|  (ROGGRAM BY Shangshan_Houde) 
	O0001 
	#1=30 (hole diameter) 
	#2=20 (hole depth) 
	#3=20 (Tool diameter) 
	#4=0(Z coordinate) 
	#5=1 (cutting depth of each layer) 
	#6=[#1-#3]/2 (Turning diameter of tool center) S2000 M03 
	G54 G90 G00 X0 Y0 Z50. 
	G0X#6 (G0 quickly moves above the lower tool point) 
	Z[-#4+1] (G0 drops to 1. at Z-#4 surface, namely at Z1.) 
	G1Z-#4F200. (G1 in the Z direction drops to the current starting processing depth Z-#4) 
	WHILE[#4LT#2]DO1 (when processing depth #4 is less than hole depth #2, cycle program 1) 
	#4=#4+#5 (cutting depth of each layer) 
	G3I-#6Z-#4F500. (G03 counterclockwise spiral processing to the next layer) 
	END1 (End of loop 1) 
	G3I-#6 (reach the depth of the hole, G03 walks the whole circle counterclockwise) 
	G1X[#6-1] (G01 returns 1 to the center, ie retracts the tool) 
	G0Z50. 
	M30 | 
 
 
