| -rw-r--r-- | another.scad | 33 |
1 files changed, 18 insertions, 15 deletions
diff --git a/another.scad b/another.scad index f4e8904..23243d9 100644 --- a/another.scad +++ b/another.scad @@ -83,24 +83,33 @@ module the_extruder( ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); spring_dl = idler_travel*longwing/ri; mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; ls_z = filament_elevation; // leverspace mid-z ls_h = lever_thickness+lever_v_clearance; // leverspace height mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); echo("mount depth",mount_depth); + module teardrop(r,d,h,center=false,angle=45) { + dd = d ? d : (2*r); + $fn = dd*fnd; + cylinder(d=dd,h=h,center=center); + if(angle>0) translate([0,0,center?-h/2:0]) + rotate([0,0,angle]) + cube(size=[d/2,d/2,h]); + } + module mirrorleft() { mirror([left?0:1,0,0]) children(); } module place_idler() { rotate([0,0,45]) translate([(pulley_d+idler_d)/2,0,0]) children(); } module finger_indent(d=lever_thickness,depth/*=1*/,r/*=15*/) { if(depth) { hh = (-4*pow(depth,2)+pow(d,2))/(8*depth); rr = depth+hh; @@ -155,42 +164,39 @@ module the_extruder( translate([mount_d/2,0,0]) cylinder(d=lsd,h=lever_thickness,center=true,$fn=60); }//hull hull() { translate([mount_d/2,0,0]) cylinder(d=lsd,h=lever_thickness,center=true,$fn=60); translate([mount_d/2,-longwing,0]) rotate([0,90,0]) cylinder(d=lever_thickness,h=lsd,center=true,$fn=60); }//hull }//union // filament path - place_idler() { - translate([-idler_d/2-idler_filament_offset,0,0]) rotate([90,0,0]) { - cylinder(d=filament_path_d,h=3*gearbox_d,center=true,$fn=30); - translate([0,-filament_path_d/2/sqrt(2),0]) rotate([0,0,45]) - cube(size=[filament_path_d/2,filament_path_d/2,3*gearbox_d],center=true); - }//rotate translate - translate([-idler_d/2-idler_filament_offset,0,0]) - rotate([90,0,0]) + place_idler() + translate([-idler_d/2-idler_filament_offset,0,0]) + rotate([90,0,0]) { + mirror([0,1,0]) + teardrop(d=filament_path_d,h=3*gearbox_d,center=true); translate([0,0, sqrt(2)*(mount_d-pulley_d+lsd)/2 ]) { cylinder(d1=filament_path_d,d2=2*filament_path_d, h=filament_path_d,$fn=2*filament_path_d*fnd); translate([0,0,filament_path_d-epsilon]) cylinder(d=2*filament_path_d,h=lsd,$fn=2*filament_path_d*fnd); - } - }//place_idler - + }//translate + }//rotate translate place_idler + // idler space and mounting hole place_idler() { difference() { cylinder(d=idler_d+idler_clearance*2,h=idler_h+idler_v_tolerance,center=true,$fn=60); if(supports) for(y=[-lsd/2+extrusion_width:(lsd-2*extrusion_width)/3:lsd/2-extrusion_width]) translate([-lsd/2-1,y-extrusion_width/2,-idler_h/2-idler_v_tolerance/2-1]) cube(size=[lsd+2,extrusion_width,idler_h+idler_v_tolerance+2]); } cylinder(d=idler_screw_d,h=lever_thickness+2,center=true,$fn=30); translate([0,0,lever_thickness/2-idler_screwhead_h]) cylinder(d=idler_screwhead_d,h=idler_screwhead_h+1,$fn=fnd*idler_screwhead_d); } @@ -301,28 +307,25 @@ module the_extruder( h=mount_screw_l-mount_depth+1, $fn=fnd*(mount_screw_d+mount_screw_d_tolerance)); translate([0,0,mount_screw_l-mount_depth]) cylinder(d=mount_screwhead_d,h=body_h+1,$fn=fnd*mount_screwhead_d); }//for // pushfit translate([0,0,filament_elevation]) rotate([0,0,45]) translate([pulley_d/2+filament_offset,0,0]) rotate([-90,0,0]) translate([0,0,mount_d/sqrt(2)/2+mount_screw_d+epsilon]) rotate([0,0,180]) { pushfit(pf); - cylinder(d=filament_guide_d,h=gearbox_d,center=true,$fn=fnd*filament_guide_d); - translate([0,-filament_guide_d/2/sqrt(2),0]) - rotate([0,0,45]) - cube(size=[filament_guide_d/2,filament_guide_d/2,gearbox_d],center=true); + mirror([0,1,0]) teardrop(d=filament_guide_d,h=gearbox_d,center=true); }//rotate translate rotate translate rotate translate // pulley cylinder(d=pulley_d+pulley_d_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_d_clearance)); // leverspace hull() for(x=[0,gearbox_d]) rotate([0,0,45]) translate([x,0,ls_z-ls_h/2]) cylinder(d=idler_d+idler_clearance,h=ls_h,$fn=fnd*(idler_d+idler_clearance)); // idler clearance a=cos(45)*(pulley_d+idler_d)/2; b=mount_d/2-a; |