X-Git-Url: http://challenge-bot.com/repos/?a=blobdiff_plain;f=3d-printables%2Fsonar-table-top-holder.scad;h=23279e40736dbab68368ba2076d4f6a0c7e70093;hb=180a0f6f6e33818372b49e01931ce8264f838cbc;hp=ef9e0f51af448fc803269f75936b216015d32ca4;hpb=8b34090911ea98fc28f35e5c77aaca50855e8ff1;p=challenge-bot diff --git a/3d-printables/sonar-table-top-holder.scad b/3d-printables/sonar-table-top-holder.scad index ef9e0f5..23279e4 100644 --- a/3d-printables/sonar-table-top-holder.scad +++ b/3d-printables/sonar-table-top-holder.scad @@ -4,57 +4,107 @@ // https://gitorious.org/ozzloy/challenge-bot // https://github.com/waynegramlich/challenge-bot +/* + this holds an hc-sr04 sonar sensor to a 3/16 inch deck. + http://fritzing.org/projects/hc-sr04-project + it can hold the sonar sensor either facing down, or forwards. + when facing down, it can detect if it passes over the edge of a table. + when facing forwards, it can detect and follow something in front of it. + */ + $fn = 60; -// 3/16 inch in mm deck_depth = 4.7625; -// 1/4 inch in mm = 6.35 -// subtract a little to be a squeeze fit -deck_depth = 4.7625 - 0.4; -sonar_plate_width = 20; -// sonar sensor measurements taken with calipers: -// 10.82 in between, 42.33 outside, 15.82 diameter -// measured diameter of 15.82 with calipers, -// but when printed ends up being too small -sonar_sensor_radius = 15.82 / 2 + 0.3; -sonar_sensor_height = 13.8; -between_sensor_centers = 15.82 + 10.82; -sonar_plate_length = 3 + between_sensor_centers + sonar_sensor_radius + 3; -sonar_holder_length = sonar_plate_length + 10; -sonar_holder_width = sonar_plate_width + 3; -sonar_holder_depth = 4; - -deck_holder_length = 30; - -module sensors(){ - translate([between_sensor_centers / 2, 0, 0]){ - cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);} - translate([-between_sensor_centers / 2, 0, 0]){ - cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}} - -module sensor_holder(){ +include +use +oshw_dy = 120.366; +oshw_dx = 133.888; + +module sonar_holder_2d() { + difference() { + square([sonar_holder_length, sonar_holder_width]); } } + +module sonars(){ + translate([between_sonar_centers / 2, 0, 0]){ + cylinder(r = sonar_radius, h = sonar_height);} + // for the variance with which the physical sonar cylinders are placed + translate([between_sonar_centers / 2 - between_sonar_centers_variance, 0, 0]){ + cylinder(r = sonar_radius, h = sonar_height); + translate([0, -sonar_radius, 0]){ + cube([between_sonar_centers_variance, sonar_diameter, sonar_height]);}} + translate([-between_sonar_centers / 2, 0, 0]){ + cylinder(r = sonar_radius, h = sonar_height);}} + +module sonar_holder(){ + elbow_length = deck_depth - 0.5; + rounded_corner_radius = buffer; difference(){ cube([sonar_holder_length, sonar_holder_width, sonar_holder_depth]); translate([sonar_holder_length / 2, sonar_holder_width / 2, -0.05]){ - sensors();}} + sonars();} + translate([sonar_holder_length, + sonar_holder_width, + 0]){ + corner_rounder(rounded_corner_radius, + sonar_holder_depth, + "bottom-right");}} translate([sonar_holder_length, 0, 0]){ - cube([sonar_holder_depth + 0.7, deck_depth, deck_depth - 0.7]); - translate([sonar_holder_depth + 0.7, 0, 0]){ - // subtract a little bit (0.3) to make it fit - cube([deck_depth - 0.7, sonar_holder_width, deck_depth - 0.7]);}}} + cube([elbow_length, deck_depth, sonar_holder_depth]); + translate([elbow_length, 0, 0]){ + linear_extrude(height = sonar_holder_depth){ + polygon([[ 0, 0], + [sonar_holder_depth, 0], + [sonar_holder_depth, sonar_holder_width / 2], + [ 0, + sonar_holder_width / 2 + sonar_holder_depth]]);} + translate([0, (sonar_holder_width + sonar_holder_depth) / 2, 0]){ + cube([sonar_holder_depth / 2, + (sonar_holder_width - sonar_holder_depth) / 2 + 0.8, + sonar_holder_depth]);} + translate([-1.7, sonar_holder_width + 0.8, 0]){ + linear_extrude(height = sonar_holder_depth){ + polygon([[ 0, 0], + [sonar_holder_depth / 2 + 1.7, 4], + [sonar_holder_depth / 2 + 1.7, 0]]);}}}}} module deck_holder(){ deck_holder_width = sonar_holder_width - deck_depth; - cube([deck_holder_length, sonar_holder_depth, deck_holder_width]); - cube([sonar_holder_depth, - sonar_holder_depth * 2 + deck_depth, - deck_holder_width]); - translate([0, sonar_holder_depth + deck_depth, 0]){ - cube([deck_holder_length, sonar_holder_depth, deck_holder_width]);} - translate([sonar_holder_depth + deck_depth, 0, 0]){ - cube([sonar_holder_depth, - sonar_holder_depth * 2 + deck_depth, - deck_holder_width]);}} - -translate([0, sonar_holder_depth * 2 + deck_depth + 2, 0]){ - sensor_holder();} -deck_holder(); + deck_holder_height = sonar_holder_depth * 2 + deck_depth; + linear_extrude(height = deck_holder_width){ + difference(){ + square([deck_holder_length, deck_holder_height]); + translate([sonar_holder_depth, sonar_holder_depth]){ + square(deck_depth);} + translate([deck_holder_height, sonar_holder_depth]){ + square([deck_holder_length - (deck_holder_height), deck_depth]);}}} + translate([deck_holder_length - oshw_dy * 0.05, 0, deck_holder_width / 2]) + scale([0.1, 1, 0.1]) + rotate(v = [1, 0, 0], a = 90) + rotate(90) + linear_extrude(height = 0.5) + oshw(); + translate([deck_holder_length - oshw_dy * 0.05, + deck_holder_height + 0.5, + deck_holder_width / 2]) + rotate(v = [1, 0, 0], a = 90) + rotate(90) + scale([0.1, 0.1, 1]) + linear_extrude(height = 0.5) + oshw();} + +module corner_rounder_2d(radius, corner_name="top-left"){ + rotate_for_corner = (corner_name == "top-left") ? 0 : + ((corner_name == "top-right") ? -90 : + ((corner_name == "bottom-left") ? 90 : + ((corner_name == "bottom-right") ? 180 : + 1 / 0))); + rotate(rotate_for_corner){ + difference (){ + square(radius); + translate([radius, radius]){ + circle(radius);}}}} + +module corner_rounder(radius, height, corner_name="top-left"){ + linear_extrude(height = height){ + corner_rounder_2d(radius, corner_name);}} + +sonar_holder();