-rw-r--r-- | another.scad | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/another.scad b/another.scad index 20ac37a..bb67dea 100644 --- a/another.scad +++ b/another.scad | |||
@@ -1,167 +1,167 @@ | |||
1 | draft=true; | 1 | draft=true; |
2 | layer_height=0.2; extrusion_width=0.4; | 2 | layer_height=0.2; extrusion_width=0.4; |
3 | epsilon=0.01; | 3 | epsilon=0.01; |
4 | $fs=0.0125; | 4 | $fs=0.0125; |
5 | 5 | ||
6 | use <pushfittery.scad>; | 6 | use <pushfittery.scad>; |
7 | include <pushfit_data.scad>; | 7 | include <pushfit_data.scad>; |
8 | 8 | ||
9 | module the_extruder( | 9 | module the_extruder( |
10 | // motor properties | 10 | // motor properties |
11 | gearbox_d = 36, | 11 | gearbox_d = 36, |
12 | mount_d = 28, // the distance between opposite mounting holes | 12 | mount_d = 28, // the distance between opposite mounting holes |
13 | mounthole_depth = 5, | 13 | mounthole_depth = 5, |
14 | mounthole_min_depth = 3, mounthole_max_depth = 4, | 14 | mounthole_min_depth = 3, mounthole_max_depth = 4, |
15 | protrusion_d = 22, protrusion_h = 2.2, // the dimensions of the protrusion on top of gearbox | 15 | protrusion_d = 22, protrusion_h = 2.2, // the dimensions of the protrusion on top of gearbox |
16 | bore_d = 8, bore_l = 17.6, | 16 | bore_d = 8, bore_l = 17.6, |
17 | bore_dd = 7, | 17 | bore_dd = 7, |
18 | // pulley properties | 18 | // pulley properties |
19 | pulley_d = 11.5, pulley_h=10, | 19 | pulley_d = 11.5, pulley_h=10, |
20 | pulley_elevation = 1, // pulley elevation above the protrusion | 20 | pulley_elevation = 1, // pulley elevation above the protrusion |
21 | teeth_elevation = 7.5, // distance from the bottom of the pulley to its teeth | 21 | teeth_elevation = 7.5, // distance from the bottom of the pulley to its teeth |
22 | filament_offset = (8.25-(3.0+3.5)/2) - 11.5/2 + 1.75/2, | 22 | filament_offset = (8.25-(3.0+3.5)/2) - 11.5/2 + 1.75/2, |
23 | // idler properties | 23 | // idler properties |
24 | idler_d = 9.5, idler_h = 4, idler_id = 3,// idler dimensions: outer and inner diameters and height | 24 | idler_d = 9.5, idler_h = 4, idler_id = 3,// idler dimensions: outer and inner diameters and height |
25 | // spring properties | 25 | // spring properties |
26 | spring_d = 10, spring_lc = 9.6, // spring diameter and compressed length | 26 | spring_d = 10, spring_lc = 9.6, // spring diameter and compressed length |
27 | // filament path properties | 27 | // filament path properties |
28 | filament_d = 1.75, | 28 | filament_d = 1.75, |
29 | filament_path_d = 2, | 29 | filament_path_d = 2, |
30 | filament_guide_d = 4, // PTFE filament guide diameter | 30 | filament_guide_d = 4, // PTFE filament guide diameter |
31 | // knob properties | 31 | // knob properties |
32 | knob_h = 10, | 32 | knob_h = 10, |
33 | knob_bore_l = 4, | 33 | knob_bore_l = 4, |
34 | knob_indent_d = 4, | 34 | knob_indent_d = 4, |
35 | knob_indents = 12, | 35 | knob_indents = 12, |
36 | // spring tensioner | 36 | // spring tensioner |
37 | st_nut_d = 9, st_nut_h = 4, | 37 | st_nut_d = 9, st_nut_h = 4, |
38 | st_screw_d = 5, | 38 | st_screw_d = 5, |
39 | st_thickshell = 8*extrusion_width, st_thinshell = 4*extrusion_width, | 39 | st_thickshell = 8*extrusion_width, st_thinshell = 2*extrusion_width, |
40 | 40 | ||
41 | // screw it | 41 | // screw it |
42 | mount_screw_d = 3.1, mount_screw_l = 20, | 42 | mount_screw_d = 3.1, mount_screw_l = 20, |
43 | mount_screwhead_d=6, mount_screwhead_h=3, | 43 | mount_screwhead_d=6, mount_screwhead_h=3, |
44 | idler_screw_d = 3, | 44 | idler_screw_d = 3, |
45 | idler_screwhead_d=6, idler_screwhead_h=3, | 45 | idler_screwhead_d=6, idler_screwhead_h=3, |
46 | 46 | ||
47 | pf = pushfit_embeddest, | 47 | pf = pushfit_embeddest, |
48 | pf_shell = max(3*layer_height,3*extrusion_width), | 48 | pf_shell = max(3*layer_height,3*extrusion_width), |
49 | pf_smooth = true, | 49 | pf_smooth = true, |
50 | 50 | ||
51 | // empty spaces | 51 | // empty spaces |
52 | idler_travel = 3, // how far should idler travel when pressed | 52 | idler_travel = 3, // how far should idler travel when pressed |
53 | idler_clearance=1, | 53 | idler_clearance=1, |
54 | pulley_d_clearance=2, | 54 | pulley_d_clearance=2, |
55 | pulley_small_d_clearance=0.5, | 55 | pulley_small_d_clearance=0.5, |
56 | lever_v_clearance=.7, // vertical clearance for the lever | 56 | lever_v_clearance=.7, // vertical clearance for the lever |
57 | spring_d_clearance=1, | 57 | spring_d_clearance=1, |
58 | protrusion_tolerance_h=.5, // horizontal tolerance for the motor protrusion | 58 | protrusion_tolerance_h=.5, // horizontal tolerance for the motor protrusion |
59 | protrusion_tolerance_v=.5, // vertical tolerance for the motor protrusion | 59 | protrusion_tolerance_v=.5, // vertical tolerance for the motor protrusion |
60 | mount_screw_d_tolerance=.4, | 60 | mount_screw_d_tolerance=.4, |
61 | idler_v_tolerance=.5, | 61 | idler_v_tolerance=.5, |
62 | knob_bore_d_tolerance=.6, | 62 | knob_bore_d_tolerance=.6, |
63 | st_nut_h_tolerance=.2, | 63 | st_nut_h_tolerance=.2, |
64 | st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */ | 64 | st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */ |
65 | st_screw_d_tolerance=.5, | 65 | st_screw_d_tolerance=.5, |
66 | st_split_w_tolerance = .3, | 66 | st_split_w_tolerance = .3, |
67 | 67 | ||
68 | min_z_shell = 4*layer_height, // the very minimal shell thickness along z-axis. | 68 | min_z_shell = 4*layer_height, // the very minimal shell thickness along z-axis. |
69 | min_xy_shell = 2*extrusion_width, | 69 | min_xy_shell = 2*extrusion_width, |
70 | 70 | ||
71 | what="lever", // lever|body|knob|springpad|* | 71 | what="lever", // lever|body|knob|springpad|* |
72 | left=false, | 72 | left=false, |
73 | vitamins = true, | 73 | vitamins = true, |
74 | bridges = true, | 74 | bridges = true, |
75 | debug = false | 75 | debug = false |
76 | ) { | 76 | ) { |
77 | fnd = 2*PI; fnr = 2*fnd; | 77 | fnd = 2*PI; fnr = 2*fnd; |
78 | 78 | ||
79 | idler_filament_offset = filament_path_d/2; // -filament_offset; | 79 | idler_filament_offset = filament_path_d/2; // -filament_offset; |
80 | lever_shell = mount_screwhead_h+0.5; | 80 | lever_shell = mount_screwhead_h+0.5; |
81 | lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); | 81 | lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); |
82 | lsd = idler_d-idler_clearance*2; // the diameter of lever thingie | 82 | lsd = idler_d-idler_clearance*2; // the diameter of lever thingie |
83 | longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+min_xy_shell; | 83 | longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+min_xy_shell; |
84 | shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) | 84 | shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) |
85 | sqrt(c*c+pow(a-c,2)); | 85 | sqrt(c*c+pow(a-c,2)); |
86 | longwing_travel = idler_travel*longwing/shortwing; | 86 | longwing_travel = idler_travel*longwing/shortwing; |
87 | h_ = (pulley_d+idler_d)/(2*sqrt(2)); | 87 | h_ = (pulley_d+idler_d)/(2*sqrt(2)); |
88 | ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); | 88 | ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); |
89 | spring_dl = idler_travel*longwing/ri; | 89 | spring_dl = idler_travel*longwing/ri; |
90 | // finger and spring support | 90 | // finger and spring support |
91 | fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); | 91 | fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); |
92 | 92 | ||
93 | mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; | 93 | mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; |
94 | mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; | 94 | mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; |
95 | filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; | 95 | filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; |
96 | ls_z = filament_elevation; // leverspace mid-z | 96 | ls_z = filament_elevation; // leverspace mid-z |
97 | ls_h = lever_thickness+lever_v_clearance; // leverspace height | 97 | ls_h = lever_thickness+lever_v_clearance; // leverspace height |
98 | mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); | 98 | mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); |
99 | body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); | 99 | body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); |
100 | echo("mount depth",mount_depth); | 100 | echo("mount depth",mount_depth); |
101 | 101 | ||
102 | module teardrop(r,d,h,center=false,angle=45) { | 102 | module teardrop(r,d,h,center=false,angle=45) { |
103 | dd = d ? d : (2*r); | 103 | dd = d ? d : (2*r); |
104 | $fn = dd*fnd; | 104 | $fn = dd*fnd; |
105 | cylinder(d=dd,h=h,center=center); | 105 | cylinder(d=dd,h=h,center=center); |
106 | if(angle>0) translate([0,0,center?-h/2:0]) | 106 | if(angle>0) translate([0,0,center?-h/2:0]) |
107 | rotate([0,0,angle]) | 107 | rotate([0,0,angle]) |
108 | cube(size=[d/2,d/2,h]); | 108 | cube(size=[d/2,d/2,h]); |
109 | } | 109 | } |
110 | 110 | ||
111 | module mirrorleft() { | 111 | module mirrorleft() { |
112 | mirror([left?0:1,0,0]) children(); | 112 | mirror([left?0:1,0,0]) children(); |
113 | } | 113 | } |
114 | module place_idler() { | 114 | module place_idler() { |
115 | rotate([0,0,45]) | 115 | rotate([0,0,45]) |
116 | translate([(pulley_d+idler_d)/2,0,0]) | 116 | translate([(pulley_d+idler_d)/2,0,0]) |
117 | children(); | 117 | children(); |
118 | } | 118 | } |
119 | module finger_indent(d=lever_thickness,depth/*=1*/,r/*=15*/) { | 119 | module finger_indent(d=lever_thickness,depth/*=1*/,r/*=15*/) { |
120 | if(depth) { | 120 | if(depth) { |
121 | hh = (-4*pow(depth,2)+pow(d,2))/(8*depth); | 121 | hh = (-4*pow(depth,2)+pow(d,2))/(8*depth); |
122 | rr = depth+hh; | 122 | rr = depth+hh; |
123 | translate([0,0,hh]) sphere(r=rr,$fn=fnr*rr); | 123 | translate([0,0,hh]) sphere(r=rr,$fn=fnr*rr); |
124 | }else if(r) { | 124 | }else if(r) { |
125 | hh=sqrt(pow(r,2)-pow(d,2)/4); | 125 | hh=sqrt(pow(r,2)-pow(d,2)/4); |
126 | translate([0,0,hh]) sphere(r=r,$fn=fnr*r); | 126 | translate([0,0,hh]) sphere(r=r,$fn=fnr*r); |
127 | } | 127 | } |
128 | } | 128 | } |
129 | 129 | ||
130 | % if(vitamins) mirrorleft() { | 130 | % if(vitamins) mirrorleft() { |
131 | translate([0,0,-epsilon]) mirror([0,0,1]) cylinder(d=gearbox_d,h=1,$fn=60); | 131 | translate([0,0,-epsilon]) mirror([0,0,1]) cylinder(d=gearbox_d,h=1,$fn=60); |
132 | for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0]) | 132 | for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0]) |
133 | cylinder(d=mount_screw_d,h=20,$fn=30); | 133 | cylinder(d=mount_screw_d,h=20,$fn=30); |
134 | translate([0,0,-epsilon]) cylinder(d=protrusion_d,h=protrusion_h,$fn=30); | 134 | translate([0,0,-epsilon]) cylinder(d=protrusion_d,h=protrusion_h,$fn=30); |
135 | translate([0,0,protrusion_h]) { | 135 | translate([0,0,protrusion_h]) { |
136 | difference() { | 136 | difference() { |
137 | cylinder(d=bore_d,h=bore_l,$fn=30); | 137 | cylinder(d=bore_d,h=bore_l,$fn=30); |
138 | translate([-bore_d/2-1,bore_dd-bore_d/2,-1]) | 138 | translate([-bore_d/2-1,bore_dd-bore_d/2,-1]) |
139 | cube([bore_d+2,bore_d/2,bore_l+2]); | 139 | cube([bore_d+2,bore_d/2,bore_l+2]); |
140 | } | 140 | } |
141 | translate([0,0,pulley_elevation]) { | 141 | translate([0,0,pulley_elevation]) { |
142 | cylinder(d=pulley_d,h=pulley_h,$fn=30); | 142 | cylinder(d=pulley_d,h=pulley_h,$fn=30); |
143 | translate([0,0,teeth_elevation]) { | 143 | translate([0,0,teeth_elevation]) { |
144 | place_idler() { | 144 | place_idler() { |
145 | cylinder(d=idler_d,h=idler_h,center=true,$fn=30); | 145 | cylinder(d=idler_d,h=idler_h,center=true,$fn=30); |
146 | cylinder(d=idler_screw_d,h=lever_thickness+2,center=true,$fn=30); | 146 | cylinder(d=idler_screw_d,h=lever_thickness+2,center=true,$fn=30); |
147 | }//place idler | 147 | }//place idler |
148 | // filament path | 148 | // filament path |
149 | rotate([0,0,45]) { | 149 | rotate([0,0,45]) { |
150 | translate([pulley_d/2-idler_filament_offset,0,0]) rotate([90,0,0]) { | 150 | translate([pulley_d/2-idler_filament_offset,0,0]) rotate([90,0,0]) { |
151 | cylinder(d=filament_d,h=gearbox_d,center=false,$fn=15); | 151 | cylinder(d=filament_d,h=gearbox_d,center=false,$fn=15); |
152 | }//rotate translate | 152 | }//rotate translate |
153 | translate([pulley_d/2+filament_offset,0,0]) rotate([-90,0,0]) { | 153 | translate([pulley_d/2+filament_offset,0,0]) rotate([-90,0,0]) { |
154 | cylinder(d=filament_d,h=gearbox_d,center=false,$fn=15); | 154 | cylinder(d=filament_d,h=gearbox_d,center=false,$fn=15); |
155 | translate([0,0,mount_d/sqrt(2)/2+mount_screw_d]) | 155 | translate([0,0,mount_d/sqrt(2)/2+mount_screw_d]) |
156 | pushfit(pf); | 156 | pushfit(pf); |
157 | }//rotate translate | 157 | }//rotate translate |
158 | }//rotate | 158 | }//rotate |
159 | }//translate teeth | 159 | }//translate teeth |
160 | }//translate pulley | 160 | }//translate pulley |
161 | }//translate protrusion | 161 | }//translate protrusion |
162 | }//vitamins | 162 | }//vitamins |
163 | 163 | ||
164 | module lever() { | 164 | module lever() { |
165 | translate([0,0,protrusion_h+pulley_elevation+teeth_elevation]) { | 165 | translate([0,0,protrusion_h+pulley_elevation+teeth_elevation]) { |
166 | difference() { | 166 | difference() { |
167 | union() { | 167 | union() { |