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linuxcnc/nc_files/subs/frame_circ.ngc
Thaddeus Hughes ad1f8719d6 big overhaul
2026-04-05 20:51:43 -05:00

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; frame_circ - cuts along the perimeter of a circle (inside or outside).
; Lead-in arc capped at min(tool_radius, 15% of diameter, available_clearance).
; Requires globals: #<_z_top>, #<_z_bot>
; Requires tool loaded (uses #5410 for diameter)
; Optional global: #<_z_clearance>
o<frame_circ> sub
; o<frame_circ> call [mode] [x][y] [diameter] [fincut]
; #1=mode #2=x #3=y #4=diameter #5=fincut
#<M_CONVENTIONAL> = [FIX[#1/1] MOD 2 EQ 1]
#<M_OUTSIDE> = [FIX[#1/8] MOD 2 EQ 1]
#<M_CLIMB> = [FIX[#1/1] MOD 2 EQ 0]
#<M_INSIDE> = [FIX[#1/8] MOD 2 EQ 0]
G90
G90.1
M101
G17
#<td> = #5410
#<tr> = [#<td>/2]
o1 if [EXISTS[#<_z_clearance>]]
#<z_clearance> = #<_z_clearance>
o1 else
#<z_clearance> = #<_z_top>
o1 endif
; lead-in arc radius: capped at tool radius, 15% of pocket diameter,
; and available clearance between tool and pocket wall
#<r_entry> = #<tr>
o10 if [#<r_entry> GT [#4*0.15]]
#<r_entry> = [#4*0.15]
o10 endif
; for inside cuts, also cap to available radial clearance
o11 if [#<M_INSIDE>]
#<avail> = [[#4/2 - #<tr>] * 0.4]
o12 if [#<avail> LT #<r_entry>]
#<r_entry> = #<avail>
o12 endif
o11 endif
o13 if [#<r_entry> LT 0.001]
#<r_entry> = 0.001
o13 endif
G0 Z#<z_clearance>
o20 if [#<M_INSIDE> AND #<M_CONVENTIONAL>]
G0 X[#2-#<r_entry>] Y[#3 + #4/2 - #<tr> - #<r_entry>]
G0 Z#<_z_top>
G1 Z#<_z_bot>
G2 X#2 Y[#3 + #4/2 - #<tr>] I#2 J[#3 + #4/2 - #<tr> - #<r_entry>]
G2 X#2 Y[#3 + #4/2 - #<tr>] I#2 J#3
G2 X[#2+#<r_entry>] Y[#3 + #4/2 - #<tr> - #<r_entry>] I#2 J[#3 + #4/2 - #<tr> - #<r_entry>]
o20 elseif [#<M_INSIDE> AND #<M_CLIMB>]
G0 X[#2+#<r_entry>] Y[#3 + #4/2 - #<tr> - #<r_entry>]
G0 Z#<_z_top>
G1 Z#<_z_bot>
G3 X#2 Y[#3 + #4/2 - #<tr>] I#2 J[#3 + #4/2 - #<tr> - #<r_entry>]
G3 X#2 Y[#3 + #4/2 - #<tr>] I#2 J#3
G3 X[#2-#<r_entry>] Y[#3 + #4/2 - #<tr> - #<r_entry>] I#2 J[#3 + #4/2 - #<tr> - #<r_entry>]
o20 elseif [#<M_OUTSIDE> AND #<M_CONVENTIONAL>]
G0 X[#2+#<r_entry>] Y[#3 + #4/2 + #<tr> + #<r_entry>]
G0 Z#<_z_top>
G1 Z#<_z_bot>
G2 X#2 Y[#3 + #4/2 + #<tr>] I#2 J[#3 + #4/2 + #<tr> + #<r_entry>]
G3 X#2 Y[#3 + #4/2 + #<tr>] I#2 J#3
G2 X[#2-#<r_entry>] Y[#3 + #4/2 + #<tr>+ #<r_entry>] I#2 J[#3 + #4/2 + #<tr> + #<r_entry>]
o20 elseif [#<M_OUTSIDE> AND #<M_CLIMB>]
G0 X[#2-#<r_entry>] Y[#3 + #4/2 + #<tr> + #<r_entry>]
G0 Z#<_z_top>
G1 Z#<_z_bot>
G3 X#2 Y[#3 + #4/2 + #<tr>] I#2 J[#3 + #4/2 + #<tr> + #<r_entry>]
G2 X#2 Y[#3 + #4/2 + #<tr>] I#2 J#3
G3 X[#2+#<r_entry>] Y[#3 + #4/2 + #<tr>+ #<r_entry>] I#2 J[#3 + #4/2 + #<tr> + #<r_entry>]
o20 endif
G0 Z#<z_clearance>
o<frame_circ> endsub
M2