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133 lines
4.0 KiB
133 lines
4.0 KiB
/////////////////////////////////////////////////////////////////////////////////
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// Left holder part to anchor PCB with in the etching bath.
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//
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// Author: Maximilian Stiefel
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// Last modification: 17.06.2017
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/////////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////////
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// Vars
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/////////////////////////////////////////////////////////////////////////////////
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// Dimesions holder
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holder_height = 160;
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holder_width = 15;
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holder_depth = 6;
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// Dimensions notch
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notch_height = 115;
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// Calculations to construct a triangle which can take a PCB
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biggest_pcb = 2;
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c = biggest_pcb + 1;
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x = c/sqrt(2);
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y = sqrt( pow(x,2) - pow(c/2,2) );
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// General allowance
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allowance = 0.5;
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// Dimensions crossbar
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crossbar_height = 5 + allowance;
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crossbar_width = 5 + allowance;
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// Dimensions lid
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lid_thickness = 4;
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lid_slot_width = 8;
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// Dimensions neck
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neck_diameter = holder_depth;
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neck_height = lid_thickness + allowance;
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// Dimensions head
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head_width = holder_width;
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head_depth = holder_depth;
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head_height = 5;
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// Dimensions bar that PCB does not fall down
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bar_width = holder_width/2;
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bar_depth = 5;
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bar_height = 2;
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// Suitable for M3 screw thread
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hole_diameter = 2.5;
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// Air system diameter
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air_system = 10;
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// Height difference between notch for PCB and the actual holder
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height_diff_1 = holder_height - notch_height;
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// Width difference between crossbar and holder
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width_diff_1 = holder_width - crossbar_width;
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// My color for everything
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myColor = "FireBrick";
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/////////////////////////////////////////////////////////////////////////////////
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// Action
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/////////////////////////////////////////////////////////////////////////////////
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color(myColor)
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difference()
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{
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union()
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{
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// Cube for the base holder
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cube([holder_width, holder_depth, holder_height], center = false);
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// Head
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translate([0, 0, holder_height + neck_height])
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cube([head_width, head_depth, head_height]);
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// Neck
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translate([holder_width/2, holder_depth/2, holder_height])
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cylinder(h = neck_height, r = neck_diameter/2);
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// Bar, that PCB does not fall
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translate([holder_width/2 - bar_width/2, -bar_depth, height_diff_1/2 - bar_height])
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cube([bar_width, bar_depth, bar_height]);
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// Text
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translate([holder_width/2 + 3, holder_depth, 0.2*holder_height])
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rotate([90,0,180])
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linear_extrude(height = 3, center = true, convexity = 10, twist = 0)
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text("R", size = 10, valign = "center");
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translate([holder_width, 0, (1/4)*height_diff_1 + 6])
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rotate([90, 0, 90])
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linear_extrude(height = 2, center = true, convexity = 10, twist = 0)
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text("M3", size = 3, valign = "center");
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translate([0, holder_depth/2, holder_height/2])
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rotate([90, -90, 270])
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linear_extrude(height = 2, center = true, convexity = 10, twist = 0)
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text("Maximilian Stiefel 2017", size = 3, valign = "center");
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}
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union()
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{
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// Cube for notch
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//translate([holder_width/2 - notch_width/2, -notch_depth +2, height_diff_1/2])
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//cube([notch_width, notch_depth, notch_height], center = false);
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// Triangular notch
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translate([-c/2 + holder_width/2, -0.01, height_diff_1/2])
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linear_extrude(height = notch_height, center = false)
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polygon(points=[[0,0],[c/2,y], [c,0]], paths = [[0,1,2]]);
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// Slots for crossbars
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translate([width_diff_1/2, -1, (1/4)*height_diff_1 - crossbar_height/2])
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cube([crossbar_width, holder_depth + 2, crossbar_height], center = false);
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translate([width_diff_1/2, -1, (3/4)*height_diff_1 + notch_height - crossbar_height/2])
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cube([crossbar_width, holder_depth + 2, crossbar_height], center = false);
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// Drill holes for screws
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translate([holder_width/2, holder_depth/2, (1/4)*height_diff_1])
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rotate([0, 90, 0])
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cylinder(h = 9, r = hole_diameter/2);
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translate([holder_width/2, holder_depth/2,(3/4)*height_diff_1 + notch_height])
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rotate([0, 90, 0])
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cylinder(h = 9, r = hole_diameter/2);
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// Holes for the air system
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translate([holder_width/2, holder_depth + 1, 0])
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rotate([90, 0, 0])
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cylinder(h = holder_depth + 2, r = air_system/2);
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}
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}
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