| -rw-r--r-- | another.scad | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/another.scad b/another.scad index a93d21a..50b3a84 100644 --- a/another.scad +++ b/another.scad @@ -26,184 +26,189 @@ module the_extruder( // filament path properties filament_d = 1.75, filament_path_d = 2, filament_guide_d = 4, // PTFE filament guide diameter // knob properties knob_h = 10, knob_bore_l = 4, knob_indent_d = 4, knob_indents = 12, // spring tensioner st_nut_d = 9, st_nut_h = 4, st_screw_d = 5, st_thickshell = 8*extrusion_width, st_thinshell = 4*extrusion_width, // screw it mount_screw_d = 3.1, mount_screw_l = 20, mount_screwhead_d=6, mount_screwhead_h=3, idler_screw_d = 3, idler_screwhead_d=6, idler_screwhead_h=3, pf = pushfit_embeddest, pf_shell = max(3*layer_height,3*extrusion_width), pf_smooth = true, // empty spaces idler_travel = 3, // how far should idler travel when pressed idler_clearance=1, pulley_clearance=2, lever_v_clearance=.7, // vertical clearance for the lever spring_d_clearance=1, protrusion_tolerance_h=.5, // horizontal tolerance for the motor protrusion protrusion_tolerance_v=.5, // vertical tolerance for the motor protrusion mount_screw_d_tolerance=.4, idler_v_tolerance=.5, knob_bore_d_tolerance=.6, st_nut_h_tolerance=.2, st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */ st_screw_d_tolerance=.5, what="lever", // lever|body|knob|springpad|* left=false, vitamins = true, supports = false, bridges = true, tensioner = true, debug = false ) { fnd = 2*PI; fnr = 2*fnd; + idler_filament_offset = filament_path_d/2; // -filament_offset; lever_shell = mount_screwhead_h+0.5; lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); lsd = idler_d-idler_clearance*2; longwing=gearbox_d/2+spring_d/2+lsd/2; h_ = (pulley_d+idler_d)/(2*sqrt(2)); ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); spring_dl = idler_travel*longwing/ri; filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; ls_z = filament_elevation; // leverspace mid-z body_h = max(protrusion_h+bore_l,mount_screw_l-mounthole_depth/2+mount_screwhead_h,ls_z*2); ls_h = lever_thickness+lever_v_clearance; // leverspace height 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; translate([0,0,hh]) sphere(r=rr,$fn=fnr*rr); }else if(r) { hh=sqrt(pow(r,2)-pow(d,2)/4); translate([0,0,hh]) sphere(r=r,$fn=fnr*r); } } % if(vitamins) mirrorleft() { translate([0,0,-epsilon]) mirror([0,0,1]) cylinder(d=gearbox_d,h=1,$fn=60); for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0]) cylinder(d=mount_screw_d,h=20,$fn=30); translate([0,0,-epsilon]) cylinder(d=protrusion_d,h=protrusion_h,$fn=30); translate([0,0,protrusion_h]) { difference() { cylinder(d=bore_d,h=bore_l,$fn=30); translate([-bore_d/2-1,bore_dd-bore_d/2,-1]) cube([bore_d+2,bore_d/2,bore_l+2]); } translate([0,0,pulley_elevation]) { cylinder(d=pulley_d,h=pulley_h,$fn=30); translate([0,0,teeth_elevation]) { place_idler() { cylinder(d=idler_d,h=idler_h,center=true,$fn=30); cylinder(d=idler_screw_d,h=lever_thickness+2,center=true,$fn=30); }//place idler // filament path - rotate([0,0,45]) translate([pulley_d/2+filament_offset,0,0]) { - rotate([90,0,0]) cylinder(d=filament_d,h=gearbox_d*2,center=true,$fn=15); - rotate([-90,0,0]) - translate([0,0,mount_d/sqrt(2)/2+mount_screw_d]) - pushfit(pf); - } + rotate([0,0,45]) { + translate([pulley_d/2-idler_filament_offset,0,0]) rotate([90,0,0]) { + cylinder(d=filament_d,h=gearbox_d,center=false,$fn=15); + }//rotate translate + translate([pulley_d/2+filament_offset,0,0]) rotate([-90,0,0]) { + cylinder(d=filament_d,h=gearbox_d,center=false,$fn=15); + translate([0,0,mount_d/sqrt(2)/2+mount_screw_d]) + pushfit(pf); + }//rotate translate + }//rotate }//translate teeth }//translate pulley }//translate protrusion }//vitamins module lever() { translate([0,0,protrusion_h+pulley_elevation+teeth_elevation]) { difference() { union() { hull() { place_idler() cylinder(d=lsd,h=lever_thickness,center=true,$fn=60); translate([mount_d/2,0,0]) cylinder(d=lsd,h=lever_thickness,center=true,$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+filament_offset,0,0]) rotate([90,0,0]) { + translate([-idler_d/2-idler_filament_offset,0,0]) rotate([90,0,0]) { cylinder(d=filament_path_d,h=3*gearbox_d,center=true,$fn=30); translate([0,-filament_path_d/2/sqrt(2),0]) rotate([0,0,45]) cube(size=[filament_path_d/2,filament_path_d/2,3*gearbox_d],center=true); }//rotate translate - translate([-idler_d/2+filament_offset,0,0]) + translate([-idler_d/2-idler_filament_offset,0,0]) rotate([90,0,0]) translate([0,0, sqrt(2)*(mount_d-pulley_d+lsd)/2 ]) { cylinder(d1=filament_path_d,d2=2*filament_path_d, h=filament_path_d,$fn=2*filament_path_d*fnd); translate([0,0,filament_path_d-epsilon]) cylinder(d=2*filament_path_d,h=lsd,$fn=2*filament_path_d*fnd); } }//place_idler // idler space and mounting hole place_idler() { difference() { cylinder(d=idler_d+idler_clearance*2,h=idler_h+idler_v_tolerance,center=true,$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); } // mounting screw hole translate([mount_d/2,0,0]) cylinder(d=mount_screw_d+mount_screw_d_tolerance,h=lever_thickness+2,center=true,$fn=fnd*mount_screw_d); // lever end translate([mount_d/2,0,0]) rotate([0,90,0]) { translate([0,-longwing,lsd/2]) finger_indent(d=lever_thickness-1,r=15); translate([0,-longwing,0]) mirror([0,0,1]) difference() { cylinder(d=spring_d+spring_d_clearance,h=lsd,$fn=fnd*(spring_d+spring_d_clearance)); sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); } }//rotate-translate }//difference // bridging patch if(bridges) place_idler() translate([0,0,lever_thickness/2-mount_screwhead_h]) mirror([0,0,1]) cylinder(d=mount_screwhead_d,h=layer_height); }//translate }//lever module module body() { difference() { |