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fix tire (now prints and looks ok with "manual support")

master
Vitaliy Filippov 2014-06-12 18:33:43 +00:00
parent d6a3326b82
commit 9d2cf369f5
1 changed files with 72 additions and 41 deletions
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113
tire/tire_81.6_50.scad
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@ -5,10 +5,15 @@ $fn=60;
// 81.6x50:
// rim offset is (SPOKE_THICKNESS+(R_I-SPACING-RIM_THICKNESS-CUT_BASE)/2),
// so offset=4mm if SPOKE_THICKNESS=12.85
R=40.8; // outer radius
R_I=26.5; // innermost radius
BEVEL=2;
BEVEL_OUTER=0.8;
THICKNESS=2.5;
BORDER_THICKNESS=2.5;
PROT_DEPTH=1;
PROT_L_WIDTH=2;
PROT_A_WIDTH=2;
@ -19,14 +24,15 @@ B_P=4; // position of edge for the rim
W=50; // tire width
N_L=4; // number of lateral protectors
N_A=10; // number of angular protectors
SPOKE_THICKNESS=10; // thickness of solid spoke part
SPOKE_THICKNESS=12.85; // thickness of solid spoke part
RIM_THICKNESS=2;
N_SPOKE=9; // number of spokes
CUT_BASE=8;
CUT_ANGLE=12;
CUT_I_R=1.5;
CUT_O_R=2;
SPACING=0.2;
SPACING=0.6;
HOLE_RADIUS=2.4; // my Wanhao Duplicator 4 makes no errors with Slic3r, 2.4mm is ideal lego hole
// 6-spoke variant
N_SPOKE=6;
@ -36,56 +42,65 @@ CUT_O_R=2;
// small
R=22;
BEVEL=1;
THICKNESS=1.5;
FIX_WIDTH=1;
BEVEL=0.6;
THICKNESS=1.2;
BORDER_THICKNESS=0.8;
PROT_DEPTH=0.4;
SPOKE_THICKNESS=8;
FIX_WIDTH=1.2;
PROT_A_WIDTH=1;
PROT_L_WIDTH=1;
B_P=3;
B=1;
B_W=1;
B=1.6;
R_I=15;
CUT_O_R=1;
CUT_BASE=5;
N_L=2;
W=20;
N_A=0;
W=16;
difference() {
union() {
translate([0, 0, W]) rotate([180, 0, 0]) {
rim();
// Support ...
translate([0, 0, SPOKE_THICKNESS+(R_I-SPACING-RIM_THICKNESS-CUT_BASE)/2+SPACING]) cylinder(r=CUT_BASE, h=W-(SPOKE_THICKNESS+(R_I-SPACING-RIM_THICKNESS-CUT_BASE)/2+SPACING));
translate([0, 0, W-(B_P-FIX_WIDTH-SPACING)+SPACING]) cylinder(r=R_I+B-SPACING, h=(B_P-FIX_WIDTH-SPACING)-SPACING);
/*
translate([0, 0, W-(B_P-FIX_WIDTH-SPACING)-2-B+SPACING]) difference() {
cylinder(r=R_I+B+THICKNESS, h=(B_P-FIX_WIDTH-SPACING)+2+B-SPACING);
translate([0, 0, -1]) cylinder(r=R_I+B+SPACING, h=1+(B_P-FIX_WIDTH-SPACING)+2+B-SPACING-((B_P-FIX_WIDTH-SPACING)-SPACING));
}
*/
}
tire();
difference() {
tire();
// first layer usually becomes slightly bigger...
difference() {
cylinder(r=R, h=0.3);
translate([0, 0, -0.1]) cylinder(r=R-BEVEL_OUTER-0.2, h=1);
}
}
/*
// "Manual support material" needed to print tire
difference() {
hull() {
cylinder(r=R_I+B-0.2, h=B_P-0.2-(BEVEL-0.2*(2-sqrt(2))));
cylinder(r=R_I+B-0.2-(BEVEL-0.2*(2-sqrt(2))), h=B_P-0.2);
}
translate([0, 0, -0.1]) cylinder(r=R_I+B-0.2-2, h=B_P);
}
translate([0, 0, B_P+B_W+0.3])
difference() {
cylinder(r=R_I+B+THICKNESS, h=W-2*(B_P+B_W+0.3));
cylinder(r=R_I, h=W);
}*/
}
// to cut and look inside :)
translate([0, 0, -0.5]) cube(size=[R+10, R+10, W+1]);
}
module rim() {
V_SPACING=0.2;
color([0.5, 0.5, 1]) {
difference() {
union() {
cylinder(r=R_I-SPACING, h=W-(B_P-FIX_WIDTH-SPACING));
cylinder(r=R_I-SPACING, h=W-(B_P-FIX_WIDTH-V_SPACING));
// outer fixing edges
cylinder(r=R_I+B-SPACING, h=FIX_WIDTH+(B_P-FIX_WIDTH-SPACING));
translate([0, 0, W-(B_P-FIX_WIDTH-SPACING)-FIX_WIDTH]) cylinder(r=R_I+B-SPACING, h=FIX_WIDTH);
// inner fixing edges, 45 degree slope for easier printing
translate([0, 0, FIX_WIDTH+(B_P-FIX_WIDTH-SPACING)+(B_W+SPACING)+SPACING]) hull() {
cylinder(r=R_I+B+THICKNESS, h=FIX_WIDTH);
translate([0, 0, B+THICKNESS+SPACING]) cylinder(r=R_I-SPACING, h=FIX_WIDTH);
}
translate([0, 0, W-(FIX_WIDTH+(B_P-FIX_WIDTH-SPACING)+(B_W+SPACING))-FIX_WIDTH-SPACING]) hull() {
cylinder(r=R_I+B+THICKNESS, h=FIX_WIDTH);
translate([0, 0, -(B+THICKNESS+SPACING)]) cylinder(r=R_I-SPACING, h=FIX_WIDTH);
}
cylinder(r=R_I+B-SPACING, h=FIX_WIDTH+(B_P-FIX_WIDTH-V_SPACING));
translate([0, 0, W-(B_P-FIX_WIDTH-V_SPACING)-FIX_WIDTH]) cylinder(r=R_I+B-SPACING, h=FIX_WIDTH);
}
// make spokes by cutting space between them
for (i = [1 : N_SPOKE])
@ -104,9 +119,9 @@ module rim() {
translate([0, 0, -1]) cylinder(r=CUT_BASE-2, h=5+(B_P-FIX_WIDTH-SPACING));
// make spokes convex using another toroidal cut
difference() {
translate([0, 0, -1]) cylinder(r=1+R_I+B-0.5/*R_I-2*/, h=1+(B_P-FIX_WIDTH-SPACING));
translate([0, 0, (B_P-FIX_WIDTH-SPACING)])
scale([1, 1, (B_P-FIX_WIDTH-SPACING)/((R_I-SPACING-RIM_THICKNESS-CUT_BASE+2)/2)])
translate([0, 0, -1]) cylinder(r=1+R_I+B-0.5/*R_I-2*/, h=1+(B_P-FIX_WIDTH-V_SPACING));
translate([0, 0, (B_P-FIX_WIDTH-V_SPACING)])
scale([1, 1, (B_P-FIX_WIDTH-V_SPACING)/((R_I-SPACING-RIM_THICKNESS-CUT_BASE+2)/2)])
rotate_extrude(convexity = 10)
translate([(R_I-SPACING-CUT_BASE)/2+CUT_BASE-RIM_THICKNESS, 0, 0]) circle(r = (R_I-SPACING-CUT_BASE)/2);
}
@ -131,38 +146,55 @@ module rim_cut() {
}
module tire() {
b_i = BEVEL;
bo_i = max(BEVEL, BEVEL_OUTER-THICKNESS*(2-sqrt(2)));
difference() {
hull() {
translate([0, 0, BEVEL]) cylinder(r=R, h=W-BEVEL*2);
cylinder(r=R-BEVEL, h=W);
translate([0, 0, BEVEL_OUTER]) cylinder(r=R, h=W-BEVEL_OUTER*2);
cylinder(r=R-BEVEL_OUTER, h=W);
}
// center hole through all piece
translate([0, 0, -0.5]) cylinder(r=R_I, h=W+1);
// top hole
translate([0, 0, W-B_P]) cylinder(r=R_I+B, h=B_P+1);
hull() {
translate([0, 0, W-B_P+BEVEL]) cylinder(r=R_I+B, h=B_P+1);
translate([0, 0, W-B_P]) cylinder(r=R_I+B-BEVEL, h=B_P+1);
}
hull() {
translate([0, 0, W-BEVEL]) cylinder(r=R_I+B, h=BEVEL);
translate([0, 0, W]) cylinder(r=R_I+B+BEVEL, h=1);
}
// bottom hole
translate([0, 0, -1]) cylinder(r=R_I+B, h=B_P+1);
hull() {
translate([0, 0, -1]) cylinder(r=R_I+B-BEVEL, h=B_P+1);
translate([0, 0, -1]) cylinder(r=R_I+B, h=B_P+1-BEVEL);
}
hull() {
translate([0, 0, 0]) cylinder(r=R_I+B, h=BEVEL);
translate([0, 0, -1]) cylinder(r=R_I+B+BEVEL, h=1);
}
// inside cut
translate([0, 0, B_P+B_W]) cylinder(r=R-THICKNESS-PROT_DEPTH/2, h=W-(B_P+B_W)*2);
translate([0, 0, B_P+B_W]) cylinder(r=R-THICKNESS, h=W-(B_P+B_W)*2);
difference() {
translate([0, 0, THICKNESS]) cylinder(r=R-THICKNESS-PROT_DEPTH/2, h=W-THICKNESS*2);
hull() {
translate([0, 0, BORDER_THICKNESS]) cylinder(r=R-THICKNESS-bo_i, h=W-BORDER_THICKNESS*2);
translate([0, 0, BORDER_THICKNESS+bo_i]) cylinder(r=R-THICKNESS, h=W-BORDER_THICKNESS*2-bo_i*2);
}
cylinder(r=R_I+B+THICKNESS, h=W);
translate([0, 0, W-BORDER_THICKNESS-b_i])
linear_extrude(height=b_i, scale=(R_I+B+THICKNESS+b_i)/(R_I+B+THICKNESS))
circle(r=R_I+B+THICKNESS);
translate([0, 0, BORDER_THICKNESS])
linear_extrude(height=b_i, scale=(R_I+B+THICKNESS)/(R_I+B+THICKNESS+b_i))
circle(r=R_I+B+THICKNESS+b_i);
}
// lateral protector
if (N_L > 0) for (i = [1 : N_L])
translate([0, 0, -PROT_L_WIDTH/2+i*W/(N_L+1)])
difference() {
cylinder(r=R+1, h=PROT_L_WIDTH);
translate([0, 0, -0.01]) linear_extrude(height=min(PROT_L_WIDTH/2-0.1, PROT_DEPTH/2)+0.01, scale=(R-PROT_DEPTH)/(R+0.01)) circle(r=R+0.01);
translate([0, 0, PROT_L_WIDTH]) rotate([180, 0, 0]) translate([0, 0, -0.01]) linear_extrude(height=min(PROT_L_WIDTH/2-0.1, PROT_DEPTH/2)+0.01, scale=(R-PROT_DEPTH)/(R+0.01)) circle(r=R+0.01);
translate([0, 0, -0.01]) linear_extrude(height=PROT_L_WIDTH/2+0.01, scale=(R-PROT_DEPTH)/(R+0.01)) circle(r=R+0.01);
translate([0, 0, PROT_L_WIDTH]) rotate([180, 0, 0]) translate([0, 0, -0.01]) linear_extrude(height=PROT_L_WIDTH/2+0.01, scale=(R-PROT_DEPTH)/(R+0.01)) circle(r=R+0.01);
translate([0, 0, -0.1]) cylinder(r=R-PROT_DEPTH, h=PROT_L_WIDTH+0.2);
}
// angular protector
@ -185,7 +217,6 @@ module protector_angular() {
module axle(height) {
axle_gap = 1.95;
HOLE_RADIUS = 2.55;
union() {
translate([-HOLE_RADIUS, -axle_gap/2, 0])
roundedRect(HOLE_RADIUS * 2, axle_gap, .2);