4 // Josef Průša <josefprusa@me.com>
5 // Václav 'ax' Hůla <axtheb@gmail.com>
6 // http://www.reprap.org/wiki/Prusa_Mendel
7 // http://github.com/josefprusa/Prusa3
12 * @name Z Axis Motor Holder
18 * @name Z Axis Rod Holder
24 // - fix motor holder wall removal so it is sensible and actually
25 // removes the right thing
26 // - fix changing board_thickness, add way to specify # of bolts in
27 // side of frame (assume even spacing for now)
29 include <configuration.scad>
31 module zmotorholder(thickness=(frame_type == frame_single ? 38 : 23), bottom_thickness=5){
32 position_y = board_to_xz_distance + zaxis_delta_y + zmotor_delta_y;
33 position_x = board_to_xz_distance + zaxis_delta_x + zmotor_delta_x;
39 zrodholder(thickness=thickness, xlen=45 + zmotor_delta_x + zaxis_delta_x, ylen=48 + 5 + zmotor_delta_y + zaxis_delta_y, zdelta=((i_want_to_use_single_plate_dxf_and_make_my_z_weaker == 0) ? 0 : 5), bottom_x = 50 + zaxis_delta_x + zmotor_delta_x, bottom_y = 15 + zmotor_delta_y + zaxis_delta_y, am_top=0, bottom_thickness=bottom_thickness);
40 translate([position_x, position_y, 0]) {
41 nema17(places=[1, 1, 1, 1], h=bottom_thickness + layer_height, $fn=23, shadow=layer_height + 2);
44 // remove any interfering walls
45 translate([position_x, position_y, layer_height + 2 + 21 +3]) {
46 cube([43 + zmotor_delta_x + zaxis_delta_x,43,42], center = true);
49 // motor rotor clearance
50 translate([position_x, position_y, 0]) {
51 cylinder(r=11,h=20, center = true);
56 // FIXME: y = board_to_xz distance looks supicious --
57 // the smooth rod is offset by a fixed amount so why
58 // would the motor mount be moved in both directions
59 // instead of just away from the frame? X-axis does
60 // not use this to offset the leadscrew hole either.
61 translate([position_x, position_y, thickness]) {
62 mirror([0, 0, 1]) translate([0, 0, thickness-8])
63 #nema17(places=[1, 1, 1, 1], holes=true, h=bottom_thickness + 1, $fn=small_hole_segments);
64 //shadow=-6 + layer_height);
72 module zrodholder(thickness=(frame_type == frame_single ? 14 : 15), bottom_thickness=5, ylen=44, xlen=34, zdelta=0, bottom_y=14, bottom_x=14, am_top=1){
75 smooth_rod_insert_radius = bushing_z[0] + 5 * single_wall_width;
80 //piece along the flat side of a board
81 cube_fillet([bottom_x, ylen, bottom_thickness], vertical=[8, 3, 0, 0]);
82 if (frame_type == frame_alu) {
83 top_radius = am_top ? thickness : thickness / 3;
84 cube_fillet([5, ylen, thickness], vertical=[0, 0, 0, 0], top = [top_radius, 0, 0, 0]);
86 // FIXME: make rear/top bit optional, but don't remove entirely
87 // (printer seems to make less noise with the rear bit)
90 translate ([-board_thickness - 5, 0, 0])
91 cube_fillet([5, ylen, thickness], vertical=[0, 0, 0, 0], top = [top_radius, 0, 0, 0]);
92 translate ([-board_thickness, 5, 0])
93 cube ([board_thickness, ylen - 6, bottom_thickness/2]);
97 cube_fillet([5, ylen, thickness], vertical=[3, 3, 0, 0], top = [thickness / 1.7, 0, 0, 5]);
100 //hole for Z axis is thru this
101 cube_fillet([xlen + zaxis_delta_x, bottom_y, bottom_thickness], vertical=[3, 0, 0, 3]);
102 if (bottom_x < board_to_xz_distance - z_delta + zaxis_delta_x) {
103 translate([bottom_x, bottom_y, 0]) {
104 //large fillet that makes it stiffer by lot. Thanks to Marcus Wolschon
106 cube([holder_inner_r, holder_inner_r, bottom_thickness]);
107 translate([holder_inner_r, holder_inner_r, -0.5])
108 cylinder(r=holder_inner_r, h=bottom_thickness + 1);
112 if (frame_type != frame_alu) {
113 translate([5, 5, 0]) {
115 cube([holder_inner_r2, holder_inner_r2, thickness - 5.5]);
116 translate([holder_inner_r2, holder_inner_r2, -0.5])
117 cylinder(r=holder_inner_r2, h=thickness + 1, $fn=20);
121 // leadscrew bearing hole is cut from this
123 lead_bearing_y = board_to_xz_distance + zaxis_delta_y + zmotor_delta_y;
124 lead_bearing_x = board_to_xz_distance + zaxis_delta_x + zmotor_delta_x;
125 translate ([lead_bearing_x, lead_bearing_y, 0]) cylinder (d = bearing_608[0] + 1 + 2, h = bearing_608[2] + layer_height*4);
127 //piece along cut side of the board
128 if (frame_type == frame_box) {
129 translate([-board_thickness, 0, 0])
130 cube_fillet([board_thickness + board_to_xz_distance + bushing_z[0], 5, thickness], radius=2, top = [0, 0, 0, thickness], $fn=99);
131 } else if (frame_type == frame_alu) {
132 side_thickness = 5.0;// - zaxis_delta_y;
134 translate ([0, 0 /* zaxis_delta_y */, 0]) {
136 translate([-board_thickness, 0, 0]) {
137 cube_fillet([board_thickness, side_thickness, thickness], vertical = [0, 0, 0, 0], top = [0, 0, 0, 0]);
141 //cube_fillet([am_top ? board_to_xz_distance + zaxis_delta_x - smooth_rod_insert_radius : xlen + zaxis_delta_x , side_thickness, thickness], vertical = [2, 0, 0, 0], top = [0, 0, 0, thickness]);
142 cube_fillet([am_top ? board_to_xz_distance + zaxis_delta_x - smooth_rod_insert_radius : xlen , side_thickness, thickness / (am_top ? 1 : 1.5)], vertical = [2, 0, 0, 0], top = [0, 0, 0, thickness]);
144 // extra support for motor
146 translate ([0, ylen - side_thickness, 0]) cube_fillet([xlen/* board_to_xz_distance + zaxis_delta_x - smooth_rod_insert_radius */ , side_thickness, thickness/1.5], vertical = [2, 0, 0, 0], top = [0, 0, 0, thickness]);
150 // extra support along edge of smooth rod hole
151 radius_diff = smooth_rod_insert_radius - bushing_z[0];
153 translate([-board_thickness/3, -zaxis_delta_y/3, 0]) {
154 cube_fillet([board_thickness/3 + board_to_xz_distance + zaxis_delta_x - bushing_z[0] , -zaxis_delta_y/3 , thickness/2], vertical = [2, 0, 4, 0], top = [0, 0, 4, thickness/2]);
156 translate([board_to_xz_distance/2, -zaxis_delta_x + radius_diff/6, 0]) {
157 cube_fillet([board_to_xz_distance/2 + zaxis_delta_x + smooth_rod_insert_radius*0.75, radius_diff/3 , bottom_thickness*2], vertical = [2, 0, 4, bushing_z[0] * smooth_rod_insert_radius/bushing_z[0]], top = [0, 0, 2, thickness/4]);
161 translate([-board_thickness/2, 0, 0])
162 cube_fillet([board_thickness/2 + board_to_xz_distance + bushing_z[0], 5, thickness], radius=2, top = [0, 0, 0, thickness], $fn=99);
165 translate([board_to_xz_distance - z_delta + zaxis_delta_x, 9 + zaxis_delta_y, 0])
166 cylinder(h=bottom_thickness * (am_top ? 1.75 : 1.75), r=smooth_rod_insert_radius);
169 // === difference ===
172 #translate([board_to_xz_distance - z_delta + zaxis_delta_x, 9 + zaxis_delta_y, -1]) cylinder(h=am_top ? thickness+20 : bottom_thickness, r=bushing_z[0] + single_wall_width / 4);
173 //inside rouned corner
174 if (frame_type != frame_alu) {
175 translate([0, 5, -1]) cylinder(r=0.8, h=100, $fn=8);
180 lead_bearing_y = board_to_xz_distance + zaxis_delta_y + zmotor_delta_y;
181 lead_bearing_x = board_to_xz_distance + zaxis_delta_x + zmotor_delta_x;
182 translate ([lead_bearing_x, lead_bearing_y, 0]) {
185 translate ([0, 0, 1]) cylinder (d = 10.8, h = bearing_608[2]*2);
186 translate ([0, 0, -1]) cylinder (d = 23, h = bearing_608[2]+1);
188 translate ([0, 0, bearing_608[2]-layer_height*2]) cylinder (d = 23 - single_wall_width/2, h = layer_height);
194 if (frame_type == frame_single) {
195 //single plate has both screws on front
196 translate([16, 35, bottom_thickness + 4.5 + zdelta]) rotate([0, -90, 0]) {
199 translate([16, 15, bottom_thickness + 4.5 + zdelta]) rotate([0, -90, 0]) {
202 //motor mount has third screw
203 translate([16, 25, bottom_thickness + 4.5 + zdelta + 20]) rotate([0, -90, 0]) {
206 } else if (frame_type == frame_alu) {
207 // three screws on front
208 translate([18, ylen - board_thickness/2, bottom_thickness/2 + board_thickness/2 + zdelta]) rotate([0, -90, 0]) plate_screw();
209 translate([18, 5 + board_thickness/2, bottom_thickness/2 + board_thickness/2 + zdelta]) rotate([0, -90, 0]) plate_screw();
210 translate([18, 5 + board_thickness/2, thickness - board_thickness/2]) rotate([0, -90, 0])
213 // motor mount screw for opposite extrusion
214 translate([18, ylen - board_thickness/2, thickness - board_thickness/2]) rotate([0, -90, 0])
218 translate([-board_thickness-18, ylen - board_thickness/2, thickness - board_thickness/2]) rotate([0, 90, 0])
220 translate([-board_thickness-18, 5 + board_thickness/2, thickness - board_thickness/2]) rotate([0, 90, 0])
222 translate([-board_thickness-18, ylen - board_thickness/2, bottom_thickness/2 + board_thickness/2 + zdelta]) rotate([0, 90, 0]) plate_screw();
223 #translate([-board_thickness-18, 5 + board_thickness/2, bottom_thickness/2 + board_thickness/2 + zdelta]) rotate([0, 90, 0]) plate_screw();
226 #translate([-board_thickness/2, -13, thickness-board_thickness/2]) rotate([-90, 0, 0]) plate_screw();
227 translate([-board_thickness/2, -13, bottom_thickness/2 + board_thickness/2 + zdelta]) rotate([-90, 0, 0]) plate_screw();
228 } else if (frame_type == frame_box) {
229 translate([16, 30, bottom_thickness+4]) rotate([0, -90, 0]) {
233 translate([-board_thickness/2, -11, thickness/2]) rotate([-90, 0, 0]) plate_screw();
240 if (frame_type == frame_alu) {
241 // 2020 aluminum frame parts are larger
242 translate([0, -60, 0]) zmotorholder(thickness=55, bottom_thickness=6);
243 translate([0, 60, 0]) mirror([0, 1, 0]) zmotorholder(thickness=55, bottom_thickness=6);
245 translate([110 + board_thickness, board_thickness+10, 0]) rotate([0,0,90]) zrodholder(thickness=board_thickness * 2 + 5, ylen = board_thickness * 2 + 10, bottom_x=48, bottom_thickness=6);
246 translate([110 + board_thickness, -(board_thickness+10), 0]) rotate([0, 0, -90]) mirror([0, 1, 0]) zrodholder(thickness=board_thickness * 2 + 5, ylen = board_thickness * 2 + 10, bottom_x=48, bottom_thickness=6);
250 translate([10, -50, 0]) zmotorholder();
251 translate([0, 50, 0]) mirror([0, 1, 0]) zmotorholder();
252 translate([67, 14, 0]) rotate([0,0,90]) zrodholder();
253 translate([77, -14, 0]) rotate([0, 0, -90]) mirror([0, 1, 0]) zrodholder();