mirror of
https://github.com/nophead/Mendel90.git
synced 2025-01-17 04:48:15 +01:00
e9b6ff5101
Y bearing mounts made all the same and switch tab made smaller. Manual updated to reflect those changes. Mod to ATX short bracket to make bridges work. Base of support structure on dust filter made thicker. JHeadMK5 made default on sturdy and mendel variants. Melzi and ATX PSU made default on strudt variant as well. Fixed case error in use of ATX_PSU_brackets. Fixed missing screw length for resistors on MDF.
241 lines
11 KiB
OpenSCAD
241 lines
11 KiB
OpenSCAD
//
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// Mendel90
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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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// Rail supports
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//
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include <conf/config.scad>
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include <positions.scad>
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nut_trap_meat = 4; // how much plastic above the nut trap
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wall = 3;
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function bar_clamp_inner_rad(d) = d / 2;
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function bar_clamp_outer_rad(d) = bar_clamp_inner_rad(d) + bar_clamp_band;
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function bar_clamp_stem(d) = bar_clamp_inner_rad(d) + bar_clamp_outer_rad(d) + bar_clamp_tab - 2;
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function bar_clamp_length(d) = bar_clamp_tab + bar_clamp_stem(d) + bar_clamp_tab;
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function bar_rail_offset(d) = bar_clamp_tab + d / 2 + bar_clamp_band;
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function bar_clamp_switch_y_offset() = 12;
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function y_switch_x(w) = -w / 2 - bar_clamp_switch_y_offset();
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function y_switch_y(d) = bar_clamp_inner_rad(d) + microswitch_thickness() / 2 + 2;
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function y_switch_z(h) = h + microswitch_button_x_offset();
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function bar_clamp_switch_x_offset() = y_switch_y(Y_bar_dia);
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function bar_clamp_switch_z_offset() = microswitch_button_x_offset();
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module bar_clamp_holes(d, yaxis) {
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nut = yaxis ? base_nut : frame_nut;
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nut_offset = (yaxis ? base_nut_traps : frame_nut_traps) ? -bar_clamp_tab / 2 + nut_radius(nut) + 0.5 : 0;
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for(y = [bar_rail_offset(d) - bar_clamp_length(d) + 0.5 * bar_clamp_tab - nut_offset,
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bar_rail_offset(d) - 0.5 * bar_clamp_tab + nut_offset])
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translate([0, y, 0])
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child();
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}
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module bar_clamp(d, h, w, switch = false, yaxis = false) {
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stl(str(yaxis ? "y_bar_clamp" : "z_bar_clamp", (switch && yaxis) ? "_switch" : ""));
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nutty = yaxis ? base_nut_traps : frame_nut_traps;
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mount_screw = yaxis ? base_screw : frame_screw;
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nut_depth = nut_trap_depth(screw_nut(mount_screw));
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gap = 1.5;
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inner_rad = bar_clamp_inner_rad(d);
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outer_rad = bar_clamp_outer_rad(d);
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stem = bar_clamp_stem(d);
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length = bar_clamp_length(d);
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rail_offset = bar_rail_offset(d);
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cavity_l = stem - 2 * wall;
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cavity_h = h - nut_trap_meat - nut_trap_depth;
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cavity_w = w - 2 * wall;
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sbracket_length = -y_switch_x(w) + 4;
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sbracket_thickness = 7;
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sbracket_height = microswitch_length();
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tab_height = part_base_thickness + (nutty ? nut_depth : 0);
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color(clamp_color) {
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translate([0, rail_offset, 0]) {
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union() {
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difference() {
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translate([0,-length/2,0]) rotate([90,0,90]) linear_extrude(height = w, center = true, convexity = 6) {
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difference() {
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union() {
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translate([0, tab_height / 2, 0])
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square([length, tab_height], center = true); // base
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translate([0, h / 2, 0])
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square([stem, h], center = true); // stem
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translate([(stem/2 - outer_rad), h, 0])
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circle(r = outer_rad, center = true); // band
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translate([-stem/2 ,h,0])
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square([stem - outer_rad, outer_rad]); // band tab
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}
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translate([(stem/2 - outer_rad), h, 0])
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poly_circle(r = inner_rad, center = true); // bore
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translate([-rail_offset, h, 0])
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square([stem, gap]); // gap
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}
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}
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//
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// plastic saving cavity
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//
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translate([0, -cavity_l / 2 - bar_clamp_tab - wall, cavity_h / 2 - eta])
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cube([cavity_w, cavity_l, cavity_h], center = true);
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//
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// nut trap
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//
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translate([0,-length + 1.5 * bar_clamp_tab,0])
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rotate([0,0,90])
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nut_trap(screw_clearance_radius, nut_radius, h - nut_trap_meat, horizontal = true);
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//
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// mounting holes
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//
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translate([0, -rail_offset, tab_height])
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bar_clamp_holes(d, yaxis)
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rotate([0,0,90])
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if(nutty)
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nut_trap(screw_clearance_radius(mount_screw), nut_radius(screw_nut(mount_screw)), nut_depth, true);
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else
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tearslot( h = 100, r = screw_clearance_radius(frame_screw), center = true, w = 2); // mounting screw
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if(!yaxis)
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translate([-w / 2 - axis_end_clearance,
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outer_rad + microswitch_thickness() / 2 - rail_offset,
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h - outer_rad + microswitch_first_hole_x_offset()])
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rotate([0, 90, 90])
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microswitch_holes();
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*translate([0,-50,-1]) cube([100,100,100]); // cross section for debug
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}
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if(switch && yaxis) { // switch bracket
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difference() {
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union() {
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translate([w / 2 -sbracket_length,
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y_switch_y(d) + microswitch_thickness() / 2 - rail_offset,
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y_switch_z(h) - microswitch_button_x_offset() - microswitch_length() / 2])
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cube([sbracket_length, sbracket_thickness, sbracket_height]);
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translate([w / 2 - eta - sbracket_thickness,
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y_switch_y(d) - microswitch_thickness() / 2 - rail_offset +0.5,
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y_switch_z(h) - microswitch_button_x_offset() - microswitch_length() / 2])
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cube([sbracket_thickness,
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y_switch_y(d) - outer_rad + microswitch_thickness() / 2 + 1,
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h - (y_switch_z(h) - microswitch_button_x_offset() - microswitch_length() / 2)]);
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}
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translate([y_switch_x(w), y_switch_y(d) - rail_offset, y_switch_z(h)])
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mirror([0,1,0]) rotate([0, 90, 90])
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microswitch_holes();
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if(!nutty)
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translate([0, - 0.5 * bar_clamp_tab - 0.5,0]) // screwdriver access
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rotate([0,0,90])
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teardrop(h = 100, r = 3, center = true, truncate = false);
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}
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}
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}
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}
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}
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}
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module bar_clamp_assembly(d, h, w, switch = false, yaxis = true) {
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inner_rad = bar_clamp_inner_rad(d);
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outer_rad = bar_clamp_outer_rad(d);
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length = bar_clamp_length(d);
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rail_offset = bar_rail_offset(d);
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color(clamp_color) render() bar_clamp(d, h, w, switch, yaxis);
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//
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// screw and washer for clamp
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//
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translate([0, rail_offset - length + 1.5 * bar_clamp_tab, h + inner_rad + bar_clamp_band])
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screw_and_washer(cap_screw, screw_longer_than(outer_rad + nut_trap_meat + washer_thickness(washer) + nut_thickness(nut, true)));
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//
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// Captive nut
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//
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translate([0, rail_offset - length + 1.5 * bar_clamp_tab, h - nut_trap_meat])
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rotate([180, 0, 90])
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nut(nut, true);
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//
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// mounting screws and washers
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//
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bar_clamp_holes(d, yaxis)
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translate([0, 0, part_base_thickness])
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rotate([0, 0, 90])
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if(yaxis)
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base_screw(part_base_thickness);
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else
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frame_screw(part_base_thickness);
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//
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// limit switch
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//
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if(switch)
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if(yaxis)
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translate([y_switch_x(w), y_switch_y(d), y_switch_z(h)])
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mirror([0,1,0]) rotate([0, 90, 90]) {
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microswitch();
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microswitch_hole_positions()
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screw_and_washer(No2_screw, 13);
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}
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else
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if(top_limit_switch)
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translate([-w / 2 - limit_switch_offset,
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outer_rad + microswitch_thickness() / 2,
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h - outer_rad + microswitch_first_hole_x_offset()])
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rotate([0, 90, 90]) {
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microswitch();
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microswitch_hole_positions()
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screw_and_washer(No2_screw, 13);
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}
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}
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module y_bar_clamp_assembly(d, h, w, switch = false) {
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bar_clamp_assembly(d, h, w, switch, yaxis = true);
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}
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module z_bar_clamp_assembly(d, h, w, switch = false) {
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bar_clamp_assembly(d, h, w, switch, yaxis = false);
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}
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//bar_clamp(Z_bar_dia, gantry_setback, bar_clamp_depth, true);
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module y_bar_clamp_stl() translate([0,0,bar_clamp_depth/2]) rotate([0,90,0]) bar_clamp(Y_bar_dia, Y_bar_height, bar_clamp_depth, false, true);
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module y_bar_clamp_switch_stl() translate([0,0,bar_clamp_depth/2]) rotate([0,90,0]) bar_clamp(Y_bar_dia, Y_bar_height, bar_clamp_depth, true, true);
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module z_bar_clamp_stl() translate([0,0,bar_clamp_depth/2]) rotate([0,90,0]) bar_clamp(Z_bar_dia, gantry_setback, bar_clamp_depth, false, false);
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module z_bar_clamp_switch_stl() translate([0,0,bar_clamp_depth/2]) rotate([0,90,0]) bar_clamp(Z_bar_dia, gantry_setback, bar_clamp_depth, true, false);
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module bar_clamps_stl() {
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y2 = bar_clamp_length(Z_bar_dia) - bar_clamp_tab + 2;
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y3 = y2 + bar_clamp_length(Y_bar_dia) - bar_clamp_tab + 2;
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rotate([0, 0, 180]) z_bar_clamp_switch_stl();
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translate([2, -2 * bar_rail_offset(Z_bar_dia) + bar_clamp_length(Z_bar_dia), 0]) z_bar_clamp_stl();
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translate([-10, y2, 0]) rotate([0, 0, 180]) y_bar_clamp_switch_stl();
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translate([12, y2 -2 * bar_rail_offset(Y_bar_dia) + bar_clamp_length(Y_bar_dia), 0]) y_bar_clamp_stl();
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translate([0, y3, 0]) rotate([0, 0, 180]) y_bar_clamp_stl();
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translate([2, y3 -2 * bar_rail_offset(Y_bar_dia) + bar_clamp_length(Y_bar_dia), 0]) y_bar_clamp_stl();
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}
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if(0)
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bar_clamps_stl();
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else {
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z_bar_clamp_assembly(Z_bar_dia, gantry_setback, bar_clamp_depth, true);
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//bar_clamp(Z_bar_dia, gantry_setback, bar_clamp_depth, true, false);
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//translate([30, 0, 0]) y_bar_clamp_assembly(Y_bar_dia, Y_bar_height, bar_clamp_depth, true);
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//translate([30, 0, 0]) bar_clamp(Y_bar_dia, Y_bar_height, bar_clamp_depth, true, true);
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}
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