-rw-r--r-- | another.scad | 73 |
1 files changed, 36 insertions, 37 deletions
diff --git a/another.scad b/another.scad index 78d4320..b752f30 100644 --- a/another.scad +++ b/another.scad | |||
@@ -36,97 +36,97 @@ module the_extruder( | |||
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 = 4*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 | supports = false, bridges = true, | 74 | supports = false, bridges = true, |
75 | tensioner = true, | 75 | tensioner = true, |
76 | debug = false | 76 | debug = false |
77 | ) { | 77 | ) { |
78 | fnd = 2*PI; fnr = 2*fnd; | 78 | fnd = 2*PI; fnr = 2*fnd; |
79 | 79 | ||
80 | idler_filament_offset = filament_path_d/2; // -filament_offset; | 80 | idler_filament_offset = filament_path_d/2; // -filament_offset; |
81 | lever_shell = mount_screwhead_h+0.5; | 81 | lever_shell = mount_screwhead_h+0.5; |
82 | lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); | 82 | lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); |
83 | lsd = idler_d-idler_clearance*2; | 83 | lsd = idler_d-idler_clearance*2; |
84 | longwing=gearbox_d/2+spring_d/2+lsd/2; | 84 | longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+extrusion_width; |
85 | shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) | 85 | shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) |
86 | sqrt(c*c+pow(a-c,2)); | 86 | sqrt(c*c+pow(a-c,2)); |
87 | longwing_travel = idler_travel*longwing/shortwing; | 87 | longwing_travel = idler_travel*longwing/shortwing; |
88 | h_ = (pulley_d+idler_d)/(2*sqrt(2)); | 88 | h_ = (pulley_d+idler_d)/(2*sqrt(2)); |
89 | ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); | 89 | ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); |
90 | spring_dl = idler_travel*longwing/ri; | 90 | spring_dl = idler_travel*longwing/ri; |
91 | // finger and spring support | 91 | // finger and spring support |
92 | fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); | 92 | fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); |
93 | 93 | ||
94 | mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; | 94 | mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; |
95 | mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; | 95 | mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; |
96 | filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; | 96 | filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; |
97 | ls_z = filament_elevation; // leverspace mid-z | 97 | ls_z = filament_elevation; // leverspace mid-z |
98 | ls_h = lever_thickness+lever_v_clearance; // leverspace height | 98 | ls_h = lever_thickness+lever_v_clearance; // leverspace height |
99 | mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); | 99 | mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); |
100 | body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); | 100 | body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); |
101 | echo("mount depth",mount_depth); | 101 | echo("mount depth",mount_depth); |
102 | 102 | ||
103 | module teardrop(r,d,h,center=false,angle=45) { | 103 | module teardrop(r,d,h,center=false,angle=45) { |
104 | dd = d ? d : (2*r); | 104 | dd = d ? d : (2*r); |
105 | $fn = dd*fnd; | 105 | $fn = dd*fnd; |
106 | cylinder(d=dd,h=h,center=center); | 106 | cylinder(d=dd,h=h,center=center); |
107 | if(angle>0) translate([0,0,center?-h/2:0]) | 107 | if(angle>0) translate([0,0,center?-h/2:0]) |
108 | rotate([0,0,angle]) | 108 | rotate([0,0,angle]) |
109 | cube(size=[d/2,d/2,h]); | 109 | cube(size=[d/2,d/2,h]); |
110 | } | 110 | } |
111 | 111 | ||
112 | module mirrorleft() { | 112 | module mirrorleft() { |
113 | mirror([left?0:1,0,0]) children(); | 113 | mirror([left?0:1,0,0]) children(); |
114 | } | 114 | } |
115 | module place_idler() { | 115 | module place_idler() { |
116 | rotate([0,0,45]) | 116 | rotate([0,0,45]) |
117 | translate([(pulley_d+idler_d)/2,0,0]) | 117 | translate([(pulley_d+idler_d)/2,0,0]) |
118 | children(); | 118 | children(); |
119 | } | 119 | } |
120 | module finger_indent(d=lever_thickness,depth/*=1*/,r/*=15*/) { | 120 | module finger_indent(d=lever_thickness,depth/*=1*/,r/*=15*/) { |
121 | if(depth) { | 121 | if(depth) { |
122 | hh = (-4*pow(depth,2)+pow(d,2))/(8*depth); | 122 | hh = (-4*pow(depth,2)+pow(d,2))/(8*depth); |
123 | rr = depth+hh; | 123 | rr = depth+hh; |
124 | translate([0,0,hh]) sphere(r=rr,$fn=fnr*rr); | 124 | translate([0,0,hh]) sphere(r=rr,$fn=fnr*rr); |
125 | }else if(r) { | 125 | }else if(r) { |
126 | hh=sqrt(pow(r,2)-pow(d,2)/4); | 126 | hh=sqrt(pow(r,2)-pow(d,2)/4); |
127 | translate([0,0,hh]) sphere(r=r,$fn=fnr*r); | 127 | translate([0,0,hh]) sphere(r=r,$fn=fnr*r); |
128 | } | 128 | } |
129 | } | 129 | } |
130 | 130 | ||
131 | % if(vitamins) mirrorleft() { | 131 | % if(vitamins) mirrorleft() { |
132 | translate([0,0,-epsilon]) mirror([0,0,1]) cylinder(d=gearbox_d,h=1,$fn=60); | 132 | translate([0,0,-epsilon]) mirror([0,0,1]) cylinder(d=gearbox_d,h=1,$fn=60); |
@@ -190,132 +190,108 @@ module the_extruder( | |||
190 | sqrt(2)*(mount_d-pulley_d+lsd)/2 | 190 | sqrt(2)*(mount_d-pulley_d+lsd)/2 |
191 | ]) { | 191 | ]) { |
192 | cylinder(d1=filament_path_d,d2=2*filament_path_d, | 192 | cylinder(d1=filament_path_d,d2=2*filament_path_d, |
193 | h=filament_path_d,$fn=2*filament_path_d*fnd); | 193 | h=filament_path_d,$fn=2*filament_path_d*fnd); |
194 | translate([0,0,filament_path_d-epsilon]) | 194 | translate([0,0,filament_path_d-epsilon]) |
195 | cylinder(d=2*filament_path_d,h=lsd,$fn=2*filament_path_d*fnd); | 195 | cylinder(d=2*filament_path_d,h=lsd,$fn=2*filament_path_d*fnd); |
196 | }//translate | 196 | }//translate |
197 | }//rotate translate place_idler | 197 | }//rotate translate place_idler |
198 | 198 | ||
199 | // idler space and mounting hole | 199 | // idler space and mounting hole |
200 | place_idler() { | 200 | place_idler() { |
201 | difference() { | 201 | difference() { |
202 | cylinder(d=idler_d+idler_clearance*2,h=idler_h+idler_v_tolerance,center=true,$fn=60); | 202 | cylinder(d=idler_d+idler_clearance*2,h=idler_h+idler_v_tolerance,center=true,$fn=60); |
203 | if(supports) for(y=[-lsd/2+extrusion_width:(lsd-2*extrusion_width)/3:lsd/2-extrusion_width]) | 203 | if(supports) for(y=[-lsd/2+extrusion_width:(lsd-2*extrusion_width)/3:lsd/2-extrusion_width]) |
204 | translate([-lsd/2-1,y-extrusion_width/2,-idler_h/2-idler_v_tolerance/2-1]) | 204 | translate([-lsd/2-1,y-extrusion_width/2,-idler_h/2-idler_v_tolerance/2-1]) |
205 | cube(size=[lsd+2,extrusion_width,idler_h+idler_v_tolerance+2]); | 205 | cube(size=[lsd+2,extrusion_width,idler_h+idler_v_tolerance+2]); |
206 | } | 206 | } |
207 | cylinder(d=idler_screw_d,h=lever_thickness+2,center=true,$fn=30); | 207 | cylinder(d=idler_screw_d,h=lever_thickness+2,center=true,$fn=30); |
208 | translate([0,0,lever_thickness/2-idler_screwhead_h]) | 208 | translate([0,0,lever_thickness/2-idler_screwhead_h]) |
209 | cylinder(d=idler_screwhead_d,h=idler_screwhead_h+1,$fn=fnd*idler_screwhead_d); | 209 | cylinder(d=idler_screwhead_d,h=idler_screwhead_h+1,$fn=fnd*idler_screwhead_d); |
210 | } | 210 | } |
211 | // mounting screw hole | 211 | // mounting screw hole |
212 | translate([mount_d/2,0,0]) | 212 | translate([mount_d/2,0,0]) |
213 | cylinder(d=mount_screw_d+mount_screw_d_tolerance,h=lever_thickness+2,center=true,$fn=fnd*mount_screw_d); | 213 | cylinder(d=mount_screw_d+mount_screw_d_tolerance,h=lever_thickness+2,center=true,$fn=fnd*mount_screw_d); |
214 | 214 | ||
215 | // lever end | 215 | // lever end |
216 | translate([mount_d/2,0,0]) rotate([0,90,0]) { | 216 | translate([mount_d/2,0,0]) rotate([0,90,0]) { |
217 | translate([0,-longwing,lsd/2]) finger_indent(d=lever_thickness-1,r=15); | 217 | translate([0,-longwing,lsd/2]) finger_indent(d=lever_thickness-1,r=15); |
218 | translate([0,-longwing,0]) | 218 | translate([0,-longwing,0]) |
219 | mirror([0,0,1]) | 219 | mirror([0,0,1]) |
220 | difference() { | 220 | difference() { |
221 | cylinder(d=spring_d+spring_d_clearance,h=lsd,$fn=fnd*(spring_d+spring_d_clearance)); | 221 | cylinder(d=spring_d+spring_d_clearance,h=lsd,$fn=fnd*(spring_d+spring_d_clearance)); |
222 | sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); | 222 | sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); |
223 | } | 223 | } |
224 | }//rotate-translate | 224 | }//rotate-translate |
225 | }//difference | 225 | }//difference |
226 | // bridging patch | 226 | // bridging patch |
227 | if(bridges) place_idler() | 227 | if(bridges) place_idler() |
228 | translate([0,0,lever_thickness/2-mount_screwhead_h]) | 228 | translate([0,0,lever_thickness/2-mount_screwhead_h]) |
229 | mirror([0,0,1]) | 229 | mirror([0,0,1]) |
230 | cylinder(d=mount_screwhead_d,h=layer_height); | 230 | cylinder(d=mount_screwhead_d,h=layer_height); |
231 | }//translate | 231 | }//translate |
232 | }//lever module | 232 | }//lever module |
233 | 233 | ||
234 | module body() { | 234 | module body() { |
235 | difference() { | 235 | difference() { |
236 | union() { | 236 | union() { |
237 | cylinder(d=gearbox_d,h=body_h,$fn=fnd*gearbox_d); | 237 | cylinder(d=gearbox_d,h=body_h,$fn=fnd*gearbox_d); |
238 | translate([-gearbox_d/2,0,0]) difference() { | 238 | // spring tensioner part |
239 | union() { | 239 | translate([-gearbox_d/2,0,0]) hull() { |
240 | hull() { | 240 | translate([0,-longwing,ls_z]) |
241 | translate([0,-longwing,ls_z]) | 241 | rotate([0,90,0]) |
242 | rotate([0,90,0]) | 242 | cylinder(d=lever_thickness,h=fsw,$fn=fnd*lever_thickness); |
243 | cylinder(d=lever_thickness,h=fsw,$fn=fnd*lever_thickness); | 243 | hh=body_h-ls_z; |
244 | hh=body_h-ls_z; | 244 | translate([0,0,ls_z]) |
245 | translate([0,0,ls_z]) | 245 | mirror([0,1,0]) cube(size=[fsw,longwing+(st_thinshell+st_split_w_tolerance)/2+st_thickshell,body_h-ls_z]); |
246 | mirror([0,1,0]) cube(size=[fsw,longwing+(st_thinshell+st_split_w_tolerance)/2+st_thickshell,body_h-ls_z]); | 246 | hhh=ls_z; |
247 | hhh=ls_z; | 247 | translate([0,0,0]) |
248 | translate([0,0,0]) | 248 | mirror([0,1,0]) cube(size=[fsw,longwing-hhh+lever_thickness/sqrt(2),hhh+lever_thickness/2]); |
249 | mirror([0,1,0]) cube(size=[fsw,longwing-hhh+lever_thickness/sqrt(2),hhh+lever_thickness/2]); | 249 | }//hull translate |
250 | } | ||
251 | } | ||
252 | translate([0,-longwing,ls_z]) rotate([0,-90,0]) { | ||
253 | if(!tensioner) finger_indent(d=lever_thickness-1,r=15); else { | ||
254 | mirror([0,0,1]) { | ||
255 | translate([0,0,st_thickshell]) | ||
256 | hull() for(o=[0,spring_d]) translate([0,-o,0]) | ||
257 | rotate([0,0,30]) | ||
258 | cylinder(d=st_nut_d+st_nut_d_tolerance,h=st_nut_h+st_nut_h_tolerance,$fn=6); | ||
259 | 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)); | ||
260 | bigd = spring_d+spring_d_clearance; | ||
261 | hf = (bigd-st_screw_d-st_screw_d_tolerance)/2; | ||
262 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell-epsilon]) { | ||
263 | cylinder(d1=st_screw_d+st_screw_d_tolerance,d2=bigd, | ||
264 | h=hf+epsilon, $fn=fnd*bigd); | ||
265 | translate([0,-(st_thinshell+st_split_w_tolerance)/2,0]) | ||
266 | cube(size=[body_h-ls_z+1,st_thinshell+st_split_w_tolerance,fsw+1]); | ||
267 | } | ||
268 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon]) | ||
269 | cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd); | ||
270 | } | ||
271 | } | ||
272 | } | ||
273 | } // translate | ||
274 | 250 | ||
275 | // pushfit bracket | 251 | // pushfit bracket |
276 | translate([0,0,filament_elevation]) | 252 | translate([0,0,filament_elevation]) |
277 | rotate([0,0,45]) translate([pulley_d/2+filament_offset,0,0]) | 253 | rotate([0,0,45]) translate([pulley_d/2+filament_offset,0,0]) |
278 | rotate([-90,0,0]) | 254 | rotate([-90,0,0]) |
279 | translate([0,0,mount_d/sqrt(2)/2+mount_screw_d-gearbox_d/2/*TODO:*/]) { | 255 | translate([0,0,mount_d/sqrt(2)/2+mount_screw_d-gearbox_d/2/*TODO:*/]) { |
280 | pfbl = pf_h(pf)+gearbox_d/2; //TODO: | 256 | pfbl = pf_h(pf)+gearbox_d/2; //TODO: |
281 | if(pf_smooth) { | 257 | if(pf_smooth) { |
282 | pfbd = pf_d(pf)+2*pf_shell; | 258 | pfbd = pf_d(pf)+2*pf_shell; |
283 | hull() { | 259 | hull() { |
284 | cylinder(d=pfbd,h=pfbl,$fn=pfbd*fnd); | 260 | cylinder(d=pfbd,h=pfbl,$fn=pfbd*fnd); |
285 | translate([-epsilon/2,0,0]) { | 261 | translate([-epsilon/2,0,0]) { |
286 | cube(size=[epsilon,filament_elevation,pfbl-filament_elevation+pfbd/2]); | 262 | cube(size=[epsilon,filament_elevation,pfbl-filament_elevation+pfbd/2]); |
287 | mirror([0,1,0]) | 263 | mirror([0,1,0]) |
288 | cube(size=[epsilon,body_h-filament_elevation,pfbl-body_h+filament_elevation+pfbd/2]); | 264 | cube(size=[epsilon,body_h-filament_elevation,pfbl-body_h+filament_elevation+pfbd/2]); |
289 | }//translate | 265 | }//translate |
290 | }//hull | 266 | }//hull |
291 | }else{ | 267 | }else{ |
292 | pfb2a = pf_d(pf)+2*pf_shell; pfba = pfb2a/2; | 268 | pfb2a = pf_d(pf)+2*pf_shell; pfba = pfb2a/2; |
293 | pfbd = pfb2a/cos(30); | 269 | pfbd = pfb2a/cos(30); |
294 | pfbs = pfb2a*tan(30); | 270 | pfbs = pfb2a*tan(30); |
295 | cylinder(d=pfbd,h=pfbl,$fn=6); | 271 | cylinder(d=pfbd,h=pfbl,$fn=6); |
296 | translate([-pfbs/2,0,0]) { | 272 | translate([-pfbs/2,0,0]) { |
297 | hull() { | 273 | hull() { |
298 | translate([0,-pfba,0]) cube(size=[pfbs,pfb2a,pfbl]); | 274 | translate([0,-pfba,0]) cube(size=[pfbs,pfb2a,pfbl]); |
299 | cube(size=[pfbs,filament_elevation,pfbl-filament_elevation+pfba]); | 275 | cube(size=[pfbs,filament_elevation,pfbl-filament_elevation+pfba]); |
300 | mirror([0,1,0]) | 276 | mirror([0,1,0]) |
301 | cube(size=[pfbs,body_h-filament_elevation,pfbl-body_h+filament_elevation+pfba]); | 277 | cube(size=[pfbs,body_h-filament_elevation,pfbl-body_h+filament_elevation+pfba]); |
302 | }//hull | 278 | }//hull |
303 | }//translate*/ | 279 | }//translate*/ |
304 | }//if(pf_smooth) | 280 | }//if(pf_smooth) |
305 | }//translate rotate translate rotate translate | 281 | }//translate rotate translate rotate translate |
306 | }//union (first child of difference) | 282 | }//union (first child of difference) |
307 | 283 | ||
308 | // protrusion | 284 | // protrusion |
309 | translate([0,0,-1]) | 285 | translate([0,0,-1]) |
310 | cylinder(d=protrusion_d+protrusion_tolerance_h,h=protrusion_h+protrusion_tolerance_v+1,$fn=fnd*(protrusion_d+protrusion_tolerance_h)); | 286 | cylinder(d=protrusion_d+protrusion_tolerance_h,h=protrusion_h+protrusion_tolerance_v+1,$fn=fnd*(protrusion_d+protrusion_tolerance_h)); |
311 | // mount screw holes | 287 | // mount screw holes |
312 | for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0]) { | 288 | for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0]) { |
313 | translate([0,0,mount_screw_l-mount_depth-(bridges?layer_height:-epsilon)]) | 289 | translate([0,0,mount_screw_l-mount_depth-(bridges?layer_height:-epsilon)]) |
314 | mirror([0,0,1]) | 290 | mirror([0,0,1]) |
315 | cylinder(d=mount_screw_d+mount_screw_d_tolerance, | 291 | cylinder(d=mount_screw_d+mount_screw_d_tolerance, |
316 | h=mount_screw_l-mount_depth+1, | 292 | h=mount_screw_l-mount_depth+1, |
317 | $fn=fnd*(mount_screw_d+mount_screw_d_tolerance)); | 293 | $fn=fnd*(mount_screw_d+mount_screw_d_tolerance)); |
318 | translate([0,0,mount_screw_l-mount_depth]) | 294 | translate([0,0,mount_screw_l-mount_depth]) |
319 | cylinder(d=mount_screwhead_d,h=body_h+1,$fn=fnd*mount_screwhead_d); | 295 | cylinder(d=mount_screwhead_d,h=body_h+1,$fn=fnd*mount_screwhead_d); |
320 | }//for | 296 | }//for |
321 | // pushfit | 297 | // pushfit |
@@ -341,96 +317,119 @@ module the_extruder( | |||
341 | 317 | ||
342 | translate([0,0,ls_z-ls_h/2]) { | 318 | translate([0,0,ls_z-ls_h/2]) { |
343 | // idler travel | 319 | // idler travel |
344 | translate([mount_d/2,0,0]) | 320 | translate([mount_d/2,0,0]) |
345 | rotate([0,0,45]) | 321 | rotate([0,0,45]) |
346 | rotate_extrude(angle=90,$fn=fnr*(shortwing+(idler_d+idler_clearance)/2)) | 322 | rotate_extrude(angle=90,$fn=fnr*(shortwing+(idler_d+idler_clearance)/2)) |
347 | square([shortwing+(idler_d+idler_clearance)/2,ls_h]); | 323 | square([shortwing+(idler_d+idler_clearance)/2,ls_h]); |
348 | // idler itself | 324 | // idler itself |
349 | place_idler() | 325 | place_idler() |
350 | cylinder(d=idler_d+idler_clearance,h=ls_h,$fn=fnd*(idler_d+idler_clearance)); | 326 | cylinder(d=idler_d+idler_clearance,h=ls_h,$fn=fnd*(idler_d+idler_clearance)); |
351 | // lever space | 327 | // lever space |
352 | echo(atan(1-2*fsw/gearbox_d)); | 328 | echo(atan(1-2*fsw/gearbox_d)); |
353 | rotate([0,0,45]) | 329 | rotate([0,0,45]) |
354 | rotate_extrude(angle=-135+max(atan(2*fsw/gearbox_d-1),atan(gearbox_d/mount_d-1))) | 330 | rotate_extrude(angle=-135+max(atan(2*fsw/gearbox_d-1),atan(gearbox_d/mount_d-1))) |
355 | square([gearbox_d/2+1,ls_h]); | 331 | square([gearbox_d/2+1,ls_h]); |
356 | } | 332 | } |
357 | 333 | ||
358 | // back side cutout | 334 | // back side cutout |
359 | // XXX: this is somewhat ugly and potentially bugged, | 335 | // XXX: this is somewhat ugly and potentially bugged, |
360 | // but I want to sleep. | 336 | // but I want to sleep. |
361 | a0_ = atan( | 337 | a0_ = atan( |
362 | (mount_d/sqrt(2)/2+mount_screw_d+pf_h(pf)+gearbox_d/2) | 338 | (mount_d/sqrt(2)/2+mount_screw_d+pf_h(pf)+gearbox_d/2) |
363 | / | 339 | / |
364 | ( | 340 | ( |
365 | pulley_d/2+filament_offset- | 341 | pulley_d/2+filament_offset- |
366 | (pf_d(pf)+2*pf_shell)/2/cos(30) | 342 | (pf_d(pf)+2*pf_shell)/2/cos(30) |
367 | ) | 343 | ) |
368 | ); | 344 | ); |
369 | a0 = -135 + ( (a0_>0) ? a0_ : 180+a0_ ); | 345 | a0 = -135 + ( (a0_>0) ? a0_ : 180+a0_ ); |
370 | a1 = atan((longwing-lever_thickness/2)/(gearbox_d/2)); | 346 | a1 = atan((longwing-lever_thickness/2)/(gearbox_d/2)); |
371 | translate([0,0,ls_z]) difference() { | 347 | translate([0,0,ls_z]) difference() { |
372 | rotate([0,0,-180+a0]) | 348 | rotate([0,0,-180+a0]) |
373 | rotate_extrude(angle=a1-a0) | 349 | rotate_extrude(angle=a1-a0) |
374 | translate([0,-ls_h/2]) | 350 | translate([0,-ls_h/2]) |
375 | square([sqrt(pow(gearbox_d/2,2)+pow(longwing-lever_thickness/2,2))+1, | 351 | square([sqrt(pow(gearbox_d/2,2)+pow(longwing-lever_thickness/2,2))+1, |
376 | ls_h]); | 352 | ls_h]); |
377 | translate([-mount_d/2,0,0]) | 353 | translate([-mount_d/2,0,0]) |
378 | cylinder(d=gearbox_d-mount_d,h=ls_h+2,center=true,$fn=fnd*(gearbox_d-mount_d)); | 354 | cylinder(d=gearbox_d-mount_d,h=ls_h+2,center=true,$fn=fnd*(gearbox_d-mount_d)); |
379 | }//difference translate | 355 | }//difference translate |
380 | 356 | ||
381 | //translate([-mount_d/2,-longwing,filament_elevation]) | 357 | //translate([-mount_d/2,-longwing,filament_elevation]) |
382 | if(!tensioner) /* XXX: this seems to be bullshit, but it's so old, that it's historical bullshit */ | 358 | if(!tensioner) /* XXX: this seems to be bullshit, but it's so old, that it's historical bullshit */ |
383 | translate([mount_d/2,-longwing,filament_elevation]) | 359 | translate([mount_d/2,-longwing,filament_elevation]) |
384 | rotate([0,-90,0]) difference() { | 360 | rotate([0,-90,0]) difference() { |
385 | cylinder(d=spring_d+spring_d_clearance,h=spring_lc+spring_dl,$fn=fnd*(spring_d+spring_d_clearance)); | 361 | cylinder(d=spring_d+spring_d_clearance,h=spring_lc+spring_dl,$fn=fnd*(spring_d+spring_d_clearance)); |
386 | translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); | 362 | translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); |
387 | } | 363 | } |
388 | 364 | ||
365 | // spring tensioner | ||
366 | translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) { | ||
367 | if(!tensioner) finger_indent(d=lever_thickness-1,r=15); else { | ||
368 | mirror([0,0,1]) { | ||
369 | translate([0,0,st_thickshell]) | ||
370 | hull() for(o=[0,spring_d]) translate([0,-o,0]) | ||
371 | rotate([0,0,30]) | ||
372 | cylinder(d=st_nut_d+st_nut_d_tolerance,h=st_nut_h+st_nut_h_tolerance,$fn=6); | ||
373 | 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)); | ||
374 | bigd = spring_d+spring_d_clearance; | ||
375 | hf = (bigd-st_screw_d-st_screw_d_tolerance)/2; | ||
376 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell-epsilon]) { | ||
377 | cylinder(d1=st_screw_d+st_screw_d_tolerance,d2=bigd, | ||
378 | h=hf+epsilon, $fn=fnd*bigd); | ||
379 | translate([0,-(st_thinshell+st_split_w_tolerance)/2,0]) | ||
380 | cube(size=[body_h-ls_z+1,st_thinshell+st_split_w_tolerance,fsw+1]); | ||
381 | } | ||
382 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon]) | ||
383 | cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd); | ||
384 | } | ||
385 | } | ||
386 | } | ||
387 | |||
389 | }//difference | 388 | }//difference |
390 | 389 | ||
391 | if(supports) intersection() { | 390 | if(supports) intersection() { |
392 | difference() { | 391 | difference() { |
393 | translate([0,0,ls_z-ls_h/2-epsilon]) | 392 | translate([0,0,ls_z-ls_h/2-epsilon]) |
394 | cylinder(d=gearbox_d,h=ls_h+2*epsilon,$fn=fnd*gearbox_d); | 393 | cylinder(d=gearbox_d,h=ls_h+2*epsilon,$fn=fnd*gearbox_d); |
395 | cylinder(d=pulley_d+pulley_d_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_d_clearance)); | 394 | cylinder(d=pulley_d+pulley_d_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_d_clearance)); |
396 | } | 395 | } |
397 | // supports | 396 | // supports |
398 | // TODO: hardcoded stuff below… | 397 | // TODO: hardcoded stuff below… |
399 | if(false) { // parallel | 398 | if(false) { // parallel |
400 | for(y=[-gearbox_d:4:gearbox_d]) | 399 | for(y=[-gearbox_d:4:gearbox_d]) |
401 | translate([0,y-extrusion_width/2,0]) | 400 | translate([0,y-extrusion_width/2,0]) |
402 | cube(size=[gearbox_d,extrusion_width,body_h]); | 401 | cube(size=[gearbox_d,extrusion_width,body_h]); |
403 | }else{ // radial | 402 | }else{ // radial |
404 | for(zr=[-65:(65+50)/7:50]) | 403 | for(zr=[-65:(65+50)/7:50]) |
405 | rotate([0,0,zr]) translate([0,-extrusion_width/2,0]) | 404 | rotate([0,0,zr]) translate([0,-extrusion_width/2,0]) |
406 | cube(size=[gearbox_d,extrusion_width,body_h]); | 405 | cube(size=[gearbox_d,extrusion_width,body_h]); |
407 | } | 406 | } |
408 | } | 407 | } |
409 | 408 | ||
410 | }//body module | 409 | }//body module |
411 | 410 | ||
412 | module springpad() { | 411 | module springpad() { |
413 | smalld=st_screw_d+st_screw_d_tolerance+2*extrusion_width; | 412 | smalld=st_screw_d+st_screw_d_tolerance+2*extrusion_width; |
414 | bigd = spring_d+spring_d_clearance/2; | 413 | bigd = spring_d+spring_d_clearance/2; |
415 | hf = (bigd-smalld)/2; | 414 | hf = (bigd-smalld)/2; |
416 | h = hf*3.5; | 415 | h = hf*3.5; |
417 | translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation]) | 416 | translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation]) |
418 | rotate([0,90,0]) difference() { | 417 | rotate([0,90,0]) difference() { |
419 | union() { | 418 | union() { |
420 | cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd); | 419 | cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd); |
421 | translate([0,0,hf-epsilon]) | 420 | translate([0,0,hf-epsilon]) |
422 | cylinder(d=bigd,h=h-hf,$fn=fnd*bigd); | 421 | cylinder(d=bigd,h=h-hf,$fn=fnd*bigd); |
423 | translate([0,0,h]) | 422 | translate([0,0,h]) |
424 | sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); | 423 | sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); |
425 | l = body_h-ls_z; | 424 | l = body_h-ls_z; |
426 | w = st_thinshell; | 425 | w = st_thinshell; |
427 | hull() translate([0,-st_thinshell/2,0]) mirror([1,0,0]) { | 426 | hull() translate([0,-st_thinshell/2,0]) mirror([1,0,0]) { |
428 | translate([0,0,w]) | 427 | translate([0,0,w]) |
429 | cube(size=[l,st_thinshell,w]); | 428 | cube(size=[l,st_thinshell,w]); |
430 | cube(size=[l-w,st_thinshell,2*w]); | 429 | cube(size=[l-w,st_thinshell,2*w]); |
431 | } | 430 | } |
432 | } | 431 | } |
433 | translate([0,0,-epsilon]) | 432 | translate([0,0,-epsilon]) |
434 | cylinder(d=st_screw_d+st_screw_d_tolerance,h=2*hf+epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); | 433 | cylinder(d=st_screw_d+st_screw_d_tolerance,h=2*hf+epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); |
435 | } | 434 | } |
436 | } | 435 | } |