X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=crossbar-computer-led-mount.scad;h=218d007e58ef5c5952e8afe26fe808664c4058af;hp=bce69402a73deaeebf1ffe2817c83dab89a4223a;hb=95fe735a02a838cec728e723577ee4d1f6b10470;hpb=cebd7c31fa6a2fceeb3ade69116fd7e62b5cb45f diff --git a/crossbar-computer-led-mount.scad b/crossbar-computer-led-mount.scad index bce6940..218d007 100644 --- a/crossbar-computer-led-mount.scad +++ b/crossbar-computer-led-mount.scad @@ -3,23 +3,45 @@ led_dia = 5 + 0.6; led_depth = 5; -led_tip_z = 70; +led_tip_height_above_crossbar = 70; led_angle = -60; +crossbar_dia = 25; // fixme vert_space_inside = 8; backfront_space_inside = 12; +width_space_inside = 10; backfront_mate_size = 25; tower_frontheight = 20; -tower_width = 18; tower_slot_width = 3; +cableclamp_ctie_width = 3 + 0.5; +cableclamp_ctie_thick = 2 + 0.5; + +lidclamp_ctie_width = 4.0 + 0.5; +lidclamp_ctie_thick = 2.5 + 0.5; + +base_ctie_width = 4.0 + 0.5; +base_ctie_thick = 2.5 + 0.5; + +tube_ctie_width = 5 + 0.5; +tube_ctie_thick = 3 + 0.5; + // tuning tower_over_angle = 45; tower_wall_thick = 1.6; tower_base_height = 10; tower_forehead_angle = 30; +lid_wall_thick = 1.6; +lid_slop = 0.75; +lidclamp_cableclamp_ctie_between = 0; +base_ctie_anchor = 5; +tube_ctie_anchor = 5; +protrusion_size = 2; +protrusion_none_frontback = 10; +protrusion_slop = 0.5; +cableclamp_ctie_z = tower_frontheight/2; //--- tests --- @@ -47,15 +69,32 @@ module Tests(){ ////toplevel //--- real thing --- +// calculated + tower_overhang = led_dia * 2.5; +tower_width = width_space_inside + tower_wall_thick*2; tower_over_max_y = tower_overhang * sin(tower_over_angle); tower_over_max_z = tower_frontheight + tower_overhang * cos(tower_over_angle); tower_total_max_z = tower_over_max_z + vert_space_inside + led_depth; tower_rearwall_y = -(backfront_space_inside + tower_wall_thick); - +led_head_y = tower_over_max_y/2; +led_head_z = tower_frontheight + tower_overhang*sin(tower_over_angle)/2; backfront_mate_extra = (backfront_mate_size - (-tower_rearwall_y)); +tower_height_contribution = led_head_z + tower_base_height; + +base_ctie_anchor_eff = base_ctie_anchor+base_ctie_thick/2; +tube_ctie_anchor_eff = tube_ctie_anchor+tube_ctie_thick/2; + +base_width = 0.7 * crossbar_dia; +base_backfront = backfront_mate_extra - tower_rearwall_y; +base_height = led_tip_height_above_crossbar - tower_height_contribution; + +protrusion_frontback = base_backfront - protrusion_none_frontback; + +echo(tower_height_contribution, base_height); + module TowerWallCrossSection(){ // generates a 2D shape - a polygon // x is what is going to be -y @@ -69,7 +108,8 @@ module TowerWallCrossSection(){ [-tower_rearwall_y, tower_total_max_z], [-tower_rearwall_y, 0], [-tower_rearwall_y, -tower_base_height], - [-backfront_mate_extra, -tower_base_height]]); + [-backfront_mate_extra, -tower_base_height]], + convexity=5); } module TowerWallSomeEdge(front){ @@ -87,8 +127,7 @@ module TowerBulkCrossSection(){ intersection(){ TowerWallCrossSection(); union(){ - translate([-tower_over_max_y/2, - tower_frontheight + tower_overhang*sin(tower_over_angle)/2]) + translate([-led_head_y, led_head_z]) circle(r = led_depth); TowerWallSomeEdge(true); translate([-50, -50]) @@ -102,7 +141,7 @@ module TowerRearWallCrossSection(){ TowerWallCrossSection(); union(){ intersection(){ - translate([0,-10]) square([100, 10+tower_frontheight]); + translate([0,-10]) square([100, 10+led_head_z]); TowerWallSomeEdge(false); } TowerBulkCrossSection(); @@ -121,24 +160,139 @@ module TowerMain(){ for (mir=[0,1]) mirror([mir,0,0]) rotate([90,0,-90]) { translate([0,0, tower_width/2-tower_wall_thick]) - linear_extrude(height=tower_wall_thick) + linear_extrude(height=tower_wall_thick) { TowerWallCrossSection(); + } translate([0,0,-1]) linear_extrude(height=tower_width/2+0.9) - TowerBulkCrossSection(); + union(){ + TowerBulkCrossSection(); + hull(){ + intersection(){ + TowerWallCrossSection(); + translate([-30, -30]) + square([30 + 0.1, 30 + tower_frontheight]); + } + } + } translate([0,0, tower_slot_width/2]) linear_extrude(height=(tower_width - tower_slot_width)/2 - 0.2) TowerRearWallCrossSection(); } } -module Tower(){ +module LedHole(){ + translate([0, led_head_y, led_head_z]) + rotate([90 + led_angle]) + translate([0,0,-10]) + cylinder(r=led_dia/2, h=led_depth+0.1+10, $fn=30); +} + +module Tower(){ ////toplevel difference(){ TowerMain(); + LedHole(); + // passages for cable ties + translate([0, + tower_rearwall_y/2, + cableclamp_ctie_z + + cableclamp_ctie_width/2 + lidclamp_ctie_thick/2 + + lidclamp_cableclamp_ctie_between]) + cube([50, lidclamp_ctie_width, lidclamp_ctie_thick], center=true); + translate([0, + (backfront_mate_extra+tower_rearwall_y)/2, + -tower_base_height + + max(protrusion_size + protrusion_slop + 0.1, + base_ctie_anchor_eff)]) + cube([50, base_ctie_width, base_ctie_thick], center=true); + for (mir=[0,1]) + mirror([mir,0,0]) { + translate([tower_width/4, 20, cableclamp_ctie_z]) + cube([cableclamp_ctie_thick, + tower_wall_thick*2+1+40, + cableclamp_ctie_width], + center=true); + } + translate([0, tower_rearwall_y, -tower_base_height]) + BaseRegistrationProtrusion(protrusion_slop); } } +module TowerMainHull(){ + hull(){ TowerMain(); } +} + +module Lid(){ + intersection(){ + difference(){ + minkowski(){ + TowerMainHull(); + sphere(r=lid_wall_thick+lid_slop, $fn=4); + } + minkowski(){ + TowerMainHull(); + sphere(r=lid_slop, $fn=4); + } + } + translate([-50,-50,led_head_z]) cube([100,100,100]); + } +} + +module LidT(){ ////toplevel + rotate([180,0,0]) Lid(); +} + +module BaseRegistrationProtrusion(extra){ + size = protrusion_size + extra; + translate([0, base_backfront/2, 0]){ + hull(){ + translate([0,0, -0.5]) + cube([protrusion_size*2, protrusion_frontback, 1.0], center=true); + translate([0, 0, protrusion_size-0.5]) + cube([0.05, protrusion_frontback-protrusion_size*2, 1.0], center=true); + } + } +} + +module Base(){ ////toplevel + difference(){ + mirror([0,0,1]){ + hull(){ + translate([-tower_width/2, 0, 0]) + cube([tower_width, base_backfront, 0.1]); + translate([-base_width/2, 0, base_height]) + cube([base_width, base_backfront, crossbar_dia/2]); + } + } + translate([-50, base_backfront/2, -base_ctie_anchor_eff]) + cube([100, base_ctie_width, base_ctie_thick], center=true); + translate([-50, base_backfront/2, -base_height + tube_ctie_anchor_eff]) + cube([100, tube_ctie_width, tube_ctie_thick], center=true); + translate([0, -1, -(base_height + crossbar_dia/2)]) + rotate([-90,0,0]) + cylinder(r=crossbar_dia/2, h=101); + } + BaseRegistrationProtrusion(0.0); +} + +module BaseT(){ ////toplevel + rotate([90,0,0]) Base(); +} + +module Demo(){ + Tower(); + translate([0,0, 25]) Lid(); + translate([0, tower_rearwall_y, -(tower_base_height+5)]) Base(); +} + //TowerCrossSectionDemo(); //TowerWallSomeEdge(false); //TowerWallFrontEdge(); +//TowerMainHull(); +//LidT(); Tower(); +//Lid(); +//BaseRegistrationProtrusion(); +//Base(); +//BaseT(); +//Demo();