sm_closure_cnr = 3.0;
-catch_stem_h = 3;
-catch_stem_len = 50;
-catch_stem_th = 3;
+catch_stalk_h = 5.0;
+catch_stalk_len = 50;
+catch_head_th = 3;
catch_pin_slop = 0.25; // each side, and above
+catch_pin_slop_x_extra = -0.55; // only on one side
catch_stalk_above_gap = 1.5;
-catch_stalk_eff_bend_rad = catch_stem_len * 0.75;
+catch_stalk_eff_bend_rad = catch_stalk_len * 0.75;
-catch_stalk_base_width = 15;
+catch_strap_width = 12;
+catch_stalk_base_width = catch_stalk_h;
catch_knob_dia = 6;
-catch_knob_above_gap = 8;
-catch_knob_height = 6;
+catch_knob_above_gap = 5;
+catch_knob_height = 3.5;
-catch_stem_below_gap = 1.0;
-catch_stem_beside_gap = 2.0;
-catch_pin_gap = 0.5;
-catch_hook_slope = 0.15;
+catch_stalk_below_gap = 1.0;
+catch_stalk_beside_gap = 2.0;
// calculated
smc_cnr_c_x = sm_bolt_shaft/2 - sm_closure_cnr
+ sm_bolt_head_thick/2 + smc_bolt_nut_eff_thick/2;
-catch_cr = catch_knob_dia/2 + catch_stem_beside_gap;
-catch_strap_width = sm_main_width;
+catch_cr = catch_knob_dia/2 + catch_stalk_beside_gap;
catch_strap_thick = sm_main_thick;
-catch_stem_end_h = catch_stem_h;
-catch_pin_width = (rivet_entry_width * sm_inner_rad / bayo_nom_rad)
- - catch_pin_gap;
echo("R ", sm_inner_rad, bayo_real_rad, bayo_nom_rad);
// CATCH
-//cppy6 = -catch_strap_width * 2/3;
-
cppxC = 0.41 * sm_inner_rad * TAU;
// catch pin
-cppa = bayo_f + [1,-1] * catch_pin_slop;
-cppb = bayo_g + [1,-1] * catch_pin_slop;
-cppd = [ bayo_n[0] - catch_pin_slop, -catch_stalk_above_gap ];
+cpp_adj = (bayo_n[0] - bayo_f[0]) * (1 - sm_inner_rad / bayo_nom_rad);
+// radius scaling due to nom and actual radius difference in
+// bayo entry construction
+
+cppa = bayo_f + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
+cppb = bayo_g + [1,-1] * catch_pin_slop + [1,0] * cpp_adj;
+cppd = [ bayo_n[0]
+ - catch_pin_slop - catch_pin_slop_x_extra,
+ -catch_stalk_above_gap ];
cppc = [ cppd[0], cppb[1] ];
-cpph = cppd + [0,-1] * catch_stem_h;
+cpph = cppd + [0,-1] * catch_stalk_h;
cppe = cppd + [0,-1] * (catch_knob_above_gap + catch_knob_dia/2);
cppf = [ cppa[0], cppe[1] ];
cppg = [ cppa[0], cpph[1] ];
cppB = 0.5 * (cppf + cppe);
+echo("RR", sm_inner_rad / bayo_nom_rad);
+
// catch assembly depression below pin
cppy6 = cppB[1] - (catch_knob_dia/2
+ (cppc[1] - cppd[1])
- + catch_stem_below_gap);
+ + catch_stalk_below_gap);
cpp7 = [ cppB[0], cppy6 + catch_cr ];
cpp11 = cpp7 + [1,0] * catch_cr;
cppy9 = cppy6 + catch_strap_width * 1/3;
// catch assembly stalk and so on
+catch_cr3 = catch_cr + catch_stalk_h;
+
cppF = [ cppg[0] - catch_stalk_eff_bend_rad, cppd[1] ];
-cpp4 = [ cppg[0] - catch_stem_len, cpph[1] ] + [1,-1] * catch_cr;
+cpp4 = [ cppg[0] - catch_stalk_len, cpph[1] ] + [1,-1] * catch_cr;
cpp5 = [ cpp4[0], cppC[1] + catch_cr ];
cpp2 = cpp5 + [-1,0] * (catch_cr * 2 + catch_stalk_base_width);
cpp2r = cpp2 + [1,0] * catch_cr;
cpp2d = cpp2 + [0,-1] * catch_cr;
-cpp3 = [ cpp2[0] + catch_cr * 2, cppd[1] - catch_cr ];
+cpp3 = [ cpp2[0] + catch_cr + catch_cr3, cppd[1] - catch_cr3 ];
cppA = [ -cppxC, cpp9[1] ];
cppE = [ cppA[0], cppD[1] ];
+catch_assembly_dy = -cppy9 + catch_strap_width;
+
module MainProfile(){
main_cnr_pos = [ side_thick, top_z ] - [1,1]*main_cnr;
ImplHeadCup();
}
-module SomeStrap(){
+module SomeStrap(width){
// children(0) is to add, (1) subtract
difference(){
union(){
- cylinder(r=sm_outer_rad, h=sm_main_width);
+ cylinder(r=sm_outer_rad, h=width);
StrapMountProtrusion(smc_cnr_c_x + sm_closure_cnr,
smc_max_y,
- sm_closure_cnr);
+ sm_closure_cnr,
+ width);
children(0);
}
translate([0,0,-1])
- cylinder(r=sm_inner_rad, h=sm_main_width+2);
+ cylinder(r=sm_inner_rad, h=width+2);
translate(smc_pos)
- StrapMountBolt(10);
+ StrapMountBolt(10, width);
translate(smc_pos)
cube([ sm_bolt_tighten_allow, 40,100 ], center=true);
children(1);
}
}
-module StrapMountBolt(l_delta){ ///toplevel
+module StrapMountBolt(l_delta, strap_width){ ///toplevel
// positioned relative to smc_pos
translate([(smc_bolt_nut_eff_thick - sm_bolt_head_thick)/2,
smc_bolt_y,
- sm_main_width/2]){
+ strap_width/2]){
translate([ -sm_bolt_shaft/2-1, 0,0 ]){
rotate([0,90,0]) cylinder(r= sm_bolt_dia/2, h= sm_bolt_shaft+2);
}
}
}
-module StrapMountProtrusion(half_x, max_y, cnr){
+module StrapMountProtrusion(half_x, max_y, cnr, width){
translate(smc_pos){
- linear_extrude(height=sm_main_width, convexity=10){
+ linear_extrude(height=width, convexity=10){
hull(){
for (m = [0,1]) mirror([m,0,0]) {
translate([-(half_x - cnr), max_y - cnr])
}
module StrapMount(){ ////toplevel
- SomeStrap(){
+ SomeStrap(sm_main_width){
rotate([0,0,180]){
StrapMountProtrusion(strap_hoop_inside/2 + strap_hoop_thick,
strap_hoop_thick,
difference(){
union(){
hull(){
- translate(cpp3) circle(r= catch_cr);
+ translate(cpp3) circle(r= catch_cr3);
polygon([ cpp3,
cpp2r,
cpp5,
cpp11,
]);
}
+ translate(cpp2) circle(r= catch_cr);
}
+ // if cpp11 is above cpp10, the subtracted hull above
+ // can go down too far. Ensure we do not cut off below cppy6.
+ polygon([ cppE,
+ cppD,
+ cpp9,
+ [ cpp9[0], cppy6 ],
+ [ cpp7[0] - catch_cr, cppy6 ],
+ cpp2d
+ ]);
}
module CatchHeadProfile(){
translate(cppF){
difference(){
circle(r = dist2d(cppF, cppd));
- circle(r = dist2d(cppF, cppa));
+ //circle(r = dist2d(cppF, cppa));
}
}
polygon([ cppa,
linear_extrude(height=catch_strap_thick, convexity=10)
CatchAssemblyCoreProfile();
- linear_extrude(height=catch_strap_thick, convexity=10)
+ linear_extrude(height=catch_head_th, convexity=10)
CatchHeadProfile();
translate(concat(cppB,[0])) hull(){
- translate([0,0, catch_knob_height - catch_knob_dia/2])
+ translate([0,0, catch_knob_height + catch_head_th - catch_knob_dia/2])
sphere(r = catch_knob_dia/2);
cylinder(r = catch_knob_dia/2, h = 0.1);
}
}
module CatchAssembly(){ /////toplevel
- rotate([0,0, -0.5 * (cpp1[0] + cpp2[0]) / sm_inner_rad * 360/TAU])
- translate([0,0, catch_strap_width])
+ rotate([0,0, -(cppe[0] + cppB[0] + catch_pin_slop) / sm_inner_rad * 360/TAU])
+ translate([0,0, catch_assembly_dy])
scale(sm_inner_rad / 100)
import(str("poster-tube-lid,CatchPostDistort-fa",
(coarse ? 20 : 3),
".stl"),
convexity=20);
- SomeStrap(){
+ SomeStrap(catch_strap_width){
union(){ }
union(){
translate([-200, -200, -200])
module CatchDemo(){ /////toplevel
color("blue") translate([0,0,
- -catch_strap_width
- -cpp0[1]
+ -catch_assembly_dy
])
CatchAssembly();
translate([0,0,+side_height
module CatchDemoS(){ /////toplevel
color("blue") translate([0,0,
- -catch_strap_width
- -cpp0[1]
+ -catch_assembly_dy
])
CatchAssembly();
intersection(){
~ianmdlvl / reprap-play.git / blobdiff