catch_stalk_h = 4.5;
catch_stalk_len = 50;
+catch_tip_th = 4;
catch_head_th = 3;
catch_pin_slop = 0.25; // each side, and above
catch_knob_dia = 6;
catch_knob_above_gap = 5;
-catch_knob_height = 5;
+catch_knob_height = 3.0;
catch_stalk_below_gap = 1.0;
catch_stalk_beside_gap = 2.0;
// CATCH
-//cppy6 = -catch_strap_width * 2/3;
-
cppxC = 0.41 * sm_inner_rad * TAU;
// catch pin
cppd = [ bayo_n[0]
- catch_pin_slop - catch_pin_slop_x_extra,
-catch_stalk_above_gap ];
+cppi = [ cppa[0], cppd[1] ];
cppc = [ cppd[0], cppb[1] ];
cpph = cppd + [0,-1] * catch_stalk_h;
cppe = cppd + [0,-1] * (catch_knob_above_gap + catch_knob_dia/2);
// 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_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] ];
difference(){
union(){
hull(){
- translate(cpp3) circle(r= catch_cr);
+ translate(cpp3) circle(r= catch_cr3);
polygon([ cpp3,
cpp2r,
cpp5,
}
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(){
+module CatchTipProfile(dy){
+ ddy = [0,dy];
intersection(){
translate(cppF){
difference(){
}
}
polygon([ cppa,
- cppg,
- cpph,
- cppd,
+ cppi + ddy,
+ cppd + ddy,
cppc,
cppb ]);
}
+}
+
+module CatchHeadProfile(){
polygon([ cppd,
- cppg,
+ cppd,
+ cppi,
cppf,
cppe,
cpph ]);
linear_extrude(height=catch_strap_thick, convexity=10)
CatchAssemblyCoreProfile();
+ hull(){
+ linear_extrude(height=catch_head_th, convexity=10)
+ CatchTipProfile(0);
+ linear_extrude(height=catch_tip_th, convexity=10)
+ CatchTipProfile(catch_tip_th - catch_head_th);
+ }
+
linear_extrude(height=catch_head_th, convexity=10)
CatchHeadProfile();