enabled circles and spokes on same gear, added option for entered hub and centered gear body, fixed additional test cases, improved test_gears to check more features
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skeptonomicon
parent
28fbdac168
commit
6f0ca2a57e
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@ -307,9 +307,11 @@ module gear (
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spoke_width=undef,
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spoke_thickness=undef,
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spoke_square=false,
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z_symmetry=false,
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centered_gear=false,
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centered_hub=false,
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bore_diameter=undef,
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circles=0,
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circle_diameter=undef,
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backlash=0,
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twist=0,
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involute_facets=0,
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@ -355,9 +357,10 @@ module gear (
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rim_width = (rim_width!=undef?rim_width:root_radius * .1);
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rim_radius = root_radius - rim_width;
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// Variables controlling the hub_diameter
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// Variables controlling the hub
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hub_thickness = (hub_thickness!=undef?(hub_thickness!=0?hub_thickness:gear_thickness):gear_thickness * 2);
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hub_diameter = (hub_diameter!=undef?hub_diameter:root_radius * .3);
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hub_base = (centered_hub == false)? 0 : rim_thickness/2 - hub_thickness/2;
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// Variables controlling the spokes
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spokes = spokes == undef? 0 : spokes;
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@ -372,19 +375,18 @@ module gear (
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//echo (str("spoke_width: ",spoke_width,", hub_diameter: ",hub_diameter, ", spoke_depth: ",spoke_depth));
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// Variables controlling the bore
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bore_diameter = (bore_diameter!=undef?bore_diameter:root_radius * .1);
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bore_diameter = bore_diameter!=undef?bore_diameter:root_radius * .1;
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// Variables controlling the circular holes in the gear.
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circles = spokes==0?circles:0;
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circle_orbit_diameter=hub_diameter/2+rim_radius;
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circle_orbit_curcumference=pi*circle_orbit_diameter;
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// Limit the circle size to 90% of the gear face.
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circle_diameter=
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min (
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0.70*circle_orbit_curcumference/circles,
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(rim_radius-hub_diameter/2)*0.9);
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circle_default_diameter = min (
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0.70*circle_orbit_curcumference/circles,
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(rim_radius+hub_diameter/2)*0.9);
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circle_diameter=(circle_diameter != undef)? circle_diameter : circle_default_diameter;
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echo(str("cir_orb_dia: ", circle_orbit_diameter, ", cir_orb_circumf: ", circle_orbit_curcumference, ", default cir dia: ",circle_default_diameter, ", cir_dia:",circle_diameter));
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difference()
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{
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union ()
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@ -402,29 +404,54 @@ module gear (
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half_thick_angle = half_thick_angle,
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involute_facets=involute_facets);
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//if we have a spoked gear, then the gear body must be removed.
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if (spokes>0)
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//if we have a 0 hub thickness, then hub must be removed
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if (hub_thickness == 0)
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translate ([0,0,-1])
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cylinder (r=rim_radius,h=rim_thickness+2);
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//if the rim is thicker than the gear, carve out the gear body
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else if (rim_thickness>gear_thickness)
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translate ([0,0,gear_thickness])
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//if the rim is thicker than the gear, carve out gear body
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else if (rim_thickness>gear_thickness){
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//if not centered, carve out only the top
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if (centered_gear == false){
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translate ([0,0,gear_thickness])
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cylinder (r=rim_radius,h=rim_thickness);
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}
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else
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//carve out half from top and half from bottom
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union ()
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{
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translate ([0,0,(gear_thickness + rim_thickness)/2])
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cylinder (r=rim_radius,h=rim_thickness+1);
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translate ([0,0,-1 -(gear_thickness + rim_thickness)/2])
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cylinder (r=rim_radius,h=rim_thickness+1);
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}
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}
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}
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//extend the gear body if gear_thickness > rim_thickness unless spoked,
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if (spokes==0 && gear_thickness > rim_thickness)
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if (gear_thickness > rim_thickness)
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{
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linear_extrude_flat_option(flat=flat, height=gear_thickness)
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if (centered_gear == false)
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{
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linear_extrude_flat_option(flat=flat, height=gear_thickness)
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circle (r=rim_radius);
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}
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else
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{
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translate ([0,0,-(gear_thickness - rim_thickness)/2])
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linear_extrude_flat_option(flat=flat, height=gear_thickness)
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circle (r=rim_radius);
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}
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//if rim is thicker than body, body protrudes into rim
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circle (r=rim_radius);
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}
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//add the hub
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translate ([0,0,hub_base])
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linear_extrude_flat_option(flat=flat, height=hub_thickness)
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circle (r=hub_diameter/2);
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//add in spokes
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if (spokes>0)
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{
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for(i=[0:spokes-1])
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translate([0,0,rim_thickness/2])
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rotate([90,0,i*360/spokes])
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@ -437,9 +464,10 @@ module gear (
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}
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if (spoke_square==false){
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resize([spoke_width,spoke_thickness,spoke_length])
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cylinder(h=1,d=1);
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}
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cylinder(h=10,d=10);
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}
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}
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}
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}
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//remove the center bore
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@ -622,7 +650,13 @@ module test_gears()
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{
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gear (number_of_teeth=17,
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circular_pitch=500*pi/180,
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circles=8);
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spokes=6,
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spoke_thickness=4,
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gear_thickness=0,
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rim_thickness=5,
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hub_thickness=5,
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hub_diameter=10,
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circles=0);
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rotate ([0,0,360*4/17])
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translate ([39.088888,0,0])
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@ -657,8 +691,12 @@ module test_gears()
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{
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gear (number_of_teeth=27,
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circular_pitch=500*pi/180,
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//circles=5,
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circles=6,
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circle_diameter=12,
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spokes=6,
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gear_thickness=2,
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hub_thickness=10,
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centered_gear=true,
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spoke_thickness=3,
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hub_diameter=2*8.88888889);
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@ -674,6 +712,7 @@ module test_gears()
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number_of_teeth=14,
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circular_pitch=200*pi/180,
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pressure_angle=5,
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twist=30,
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clearance = 0.2,
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gear_thickness = 10,
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rim_thickness = 10,
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@ -682,17 +721,18 @@ module test_gears()
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circles=0);
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translate ([13.8888888,0,1])
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gear (
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number_of_teeth=11,
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number_of_teeth=10,
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circular_pitch=200*pi/180,
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pressure_angle=5,
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clearance = 0.2,
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gear_thickness = 10,
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rim_thickness = 10,
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rim_thickness = 8,
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twist=-30*8/10,
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rim_width = 15,
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hub_thickness = 20,
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//hub_diameter=2*7.222222,
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hub_diameter=8,
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bore_diameter=5,
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hub_thickness = 10,
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centered_hub=true,
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hub_diameter=7,
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bore_diameter=4,
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circles=0);
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}
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}
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@ -738,7 +778,7 @@ module test_double_helix_gear (
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pressure_angle=30;
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gear (number_of_teeth=teeth,
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circular_pitch=700,
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circular_pitch=700*pi/180,
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pressure_angle=pressure_angle,
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clearance = 0.2,
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gear_thickness = height/2*0.5,
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@ -751,7 +791,7 @@ module test_double_helix_gear (
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twist=twist/teeth);
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mirror([0,0,1])
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gear (number_of_teeth=teeth,
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circular_pitch=700,
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circular_pitch=700*pi/180,
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pressure_angle=pressure_angle,
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clearance = 0.2,
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gear_thickness = height/2,
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@ -776,7 +816,7 @@ module test_backlash ()
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rotate ([0,0,-360/teeth/4])
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gear (
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number_of_teeth = teeth,
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circular_pitch=700,
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circular_pitch=700*pi/180,
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gear_thickness = 12,
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rim_thickness = 15,
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rim_width = 5,
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@ -789,7 +829,7 @@ module test_backlash ()
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rotate ([0,0,360/teeth/4])
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gear (
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number_of_teeth = teeth,
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circular_pitch=700,
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circular_pitch=700*pi/180,
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gear_thickness = 12,
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rim_thickness = 15,
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rim_width = 5,
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@ -800,7 +840,7 @@ module test_backlash ()
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circles=8);
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}
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color([0,0,128,0.5])
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color([0,0,1,0.5])
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translate([0,0,-5])
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cylinder ($fn=20,r=backlash / 4,h=25);
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}
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