ESC calibration with herelink controller

I need to calibrate ESCs on my orange cube with herelink controller, but where can i see the exactly procedure with controllers with springs on the throttle stick? It starts from the middle point wich is 50%!

I would use the automatic configuration provided by Arducoptet itself. If you set the ESC_CALIBRATION parameter to 3 and reconnect the battery the autopilot will perform a calibration on its own.

You also need to set the pwm output to a fixed range. I recommend to use Mission Planner, there you can do all the stuff at once.