OpenFlexure Microscope OpenSCAD docs

upright_large_gears.scad

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OpenFlexure Microscope: Gears for actuators *
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This is part of the OpenFlexure microscope, an open-source *
microscope and 3-axis translation stage. It gets really good *
precision over a ~10mm range, by using plastic flexure *
mechanisms. *
This file generates a small gear, for motor control. *
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(c) Richard Bowman, January 2016 *
Released under the CERN Open Hardware License *
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module printable_large_gears_four(ratio=2)

[Source]

module printable_large_gears_four(ratio=2){
    // Calculate the spacing from the gear pitch radius.
    // Add 4mm of clearance
    spacing_x = large_gear_pitch_radius(ratio) + large_gear_pitch_radius(ratio=2) + 4;
    spacing_y = 2*large_gear_pitch_radius(ratio=2) + 4;
    repeat([0, spacing_y, 0], 2, center=true){
        translate([-spacing_x/2, 0, 0]){
            large_gear(ratio=ratio);
        }
        translate([spacing_x/2, 0, 0]){
            large_gear(ratio=2);
        }
    }
}