225 lines
8.2 KiB
OpenSCAD
225 lines
8.2 KiB
OpenSCAD
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$fn=60;
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// Physical dimensions
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EXTRUSION_WIDTH = 40;
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EXTRUSION_HEIGHT = 40;
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EXTRUSION_GROOVE_WIDTH = 8.2;
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MOTOR_WIDTH = 43.0;
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MOTOR_HEIGHT = 43.0;
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MOTOR_DEPTH = 40.0;
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MOTOR_CORNER = 4.5;
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MOTOR_SHAFT_HOLE_DIAMETER = 24;
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BOLT_HOLE_DIAMETER = 6.4; // M6
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BOLT_HOLE_HEAD_DIAMETER = 11; // M6
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// Parameters
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CORNER_SIZE = 5.0; // Part corner size
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MOTOR_TO_BORDER_CLEARANCE = 8.0;
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CHAMFER_SIZE = 0.4;
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EXTRUSION_BORDER_CLEARANCE = 1; // Distance between extrusion and part borders
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EXTRUSION_GROOVE_SLIDE_CLEARANCE = 0.2; // Slide to groove clearance
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EXTRUSION_GROOVE_SLIDE_DEPTH = 2; // Slide depth
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// Variables
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total_width = EXTRUSION_WIDTH - EXTRUSION_BORDER_CLEARANCE + MOTOR_WIDTH + MOTOR_TO_BORDER_CLEARANCE;
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total_height = EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE + MOTOR_HEIGHT + MOTOR_TO_BORDER_CLEARANCE;
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base_p = [
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[0, CORNER_SIZE],
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[0, total_height - CORNER_SIZE],
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[CORNER_SIZE, total_height],
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[total_width - CORNER_SIZE, total_height],
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[total_width, total_height - CORNER_SIZE],
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[total_width, CORNER_SIZE],
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[total_width - CORNER_SIZE, 0],
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[CORNER_SIZE, 0]
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];
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motor_p = [
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[0, MOTOR_CORNER],
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[0, MOTOR_HEIGHT - MOTOR_CORNER],
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[MOTOR_CORNER, MOTOR_HEIGHT],
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[MOTOR_WIDTH - MOTOR_CORNER, MOTOR_HEIGHT],
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[MOTOR_WIDTH, MOTOR_HEIGHT - MOTOR_CORNER],
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[MOTOR_WIDTH, MOTOR_CORNER],
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[MOTOR_WIDTH - MOTOR_CORNER, 0],
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[MOTOR_CORNER, 0]
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];
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module hexagon(ri = 1.0) // inner radius of hexagon
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{
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ra = ri*2/sqrt(3);
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circle(r = ra, $fn=6);
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}
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module m3nut(height)
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{
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linear_extrude(height) hexagon(5.6 / 2);
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}
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module groove(s)
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{
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groove_p = [
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[0, 0],
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[0, EXTRUSION_GROOVE_SLIDE_DEPTH - 0.6],
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[0.6, EXTRUSION_GROOVE_SLIDE_DEPTH],
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[EXTRUSION_GROOVE_WIDTH - 0.6, EXTRUSION_GROOVE_SLIDE_DEPTH],
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[EXTRUSION_GROOVE_WIDTH, EXTRUSION_GROOVE_SLIDE_DEPTH - 0.6],
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[EXTRUSION_GROOVE_WIDTH, 0],
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];
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translate([0,s,0])
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rotate([90,0,0])
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linear_extrude(s)
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polygon(groove_p);
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}
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module base()
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{
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union()
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{
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hull()
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{
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linear_extrude(2)
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offset(-4)
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polygon(base_p);
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translate([0, 0, 2])
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linear_extrude(14)
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offset(-1.75)
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polygon(base_p);
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translate([0, 0, 16])
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linear_extrude(8)
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polygon(base_p);
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}
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// Grooves
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translate([EXTRUSION_WIDTH / 2 - EXTRUSION_GROOVE_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE, 0, 2+14+8])
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groove(10.5 + EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE);
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translate([EXTRUSION_WIDTH / 2 - EXTRUSION_GROOVE_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE,
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10.5 + EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE + 9,
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2+14+8])
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groove(11);
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translate([EXTRUSION_WIDTH / 2 - EXTRUSION_GROOVE_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE, 10.5 + EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE + 9 + 11 + 9, 2+14+8])
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groove(11.5);
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translate([0, EXTRUSION_HEIGHT / 2 - EXTRUSION_GROOVE_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE + EXTRUSION_GROOVE_WIDTH, 2+14+8])
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rotate([0,0,-90])
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groove(10.5 + EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE);
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translate([10.5 + EXTRUSION_WIDTH - EXTRUSION_BORDER_CLEARANCE + 9, EXTRUSION_HEIGHT / 2 - EXTRUSION_GROOVE_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE + EXTRUSION_GROOVE_WIDTH, 2+14+8])
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rotate([0,0,-90])
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groove(11);
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translate([10.5 + EXTRUSION_WIDTH - EXTRUSION_BORDER_CLEARANCE + 9 + 11 + 9, EXTRUSION_HEIGHT / 2 - EXTRUSION_GROOVE_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE + EXTRUSION_GROOVE_WIDTH, 2+14+8])
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rotate([0,0,-90])
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groove(11.5);
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}
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}
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motor_shaft_hole_radius = MOTOR_SHAFT_HOLE_DIAMETER / 2;
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motor_center_x = EXTRUSION_WIDTH - EXTRUSION_BORDER_CLEARANCE + MOTOR_WIDTH / 2;
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motor_center_y = EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE + MOTOR_HEIGHT / 2;
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difference()
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{
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base();
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translate([-EXTRUSION_BORDER_CLEARANCE, -EXTRUSION_BORDER_CLEARANCE, -1])
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cube([EXTRUSION_WIDTH, EXTRUSION_HEIGHT, 29]);
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translate([EXTRUSION_WIDTH - EXTRUSION_BORDER_CLEARANCE, EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE, 5])
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linear_extrude(20)
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polygon(motor_p);
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// Motor holes
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translate([motor_center_x, motor_center_y, -1])
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cylinder(20, r=motor_shaft_hole_radius);
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translate([motor_center_x - 31/2, motor_center_y - 31/2, -1])
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cylinder(20, r=3.4/2);
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translate([motor_center_x + 31/2, motor_center_y - 31/2, -1])
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cylinder(20, r=3.4/2);
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translate([motor_center_x - 31/2, motor_center_y + 31/2, -1])
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cylinder(20, r=3.4/2);
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translate([motor_center_x + 31/2, motor_center_y + 31/2, -1])
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cylinder(20, r=3.4/2);
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// Chamfers
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translate([motor_center_x, motor_center_y, -0.01])
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cylinder(1, motor_shaft_hole_radius+0.5, motor_shaft_hole_radius);
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translate([motor_center_x - 31/2, motor_center_y - 31/2, -0.01])
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cylinder(1, (3.4+0.5)/2);
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translate([motor_center_x + 31/2, motor_center_y - 31/2, -0.01])
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cylinder(1, (3.4+0.5)/2);
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translate([motor_center_x - 31/2, motor_center_y + 31/2, -0.01])
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cylinder(1, (3.4+0.5)/2);
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translate([motor_center_x + 31/2, motor_center_y + 31/2, -0.01])
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cylinder(1, (3.4+0.5)/2);
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// Groove holes
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translate([EXTRUSION_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE, 10.5 + EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE + 4.5, 11.2])
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cylinder(35, r = BOLT_HOLE_DIAMETER / 2);
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translate([EXTRUSION_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE, 10.5 + EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE + 9 + 11 + 4.5, 11.2])
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cylinder(35, r = BOLT_HOLE_DIAMETER / 2);
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translate([10.5 + EXTRUSION_WIDTH - EXTRUSION_BORDER_CLEARANCE + 4.5, EXTRUSION_HEIGHT / 2 - EXTRUSION_BORDER_CLEARANCE, 11.2])
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cylinder(35, r = BOLT_HOLE_DIAMETER / 2);
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translate([10.5 + EXTRUSION_WIDTH - EXTRUSION_BORDER_CLEARANCE + 9 + 11 + 4.5, EXTRUSION_HEIGHT / 2 - EXTRUSION_BORDER_CLEARANCE, 11.2])
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cylinder(35, r = BOLT_HOLE_DIAMETER / 2);
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// Bolt head holes
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translate([EXTRUSION_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE, 10.5 + EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE + 4.5, -1])
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cylinder(12, r = BOLT_HOLE_HEAD_DIAMETER / 2);
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translate([EXTRUSION_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE, 10.5 + EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE + 9 + 11 + 4.5, -1])
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cylinder(12, r = BOLT_HOLE_HEAD_DIAMETER / 2);
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translate([10.5 + EXTRUSION_WIDTH - EXTRUSION_BORDER_CLEARANCE + 4.5, EXTRUSION_HEIGHT / 2 - EXTRUSION_BORDER_CLEARANCE, -1])
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cylinder(12, r = BOLT_HOLE_HEAD_DIAMETER / 2);
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translate([10.5 + EXTRUSION_WIDTH - EXTRUSION_BORDER_CLEARANCE + 9 + 11 + 4.5, EXTRUSION_HEIGHT / 2 - EXTRUSION_BORDER_CLEARANCE, -1])
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cylinder(12, r = BOLT_HOLE_HEAD_DIAMETER / 2);
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// Bold head chamfers
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translate([EXTRUSION_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE, 10.5 + EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE + 4.5, -0.01])
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cylinder(1, (BOLT_HOLE_HEAD_DIAMETER+1) / 2, BOLT_HOLE_HEAD_DIAMETER / 2);
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translate([EXTRUSION_WIDTH / 2 - EXTRUSION_BORDER_CLEARANCE, 10.5 + EXTRUSION_HEIGHT - EXTRUSION_BORDER_CLEARANCE + 9 + 11 + 4.5, -0.01])
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cylinder(1, (BOLT_HOLE_HEAD_DIAMETER+1) / 2, BOLT_HOLE_HEAD_DIAMETER / 2);
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translate([10.5 + EXTRUSION_WIDTH - EXTRUSION_BORDER_CLEARANCE + 4.5, EXTRUSION_HEIGHT / 2 - EXTRUSION_BORDER_CLEARANCE, -0.01])
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cylinder(1, (BOLT_HOLE_HEAD_DIAMETER+1) / 2, BOLT_HOLE_HEAD_DIAMETER / 2);
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translate([10.5 + EXTRUSION_WIDTH - EXTRUSION_BORDER_CLEARANCE + 9 + 11 + 4.5, EXTRUSION_HEIGHT / 2 - EXTRUSION_BORDER_CLEARANCE, -0.01])
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cylinder(1, (BOLT_HOLE_HEAD_DIAMETER+1) / 2, BOLT_HOLE_HEAD_DIAMETER / 2);
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}
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