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(info: helix: in/out cutting, cw/ccw dir with radius comp, D-holes)
o<helix> sub
#<toolno> = #1 (=1)
#<rpm> = #2 (=2000)
#<feedrate> = #3 (=10)
#<dir> = #4 (=3 2:cw, 3:ccw)
#<inside> = #5 (=1 1:in, 0:out)
#<cutdepth> = #6 (z cutdepth)
#<zincr> = #7 (z increment)
#<zsafe> = #8 (=0.5)
#<x> = #9 (x center)
#<y> = #10 (y center)
#<hdiam> = #11 (diameter)
#<faceangle> = #12 (=0 face angle)
#<d_angle> = #13 (=0 d angle)
#<zstart> = #14 (=0)
#<spin_notify>= #15 (=0)
#<use_g43> = #16 (=1)
#<h_for_g43> = #17 (=0)
#<verbose> = #18 (=0)
o<loadtool> call [#<toolno>][#<use_g43>][#<h_for_g43>][#<verbose>]
#<tooldiam> = [#5410 + .001]
#<hr> = [#<hdiam>/2]
#<cutdepth> = [-1 * #<cutdepth>]
o<l00> if [#<cutdepth> GT 0.0]
(debug, helix: bad cutdepth #<cutdepth> - EXITING)
(print, helix: bad cutdepth #<cutdepth> - EXITING)
(AXIS,notify, helix: bad cutdepth - EXITING)
m2
o<l00> endif
#<zincr> = [-1 * #<zincr>]
o<l01> if [#<zincr> GT 0.0]
(debug, helix: bad zincr #<zincr> - EXITING)
(print, helix: bad zincr #<zincr> - EXITING)
(AXIS,notify, helix: bad zincr - EXITING)
m2
o<l01> endif
o<l02> if [[#<inside> NE 0] AND [#<inside> NE 1]]
(debug, helix: bad inside specifier #<inside> - EXITING)
(print, helix: bad inside specifier #<inside> - EXITING)
(AXIS,notify, helix: bad inside specifier - EXITING)
m2
o<l02> endif
o<l03> if [[#<dir> NE 2] AND [#<dir> NE 3]]
(debug, helix: bad dir specifier #<dir> - EXITING)
(print, helix: bad dir specifier #<dir> - EXITING)
(AXIS,notify, helix: bad dir specifier - EXITING)
m2
o<l03> endif
#<rtool> = [#<tooldiam> / 2.0]
G40 (cutter radius compensation off)
s#<rpm> m3 (spindle cw)
o<if1> if [#<spin_notify> GT 0]
o<spin> call [#<rpm>]
o<if1> endif
f #<feedrate>
#<delta> = #<d_angle>
#<d2> = [#<d_angle>/2]
(to avoid gouging, start point is arc opposite flat)
(start point x0,y0 and vector to center vx0,vy0)
#<x0> = [#<x> + #<hr> * cos[#<faceangle> + 180]]
#<y0> = [#<y> + #<hr> * sin[#<faceangle> + 180]]
#<vx0> = [#<hr> * cos[#<faceangle>]]
#<vy0> = [#<hr> * sin[#<faceangle>]]
o<entry> call [#<inside>][#<dir>][#<tooldiam>][#<x0>][#<y0>][#<x>][#<y>]
#<prex> = #<_entry:prex> (pre entry point)
#<prey> = #<_entry:prey>
#<vxe> = #<_entry:vx> (vector to arc center)
#<vye> = #<_entry:vy>
(points at the ends of the arc)
(x1,y1 start point of flat, vx1,vy1 vector to center)
(x2,y2 start point of flat, vx2,vy2 vector to center)
o<l08> if [#<dir> eq 2] (cw)
#<x1> = [#<x> + #<hr> * cos[#<faceangle> + #<d2>]]
#<y1> = [#<y> + #<hr> * sin[#<faceangle> + #<d2>]]
#<vx1> = [#<hr> * cos[#<faceangle> + #<d2> + 180]]
#<vy1> = [#<hr> * sin[#<faceangle> + #<d2> + 180]]
#<x2> = [#<x> + #<hr> * cos[#<faceangle> - #<d2>]]
#<y2> = [#<y> + #<hr> * sin[#<faceangle> - #<d2>]]
#<vx2> = [#<hr> * cos[#<faceangle> - #<d2> + 180]]
#<vy2> = [#<hr> * sin[#<faceangle> - #<d2> + 180]]
o<l08> else
#<x2> = [#<x> + #<hr> * cos[#<faceangle> + #<d2>]]
#<y2> = [#<y> + #<hr> * sin[#<faceangle> + #<d2>]]
#<vx2> = [#<hr> * cos[#<faceangle> + #<d2> + 180]]
#<vy2> = [#<hr> * sin[#<faceangle> + #<d2> + 180]]
#<x1> = [#<x> + #<hr> * cos[#<faceangle> - #<d2>]]
#<y1> = [#<y> + #<hr> * sin[#<faceangle> - #<d2>]]
#<vx1> = [#<hr> * cos[#<faceangle> - #<d2> + 180]]
#<vy1> = [#<hr> * sin[#<faceangle> - #<d2> + 180]]
o<l08> endif
g0 z #<zsafe>
o<l10> if [#<inside> NE 0] (inside)
o<l20> if [#<dir> eq 2] (cw)
(debug conventional CW,INSIDE)
g0 x#<prex> y#<prey> z #<zsafe>
/ g42 (cutter radius comp right of path)
g2 x#<x0> y#<y0> i#<vxe> j#<vye>
o<l20> else (ccw)
(debug climb CCW,INSIDE)
g0 x#<prex> y#<prey> z #<zsafe>
/ g41 (cutter radius comp left of path)
g3 x#<x0> y#<y0> i#<vxe> j#<vye>
o<l20> endif
o<l10> else (outside)
o<l30> if [#<dir> eq 2] (2 ==> cw)
(debug,climb CW,OUTSIDE)
g0 x#<prex> y#<prey> z #<zsafe>
/ g41 (cutter radius comp left of path)
g3 x#<x0> y#<y0> i#<vxe> j#<vye>
o<l30> else (3 ==> ccw)
(debug conventional CCW,OUTSIDE)
g0 x#<prex> y#<prey> z #<zsafe>
/ g42 (cutter radius comp right of path)
g2 x#<x0> y#<y0> i#<vxe> j#<vye>
o<l30> endif
o<l10> endif
(entry complete: #<x0>,#<y0>,#<zsafe>)
g0 z [#<zstart> + 0.05] (hardcoded delta)
g1 z #<zstart> (plunge)
#<zcurrent> = #<zstart>
#<_:pass> = 1 (colon makes hidden global var)
o<l30> while [#<zcurrent> GT #<cutdepth>]
#<zcurrent> = [#<zcurrent> + #<zincr>]
o<l32> if [#<zcurrent> LT #<cutdepth>]
#<zcurrent> = #<cutdepth>
o<l32> endif
g#<dir> x#<x1> y#<y1> i#<vx0> j#<vy0> z#<zcurrent>
g1 x#<x2> y#<y2>
g#<dir> x#<x0> y#<y0> i#<vx2> j#<vy2> z#<zcurrent>
#<_:pass> = [#<_:pass> + 1]
o<l30> endwhile
(final traverse at full depth)
g#<dir> x#<x1> y#<y1> i#<vx0> j#<vy0> z#<zcurrent>
g1 x#<x2> y#<y2>
g#<dir> x#<x0> y#<y0> i#<vx2> j#<vy2> z#<zcurrent>
g0 z#<zsafe>
g40
o<helix> endsub
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