X-Git-Url: http://git.hcoop.net/clinton/prusa3.git/blobdiff_plain/10b5774ad0b62c31eb84dc30d30950c18bab4ba4..3dded18514e687345d3d2001ccc5fe2887e8bd79:/box_frame/x-end.scad diff --git a/box_frame/x-end.scad b/box_frame/x-end.scad dissimilarity index 95% index dc24282..3cf1e9d 100644 --- a/box_frame/x-end.scad +++ b/box_frame/x-end.scad @@ -1,120 +1,138 @@ -// 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 - - -module x_end_motor(){ - mirror([0,1,0]) { - - x_end_base([3,3,0,0], thru=false); - /// motor dummy - //%translate([21-5,-21-11,25]) cube([42,42,42], center = true); - - - difference(){ - union(){ - translate([-13.75,-15,26]) cube_fillet([17.5,12,52], center = true, vertical=[0,0,3,1.5], top=[0,3,6,3]); - translate([-10,-34,9]) intersection(){ - cube_fillet([10,37,18], 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([-15, -32, 30.25]) rotate([90, 0, 0]) rotate([0, 90, 0]) nema17(places=[1,0,1,1], h=10); - } - - // motor screw holes - translate([21-5,-21-11,30.25]){ - // belt hole - translate([-30,11,0]) cube([10,26,20], center = true); - //motor mounting holes - translate([-29, 0, 0]) rotate([0, 0, 0]) rotate([0, 90, 0]) nema17(places=[1,1,0,1], holes=true, shadow=5, $fn=7, 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){ - difference(){ - union(){ - difference(){ - translate([-13.75-0.5,-10+len/2,30]) cube_fillet([18.5,len,60], center = true, vertical=vfillet, top=[5,3,5,3]); - bushing_negative(60); - } - //rotate([0,0,0]) translate([0,-9.5,0]) - if (bearing_choice == 1) { - linear_bushing(60); - } else { - linear_bearing(60); - } - // Nut trap - difference(){ - if ((bearing_choice != 1) || (bushing_type == 2)) { - translate([-2,17.5,4]) cube_fillet([16,18,8], center = true, vertical=[3,0,0,0]); - } else { - translate([-2,17.5,4]) cube_fillet([16,18,8], center = true, vertical=[3,0,0,3]); - } - - //bottom hole - - translate([0,17,-1]) cylinder(h = 4, r=2.75); - //nut slid in - #translate([3,17,4]) cube([9.2*2,9.2*sqrt(3/4)+0.4,4.1], center = true); - - translate([0,17,6.5]) cylinder(h = 4, r=2.75); - } - } - - // belt hole - translate([-5.5-10+1.5,22-9,30]) cube([10,55,32], center = true); - - // change rod diameter to 8.4 if printing with ABS - if(thru == true){ - translate([-14,-11,6]) rotate([-90,0,0]) pushfit_rod(8.1,50); - translate([-14,-11,xaxis_rod_distance+6]) rotate([-90,0,0]) pushfit_rod(8.1,50); - } else { - translate([-14,-7,6]) rotate([-90,0,0]) pushfit_rod(8.1,50); - translate([-14,-7,xaxis_rod_distance+6]) rotate([-90,0,0]) pushfit_rod(8.1,50); - } - - - } - - //threaded rod - #translate([0,17,0]) %cylinder(h = 70, r=2.5+0.2); - -} - - -module x_end_idler(){ - difference() { - x_end_base(len=42+idler_size_inner_r); - // idler hole - translate([0,17+6+idler_size_inner_r,30.25-((bearing_type==0)? 3 : 0)]) rotate([0,-90,0]) cylinder(h = 80, r=idler_size_inner_r-0.2, $fn=30); - if (bearing_type == 0) - translate([-9,17+6+idler_size_inner_r,30.25-3]) { - rotate([0,-90,0]) cylinder(h = 10, r=idler_size/2+4, $fn=30); - translate([-5,10,0]) cube([10,20,idler_size+8], center=true); - } - } -} - -mirror([0,0,0]) x_end_idler(thru=true); -// translate([40,40,0]) x_end_idler(thru=false); -translate([40,0,0]) x_end_motor(); - -module pushfit_rod(diameter,length){ - cylinder(h = length, r=diameter/2, $fn=30); - translate([0,-diameter/4,length/2]) cube([diameter,diameter/2,length], center = true); - - translate([0,-diameter/2-1.2,length/2]) cube([diameter,1,length], center = true); -} +// 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 + +// major issues with rev 3 + +// - motor side screw hole conflicts with switch / other rear mount is +// inaccessible without removing the leadscrew from the nut + +use +include + +pushfit_d = bushing_xy[0] * 2 + 0.2; +thinwall = single_wall_width * 6; // 3 perimeters +vertical_bushing_base_size = bushing_z[1]*2 + 2 * thinwall; + +x_box_length = 45; // TODO: auto-adjust based on bearing size? + +// todo: add ghost bearing model to make it easier to spot check if +// everything is aligned +module vertical_bushing_base(){ + translate(v=[-2-vertical_bushing_base_size/4,0,x_box_height/2]) cube(size = [4+vertical_bushing_base_size/2,vertical_bushing_base_size,x_box_height], center = true); + cylinder(h = x_box_height, r=vertical_bushing_base_size/2, $fn = 90); +} + +module vertical_bushing_holes(){ + // FIXME: is extra cut necessary? check conf_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_z[1] + bushing_cut_extra, $fn = 60); + translate(v=[0,0,x_box_height-4]) cylinder(h=x_box_height,r=bushing_z[1]-1,$fn=60); + // TODO: is slit too wide or too low? Wilson increased width from 1 + // -> 2 mm, slit also might need to end 1-2mm before the base + #rotate(a=[0,0,-50]) translate(v=[thinwall*2 + 1,0,x_box_height/2 - 2]) cube(size = [bushing_z[2]/2, 2 ,x_box_height], center = true); + translate([0,0,-1]) cylinder(h=9,r1=bushing_z[1]+thinwall/2+1,r2=4,$fn=60); +} + +module nut_trap_base () { + // TODO: cube doesn't line up with edge of base, cylinder is slightly asymmetrical + // adapt newer nut trap from prusa i3 mk3 instead of wilson2 + cube(size=[16,21,8],center=true); + translate ([2,0,0]) cylinder(h=8,r=12.5,$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); + } +} + +// x position of edge of main block (facing frame), for attaching objects to it +function x_base_back() = -10 - bushing_xy[0] - x_box_width/2; +// y position of edge of main block facing away from x-axis +function x_base_outside() = vertical_bushing_base_size/2; +// y position of edge of main block facing toward the x-axis +function x_base_inside() = -x_box_length/2 - vertical_bushing_base_size/2; + +module x_end_base(){ +// Main block +translate(v=[-10 - bushing_xy[0], -x_box_length/2 + vertical_bushing_base_size/2,x_box_height/2]) cube(size = [x_box_width,x_box_length,x_box_height], center = true); +// Bearing holder + vertical_bushing_base(); +//Nut trap + translate(v=[-4+zmotor_delta_x,-17-zmotor_delta_y,4]) nut_trap_base (); +} + +// TODO: x translation of belt and smooth rods needs to adapt to +// x_end_width and motor/idler pulley position. + +module x_end_holes(){ + vertical_bushing_holes(); + // 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) + x_box_offset = -x_box_length/2 + vertical_bushing_base_size/2; + difference(){ + translate(v=[-5.5-10+1.5, x_box_offset ,30]) cube(size = [10, x_box_length + 1,28], center = true); + + // Nice edges + translate(v=[-5.5-10+1.5,x_box_offset,30+23]) rotate([0,45,0]) cube(size = [10,x_box_length + 1,28], center = true); + translate(v=[-5.5-10+1.5,x_box_offset,30+23]) rotate([0,-45,0]) cube(size = [10,x_box_length + 1,28], center = true); + translate(v=[-5.5-10+1.5,x_box_offset,30-23]) rotate([0,45,0]) cube(size = [10,x_box_length + 1,28], center = true); + translate(v=[-5.5-10+1.5,x_box_offset,30-23]) rotate([0,-45,0]) cube(size = [10,x_box_length + 1,28], center = true); + + } +} + + + // FIXME: confirm length of smooth rod doesn't change when x_box_length or bearing size changes + // should also make sure this is long enough if x-ends somehow end up larger than 50mm + // TODO: needs to shift top rod as diameter increases, wall is very + // thing for 10mm, and fails entirely for 12mm + translate([-10 - bushing_xy[0], 0, 0]) { + // Top pushfit rod + translate([0, -7, 6]) rotate([-90, 0, 0]) pushfit_rod(pushfit_d, 50); + // Bottom pushfit rod + translate([0, -7, xaxis_rod_distance+6]) rotate([-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 (); +} + + +// 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); + // TODO: reintroduce teardrop holes? +// 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); +// } + +}