i have a rather nerdy question to all the axs quarq powermeter users:
do you usually en- or disable the autozero button in the axs app?
in the manual of the pm it says: “Auto Zero is disabled when Magic Zero is
enabled. Manual Zero is always enabled.” but in my sram app i can only choose to en- or disable “autozero” and not magiczero as it is written in the manual.
so: if i enable autozero in the app, which protocol will be used by the pm? magiczero or autozero?
We are not aware of any specific environments where MagicZero is inappropriate for use. However, it is still possible to turn off MagicZero and only use Manual Zero from the head unit. To do this, turn off AutoZero on your power meter from the SRAM AXS App.
Magiczero is just a continuous zero offset or tare. No need to do anything to enable it.
If you want to manual zero or a zero at that temp/time/alt etc… (backpedal or stop with feet off pedals and hit calibrate) turn off autozero in the app. I’m not sure why this even exists anymore but, it’s there…
New Quarq PM user. I just got off the phone with SRAM, and enabling AutoZero will enable MagicZero.
The reason I called was because last week during a 10 minute warmup I was cruising along at around 150W, then stopped for a light, and restarted and now my Garmin was showing power between 30-80W. So I stopped and force quit the AXS app on my iPhone and it went back to normal. But I was left wondering what really happened.
Well the Quarq support guy told me that AutoZero/MagicZero has an issue under these conditions:
you stop for a light or for any reason
unclip left foot
put pressure on right foot
AutoZero will attempt to do a zero calibration, but doesn’t know you are putting pressure on right foot
from that point until next AutoZero, the power will read low
For that reason I’m turning off AutoZero and will simply do a Zero Calibration before starting a ride.
oddly enough I usually unclip right foot, and last week when I stopped thought “hey I should get better at restarting using my other foot” Only had the Quarq for 2 weeks, so I’m happy to have sorted that out early rather than getting surprised/annoyed later
Talked about 10 different things with the support guy, I think they are working on a solution but if it matters to you then give them a call. Tech support guy was awesome.
I’ve just got a new bike with a SRAM Quarq powermeter fitted. I was hoping the MagicZero function would eliminate the need to manually zero, but it seems it might not! Anyone know if they resolved the unclipping left foot at stop-light issue?