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-rw-r--r--.gitignore3
-rw-r--r--Makefile21
-rw-r--r--x-carriage-adapter.scad145
3 files changed, 169 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
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--- a/dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
1/Makefile.local
2/*.stl
3/*.gcode
diff --git a/Makefile b/Makefile
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--- a/dev/null
+++ b/Makefile
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1-include Makefile.local
2
3OPENSCAD_APP?=/Applications/OpenSCAD.app
4OPENSCAD_BIN?=${OPENSCAD_APP}/Contents/MacOS/OpenSCAD
5OPENSCAD_FLAGS?=-D draft=false
6
7RENDERVIEWS=holder base
8STLS=$(addsuffix .stl,$(addprefix adapter-,${RENDERVIEWS}))
9
10default: all
11
12all: ${STLS}
13clean:
14 rm -f ${STLS}
15
16adapter-%.stl: x-carriage-adapter.scad
17 ${OPENSCAD_BIN} ${OPENSCAD_FLAGS} -D draft=false -D 'view="$*"' -o "$@" "$<"
18
19
20%.stl: %.scad
21 ${OPENSCAD_BIN} ${OPENSCAD_FLAGS} -o "$@" "$<"
diff --git a/x-carriage-adapter.scad b/x-carriage-adapter.scad
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index 0000000..af91d52
--- a/dev/null
+++ b/x-carriage-adapter.scad
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1screw_tolerance=0.1; slide_tolerance=.3; play_tolerance=.8;
2draft=true;
3use <e3dchimera.scad>;
4
5 assembly_height = 49.5; // the height of e3d chimera assembly in e3dchimera.scad
6 hs_nozzles_from_back = 6;// the distance from nozzles from the back of the heatsink
7 hs_size = [30,18,30]; // the heatsink size
8 mounting_holes_from_top = [// the offsets of mounting holes on the back
9 [0, 20], [-4.5,10], [4.5,10]
10];
11 mounting_holes_on_top = [// the offsets of mounting holes on the top
12 [0,-3], [-17/2,9], [17/2,9]
13];
14 feeds_apart = 18; // the distance between nozzles (and, therefore filament feeds)
15
16 feed_shell_d = 17; // the shell diameter around filament feed, pushfit's diameter
17 screw_shell_d = 8; // the shell diameter around screws
18 thread_h = 10.5; // the height of the pushfit's thread
19 hinge_s = 6; // hinges thickness
20
21 screwhead_d = 5.5; // the diameter of the screw head
22 screwhead_h = 3; // the height of the screw head
23
24 ms_size = [19.8,6,10]; // microswitch dimensions
25 ms_screws_apart = 9.5; // distance between microswitch mounting screws
26 ms_switch_offset = 2.5; // the offset of the switch from the center
27 ms_bump = ms_size[1]; // how far from hinge microswitch is mounted
28
29 lower_by = 15; // lower hotend from the original intention by this long
30 gap = 5; // gap between microswitch and heatsink
31
32 ps_offset = 3+3; // pushscrew offset from the hinge
33
34 back_thickness = 8; // thickness of the part behind the hinge
35 nut_thickness = 2.5; // intelligent guess should suffice
36 nut_width = 5.5; // intelligent guess should suffice
37
38use <threads.scad>;
39/* the internal thread for e3d bowden coupling: http://e3d-online.com/E3D-v6/Spares/Threaded-Bowden-Coupling-1.75mm-Filament */
40module pushfit_thread(h=thread_h) {
41 thr = 3/8 + .5/25.4;
42 slit = 25.4*thr/2 + 0.4;
43 translate([0,0,-1]) if(draft) cylinder(d=thr*25.4,h=h+2);
44 else english_thread(diameter=thr,threads_per_inch=28,length=(h+2)/25.4,internal=true);
45 translate([-2,-slit,-1]) cube([4,slit,h+2]);
46}
47
48
49 sff = hs_nozzles_from_back+gap; // switch from feeds
50 hff = sff+ms_size[1]+ms_bump+thread_h/2;// hinges from feeds
51
52module holder() {
53 translate([0,0,0]) difference() {
54 union() {
55 hull() {
56 rs = 3; drs = screw_shell_d/2-rs;
57 rf = 6; drf = feed_shell_d/2-rf;
58 for(sx=[-1,1]) translate([sx*feeds_apart/2,0,0]) {
59 translate([0,0,drf])
60 cylinder(d=feed_shell_d,h=thread_h-drf,$fn=60);
61 cylinder(r=rf,h=thread_h,$fn=30);
62 }
63 for(mhot = mounting_holes_on_top) translate([mhot[0],mhot[1],0]) {
64 translate([0,0,drs])
65 cylinder(d=screw_shell_d,h=thread_h-drs,$fn=30);
66 cylinder(r=rs,h=thread_h,$fn=30);
67 }
68 }
69 hull() {
70 translate([0,0,thread_h/2]) cube(size=[hs_size[0]-2*hinge_s-2*slide_tolerance,feed_shell_d,thread_h],center=true);
71 translate([0,-hff,thread_h/2])
72 rotate([0,90,0])
73 cylinder(d=thread_h,h=hs_size[0]-2*hinge_s-2*slide_tolerance,center=true,$fn=60);
74 }
75 }//union
76 for(sx=[-1,1]) translate([sx*feeds_apart/2,0,0])
77 pushfit_thread();
78 for(mhot = mounting_holes_on_top) translate([mhot[0],mhot[1],0]) {
79 translate([0,0,-1]) cylinder(d=3,h=thread_h+2,$fn=12); // TODO: sink heads
80 translate([0,0,thread_h/2]) cylinder(d=screwhead_d+slide_tolerance,h=thread_h/2+1,$fn=30);
81 }
82 // hinge
83 translate([0,-hff,thread_h/2])
84 rotate([0,90,0]) cylinder(d=3+slide_tolerance,h=hs_size[0],center=true,$fn=12);
85 // push screw
86 hull() for(oy=[-1,1]) translate([0,-hff+ps_offset+oy,-1]) cylinder(d=3+play_tolerance,h=thread_h+2,$fn=30);
87 // tune screw
88 translate([0,-sff-ms_size[1]/2,-1]) cylinder(d=3,h=thread_h+2);
89 }//difference
90}
91
92
93module base() {
94 us = 2*ms_size[2];
95 translate([0,-hff,0]) difference() {
96 union() {
97 for(sx=[-1,1]) translate([sx*(hs_size[0]-hinge_s)/2,0,0]) hull() {
98 translate([0,0,thread_h/2])
99 rotate([0,90,0]) cylinder(d=thread_h,h=hinge_s,center=true,$fn=60);
100 cube(size=[hinge_s,thread_h,thread_h],center=true);
101 translate([-hinge_s/2,0,-1]) mirror([0,1,0]) cube(size=[hinge_s,thread_h/2+back_thickness,thread_h+1]);
102 } // hull for
103 hull() {
104 translate([0,0,-us/2-slide_tolerance]) cube(size=[hs_size[0],thread_h+1,us],center=true);
105 for(sx=[-1,1]) translate([sx*(hs_size[0]/2-ms_bump),thread_h/2,-us-slide_tolerance])
106 cylinder(r=ms_bump,h=us+slide_tolerance,$fn=30);
107 }
108 translate([-hs_size[0]/2,-thread_h/2-slide_tolerance,-us-slide_tolerance])
109 mirror([0,1,0]) cube(size=[hs_size[0],back_thickness,us+slide_tolerance+thread_h]);
110 } // union
111 translate([0,0,thread_h/2])
112 rotate([0,90,0]) cylinder(d=3+screw_tolerance,h=hs_size[0]+2,center=true,$fn=12);
113 for(smx=[0,1]) mirror([smx,0,0])
114 translate([hs_size[0]/2+1,0,thread_h/2]) rotate([0,-90,0]) cylinder(d=screwhead_d+slide_tolerance,h=screwhead_h+1,$fn=30);
115 /* changed my mind; for(srx=[-1,1]) rotate([srx*15,0,0])
116 translate([0,0,thread_h/2-slide_tolerance])
117 cube(size=[hs_size[0]-2*hinge_s,thread_h*sqrt(2)+2,thread_h],center=true); */
118 // switch mount
119 for(sx=[-1,1]) translate([sx*ms_screws_apart/2+ms_switch_offset,thread_h/2,-ms_size[2]])
120 rotate([90,0,0])
121 cylinder(d=2.5,h=ms_size[1]*2,center=true,$fn=12);
122 // thing mount
123 translate([0,-thread_h/2-back_thickness,lower_by])
124 for(mhft = mounting_holes_from_top) translate([mhft[0],0,-mhft[1]]) {
125 rotate([-90,0,0])
126 translate([0,0,-1])
127 cylinder(d=3,h=back_thickness+1);
128 translate([0,back_thickness/2,0])
129 cube(size=[2*hs_size[0],nut_thickness+slide_tolerance,nut_width+slide_tolerance],center=true);
130 } // translate for
131 mirror([0,0,1]) translate([0,ps_offset,-1]) cylinder(d=3,h=hs_size[2]+1);
132 } // difference
133}
134
135view="*";
136
137if(view=="holder") {
138 holder();
139}else if(view=="base") {
140 base();
141}else {
142 % translate([0,0,-assembly_height]) chimera_assembly();
143 color("lightgreen",0.7) holder();
144 color("darkgreen",0.7) base();
145}