X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=scaffold-clamp-common.scad;h=4e9f36759e267902306214f23f3b5aca9536a674;hb=ba7c5b240dcdab5fa3f4e3f7823bb828551471f0;hp=51f0d8ce422679a84a25c51bd98b912eefb59c11;hpb=0f68fb954dddaf11e5bf3ea473b345f60d7e37a4;p=reprap-play.git diff --git a/scaffold-clamp-common.scad b/scaffold-clamp-common.scad index 51f0d8c..4e9f367 100644 --- a/scaffold-clamp-common.scad +++ b/scaffold-clamp-common.scad @@ -10,9 +10,11 @@ pin_gap = 1.5; // around smooth_r = 15; -bolt_dia = 5 + 0.75; +bolt_dia = 5; bolt_flat = 10 + 1; +nbolts = 2; + open_gap = 10; hinge_unit = 10; @@ -20,20 +22,45 @@ hinge_z_gap = 1; hinge_units = 4; +bolt_gap = 1.0; // total, on both sides + // ---------- vhook ---------- vhook_th = 14; +// ---------- cleat ---------- + +cleat_frames = 10; +cleat_curve_r = 200; +cleat_horn_l = 40; +cleat_horn_d_min = [10, 12]; +cleat_horn_d_max = [12, 14]; +cleat_height = 25; +cleat_stem_l = 20; + +cleat_overlap = (1-cos(60)); + // ---------- hhook ---------- -hhook_inner = 40; +hhook_inside = 40; hhook_th = 4; +hhook_l = 40; -// ========== calculated ========== +// ========== defaults ========== +pin_head_th = th/2; pin_dia = th; +pin_hole_dia = pin_dia/2; +pin_tail = pin_hole_dia + pin_head_th + hinge_z_gap*3; + +// ========== calculated ========== + +TAU = PI*2; + hole_dia = th + pin_gap; +bolt_hole_r = (bolt_dia + bolt_gap)/2; + main_r = tube_dia/2 + th; hinge_gap = pin_gap; @@ -42,7 +69,7 @@ hinge_o_r = 0.5 * hole_dia + th; hinge_x = -0.5 * tube_dia - hinge_o_r; bolt_x = 0.5 * tube_dia + th + bolt_flat * 0.5; -max_x = bolt_x + max(0.5 + bolt_dia + th, 0.5 * bolt_flat/2); +max_x = bolt_x + max(bolt_hole_r + th, 0.5 * bolt_flat/2); flats_y = open_gap/2 + th; @@ -54,6 +81,8 @@ max_z = +total_z/2; pin_flatten = pin_dia/2 * (1 - cos(45)); +bolt_stride = total_z / nbolts; + // calculated - vhook vhook_inside = 15; @@ -64,6 +93,23 @@ vhook_y0 = -max(main_r, (tube_dia/2 + vhook_th)); vhook_ctr = vhook_y0 - vhook_inside/2; vhook_outer_dia = vhook_inside + vhook_th*2; +// calculated - cleat + +cleat_horn_tl = cleat_horn_l + cleat_stem_l/2; + +vcleat_dz = max(0, + cleat_horn_tl + + cleat_horn_d_min[0]/2 + - cleat_horn_d_min[0]/2 * cleat_overlap + - total_z/2 + ); + +// calculated - hhook + +hhook_outer_dia = hhook_inside + hhook_th*2; + +hhook_ctr = -max(main_r + hhook_inside/2, + tube_dia/2 + hhook_outer_dia/2); $fa = 3; $fs = 0.1; @@ -142,11 +188,11 @@ module HalfClampX(flatten=false){ linextr(0, hinge_unit) MainPlanA(flatten); } } - for (dz=[-1,+1]) { - translate([ bolt_x, 0, dz * total_z/4 ]) { + for (j=[0:nbolts-1]) { + translate([ bolt_x, 0, min_z + (j + 0.5) * bolt_stride ]) { translate([0, -tube_dia/2, 0]) rotate([-90,0,0]) - cylinder(r= bolt_dia/2, h= tube_dia); + cylinder(r= bolt_hole_r, h= tube_dia); translate([0, -flats_y, 0]) rotate([90,0,0]) cylinder(r= bolt_flat/2, h= tube_dia/2); @@ -174,7 +220,7 @@ module VHookHookMain(outer=false){ ////toplevel } } -module VHookPartA(){ ////toplevel +module VHookA(){ ////toplevel DummyA(); translate([0, vhook_ctr, 0]){ @@ -215,14 +261,143 @@ module VHookPlanDemo(){ } } +// ---------- cleat ---------- + +function cleat_frame_theta(s) = s * cleat_horn_tl / cleat_curve_r * 360/TAU; +function cleat_frame_z(s) = cleat_curve_r * (1 - cos(cleat_frame_theta(s))); +function cleat_frame_x(s) = cleat_curve_r * sin(cleat_frame_theta(s)); +function cleat_frame_r(s) = ( cleat_horn_d_min * s + + cleat_horn_d_max * (1-s) ) * 0.5; + +module CleatFrameSphere(r) { + scale([1, r[1]/r[0], 1]) + sphere(r= r[0]); +} + +module CleatFrame(s) { + r = cleat_frame_r(s); + translate([cleat_frame_x(s), 0, cleat_frame_z(s)]) + rotate([0, 90, 0]) + CleatFrameSphere(r); +} + + +module CleatHorn(){ + for (si=[0 : cleat_frames-2]) { + s0 = si / (cleat_frames-1); + s1 = (si+1) / (cleat_frames-1); + hull(){ + CleatFrame(s0); + CleatFrame(s1); + } + } +} + +module CleatBase(){ + frames = cleat_frames/2; + se = cleat_stem_l/2 / cleat_horn_tl; + r = cleat_frame_r(se); + + hull(){ + for (s = [-se, se]) { + for (z= [-(cleat_height + tube_dia/2), + cleat_frame_z(s)]) { + translate([cleat_frame_x(s), 0, z]) + linear_extrude(height=0.1) + scale([1, r[1]/r[0]]) + circle(r=r[0]); + } + } + } +} + +module VCleat(){ + intersection(){ + translate([0,0, vcleat_dz]){ + difference(){ + translate([0, -(main_r + cleat_height), 0]) { + rotate([0, -90, 90]) { + CleatBase(); + for (m=[0,1]) { + mirror([m,0,0]) { + CleatHorn(); + } + } + } + } + linextr(-cleat_stem_l, +cleat_stem_l) + circle(r = tube_dia/2 + 0.1); + } + } + translate([0,0, total_z * 0.5]) + cube(center=true, + (main_r + cleat_stem_l)*4 * [1,1,0] + + total_z * [0,0,2]); + } +} + +module VCleatA(){ ////toplevel + DummyA(); + VCleat(); +} + // ---------- hhook ---------- +module HHookHookPlan(){ + translate([0, hhook_ctr]){ + difference(){ + circle(r = hhook_outer_dia/2); + circle(r = hhook_inside/2); + rectfromto([+hhook_outer_dia, -hhook_outer_dia], + [0, +hhook_outer_dia]); + } + translate([0, -(hhook_inside/2 + hhook_th/2)]){ + hull(){ + for (x=[-0.1, hhook_l]) { + translate([x,0]) square(center=true, hhook_th); + } + } + } + } +} + +module HHookA(){ ////toplevel + DummyA(); + linextr(min_z, max_z) { + HHookHookPlan(); + } +} + module HHookPlanDemo(){ MainPlanA(); + HHookHookPlan(); } // ---------- misc ---------- +module PinSitu(){ ////toplevel + difference(){ + union(){ + translate([0,0, -pin_head_th]) + cylinder(r= pin_dia/2, h = total_z + pin_head_th + pin_tail); + mirror([0,0,1]) + cylinder(r= hinge_o_r - pin_gap, h = pin_head_th); + } + translate([0,0, total_z + pin_tail/2]) + rotate([0,90,0]) + translate([0,0, -pin_dia]) + cylinder(r= pin_hole_dia/2, h=pin_dia*2); + translate([pin_dia/2 * cos(45), -50, -pin_head_th*2]) + cube([50,100, total_z*2]); + } +} + +module Pin(){ ////toplevel + rotate([0,90,0]) { + PinSitu(); + } +} + module GeneralB(){ ////toplevel HalfClampX(true); } @@ -250,9 +425,20 @@ module PlanDemo(){ ////toplevel // translate([max_x - hinge_x + 20, 0]) color("blue") MainPlanA(); } +module DemoA(){ DummyA(); } + module Demo(){ ////toplevel color("red") rotate([180,0,0]) GeneralB(); - color("blue") DummyA(); + color("blue") DemoA(); + color("orange") translate([hinge_x, 0, min_z - hinge_z_gap]) + rotate([0,0,180]) PinSitu(); +} + +module DemoPair(){ ////toplevel + color("red") rotate([180,0,0]) DemoA(); + color("blue") DemoA(); + color("orange") translate([hinge_x, 0, min_z - hinge_z_gap]) + rotate([0,0,180]) PinSitu(); } //PlanDemo();