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jacho |
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/* |
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* polyScrewThread_r1.scad by aubenc @ Thingiverse |
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* |
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* This script contains the library modules that can be used to generate |
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* threaded rods, screws and nuts. |
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* |
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* http://www.thingiverse.com/thing:8796 |
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* |
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* CC Public Domain |
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*/ |
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module screw_thread(od,st,lf0,lt,rs,cs) |
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{ |
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or=od/2; |
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ir=or-st/2*cos(lf0)/sin(lf0); |
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pf=2*PI*or; |
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sn=floor(pf/rs); |
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lfxy=360/sn; |
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ttn=round(lt/st+1); |
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zt=st/sn; |
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intersection() |
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{ |
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if (cs >= -1) |
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{ |
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thread_shape(cs,lt,or,ir,sn,st); |
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} |
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full_thread(ttn,st,sn,zt,lfxy,or,ir); |
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} |
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} |
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module hex_nut(df,hg,sth,clf,cod,crs) |
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{ |
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difference() |
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{ |
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hex_head(hg,df); |
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hex_countersink_ends(sth/2,cod,clf,crs,hg); |
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screw_thread(cod,sth,clf,hg,crs,-2); |
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} |
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} |
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module hex_screw(od,st,lf0,lt,rs,cs,df,hg,ntl,ntd) |
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{ |
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ntr=od/2-(st/2)*cos(lf0)/sin(lf0); |
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union() |
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{ |
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hex_head(hg,df); |
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translate([0,0,hg]) |
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if ( ntl == 0 ) |
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{ |
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cylinder(h=0.01, r=ntr, center=true); |
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} |
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else |
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{ |
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if ( ntd == -1 ) |
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{ |
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cylinder(h=ntl+0.01, r=ntr, $fn=floor(od*PI/rs), center=false); |
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} |
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else if ( ntd == 0 ) |
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{ |
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union() |
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{ |
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cylinder(h=ntl-st/2, |
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r=od/2, $fn=floor(od*PI/rs), center=false); |
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translate([0,0,ntl-st/2]) |
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cylinder(h=st/2, |
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r1=od/2, r2=ntr, |
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$fn=floor(od*PI/rs), center=false); |
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} |
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} |
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else |
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{ |
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cylinder(h=ntl, r=ntd/2, $fn=ntd*PI/rs, center=false); |
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} |
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} |
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translate([0,0,ntl+hg]) screw_thread(od,st,lf0,lt,rs,cs); |
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} |
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} |
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module hex_screw_0(od,st,lf0,lt,rs,cs,df,hg,ntl,ntd) |
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{ |
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ntr=od/2-(st/2)*cos(lf0)/sin(lf0); |
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union() |
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{ |
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hex_head_0(hg,df); |
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translate([0,0,hg]) |
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if ( ntl == 0 ) |
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{ |
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cylinder(h=0.01, r=ntr, center=true); |
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} |
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else |
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{ |
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if ( ntd == -1 ) |
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{ |
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cylinder(h=ntl+0.01, r=ntr, $fn=floor(od*PI/rs), center=false); |
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} |
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else if ( ntd == 0 ) |
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{ |
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union() |
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{ |
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cylinder(h=ntl-st/2, |
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r=od/2, $fn=floor(od*PI/rs), center=false); |
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translate([0,0,ntl-st/2]) |
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cylinder(h=st/2, |
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r1=od/2, r2=ntr, |
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$fn=floor(od*PI/rs), center=false); |
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} |
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} |
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else |
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{ |
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cylinder(h=ntl, r=ntd/2, $fn=ntd*PI/rs, center=false); |
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} |
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} |
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translate([0,0,ntl+hg]) screw_thread(od,st,lf0,lt,rs,cs); |
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} |
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} |
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module thread_shape(cs,lt,or,ir,sn,st) |
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{ |
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if ( cs == 0 ) |
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{ |
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cylinder(h=lt, r=or, $fn=sn, center=false); |
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} |
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else |
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{ |
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union() |
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{ |
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translate([0,0,st/2]) |
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cylinder(h=lt-st+0.005, r=or, $fn=sn, center=false); |
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if ( cs == -1 || cs == 2 ) |
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{ |
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cylinder(h=st/2, r1=ir, r2=or, $fn=sn, center=false); |
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} |
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else |
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{ |
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cylinder(h=st/2, r=or, $fn=sn, center=false); |
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} |
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translate([0,0,lt-st/2]) |
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if ( cs == 1 || cs == 2 ) |
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{ |
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cylinder(h=st/2, r1=or, r2=ir, $fn=sn, center=false); |
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} |
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else |
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{ |
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cylinder(h=st/2, r=or, $fn=sn, center=false); |
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} |
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} |
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} |
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} |
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module full_thread(ttn,st,sn,zt,lfxy,or,ir) |
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{ |
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if(ir >= 0.2) |
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{ |
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for(i=[0:ttn-1]) |
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{ |
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for(j=[0:sn-1]) |
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assign( pt = [ [0, 0, i*st-st ], |
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[ir*cos(j*lfxy), ir*sin(j*lfxy), i*st+j*zt-st ], |
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[ir*cos((j+1)*lfxy), ir*sin((j+1)*lfxy), i*st+(j+1)*zt-st ], |
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[0,0,i*st], |
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[or*cos(j*lfxy), or*sin(j*lfxy), i*st+j*zt-st/2 ], |
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[or*cos((j+1)*lfxy), or*sin((j+1)*lfxy), i*st+(j+1)*zt-st/2 ], |
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[ir*cos(j*lfxy), ir*sin(j*lfxy), i*st+j*zt ], |
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[ir*cos((j+1)*lfxy), ir*sin((j+1)*lfxy), i*st+(j+1)*zt ], |
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[0, 0, i*st+st ] ]) |
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{ |
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polyhedron(points=pt, |
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triangles=[ [1,0,3],[1,3,6],[6,3,8],[1,6,4], |
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[0,1,2],[1,4,2],[2,4,5],[5,4,6],[5,6,7],[7,6,8], |
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[7,8,3],[0,2,3],[3,2,7],[7,2,5] ]); |
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} |
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} |
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} |
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else |
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{ |
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echo("Step Degrees too agresive, the thread will not be made!!"); |
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echo("Try to increase de value for the degrees and/or..."); |
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echo(" decrease the pitch value and/or..."); |
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echo(" increase the outer diameter value."); |
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} |
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} |
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module hex_head(hg,df) |
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{ |
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rd0=df/2/sin(60); |
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x0=0; x1=df/2; x2=x1+hg/2; |
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y0=0; y1=hg/2; y2=hg; |
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intersection() |
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{ |
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cylinder(h=hg, r=rd0, $fn=6, center=false); |
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rotate_extrude(convexity=10, $fn=6*round(df*PI/6/0.5)) |
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polygon([ [x0,y0],[x1,y0],[x2,y1],[x1,y2],[x0,y2] ]); |
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} |
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} |
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module hex_head_0(hg,df) |
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{ |
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cylinder(h=hg, r=df/2/sin(60), $fn=6, center=false); |
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} |
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module hex_countersink_ends(chg,cod,clf,crs,hg) |
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{ |
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translate([0,0,-0.1]) |
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cylinder(h=chg+0.01, |
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r1=cod/2, |
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r2=cod/2-(chg+0.1)*cos(clf)/sin(clf), |
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$fn=floor(cod*PI/crs), center=false); |
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translate([0,0,hg-chg+0.1]) |
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cylinder(h=chg+0.01, |
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r1=cod/2-(chg+0.1)*cos(clf)/sin(clf), |
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r2=cod/2, |
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$fn=floor(cod*PI/crs), center=false); |
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} |
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