OpenSCAD - 3D Printing Projects

Caged Ball Bearing

Thingiverse URL: www.thingiverse.com/thing:2224678

Sample Prints

Parametric Butt Hinge

Thingiverse URL: www.thingiverse.com/thing:2187167

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Gusset Parameters

Parabolic

• Input values.

$$w \quad \text{...Gusset width.}$$

$$h \quad \text{...Hinge leaf height.}$$

$$r \quad \text{...Knuckle radius is equal to the leaf gauge.}$$

$$g \quad \text{...Leafe gauge.}$$

• Compute the parabolic point of contact with the knuckle cylinder.

$$s = w \space + \space r \quad \text{...Cartesian position of the point where the gusset curve merges with the leaf.}$$

$$i = \sqrt { 8 \cdot r^2 + s^2 } \quad \text{...Common root.}$$

$$x = \dfrac{ i - s }{2} \quad \text{...x intercept.}$$

$$y = \sqrt { r^2 - x^2 } \quad \text{...y intercept.}$$

• Compute coefficient $a$ of vertex form parabola.

$$a_n = \sqrt[4]{ 2 } \cdot \sqrt[4]{ s \cdot ( i - s ) - 2 \cdot r^2 } \quad \text{...Numerator}.$$

$$a_d = \sqrt{ s \cdot ( 5 \cdot s - 3 \cdot i ) + 4 \cdot r^2 } \quad \text{...Denominator.}$$

$$a = \dfrac{a_n}{a_d}$$

$$y = a^2 \cdot ( x - s )^2$$

Circular

• Input values:

$$w \quad \text{...Gusset width}$$

$$g \quad \text{...Knuckle radius}$$

• Compute gusset radius: The radius of the circle, that is tangential to the knuckle cylinder.

$$r = \dfrac{ 2 \cdot g \cdot w \space + \space w^2}{ 2 \cdot g}$$

• Compute gusset height: The point of intersection between the knuckle cylinder and the gusset cutter.

$$h = \dfrac{ g \cdot r }{ \sqrt{ 2 \cdot g \cdot w \space + \space g^2 \space + \space r^2 \space + \space w^2 } }$$

• Compute the intersection point between the knuckle and gusset cutting tool, using gusset height: The coordinates of the intersection point are, $p(x,h)$, where $h$ is the vertical value of the coordinate.

$$x = \dfrac{ h \cdot ( g \space + \space w ) }{ r }$$

Linear

• Input values.

$$w \quad \text{...Gusset width.}$$

$$h \quad \text{...Hinge leaf height.}$$

$$r \quad \text{...Knuckle radius is equal to the leaf gauge.}$$

$$r \quad \text{...Leafe gauge.}$$

• Compute gusset tangent gradient.

$$s = w + r \quad \text{...Cartesian position of the point where the gusset curve merges with the leaf.}$$

$$x = \dfrac{ r^2 }{ s }$$

$$y = \sqrt{ r^2 - x^2}$$

$$a = \dfrac{ y }{x - s}$$

$$b = -a \cdot s$$

None

Parametric Test Block

Thingiverse URL: www.thingiverse.com/thing:2224678

Sample Prints

Gear Tester

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3D Printer - Endpoint Upgrade Mount

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Cat-Food Sieve

• Mixed my cat's food.
• The vet told me not to mix it.
• So I 3D-printed a sieve to separate it again.

Sample Prints