| -rw-r--r-- | another.scad | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/another.scad b/another.scad index 92187c5..8ba0d58 100644 --- a/another.scad +++ b/another.scad @@ -1,182 +1,184 @@ draft=true; layer_height=0.2; extrusion_width=0.4; epsilon=0.01; $fs=0.0125; use <pushfittery.scad>; include <pushfit_data.scad>; include <pulley_data.scad>; module the_extruder( // motor properties gearbox_d = 36, mount_d = 28, // the distance between opposite mounting holes mounthole_depth = 5, mounthole_min_depth = 3, mounthole_max_depth = 4, protrusion_d = 22, protrusion_h = 2.2, // the dimensions of the protrusion on top of gearbox bore_d = 8, bore_l = 17.6, bore_dd = 7, // pulley properties pulley = pulley_e3d, pulley_elevation = 1, // pulley elevation above the protrusion // 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_screw_l = 16, 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; + sp_ch = st_split_w; + 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 width 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); pf_offset = mount_d/sqrt(2)/2+mount_screw_d/2+min_xy_shell; module teardrop(r,d,h,center=false,angle=45) { dd = d ? d : (2*r); $fn = dd*fnd; cylinder(d=dd,h=h,center=center); if(angle>0) translate([0,0,center?-h/2:0]) rotate([0,0,angle]) cube(size=[d/2,d/2,h]); } module mirrorleft() { mirror([left?0:1,0,0]) children(); } module place_idler() { rotate([0,0,45]) translate([(pulley_d+idler_d)/2,0,0]) children(); } module finger_indent(d=lever_thickness,depth/*=1*/,r/*=15*/) { if(depth) { hh = (-4*pow(depth,2)+pow(d,2))/(8*depth); rr = depth+hh; translate([0,0,hh]) sphere(r=rr,$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-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,pf_offset]) pushfit(pf); }//rotate translate }//rotate }//translate teeth }//translate pulley }//translate protrusion // spring tensioner screw translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,90,0]) cylinder(d=st_screw_d,h=st_screw_l); }//mirrorleft if(vitamins) module lever() { translate([0,0,protrusion_h+pulley_elevation+teeth_elevation]) { difference() { union() { hull() { @@ -265,235 +267,238 @@ module the_extruder( pfbd = pf_d(pf)+2*pf_shell; hull() { cylinder(d=pfbd,h=pfbl,$fn=pfbd*fnd); translate([-epsilon/2,0,0]) { cube(size=[epsilon,filament_elevation,pfbl-filament_elevation+pfbd/2]); mirror([0,1,0]) cube(size=[epsilon,body_h-filament_elevation,pfbl-body_h+filament_elevation+pfbd/2]); }//translate }//hull }//translate rotate translate rotate translate }//union (first child of difference) // protrusion translate([0,0,-1]) cylinder(d=protrusion_d+protrusion_tolerance_h,h=protrusion_h+protrusion_tolerance_v+1,$fn=fnd*(protrusion_d+protrusion_tolerance_h)); // mount screw holes for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0]) { translate([0,0,mount_screw_l-mount_depth-(bridges?layer_height:-epsilon)]) mirror([0,0,1]) cylinder(d=mount_screw_d+mount_screw_d_tolerance, 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,pf_offset]) rotate([0,0,180]) { pushfit(pf); mirror([0,0,1]) { fh = 1.5* (filament_guide_d-filament_path_d)/2; fo = pf_offset -filament_path_d /*(idler_d+idler_clearance)/2*/-fh; translate([0,0,-1]) teardrop(d=filament_guide_d,h=fo/2,angle=225); translate([0,0,-1]) teardrop(d=filament_path_d,h=gearbox_d/2+1,angle=-225); translate([0,0,fo+epsilon]) cylinder(d1=filament_path_d,d2=filament_guide_d,h=fh,$fn=fnd*filament_guide_d); }//mirror }//rotate translate rotate translate rotate translate // pulley cylinder(d=pulley_d+pulley_small_d_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_d_clearance)); cylinder(d=pulley_d+pulley_d_clearance,ls_z-max(idler_h,filament_guide_d)/2,$fn=fnd*(pulley_d+pulley_d_clearance)); translate([0,0,ls_z-ls_h/2]) { // idler travel translate([mount_d/2,0,0]) rotate([0,0,45]) rotate_extrude(angle=90,$fn=fnr*(shortwing+(idler_d+idler_clearance)/2)) square([shortwing+(idler_d+idler_clearance)/2,ls_h]); // idler itself place_idler() cylinder(d=idler_d+idler_clearance,h=ls_h,$fn=fnd*(idler_d+idler_clearance)); // lever space rotate([0,0,45]) rotate_extrude(angle=-135+max(atan(2*fsw/gearbox_d-1),atan(gearbox_d/mount_d-1))) square([gearbox_d/2+1,ls_h]); } // back side cutout // XXX: this is somewhat ugly and potentially bugged, // but I want to sleep. a0_ = atan( (pf_offset+pf_h(pf)+gearbox_d/2) / ( pulley_d/2+filament_offset- (pf_d(pf)+2*pf_shell)/2/cos(30) ) ); a0 = -135 + ( (a0_>0) ? a0_ : 180+a0_ ); a1 = atan((longwing-lever_thickness/2)/(gearbox_d/2)); translate([0,0,ls_z]) difference() { rotate([0,0,-180+a0]) rotate_extrude(angle=a1-a0) translate([0,-ls_h/2]) square([sqrt(pow(gearbox_d/2,2)+pow(longwing-lever_thickness/2,2))+1, ls_h]); translate([-mount_d/2,0,0]) cylinder(d=gearbox_d-mount_d,h=ls_h+2,center=true,$fn=fnd*(gearbox_d-mount_d)); }//difference translate // spring tensioner translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) { mirror([0,0,1]) { translate([0,0,st_thickshell]) hull() for(o=[0,spring_d]) translate([0,-o,0]) rotate([0,0,30]) cylinder(d=st_nut_d+st_nut_d_tolerance,h=st_nut_h+st_nut_h_tolerance,$fn=6); translate([0,0,-1]) cylinder(d=st_screw_d+st_screw_d_tolerance,h=fsw+2,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); bigd = spring_d+spring_d_clearance; hf = (bigd-st_screw_d-st_screw_d_tolerance)/2; translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell-epsilon]) { cylinder(d1=st_screw_d+st_screw_d_tolerance,d2=bigd, h=hf+epsilon, $fn=fnd*bigd); - translate([0,-(st_split_w+st_split_w_tolerance)/2,0]) - cube(size=[body_h-ls_z+1,st_split_w+st_split_w_tolerance,fsw+1]); + translate([0,-(st_split_w+st_split_w_tolerance)/2,0]) hull() { + cube(size=[body_h-ls_z-sp_ch-st_split_w_tolerance,st_split_w+st_split_w_tolerance,fsw+1]); + translate([0,0,sp_ch+st_split_w_tolerance+1]) + cube(size=[body_h-ls_z+1,st_split_w+st_split_w_tolerance,fsw+1]); + } }//translate translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon]) cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd); }//mirror }//translate // label body_label(); }//difference }//body module module body_label() { if(body_label) { label=body_label; label_thickness=body_label_thickness; label_len = len(label); labelspace = [gearbox_d/2-mount_screwhead_d/2-min_xy_shell,longwing-(mount_screwhead_d-st_split_w-st_split_w_tolerance)/2-2*min_xy_shell]; translate([0,0,body_h-label_thickness]) linear_extrude(height=label_thickness+epsilon,convexity=64) translate([-mount_screwhead_d/2-min_xy_shell-labelspace.x/2,-longwing+(st_split_w+st_split_w_tolerance)/2+min_xy_shell+labelspace.y/2]) mirror([left?0:1,0]) text(text=label,size=labelspace.x/label_len,halign="center",valign="center",font="Arial Black"); }else sphere(d=epsilon); // to avoid makefile breakage } module springpad() { smalld=st_screw_d+st_screw_d_tolerance+min_xy_shell; bigd = spring_d+spring_d_clearance/2; hf = (bigd-smalld)/2; h = max(hf,fsw-st_screw_l+hf); translate([-gearbox_d/2+fsw-h,-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,$fn=fnd*spring_d*3/4); l = body_h-ls_z; - w = st_split_w; + w = sp_ch; hull() translate([0,-st_split_w/2,0]) mirror([1,0,0]) { translate([0,0,w]) cube(size=[l,st_split_w,w]); cube(size=[l-w,st_split_w,2*w]); } } translate([0,0,-epsilon]) cylinder(d=st_screw_d+st_screw_d_tolerance,h=st_screw_l-fsw+h+2*epsilon,$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"); }else sphere(d=epsilon); // to avoid makefile breakage } 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=="knob.label") color("brown",0.7) knob_label(); 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("brown",0.7) body_label(); color("red",0.7) knob(); color("brown",0.7) knob_label(); color("blue",0.7) springpad(); |