X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=pattress-boxes-3-cover.scad;h=7c1d4b892cf63d56ddcb2d6e9afc36a5b30d1e34;hp=d3f5b12f3a075cd854fb9959bdd85729ca314ff9;hb=5967e597a19fe455e0c2e1cc6fcdf922c6509198;hpb=f8652a9ce0ef8039a107080a44d2d96f05b77a1e diff --git a/pattress-boxes-3-cover.scad b/pattress-boxes-3-cover.scad index d3f5b12..7c1d4b8 100644 --- a/pattress-boxes-3-cover.scad +++ b/pattress-boxes-3-cover.scad @@ -8,7 +8,7 @@ lid_fatbox_overlap = 12; lid_thinbox_h = 9; lid_fatbox_h = 24; -lid_fatbox_switches_h = 6+2; +lid_fatbox_switches_h = 6+4; lid_max_switches_w = 70; lid_switches_y_slop = 3; @@ -16,24 +16,29 @@ lid_switches_y_slop = 3; total_len = 260; thinbox_len = 87; +rail_overlap = 8; + lid_top_wall = 1.5; lid_front_wall = 1.5; lid_side_wall = 1.5; peg_engage_depth = 1; -peg_engage_dia = 6.0; +peg_engage_dia = 6.5; peg_main_dia = 9; peg_max_dia = 15; peg_inner_dia = 3.5; peg_top_thick = 1; peg_straight_len = 3; -peg_inner_slop = 0.2; -peg_outer_slop = 0.1; +$peg_inner_slop = 0.75; +$peg_outer_slop = -0.9; +$peg_outer_slop_engage = 0.1; peg_slope = 1; lid_side_slop = 0.5; +lid_rail_behindslop = 0.5; +lid_rail_strongwall = 2.5; // computed @@ -43,27 +48,46 @@ lid_inner_min_h = lid_fatbox_overlap + lid_fatbox_switches_h; lid_inner_kink = [thinbox_len, thinbox_len*2]; -lid_inner_w = patbox_side + lid_side_slop; - -lid_rail_w = (lid_inner_w - lid_max_switches_w)/2 - lid_switches_y_slop; +lid_inner_w_nom = patbox_side; +lid_inner_w = lid_inner_w_nom + lid_side_slop * 2; -lid_rail_h = lid_fatbox_switches_h; +lid_seatline_w = (lid_inner_w - lid_max_switches_w)/2 - lid_switches_y_slop; -echo(lid_rail_w); +lid_seatline_h = lid_fatbox_switches_h; peg_main_height = peg_straight_len + (peg_max_dia - peg_main_dia)/2/peg_slope; -echo(peg_main_height); +thinbox_front_z = lid_fatbox_switches_h + lid_fatbox_h - lid_thinbox_h; + +raillen = patbox_side/2 + rail_overlap; module LidSideProfile(){ polygon([[-lid_top_wall, lid_inner_max_h], - [lid_inner_kink[0], lid_inner_max_h], - [lid_inner_kink[1], lid_inner_min_h], + [min(lid_inner_kink[0],total_len), lid_inner_max_h], + [min(lid_inner_kink[1],total_len), lid_inner_min_h], [total_len, lid_inner_min_h], [total_len, -lid_front_wall], [-lid_top_wall, -lid_front_wall]]); } +module RailProfile(lslop=0.1){ + yt_base = thinbox_front_z; + yt = yt_base - lid_rail_behindslop; + pegx = (lid_inner_w_nom - patbox_centres)/2; + sw = lid_rail_strongwall; + + polygon([[-lslop, yt], + [pegx - peg_main_dia/2, yt], + [pegx - peg_main_dia/2, yt_base - peg_straight_len], + [sw, + yt_base - peg_straight_len - (pegx - peg_main_dia/2)/peg_slope + +sw], + [sw, + lid_seatline_h - 1], + [-lslop, + lid_seatline_h - 1]]); +} + module LidSide(){ overlap = [0.1, 0.1, 0.1]; @@ -72,9 +96,9 @@ module LidSide(){ linear_extrude(height= lid_side_wall) LidSideProfile(); - // rail + // seatline translate(-overlap) - cube(overlap + [total_len, lid_rail_w, lid_rail_h]); + cube(overlap + [total_len, lid_seatline_w, lid_seatline_h]); // lid front translate([-0.1, -0.1, -lid_front_wall]) @@ -83,25 +107,95 @@ module LidSide(){ // lid top translate([-lid_top_wall, -lid_side_wall, -lid_front_wall]) cube([lid_top_wall, lid_inner_w/2 + 10, lid_front_wall + lid_inner_max_h]); + + // rail + rotate([90,0,90]) + translate([0,0,-0.1]) + linear_extrude(height=raillen+0.1) //todo + RailProfile(); + + // rail end + translate([raillen, 0,0]) + intersection(){ + rotate_extrude($fn=50) + RailProfile(lslop=0); + translate([0, 25-0.1, 0]) + cube(50, center=true); + } +} + +module Lid(){ ////toplevel + for (m=[0,1]) + mirror([0,m,0]) + translate([0, -lid_inner_w/2, 0]) LidSide(); } module PegProfile(){ - polygon([[-peg_engage_depth, (peg_engage_dia - peg_outer_slop)/2], - [0, (peg_engage_dia - peg_outer_slop)/2], - [0, (peg_main_dia - peg_outer_slop)/2], - [peg_straight_len, (peg_main_dia - peg_outer_slop)/2], - [peg_main_height, (peg_max_dia - peg_outer_slop)/2], - [peg_main_height+peg_top_thick, (peg_max_dia - peg_outer_slop)/2], - [peg_main_height+peg_top_thick, (peg_inner_dia + peg_inner_slop)/2], - [-peg_engage_depth, (peg_inner_dia + peg_inner_slop)/2]]); + polygon([[-peg_engage_depth, (peg_engage_dia - $peg_outer_slop_engage)/2], + [0, (peg_engage_dia - $peg_outer_slop_engage)/2], + [0, (peg_main_dia - $peg_outer_slop)/2], + [peg_straight_len, (peg_main_dia - $peg_outer_slop)/2], + [peg_main_height, (peg_max_dia - $peg_outer_slop)/2], + [peg_main_height+peg_top_thick, (peg_max_dia - $peg_outer_slop)/2], + [peg_main_height+peg_top_thick, (peg_inner_dia + $peg_inner_slop)/2], + [-peg_engage_depth, (peg_inner_dia + $peg_inner_slop)/2]]); } -module Peg(){ +module Peg(){ ////toplevel + echo($peg_outer_slop_engage); rotate_extrude($fn=50) rotate([0,0,-90]) PegProfile(); } +module Pegs(){ ////toplevel + baseslop = 0.1; + dslops = [0, -0.5, -1.0, -1.5]; + stride = peg_max_dia + 4; + for (i=[0:len(dslops)-1]) { + translate([i*stride,0,0]) + assign($peg_outer_slop_engage= baseslop + dslops[i]) + Peg(); + } +} + +module AtFixingCentres(){ + for (fc=[-1,+1]) { + translate([patbox_side/2 + fc*patbox_centres/2, + patbox_side/2, + 0]) + children(); + } +} + +module TopPattressBox(){ + difference(){ + translate([0,0, -lid_thinbox_h]) + cube([patbox_side, patbox_side, lid_thinbox_h]); + AtFixingCentres(){ + translate([0,0,-10]) cylinder(r=peg_engage_dia/2, h=20); + } + } +} + +module Demo(){ + Lid(); + translate([0,0, thinbox_front_z]) + rotate([0,180,0]) translate([0, -patbox_side/2, 0]) + rotate([0,0,90]) union(){ + %TopPattressBox(); + color("blue") AtFixingCentres(){ + rotate([180,0,0]) Peg(); + } + } +} + //LidSide(); //PegProfile(); -Peg(); +//Peg(); +//Pegs(); +//TopPattressBox(); +//RailProfile(); +//Demo(); +//Lid(); +//translate([0,0,-lid_fatbox_switches_h]) Lid();