X-Git-Url: https://git.hcoop.net/clinton/prusa3.git/blobdiff_plain/ceb92c1e36a62d84dcf6b50e0f8526f55be02676..a4895940e5bf2f2de8dbcd4ee30e6018681698d8:/box_frame/x-end.scad diff --git a/box_frame/x-end.scad b/box_frame/x-end.scad dissimilarity index 97% index 62d915a..3ad0cf1 100644 --- a/box_frame/x-end.scad +++ b/box_frame/x-end.scad @@ -1,138 +1,135 @@ -// PRUSA iteration3 -// X ends -// GNU GPL v3 -// Josef Průša -// Václav 'ax' Hůla -// http://www.reprap.org/wiki/Prusa_Mendel -// http://github.com/prusajr/PrusaMendel - -include -use -use -use - -//height and width of the x blocks depend on x smooth rod radius -x_box_height = 52 + 2 * bushing_xy[0]; -x_box_width = (bushing_xy[0] <= 4) ? 17.5 : bushing_xy[0] * 2 + 9.5; -echo(x_box_width); -bearing_height = max ((bushing_z[2] > 30 ? x_box_height : (2 * bushing_z[2] + 8)), x_box_height); - -module x_end_motor(){ - - mirror([0, 1, 0]) { - - x_end_base([3, 3, min((bushing_xy[0] - 3) * 2, 3), 2], len=42, offset=-5, thru=false); - - - translate([0, -z_delta - 2, 0]) difference(){ - union(){ - intersection() { - translate([-15, -34, 30]) cube([20, 60, x_box_height], center = true); - union() { - translate([-14, -16 + z_delta / 2, 24]) cube_fillet([17.5, 10.5 + z_delta, 55], center = true, vertical=[0, 0, 3, 3], top=[0, 3, 6, 3], $fn=16); - //lower arm holding outer stepper screw - translate([-10.25, -34, 9]) intersection(){ - translate([0, 0, -5]) cube_fillet([10, 37, 28], center = true, vertical=[0, 0, 0, 0], top=[0, 3, 5, 3]); - translate([-10/2, 10, -26]) rotate([45, 0, 0]) cube_fillet([10, 60, 60], radius=2); - } - } - } - translate([-16, -32, 30.25]) rotate([90, 0, 0]) rotate([0, 90, 0]) nema17(places=[1, 0, 1, 1], h=11); - } - - // motor screw holes - translate([21-5, -21-11, 30.25]){ - // belt hole - translate([-30, 11, -0.25]) cube_fillet([11, 36, 22], vertical=0, top=[0, 1, 0, 1], bottom=[0, 1, 0, 1], center = true, $fn=4); - //motor mounting holes - translate([-29.5, 0, 0]) rotate([0, 0, 0]) rotate([0, 90, 0]) nema17(places=[1, 1, 0, 1], holes=true, shadow=5.5, $fn=small_hole_segments, h=8); - } - } - //smooth rod caps - //translate([-22, -10, 0]) cube([17, 2, 15]); - //translate([-22, -10, 45]) cube([17, 2, 10]); - } -} - -module x_end_base(vfillet=[3, 3, 3, 3], thru=true, len=40, offset=0){ - - difference(){ - union(){ - translate([-10 - bushing_xy[0], -10 + len / 2 + offset, 30]) cube_fillet([x_box_width, len, x_box_height], center=true, vertical=vfillet, top=[5, 3, 5, 3]); - - translate([0, 0, 4 - bushing_xy[0]]) { - //rotate([0, 0, 0]) translate([0, -9.5, 0]) - translate([z_delta, 0, 0]) render(convexity = 5) linear(bushing_z, bearing_height); - // Nut trap - translate([-2, 18, 5]) cube_fillet([20, 14, 10], center = true, vertical=[8, 0, 0, 5]); - //} - } - } - // here are bushings/bearings - translate([z_delta, 0, 4 - bushing_xy[0]]) linear_negative(bushing_z, bearing_height); - - // belt hole - translate([-5.5 - 10 + 1.5, 22 - 9 + offset, 30]) cube_fillet([max(idler_width + 2, 11), 55, 27], center = true, vertical=0, top=[0, 1, 0, 1], bottom=[0, 1, 0, 1], $fn=4); - - //smooth rods - translate([-10 - bushing_xy[0], offset, 0]) { - if(thru == true){ - translate([0, -11, 6]) rotate([-90, 0, 0]) pushfit_rod(bushing_xy[0] * 2 + 0.2, 50); - translate([0, -11, xaxis_rod_distance+6]) rotate([-90, 0, 0]) pushfit_rod(bushing_xy[0] * 2 + 0.2, 50); - } else { - translate([0, -7, 6]) rotate([-90, 0, 0]) pushfit_rod(bushing_xy[0] * 2 + 0.2, 50); - translate([0, -7, xaxis_rod_distance+6]) rotate([-90, 0, 0]) pushfit_rod(bushing_xy[0] * 2 + 0.2, 50); - } - } - translate([0, 0, 5 - bushing_xy[0]]) { // m5 nut insert - translate([0, 17, 0]) rotate([0, 0, 10]){ - //rod - translate([0, 0, -1]) cylinder(h=(4.1 / 2 + 5), r=3, $fn=32); - //nut - translate([0, 0, 9]) cylinder(r=4.6, h=14.1, center = true, $fn=6); - - } - } - } - //threaded rod - translate([0, 17, 0]) %cylinder(h = 70, r=2.5+0.2); -} - -module x_end_idler(){ - difference() { - x_end_base(len=48 + z_delta / 3, offset=-10 - z_delta / 3); - // idler hole - translate([-20, -15 - z_delta / 2, 30]) { - rotate([0, 90, 0]) cylinder(r=m4_diameter / 2, h=33, center=true, $fn=small_hole_segments); - translate([15 - 2 * single_wall_width, 0, 0]) rotate([90, 0, 90]) cylinder(r=m4_nut_diameter_horizontal / 2, h=3, $fn=6); - - } - translate([-6 - x_box_width, 11, 29.5 - (max(idler_bearing[0], 16) / 2)]) cube([x_box_width + 1, 11, 1.5 + max(idler_bearing[0], 16)]); - } - %translate([-14, -9, 30.5 - (max(idler_bearing[0], 16) / 2)]) x_tensioner(); -} - -module x_tensioner(len=62, idler_height=max(idler_bearing[0], 16)) { - idlermount(len=len, rod=m4_diameter / 2, idler_height=idler_height, narrow_len=46, narrow_width=idler_width + 2 - single_wall_width); -} - - -translate([-40, 0, 4 - bushing_xy[0]]) x_tensioner(); -translate([0, -80, 0]) mirror([1, 0, 0]) x_end_idler(thru=true); -translate([-50, 0, 0]) mirror([1, 0, 0]) translate([-50, 0, 0]) - x_end_motor(); - -module pushfit_rod(diameter, length){ - cylinder(h = length, r=diameter/2, $fn=30); - translate([0, -diameter/4, length/2]) cube_fillet([diameter, diameter/2, length], vertical = [0, 0, 1, 1], center = true, $fn=4); - - translate([0, -diameter/2-1.2, length/2]) cube([diameter - 1, 1, length], center = true); -} - -if (idler_bearing[3] == 1) { - translate([-33, -33 - idler_bearing[0] / 2, 0]) { - render() bearing_guide_inner(); - translate([0, -(idler_bearing[0]+10), 0]) - render()bearing_guide_outer(); - } -} +// PRUSA iteration3 +// X end prototype +// GNU GPL v3 +// Josef Průša and contributors +// http://www.reprap.org/wiki/Prusa_Mendel +// http://prusamendel.org + +// Also includes code from Wilson and Wilson2, (c) Marty Rice +// https://github.com/mjrice/wilson + +// todo: make x-end height global and make anything relying implicitly +// on the height of the x-end use that for positioning. + +// bearing height, strain relief (&& maybe make dependent upon the bearing diameter) + +// major issues with rev 3 + +// - motor side screw hole conflicts with switch / other rear mount is +// inaccessible without removing the leadscrew from the nut + +// - New idler anti-pitching ribs are too big (new idler I wasn't +// using is larger so the existing ones worked fine for that one...) +// NOTE: new idler is meant for integrated toothed idler... + +use +include + +pushfit_d = bushing_xy[0] * 2 + 0.25; //smooth_rod_d + 0.25; +rod_distance = 50; +x_box_height = 5 + rod_distance + bushing_xy[0] * 2 + 0.25; +hex_nut_r = 4.75; +thinwall = 3; + +module vertical_bushing_base(bushing){ + bushing_size = bushing[1]*2 + 2 * thinwall; + translate(v=[-2-bushing_size/4,0,x_box_height/2]) cube(size = [4+bushing_size/2,bushing_size,x_box_height], center = true); + cylinder(h = x_box_height, r=bushing_size/2, $fn = 90); +} + +module vertical_bushing_holes(bushing){ + bushing_cut_extra = 0.2; // padding so it's not too tight + translate(v=[0,0,-4]) cylinder(h = x_box_height + 3, r=bushing[1] + bushing_cut_extra, $fn = 60); + translate(v=[0,0,x_box_height-4]) cylinder(h=x_box_height,r=bushing[1]-1,$fn=60); + // TODO: make translate(z) use x_box_height to correctly position slit + #rotate(a=[0,0,-50]) translate(v=[8,0,24/*was 31.5 mjr*/]) cube(size = [10,2 /*was 1 mjr*/ ,x_box_height+13], center = true); + translate([0,0,-1]) cylinder(h=9,r1=bushing[1]+thinwall/2+1,r2=4,$fn=60); + //#translate([0,0,49]) cylinder(h=9,r2=bushing[1]+thinwall/2,r1=4,$fn=60); +} + + +module nut_trap_base () { + cube(size=[16,21,8],center=true); + translate ([2,0,0]) cylinder(h=8,r=12.5,$fn=50,center=true); +} + +module nut_trap () { + union() { + // center post of brass nut + cylinder(h=12,r=5.45,$fn=50,center=true); + // holes for m3 screws in brass nut + translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true); + #rotate([0,0,90]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true); + rotate([0,0,180]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true); + #rotate([0,0,270]) translate(v=[8,0,0]) cylinder(h=12,r=1.8,$fn=20,center=true); + } +} + +module x_end_base(){ +// Main block +height = x_box_height; +// TODO: calculate correct translate(y) + cube(y) using size of bearing +translate(v=[-15,-10,height/2]) cube(size = [17,45,height], center = true); +// Bearing holder + vertical_bushing_base(bushing_z); +//Nut trap + translate(v=[-4+zmotor_delta_x,-17-zmotor_delta_y,4]) nut_trap_base (); + // Cube +// #translate(v=[-2-2,-17,4]) cube(size = [8,16,8], center = true); + // Hexagon +// #translate(v=[0,-17,0]) rotate([0,0,30]) cylinder(h = 8, r=8, $fn = 6); +} + +module x_end_holes(){ + vertical_bushing_holes(bushing_z); + // Belt hole + translate(v=[-1,0,0]){ + // Stress relief + translate(v=[-5.5-10+1.5,-bushing_z[1]-4,30]) cube(size = [20,1,28], center = true); + // Cut out for belt (this is NOT centered because the motor isn't centered) + difference(){ + translate(v=[-5.5-10+1.5,-10,30]) cube(size = [10,46,28], center = true); + + // Nice edges + translate(v=[-5.5-10+1.5,-10,30+23]) rotate([0,45,0]) cube(size = [10,46,28], center = true); + translate(v=[-5.5-10+1.5,-10,30+23]) rotate([0,-45,0]) cube(size = [10,46,28], center = true); + translate(v=[-5.5-10+1.5,-10,30-23]) rotate([0,45,0]) cube(size = [10,46,28], center = true); + translate(v=[-5.5-10+1.5,-10,30-23]) rotate([0,-45,0]) cube(size = [10,46,28], center = true); + +} +} + + + pushrod_extra_z = 2.5; +// Bottom pushfit rod +#translate(v=[-15,-41.5,bushing_xy[0]+pushrod_extra_z]) rotate(a=[-90,0,0]) pushfit_rod(pushfit_d,50); +// Top pushfit rod +translate(v=[-15,-41.5,rod_distance+bushing_xy[0]+pushrod_extra_z]) rotate(a=[-90,0,0]) pushfit_rod(pushfit_d,50); +// Nut trap +translate(v=[zmotor_delta_x,-17-zmotor_delta_y,3]) rotate ([0, 0, 45]) nut_trap (); +// #translate(v=[0,-17,-0.5]) cylinder(h = 4, r1=3.4, r2=2.9, $fn=25); +// translate(v=[0,-17,3]) rotate([0,0,30]) cylinder(h = 10, r=hex_nut_r, $fn = 6); +} + + +// Final prototype +module x_end_plain(){ + difference(){ + x_end_base(); + x_end_holes(); + } +} + +x_end_plain(); + + +module pushfit_rod(diameter,length){ + translate([0,-0.3,0]) cylinder(h = length, r=diameter/2, $fn=30); + translate([0,0.3,0]) cylinder(h = length, r=diameter/2, $fn=30); +// difference(){ +// translate(v=[0,-diameter/2.85,length/2]) rotate([0,0,45]) cube(size = [diameter/2,diameter/2,length], center = true); +// translate(v=[0,-diameter/4-diameter/2-0.4,length/2]) rotate([0,0,0]) cube(size = [diameter,diameter/2,length], center = true); +// } + +} +