Hi @Rabin
You can follow the information that Ivan posted above .
To test out if your MINI 2 needs really calibration is easy , just use the marker mode and use markers on the turntable , if all markers turn red while rotating and you don’t get any errors on the real time screen , the calibration is still just fine .
You should not calibrate your device unless you have specific issues with it
Marker mode don’t works correctly is the first indicator .
Lose tracking while scanning is not related to calibration issues but to not enough features , MINI 2 have a very small FOV that needs lots of features to keep tracking , remember this …
The Calibration feature in Revo Scan 5 computer version will tell you if you need calibration or not .