G28.2 Z0.	;save current z position into Register1.Z (value with Z doesn't matter)
G53 G38.2 Z-10.	;move down to z=-10., stop while sensor is pressed
;G10 L70 P1 Z#5490	;set current work position as Z=0 (with offset depends on tool sensor width) 
G28.5 Z0.	;come back to saved Z position in Register1.Z (value with Z doesn't matter)
