mirror of
https://github.com/nophead/Mendel90.git
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356 lines
10 KiB
OpenSCAD
356 lines
10 KiB
OpenSCAD
//
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// Mendel90
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//
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// Originally based on Josef Prusa's version but much hacked
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//
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// GNU GPL v2
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// nop.head@gmail.com
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// hydraraptor.blogspot.com
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//
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include <conf/config.scad>
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use <d-motor_bracket.scad>
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Stoffle15_10mm = [10, 13, 5, false];
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Stoffle15_16mm = [16.5, 10, 6, false];
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Mendel90_12mm = [12, 10, 6 + 3/2 - 1, false];
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function insulator_diameter(type) = type[0];
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function insulator_depth(type) = type[1];
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function insulator_screw_pitch(type) = type[2];
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function insulator_clamped(type) = type[3];
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hot_end = Mendel90_12mm;
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clamp_width = 2 * (insulator_screw_pitch(hot_end) + screw_clearance_radius(M3_cap_screw) + min_wall);
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module b608(h=7){
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difference(){
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union(){
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translate([0,0,3.5])
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cylinder(r=11.01,h=h,center=true);
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*translate([0,0,3.5])
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cylinder(r=6,h=7,center=true);
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}
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//translate([0,0,3.5]) cylinder(r=4,h=8,center=true);
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}
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}
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screw_depth = 5;
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motor_y = 31.5;
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motor_min = 26 + 5;
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motor_max = 36;
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motor_x = (motor_min + motor_max) / 2;
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motor_leeway = motor_max - motor_min;
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thickness = 5;
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base_thickness = 6;
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filament_x = 75;
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filament_z = 15;
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width = 28;
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mount_pitch = 25;
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pscrew_x = 60;
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pscrew_y = [17.5, 45.5];
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pscrew_z = [8.5, 21.5];
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driven_x = 70;
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driven_y = 31.5;
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function extruder_connector_offset() = [-filament_x + motor_x, filament_z - thickness, motor_y] + d_motor_connector_offset(NEMA17);
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module wades_block_stl() {
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stl("wades_block");
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insulator = insulator_diameter(hot_end);
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screw_pitch = insulator_screw_pitch(hot_end);
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insulator_depth = insulator_depth(hot_end);
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difference(){
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union(){
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cube([81, 52, thickness]); // motor plate
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cube([filament_x + 25 - 3.5, base_thickness, 28]); // base
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translate([filament_x + 25 - 3.5, base_thickness / 2, filament_z])
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for(a = [-90, 90])
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rotate([a, 0, 0])
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teardrop(r = 10.6, h = base_thickness, truncate = false, center = true);
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translate([57, 0, 0])
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cube([26, 52, width]); // bearing housing
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translate([80,1,0]) // fillet
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cube([11,11, width]);
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}
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translate([91,base_thickness,-1])
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rotate([0,0,45])
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cube([9,9,30]); // chamfer on fillet
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translate([-11,-1,30]) rotate([0,60,0]) cube([30, base_thickness + 2, 60]); // base chamfers
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translate([80, -1, width + eta]) cube([40, base_thickness + 2, 10]);
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translate([filament_x, 20, filament_z])
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rotate([90,0,0])
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teardrop(h = 70, r=4/2, center=true); // filament
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// mounting holes
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for(side = [-1, 1])
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translate([filament_x + mount_pitch * side, base_thickness, filament_z])
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rotate([90,0,0])
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nut_trap(M4_clearance_radius, M4_nut_radius, 3, true);
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for(y = pscrew_y)
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for(z = pscrew_z) {
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translate([70, y, z]) rotate([90,0,90])teardrop(h=40,r=4.5/2, center=true); // pressure screws
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translate([pscrew_x - 5, y, z]) rotate([90,0,90])cylinder(h=10,r=M4_nut_radius, $fn=6, center=true); // nut traps
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}
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//
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// holes for motor
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//
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translate([motor_x, motor_y, -1]) {
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slot(r = NEMA_big_hole(NEMA17), l = motor_leeway, h = 10, center = false); // motor hub slot
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for(x = NEMA_holes(NEMA17)) // motor screw slots
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for(y = NEMA_holes(NEMA17))
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translate([x,y,0])
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slot(r = M3_clearance_radius, l = motor_leeway, h = 10, center = false);
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}
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//
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// remove fourth motor slot
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//
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translate([motor_x - 40 + motor_leeway / 2, motor_y - NEMA_big_hole(NEMA17), -1])
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cube([40,32,7]);
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translate([motor_x - 40 + motor_leeway / 2 + 6, motor_y, -1])
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cube([40,32,7]);
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translate([-5,-1,-1]) cube([16,60,30]); // truncates tail
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translate([driven_x, driven_y, 7.5]) poly_cylinder(r = M8_clearance_radius + 0.25,h=30); // hole for hobbed bolt
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translate([driven_x, driven_y, 21.01]) b608(); // top bearing socket
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translate([83, driven_y, 11.5]) b608(8); // clearance for idler
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translate([driven_x, driven_y, -0.01]) b608(); // bottom bearing socket
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//
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// Hole for hot end
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//
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translate([filament_x, -15 + insulator_depth, filament_z])
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rotate([90,0,0]) {
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teardrop(h = 30, r = insulator / 2, center=true); // insulator
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translate([0,0, -14.5])
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teardrop(h = 1 , r = insulator / 2 + 1, center=true); // relief to avoid radius so end is flat
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}
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if(insulator_clamped(hot_end))
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translate([filament_x - clamp_width / 2, -eta, filament_z])
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cube([clamp_width, insulator_depth, 100]);
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for(side = [-1, 1])
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translate([filament_x + screw_pitch * side, screw_depth, -1])
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cylinder(h = 30, r = (3.3 / 2), $fn = 9); // retaining screws
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}
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}
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module wades_gear_spacer_stl() {
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stl("wades_gear_spacer");
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washer = M8_washer;
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h = 5 * washer_thickness(washer);
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difference() {
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cylinder(r = washer_diameter(washer) / 2, h = h, center = false);
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translate([0,0, -0.5])
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poly_cylinder(r = M8_clearance_radius, h = h + 1, center = false);
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}
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}
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bfbext=false;
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*difference() {
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wadeblock(bfbext);
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*translate([-1,-1, filament_z])
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cube([200,100,100]);
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}
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function extruder_connector_height() = motor_y - d_motor_bracket_offset(NEMA17);
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module wades_big_gear_stl() {
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stl("wades_big_gear");
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color(wades_big_gear_color) import("../imported_stls/39t17p.stl");
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}
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module wades_small_gear_stl() {
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stl("wades_small_gear");
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color(wades_small_gear_color)
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translate([-10, -10, 0])
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import("../imported_stls/wades_gear.stl");
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}
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module small_gear_assembly() {
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wades_small_gear_stl();
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rotate([90, 0, -24]) {
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translate([0, 4, -5/2 - 6])
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screw(M3_grub_screw, 6);
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translate([0, 4, -6])
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rotate([0,0,30])
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nut(M3_nut);
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}
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}
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idler_height = 12;
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module wades_idler_block_stl() {
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stl("wades_idler_block");
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long_side = 37;
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short_side = 25;
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corners_diameter = 3;
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608_dia = 12;
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608_height = 9;
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mounting_dia = 4.5;
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difference(){
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// Main block
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rounded_rectangle([long_side, short_side, idler_height], corners_diameter, center = false);
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// bearing cutout
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translate([0, 0, idler_height - 2]){
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rotate([90,0,0])
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cylinder(h = 608_height, r=608_dia, center=true);
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rotate(a=[90,0,0])
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cylinder(h = short_side-2, r=8.6/2, center=true);
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}
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//mounting holes
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for(x = pscrew_y)
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for(y = pscrew_z)
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translate([x - motor_y, y - filament_z, 0])
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poly_cylinder(h = idler_height * 2.1, r = mounting_dia / 2, center=true);
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}
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}
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module wade_idler_assembly() {
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color(wades_idler_block_color) render() wades_idler_block_stl();
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translate([0, 0, idler_height - 2])
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rotate([90, 0, 0]) {
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rod(d = 8, l = 22);
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ball_bearing(BB608);
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}
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}
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module wades_assembly() {
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assembly("wades_assembly");
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render() wades_block_stl();
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// idler screws, washers and springs
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for(i = [0,1])
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translate([pscrew_x, pscrew_y[i], pscrew_z[i]])
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rotate([-90,0,90]) {
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screw(M4_hex_screw, 50);
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translate([0,0, -38]) {
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translate([0,0, -6]) {
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comp_spring(extruder_spring, 6);
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translate([0,0, -washer_thickness(M4_washer)]) {
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washer(M4_washer);
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translate([0,0, -nut_thickness(M4_nut)])
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nut(M4_nut);
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}
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}
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}
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}
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// mounting screws
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for(side = [-1, 1])
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translate([filament_x + mount_pitch * side, base_thickness - 3, filament_z])
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rotate([-90,0,0])
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screw(M4_hex_screw, 20);
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//idler
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translate([98, motor_y, filament_z])
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rotate([90, 0, -90])
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wade_idler_assembly();
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// motor and gear
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translate([motor_x, motor_y, thickness + eta])
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rotate([0,180,0]) {
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NEMA(NEMA17);
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translate([0,0, 3.5])
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small_gear_assembly();
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translate([0, 0, thickness])
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rotate([0, 0, 90])
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NEMA_screws(NEMA17, 3);
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assembly("D_connector_assembly");
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d_motor_bracket_assembly(NEMA17);
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d_shell_assembly(NEMA17);
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end("D_connector_assembly");
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}
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// hobbed bolt and gear
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translate([driven_x, motor_y, 0]) {
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translate([0, 0, width - BB608[2] / 2])
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ball_bearing(BB608);
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translate([0, 0, BB608[2] / 2])
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ball_bearing(BB608);
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rotate([180, 0, 0])
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color(wades_gear_spacer_color) render() wades_gear_spacer_stl();
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translate([0, 0, -7.5])
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rotate([180, 0, 0])
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wades_big_gear_stl();
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translate([0,0, -14])
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rotate([180, 0, 0])
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screw(M8_hex_screw, 60);
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translate([0,0, width])
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washer(M8_washer);
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translate([0,0, width + washer_thickness(M8_washer)]) {
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comp_spring(hob_spring, 8);
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translate([0, 0, 8])
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nut(M8_nut);
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}
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}
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translate([75, 5 - nozzle_length / 4, 15])
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rotate([-90, 0, 0]) {
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color(filament_viz_color) cylinder(h = nozzle_length / 2 + 10, r = insulator_diameter(hot_end) / 2, center = true);
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translate([0, 0, -nozzle_length /2 - 5])
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color(extruder_nozzle_color) cylinder(h = nozzle_length / 2, r = 3, center = true);
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}
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for(side = [-1, 1])
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translate([filament_x + insulator_screw_pitch(hot_end) * side, screw_depth, width])
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screw(M3_cap_screw, 30);
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end("wades_assembly");
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}
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if(1)
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rotate([90, 0, 0])
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wades_assembly();
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else {
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wades_block_stl();
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*wades_idler_block_stl();
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*wades_gear_spacer_stl();
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}
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