https://github.com/peter-mount/mms-expansioncase
A simple external expansion enclosure for the MISTer Multi System case
https://github.com/peter-mount/mms-expansioncase
Last synced: 5 months ago
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A simple external expansion enclosure for the MISTer Multi System case
- Host: GitHub
- URL: https://github.com/peter-mount/mms-expansioncase
- Owner: peter-mount
- License: cc-by-sa-4.0
- Created: 2021-12-09T13:32:27.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2022-01-07T14:37:53.000Z (over 4 years ago)
- Last Synced: 2024-12-06T21:38:29.525Z (over 1 year ago)
- Language: OpenSCAD
- Size: 325 KB
- Stars: 2
- Watchers: 3
- Forks: 0
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
This is a simple concept of an expansion enclosure for the MISTer Multi System
case.
It's designed in OpenSCAD and is intended to sit underneath the MMS case:
It's configurable for it's height, images above are 50mm and the cutout's on
the top can be turned off if required - the ones here matches those on the MMS case
although there is an additional one for under the SNAC/Dust cover if needed.
There's the option of placing a similar fan to the one in the main case present
and a slot at the back for a backing plate.
# This is a work in progress, so it's not complete in any manner!
## Generating STL's
You need OpenScad installed and on the command line, preferably 2021.01 or later.
Edit the root Makefile and edit the following lines with the location of your install:
export OPENSCAD = OpenSCAD-2021.01-x86_64.AppImage
export OPENSCAD_OPTS = --export-format binstl
Here I have an AppImage in my path so I'm using that directly.
### Using earlier versions of OpenSCAD
You can use versions earlier than 2021.01 but if you do and the build fails due to the
`--export-format` option not being recognised then remove it from `OPENSCAD_OPTS`.
This will, however, mean you are generating Ascii STL's not Binary ones which are
about 5 times the size.
## Running the build
To generate the STL's simply run
make clean all
All the possible combinations will be generated in the build directory.
### Concurrent renders
This will take a while but if you have the CPU and Memory capacity use the -j option to
make so that multiple renders are done at the same time.
For example:
make -j8 clean all
will render 8 stl's at the same time.
This will reduce the time taken.
For example a single threaded build takes approximately 10 minutes but on my machine -j32 takes just 36 seconds.
Just make certain the value you pick is less than the number of cores/threads available on your CPU.
## Enclosure
The generated stl's have the following naming convention:
Name of the part, `top` or `base`
Then a `_` delimited list of the options applied.
For example, `top_tc_tp_bf.stl` is the top part with top cutouts, pins & back plate.
These are the current options:
| Option | Description | Applies to |
| ------ |---------------------------------------------------------------------------------------|------------|
| tc | Cutout top access points for cables to go though | top |
| sc | Optional cutout under the SNAC port / dust cover | top |
| tp | Add pegs on the top to stop MMS from sliding off | top |
| bc | Optional base access points for cables to go though, for stacking multiple enclosures | base |
| bf | Space for a faceplate at the back | top base |
| ff | Space for a faceplate at the front | top base |
## Face plates
There are currently two faceplate options available:
| Option | Description |
|--------------------|--------------------------------------------------------------------------------------------------------------|
| faceplatePlain.stl | A plain blank faceplate |
| faceplateFlush.stl | A blank faceplate but with the centre raised so the front appears to be flush with the rest of the enclosure |
## Pegs
If you have printed a top with the `tp` option for pegs then you also need to print `pegs.stl` which contains a set of
pegs that will insert into them and prevent the MMS from sliding off the enclosure.
## Customising
### Enclosure height
There's one more configurable setting which is the **external** height of the enclosure.
It defaults to 50mm but if you want to increase that height then edit `global.scad` and change the
`height` variable.
Do not reduce the height below 50mm otherwise the fan will not fit.
All released STL's are with the default height.
### Adding parts
To add custom parts via OpenSCAD code you need to implement the following three modules:
module enclosureRemoveBefore() {}
module enclosureAdd() {}
module enclosureRemoveAfter() {}
These three get called at specific places during constructing the enclosure, but before it is split
into the two halves.
The enclosure is built along the following lines:
module enclosure() {
difference() {
union() {
difference() {
// Outer hull
// Cut out inside, fan and grille
// back & front faceplate holders
// cutouts
enclosureRemoveBefore();
}
// Add support struts
// Add internal posts
enclosureAdd();
}
// Remove internal post holes
enclosureRemoveAfter();
}
}
`enclosureRemoveBefore()` is for cutting out anything before the internal features
are added.called first during a difference, so you can use it to remove parts from the enclosure.
`enclosureAdd()` is for adding new internal structures and
`enclosureRemoveAfter()` for any final removals.
#### Example
This example is based on the parts/top_tc_tp_bf.scad generated file but covers the basics:
// The settings for the standard options, 0=disable, 1=enable
topCutouts = 1;
snacCutout = 0;
baseCutouts = 0;
topPegs = 1;
backFaceplate = 1;
frontFaceplate = 0;
// Include global.scad and enclosure.scad - change path as necessary
include <../global.scad>;
include <../enclosure.scad>;
// The part to render, either top(), bottom() or plate()
// If your part exists across both halves then you'll beed to print it
// once with each.
top();
// The hooks, place your code, or references to it in these
module enclosureRemoveBefore() {
}
module enclosureAdd() {
}
module enclosureRemoveAfter() {
}