Heating & Cooling of hot end for calibrating nozzle height?

[JetForMe]

The procedure for adjusting the nozzle height requires each nozzle to be heated before it can be moved into the downward position, at which point it's just cooled again.

Is it really necessary to heat it just to move it? This adds a LOT of time to the calibration procedure.

[ccclarke]

The heating function is a safety feature to prevent hardware damage.

If there is any accumulation of cooled filament in the hot end, when the servo switches to move the hot ends, you could end up with a damaged switching mechanism. By heating both up, the hot ends have no resistance to melted filament.