In Case of Emergency Break Glass (Parametric Case)

Break in (Parametric) Case

The case has been created through parametric modelling in Fusion 360, so you can easily resize the design as desired and print it!

There are 2 Case models available:

• Print in place case model
• Split model, the hinge has a groove to attache the lid

Stls for the chain and hammer as also under Files.

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Assembly Material

Apart of the printed files it will be needed:

• Glue or double side tape for attaching the “Glass” to the lid
• Optional:
  • Screws if you wish to mount it to the wall
  • "Glass" preferable plexiglass or other transparent plastic sheets 

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Files

The case model consist of different bodies/compontents:

• Box
• Lid
• Text ( both upper and lower)
• Hammer Hook ( holds the chain and the hammer)
• Box Feet ( to make the case stand by itself, if it will not be hanged on the wall)
• Glass ( if you wish to print it with transparent filament)

Remove the undesired bodies just by hiding them( by clicking on the eye before the name), they will not be added in the final Stl.

Case

Hammer

There are two hammer versions available, one with a sided hole for hanging it directly and another without the hole ( it is possible to use the chain for hanging) take the one you prefer.

Chain

There are two chains, one that can be printed in place ( low bed adhesion and high overhang) or an easy to print version, that needs to be assembled.

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Parameter Edition

In order to edit the design download and open the fusion file. Once loaded, open the parameter control window: "Modify> (fx) Change parameters"
 

The following window will open:

Simply click to the  Expression cell (Expresión in the picture) and modify the value to resize the case. Under favourite, there have been selected the main parameters needed

The box and lid attributes ( width, height, depth) are for the interior of the case, so it can be easily modified to fit the desired object in it. 

Important Parameters when resizing: Lid and Text

When resizing the box there are two parameters that have to be taken in account so the model it is functional:

Lid Clearance

Resizing the box and the lid can make that the lid collides with the box when closing, in order to check and avoid this there is a analysis view and two parameters to can be used:

Lid_offset: by increasing this value the distance between the box and the closing side of the lid will be increased.

Lid_depth: the depth of the lid can also help to avoid the crash. Do not reduce this value too much, this will affect the closing mechanism.

Check if there is any collisions by:

1. Turning on the “Analysis > Seccion 1”: this will open a cut view of the case.

2. Click on the blue flag, to activate the hinge joint motion and rotate the lid

Values can be entered for a more precise placement of the lid.

Hide the Analysis ( by clicking on the eye) to see the full box again.

Text

When reducing the box width the text might not fit.

To fix this, it is possible to change the text size: Modify always the bottom text first, it might fix the position for the upper text automatically.

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Make sure that the letters width is not smaller than the nozzle diameter!

It is possible to modify the Text, double click on the history at this icon to open the sketch:

Note: In case of no multicolour print available, check the Text_depth. Set it to layer height and pause the print manually to swap the colour, or set it higher and print the text aside.

Printable Glass

A new component has been added to the design, an easy re-sizable glass in case it is desired to print it instead of using extra parts.

The glass should adjust itself to the size of the box, it is possible to modify the overlap and the thickness ( this should be the same as the layer height) with he following parameters:

The idea came from LordGnu who printed a box adjusted to the box size and the thickness to the layer height . The print settings used where:

Monotonic surface pattern with the model rotated 45 degrees.

Here there is a cool guide for printing transparent PETG.

Export the model to Stl

For printing in place leave the joint at 180º

Use the 3D printing functionality, under "Utilities> Make",  and by selecting the top element of the navigator tree, the visible bodies will be exported as Stl.

Open the Stl in your favourite slice, if done in Prusaslicer and derivatives it is possible to split the different objects, for easy colouring.

Assembly

When adding the “Glass”, leave a space on both sides otherwise it can difficult the closing of the box.

Enjoy the model!

Remember to add your makes. I'm looking forward to see them and get some feedback :)