post_shorter = 1;
-screw_dia = 2.2;
+$screw_dia = 3.2;
screw_big_dia = 3.6;
screw_big_len = 4.0;
demo_slop = 0.1;
-leg_height = 50;
+leg_height = 53.75 - 0.95;
leg_hole_dia = 5 + 0.75;
leg_big_dia = 37;
leg_bot_dia = 15;
-leg_top_flat_z = 5;
+leg_top_flat_z = 2;
+leg_top_thick = 8;
-leg_fin_top_w = 5;
+leg_midspc_dia = 20;
+leg_bot_thick = 8;
+leg_bot_mid_dia = 12;
+
+leg_fin_top_w = 3;
leg_fin_bot_w = 5;
leg_fin_bot_rad = 30;
leg_fin_bot_flat_z = 5;
+leg_n_fins = 4;
+leg_n_tubules = 4;
+leg_tubule_dia = 4;
+
+// spacer
+
+spacer_ext_slop = 0.25;
+spacer_int_slop = 0.25;
+spacer_height = 10;
+
// cutout
machine_rear_to_front = 84 + 0.25 - 1.4;
leg_fin_top_rad = sqrt( pow(leg_big_dia/2,2) -
pow(leg_fin_top_w/2,2) );
+leg_tubule_pos_rad = leg_big_dia/2 * 0.6;
+
m4_define(`POST_TCROSSSZ',
`2*( tile_hard_edge_hole_dist - test_edge + 1 )')
cylinder(r= post_dia/2, h= tile_th + ply_th - post_shorter);
translate([0,0, tile_th]) {
cylinder(r= screw_big_dia/2, h= screw_big_len);
- cylinder(r= screw_dia/2, h= ply_th, $fn=20);
+ cylinder(r= $screw_dia/2, h= ply_th, $fn=20);
}
}
}
TestPiece2();
}
+module PostTestPiece(){ ////toplevel
+ hole_sizes = [2.8, 3.0, 3.1, 3.134, 3.168, 3.2, 3.3, 3.5];
+ nholes = len(hole_sizes)*2;
+ nrows = 4;
+ stride = post_dia*1.5;
+ rect_sz = stride * [ nrows,
+ ceil(nholes/nrows) ];
+ corners = Rectangle_corners(-stride * 0.5 * [1,1], rect_sz);
+ difference(){
+ union(){
+ TileBase(corners[0], corners[2]);
+ RoundEdge(corners[0], corners[1]);
+ for (i= [ 0: nholes-1 ]) {
+ $screw_dia = hole_sizes[ floor(i/2) ];
+ translate(stride * [ (nrows-1) - (i % nrows),
+ floor(i / nrows),
+ 0
+ ]) {
+ Posts([[0,0]]);
+ color("blue")
+ mirror([0,0,1])
+ translate([post_dia/2, -post_dia/2, 1])
+ cube([1, post_dia * (i / nholes), tile_th]);
+ }
+ }
+ }
+ }
+}
+
module Machine_NewRearProfile(){
// figures copied out of xfig edit boxes
// best not to edit the posbox size if poss - just move it
TestStrapPeg_any(60);
}
+module PostSpacer(){ ////toplevel
+ $fn = 50;
+ difference(){
+ cylinder(r= ply_hole_dia_real/2 - spacer_ext_slop,
+ h= spacer_height);
+ translate([0,0,-1])
+ cylinder(r= post_dia/2 + spacer_int_slop,
+ h= ply_th + 2);
+ }
+}
+
module Machine(){ ////toplevel
Machine_NewArm();
Machine_Curves();
union(){
hull(){
mirror([0,0,1])
- cylinder(r= leg_big_dia/2, height=leg_top_flat_z, $fn=100);
- translate([0,0, -leg_height])
+ cylinder(r= leg_big_dia/2, h=leg_top_flat_z, $fn=100);
+ translate([0,0, -leg_top_thick])
cylinder(r= leg_bot_dia/2, height=1, $fn=100);
}
- for (rot=[0:90:270]) rotate(rot) {
+ if (!TEST)
+ translate([0,0,-leg_height])
+ cylinder(r= leg_bot_mid_dia/2, h=leg_bot_thick);
+ for (rot=[0: 360/leg_n_fins : 359]) rotate(rot) {
hull(){
mirror([0,0,1]) translate([0, -leg_fin_top_w/2, 0])
cube([ leg_fin_top_rad - 0.1,
}
}
mirror([0,0,1]) translate([0,0,-1])
- cylinder(r= leg_hole_dia/2, h=leg_height+2, $fn=30);
+ cylinder(r= leg_hole_dia/2,
+ h= (!TEST ? leg_height+2 : leg_height/2),
+ $fn=30);
+ mirror([0,0,1]) translate([0,0,leg_top_thick - 0.1])
+ hull(){
+ cylinder(r= (!TEST ? leg_midspc_dia/2 : 0.1),
+ h= leg_height - leg_top_thick - leg_bot_thick + 0.2,
+ $fn=30);
+ if (TEST)
+ cylinder(r= leg_midspc_dia/2,
+ h= leg_height - leg_top_thick - leg_bot_thick
+ + (!TEST ? 0.2 : -leg_midspc_dia/2),
+ $fn=30);
+ }
+ cid_shear = (leg_fin_bot_w - leg_fin_top_w)/2 /
+ (leg_height -leg_fin_bot_flat_z);
+ multmatrix([[ 1, 0, 0, leg_midspc_dia/2 ],
+ [ 0, cid_shear,
+ 1, -leg_fin_bot_w/2 ],
+ [ 0, 1, 0, -leg_height + leg_fin_bot_flat_z ],
+ [ 0, 0, 0, 1 ]])
+ Commitid_BestCount([ leg_big_dia/2 - leg_midspc_dia/2,
+ leg_height - leg_fin_bot_flat_z
+ - leg_top_thick ]);
+ if (!TEST)
+ for (rot=[45: 360/leg_n_tubules : 359]) rotate(rot) {
+ mirror([0,0,1]) translate([ leg_tubule_pos_rad, 0, -1])
+ cylinder(r= leg_tubule_dia/2, h=leg_height+2, $fn=20);
+ }
}
}