Originally Posted by ro.bi.
How often would I have to do this?
Im asking because my ACC tilts differently every time I switch it on.
I calibrate every time I fly, then lift off and see if there is any drift in any direction then trim as needed. Normally once trim is set you don't need to do it again unless something is changed. It only takes a few seconds to set trims.
But I still calibrate with TX before each flight.