From 6a7062ce9a8dc6e0944175d161ab2960a1353404 Mon Sep 17 00:00:00 2001 From: daniel watson Date: Tue, 3 Dec 2013 20:31:34 -0800 Subject: [PATCH] 8. grip ball better with taller wall --- 3d-printables/caster-standoff.scad | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/3d-printables/caster-standoff.scad b/3d-printables/caster-standoff.scad index 39ab746..27288fa 100644 --- a/3d-printables/caster-standoff.scad +++ b/3d-printables/caster-standoff.scad @@ -7,7 +7,17 @@ // use 10 ish for development, 60 or so for printing $fn = 60; -standoff_radius = 14.732 / 2; // 0.580 / 2 inches from spec sheet +/* measured with calipers */ +ball_diameter = 12.7 + 1.25; +ball_radius = ball_diameter / 2; + +wall_thickness = 1; +holder_height = (25 / 32) * ball_diameter + wall_thickness; + +holder_radius = ball_radius + wall_thickness; +holder_diameter = holder_radius * 2; + +standoff_radius = holder_radius; // 0.580 / 2 inches from spec sheet standoff_height = 48; // eyeballed // eyeballed caster flange height, (0.580/5) inches, times 2 to be stronger @@ -45,14 +55,13 @@ module deck_flange_reinforcement(){ deck_flange_radius]);}}}}} module ball_holder(){ + gap = wall_thickness * 4; difference (){ cylinder(r = holder_radius, h = holder_height); translate([0, 0, ball_radius + wall_thickness]){ sphere(r = ball_radius);} translate([0, 0, holder_height / 2 + wall_thickness]){ - cube([holder_diameter + 0.1, - wall_thickness * 2, - holder_height], + cube([holder_diameter + 0.1, gap, holder_height], center = true);}}} module caster_standoff(){ -- 2.30.2