've read that the GC profile takes precedence over the watch's settings. Ummm DUH! I'll turn this off, and let's see what happens. Today, I moved the calibration factor down two full points, (from 96.4 to 92.0) and it only made .1 difference in the distance on a 1/4 mile on the treadmill. I simply couldn't believe that was true.
  • I think the assumption here is that the person is wearing the HRM-Run heart rate chest strap. If you're wearing another older Garmin, Wahoo, or other BTLE heart rate strap, there is no cadence to confuse.


    Thats not fully truth, as even with HRM (yes, I have HRM-Run) if speed set to "always" on footpod, the pace is taken from footpod. Cadence, maybe from strap. Anyway, it worked well on 920 with the same configuration. I always run with HRM-Run, as I don't trust optical HR.
    I sent a ticket to garmin support anyway.
  • I think I may have discovered why I'm having such a time trying to calibrate my footpod in the Fenix, but didn't with the Suunto. A long time ago, I believe it was with a fenix 3, there is a section in the Garmin user profile about a "custom stride length". I did this, counted the number of steps for a given distance, and it came up with a custom stride length of (845 feet)+400 steps=2.113 feet. I think this is overriding anything that the watch tries to set with the footpod, as I've read that the GC profile takes precedence over the watch's settings. Ummm DUH! I'll turn this off, and let's see what happens. Today, I moved the calibration factor down two full points, (from 96.4 to 92.0) and it only made .1 difference in the distance on a 1/4 mile on the treadmill. I simply couldn't believe that was true.


    Oh my! That would explain, why my Garmin footpod never calibrated, too!

    In the GC app, it says that the stride length is only for walking! *hmpf*