X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=lock-inframe-bracket.scad;h=f1505675bb1a3bf5c4efc528ce1921e53e7c0cdb;hp=b688252eda9bb38be3beee4e13efba54a8201633;hb=37e6240dbeb35539d789f702ebb41d2cae072a6d;hpb=fb47c4fceb9627219c6716a4084f82ec21a38f27 diff --git a/lock-inframe-bracket.scad b/lock-inframe-bracket.scad index b688252..f150567 100644 --- a/lock-inframe-bracket.scad +++ b/lock-inframe-bracket.scad @@ -10,14 +10,15 @@ lock_w = 42.5 + 0.5; lock_d = 28.0 + 0.5; main_h = 45.0; backflange_d = 12; +backflange_hole_dy = -1; lockshaft_dia = 14.35; cliprecess_h = 16; total_h = 45; -back_gap = 14.5; -main_th = 3.25; -tube_th = 2.50; +back_gap = 12.5; +main_th = 3.50; +tube_th = 4.00; midweb_d = 3; clip_th = 3.5; @@ -27,6 +28,8 @@ clip_d = 22.0; mountscrew_dia = 4 + 0.5; clipbolt_dia = 5 + 0.6; +mountscrew_washer = 10; + backflange_th = 4.5; $fn=50; @@ -35,15 +38,18 @@ join_cr = 9; tube_rear_extra_th = 1; -divide_shaft_w = 1.5; +divide_shaft_w = 1.75; divide_shaft_l = 1.5; -divide_head_dx = 1.5; +divide_head_dx = 1.75; divide_head_th = 1.5; divide_gap = 0.50; -divide_heads = 1; +divide_heads = 2; + +divide_angle = 26; +divide_fudge_r = 4.75; +divide_around = 3.5; -divide_angle = 35; -divide_fudge_r = 3; +backflange_angle = 20; // calculated @@ -52,7 +58,7 @@ front_th = main_th; tube_or = tube_dia/2 + tube_th; back_ohw = back_gap/2 + backflange_th; -backflange_ymin = tube_or+backflange_d; +backflange_ymin = tube_dia/2 + backflange_d; lock_0y = tube_dia/2 + lock_d/2 + midweb_d; lock_0x = lock_w/2 - lock_d/2; @@ -91,35 +97,68 @@ module JoinCircs(jr){ } } -module DividePlan(){ - w = divide_shaft_w; - g = divide_gap; - l = divide_shaft_l + g; - t = divide_head_th + g; - dx = divide_head_dx; - for (m=[0,1]) mirror([m,0]) { - translate([w, 0]) square([10, g]); - for (i=[0:divide_heads-1]) { - translate([w, i*(l + t)]) { - translate([0, 0]) square([g, l + g]); - translate([0, l]) square([divide_head_dx + g, g]); - translate([dx, l]) square([g, t + g]); - translate([0, l + t]) - square([divide_head_dx + g, g]); +module DivideHook(){ ////toplevel + w = tube_th/2; + d = divide_gap; + + translate([-1,0] * (w + d + w)){ + for (sx=[-1,+1]) + translate([-(w + w+d) * sx, 0]) circle(r= w); + difference(){ + circle(r = 3*w + d); + circle(r = w + d); + translate([-10*w, -10*w]) square([20*w, 10*w]); + } + } +} + +module DivideCut(){ + w = tube_th/2; + d = divide_gap; + br = tube_dia/2 + tube_th; + + difference(){ + offset(r=divide_gap) DivideHook(); + DivideHook(); + translate([-2*w,0]) mirror([0,1]) square([4*w, 4*w]); + } +} + +module DivideCutB(){ + w = tube_th/2; + d = divide_gap; + br = tube_dia/2 + tube_th; + + intersection(){ + translate([br - tube_th/2,0]) { + difference(){ + circle(r=br + d); + circle(r=br); } } - translate([-0.1, (l + t) * divide_heads]) - square([w + g, g]); + translate([-2*w, 0]) mirror([0,1]) square(4*w); + } +} + +module DivideSurround(){ + w = tube_th/2; + d = divide_gap; + + offset(r= w*2) { + hull() { + DivideCut(); + translate([-(4*w + 2*d), 8*w]) circle(r=w); + } } } -module DividePlanInPlace(){ +module DivideInPlace(){ rotate([0,0, -divide_angle]) - translate([ -tube_dia/2 -tube_th/2 - divide_fudge_r, 0]) - DividePlan(); + translate([ -tube_dia/2 -tube_th/2, 0]) + children(); } -module MainPlan(){ +module MainPlan(){ ////toplevel difference(){ union(){ difference(){ @@ -129,7 +168,8 @@ module MainPlan(){ translate([0, -t]) circle(r = tube_or); } - translate([-back_ohw,0]) mirror([0,1]) + rotate([0,0, backflange_angle]) + translate([-back_ohw,0]) mirror([0,1]) square([back_ohw*2, backflange_ymin]); translate([0, lock_0y]){ @@ -142,26 +182,23 @@ module MainPlan(){ } } - translate([-back_gap/2,1]) mirror([0,1]) + rotate([0,0, backflange_angle]) + translate([-back_gap/2,1]) mirror([0,1]) square([back_gap, backflange_ymin+2]); - translate([0, lock_0y]){ - oval([lock_w/2, lock_d/2]); - } - JoinCircs(join_cr); } - hull(){ - minkowski(){ - DividePlanInPlace(); - circle(5); - } - } + DivideInPlace() DivideSurround(); } + translate([0, lock_0y]){ + oval([lock_w/2, lock_d/2]); + } + circle(r = tube_dia/2); - DividePlanInPlace(); + DivideInPlace() DivideCut(); + DivideInPlace() DivideCutB(); } } @@ -206,18 +243,24 @@ module ExtrudeClipElevation(extra=0){ children(0); } -module ThroughHole(r, y, z) { - translate([-50, y, z]) +module ThroughHole(r, y, z, x=-50) { + translate([x, y, z]) rotate([0, 90, 0]) cylinder(r=r, h=100, $fn=20); } -module ThroughHoles(){ +module MountingHoleCylinders(r, x=-50){ for (z=[ 1/4, 3/4 ]) { - ThroughHole( mountscrew_dia/2, - -tube_or -0.5*backflange_d, - total_h * z ); + rotate([0,0, backflange_angle]) + ThroughHole( r, + -tube_dia/2 -0.5*backflange_d + backflange_hole_dy, + total_h * z, + x); } +} + +module ThroughHoles(){ + MountingHoleCylinders(mountscrew_dia/2); ThroughHole( clipbolt_dia/2, lock_0y + lock_d/2 + clip_d/2 + front_th/2, @@ -234,14 +277,14 @@ module MainPositive(){ } } -module Bracket(){ //// toplevel +module Bracket(){ ////toplevel difference(){ MainPositive(); ThroughHoles(); } } -module TestTopEdge(){ //// toplevel +module TestTopEdge(){ ////toplevel intersection(){ translate([0,0, -total_h]) translate([0,0, 4]) @@ -251,7 +294,7 @@ module TestTopEdge(){ //// toplevel } } -module TestClipBoltHole(){ //// toplevel +module TestClipBoltHole(){ ////toplevel intersection(){ union(){ translate([0, 0, -5]) @@ -264,6 +307,19 @@ module TestClipBoltHole(){ //// toplevel } } +module Demo(){ ////toplevel + Bracket(); + color("blue") MountingHoleCylinders(mountscrew_dia/2 - 0.1); + color("black") MountingHoleCylinders(mountscrew_washer/2, + back_ohw + 0.25); +} + +module DivideDemo(){ ////toplevel + color("black") translate([0,0,-2]) MainPlan(); + color("grey") DivideInPlace() DivideHook(); + color("blue") translate([0,0,-4]) DivideInPlace() DivideCut(); +} + //MainPlan(); //ClipElevationPositive(); //ClipElevation(); @@ -271,7 +327,6 @@ module TestClipBoltHole(){ //// toplevel //%ThroughHoles(); //TestTopEdge(); //TestClipBoltHole(); -//DividePlan(); -Bracket(); +//Bracket();