-rw-r--r-- | another.scad | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/another.scad b/another.scad index 05bfab3..49833ec 100644 --- a/another.scad +++ b/another.scad @@ -22,96 +22,97 @@ module the_extruder( // idler properties idler_d = 10, idler_h = 4, idler_id = 3, // idler dimensions: outer and inner diameters and height // spring properties spring_d = 10, spring_lc = 9.6, // spring diameter and compressed length // 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_indent_d = 4, knob_indents = 12, knob_v_clearance = 1, // spring tensioner st_nut_d = 9, st_nut_h = 4, st_screw_d = 5, st_thickshell = 8*extrusion_width, st_thinshell = 2*extrusion_width, st_split_w = 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_metal, pf_shell = max(3*layer_height,3*extrusion_width), // empty spaces idler_travel = 3, // how far should idler travel when pressed idler_clearance=.5, pulley_small_d_clearance=.5, 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=.8, st_nut_h_tolerance=.2, st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */ st_screw_d_tolerance=.5, st_split_w_tolerance = .3, min_z_shell = 4*layer_height, // the very minimal shell thickness along z-axis. min_xy_shell = 2*extrusion_width, body_label = "another", body_label_thickness = layer_height, + knob_label = "another", knob_label_thickness = 2*layer_height, knob_label_size=undef, what="lever", // lever|body|knob|springpad|* left=false, vitamins = true, bridges = true, debug = false, ) { fnd = 2*PI; fnr = 2*fnd; function lu(m,k) = m[search([k],m)[0]][1]; pulley_d = lu(pulley,"d"); pulley_h = lu(pulley,"h"); teeth_elevation = lu(pulley,"fe"); filament_offset = lu(pulley,"g")+filament_d/2; pulley_d_clearance = lu(pulley,"ssrc")*2; idler_filament_offset = filament_path_d/2; 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; // the diameter of lever thingie longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+min_xy_shell; shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) sqrt(c*c+pow(a-c,2)); longwing_travel = idler_travel*longwing/shortwing; 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; // finger and spring support fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); 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); $fn = dd*fnd; cylinder(d=dd,h=h,center=center); if(angle>0) translate([0,0,center?-h/2:0]) rotate([0,0,angle]) cube(size=[d/2,d/2,h]); } @@ -384,99 +385,112 @@ module the_extruder( smalld=st_screw_d+st_screw_d_tolerance+min_xy_shell; bigd = spring_d+spring_d_clearance/2; hf = (bigd-smalld)/2; h = hf*3.5; translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation]) rotate([0,90,0]) difference() { union() { cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd); translate([0,0,hf-epsilon]) cylinder(d=bigd,h=h-hf,$fn=fnd*bigd); translate([0,0,h]) sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); l = body_h-ls_z; w = st_split_w; hull() translate([0,-st_split_w/2,0]) mirror([1,0,0]) { translate([0,0,w]) cube(size=[l,st_split_w,w]); cube(size=[l-w,st_split_w,2*w]); } } translate([0,0,-epsilon]) cylinder(d=st_screw_d+st_screw_d_tolerance,h=2*hf+epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); } } module knob() { ch = knob_indent_d/2; knob_bore_l = body_h-protrusion_h-pulley_elevation-pulley_h-knob_v_clearance; translate([0,0,body_h+epsilon]) { mirror([0,0,1]) translate([0,0,-epsilon]) { difference() { cylinder(d=pulley_d,h=knob_bore_l,$fn=fnd*pulley_d); translate([0,0,-1]) difference() { cylinder(d=bore_d+knob_bore_d_tolerance,h=knob_bore_l+2); translate([-bore_d/2-1,bore_dd-bore_d/2+knob_bore_d_tolerance/2,-1]) cube([bore_d+2,bore_d/2,knob_bore_l+4]); } } } difference() { hull() { cylinder(d=gearbox_d-2*ch,h=knob_h,$fn=fnd*gearbox_d); translate([0,0,ch]) cylinder(d=gearbox_d,h=knob_h-2*ch,$fn=fnd*gearbox_d); } for(a=[0:360/knob_indents:359]) rotate([0,0,a]) translate([0,gearbox_d/2,-1]) cylinder(d=knob_indent_d,h=knob_h+2,$fn=fnd*knob_indent_d); + translate([0,0,-body_h-epsilon]) knob_label(); } } }//knob module + module knob_label() { + if(knob_label) { + ll = len(knob_label); + lsl = gearbox_d-knob_indent_d; + ts = knob_label_size?knob_label_size:min(lsl/ll,gearbox_d/4); + translate([0,0,body_h+epsilon+knob_h-knob_label_thickness]) + linear_extrude(height=knob_label_thickness+epsilon,convexity=64) + mirror([left?0:1,0]) + text(text=knob_label,size=ts,halign="center",valign="center",font="Arial Black"); + } + } module debug() { difference() { children(); if(debug) { // spring tensioner debug cutout translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) translate([0,-lever_thickness/2-1,-gearbox_d]) cube(size=[body_h/2+1,lever_thickness/2+1,gearbox_d+2]); // lever axis debug cutout translate([mount_d/2,0,-1]) rotate([0,0,-45]) cube(size=[gearbox_d-mount_d,gearbox_d-mount_d,body_h+knob_h+2]); // idler debug cutout translate([0,0,ls_z]) place_idler() rotate([0,0,-45]) translate([0,0,-lever_thickness/2-epsilon]) cube(size=[lsd*sqrt(2)/2+1,lsd*sqrt(2)/2+1, lever_thickness+2*epsilon]); // pushfit debug cutout place_idler() translate([-idler_d/2+filament_offset,0,ls_z]) cube(size=[gearbox_d/2,gearbox_d/2+pf_h(pf),body_h-ls_z+knob_h+1]); }//if debug }//difference } mirrorleft() debug() if(what=="lever") color("green",0.7) lever(); else if(what=="body") color("yellow",0.7) body(); else if(what=="body.label") color("brown",0.7) body_label(); else if(what=="knob") color("red",0.7) knob(); else if(what=="springpad") color("blue",0.7) springpad(); else if(what=="both") { color("green",0.7) lever(); color("yellow",0.7) body(); color("brown",0.7) body_label(); }else{ color("green",0.7) lever(); color("yellow",0.7) body(); color("red",0.7) knob(); + color("brown",0.7) knob_label(); color("blue",0.7) springpad(); } } the_extruder(what="*",left=false,debug=true); |