big overhaul

nc_files/subs/bore.ngc

@@ -0,0 +1,36 @@
+; bore - helical boring subroutine. Spirals down in full-circle passes,
+; then a partial-arc cleanup and a spring pass at final depth.
+; Requires globals: #<_z_top>, #<_z_bot>
+; Requires tool loaded (uses #5410 for diameter)
+o<bore> sub
+	; o<bore> call [x][y] [d] [stepdown]
+	; #1=x #2=y #3=d #4=stepdown
+
+	G90
+	G91.1
+
+	G0 X#1 Y#2
+	G0 Z#<_z_top>
+	G1 X[#1+#3/2-#5410/2] Y[#2]
+	G17
+
+	#<r> = [#3/2-#5410/2]
+
+	#<z> = [#<_z_top> - #4]
+	o101 while [#<z> GT #<_z_bot>]
+		G3 X[#1+#<r>] Y[#2] I[-#<r>] Z[#<z>] P1
+		#<z> = [#<z> - #4]
+	o101 endwhile
+
+	o102 if [#<_z_top> GT #<_z_bot>]
+		#<ang> = [[#<z>-#<_z_bot>]/#4*360]
+		G3 X[#1+COS[#<ang>]*#<r>] Y[#2+SIN[#<ang>]*#<r>] I[-#<r>] Z[#<_z_bot>]
+		G3 X[#1+COS[#<ang>]*#<r>] Y[#2+SIN[#<ang>]*#<r>] I[-COS[#<ang>]*#<r>] J[-SIN[#<ang>]*#<r>] Z[#<_z_bot>]
+	o102 endif
+
+	G0 X#1 Y#2
+	G0 Z0
+
+o<bore> endsub
+
+M2