Acceleration without gravity

just a update:
tried simple trick by editing Accellog app by changing the "Bangle.setPollInterval(x)" value to 50 ms. First sample gets in around 50 ms, but rest of the values have around 100ms interval. I tried to disable layout updating, because maybe that takes too much time, but didn't help.
Maybe I need to go with accelrec app and modify it. Maybe it can't write to file so fast. I will continue to try different things.

you can throw for 30 minutes and end up with only like 10 seconds of actual data

True. Now I just want to collect data. If the writing to text file takes too much time, I can make it write only when there is a peak. Otherwise I will just update an array on the ram with new values. Lets see.