StenoToppers

Convert your keyboard into a stenotype!
Version 1.2.0

Get them from the releases page!

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Visit the hall of fame! Submit your own prints through the Issues tab, or by editing the Wiki directly!

Update

The StenoToppers keycap set now includes number bar (numbar) keys (since version 1.1.0). These keys are much like normal keys, but they fit on the same level as the StenoToppers and sit nice and close together.

Two additional print assemblies have been made available - one for just the numbar keys, and another for the full set including the numbar keys.

Preface

This repository contains the 3D design files for the "StenoToppers", including and [a detailed CAD drawing][cad-pdf] and 3D models. The branch "[generic-models][generic-branch]" has files (in STL format) that should work with any proper 3D modeling software (such as [AutoDesk 123D][123d-editor] or [Blender][blender]). This branch (master) contains the part files and assemblies for [AutoDesk Inventor 2016][inventor], from which the STL files are derived.

Note that StenoToppers are designed for use with a mechanical keyboard that supports [N-key rollover (NKRO)][nkey], alongside the fantastic open source [Plover][plover] software. If you're interested in learning more about typing at the speed of thought, see the [Plover Blog][plover-blog].

If it all seems too hard:<br> 3D model and printing work is currently fiddly and time consuming. If you want a quicker solution that is guaranteed to work on any steno-ready keyboard, then we heartily recommend the [Laser-Cut Keytoppers][keytoppers] ($20 USD + $Shipping) from the [Plover Store][plover-store]¹. These are secured to existing keycaps with some sturdy "adhesive foam" and are reportedly easy to set up.

It is left as an excercise to bored DIY steno-enthusiasts to design and manufacture injection-moulded parts, which will inherently fit better and feel lighter.

If it all seems too easy:<br> As this is an open source project, you are very welcome (and encouraged) to make and sell StenoToppers by your own means, under the terms of the license. In short, just make sure clients are aware that the project is open source and that they retain the same freedom to use this project as you do.

Anyway, on with the show.

What are StenoToppers?

StenoToppers are a set of custom 3D printed keycaps which convert a mechanical keyboard into a stenotype look-alike. They are designed to fit any keyboard with Cherry MX keyswitches or any "identical" Cherry MX clone.

The whole point of these keycaps is to slightly raise, compact and align the top two rows of keys (making it easier to chord them) and move the thumb-keys comfortably above the space-bar and into a more ergonomic position. Without StenoToppers, it is harder to press two keys with one finger and thumbs can become very sore trying to avoid the spacebar all the time.

A Note on Key Spacing

Notice how StenoToppers make the keys look a fair bit wider than normal keycaps. This is because StenoToppers utilize almost the entire keycap base to allow multiple keys to be pressed at once. On a QWERTY keyboard, pressing multiple keys at once is often undesirable, so keycaps heavily taper off to provide substantial space around them - too much space for speedy stenography.

Also, note that although they line up horizontally (ortholinear), your keyboard is likely to have a non-standard slope angle to the base. This means that and keys are likely to be vertically offset by two millimeters, and may collide. This shouldn't affect stenography in any noticeable way once [fitted properly][fitting-guide].

For more detailed dimensions and specifications, check out the [drawing PDF][cad-pdf].

Types of StenoToppers

Note that there are four variants of the keycap: standard, large, small and thumb. The standard keycaps are in majority and line up most of the top row's keys. The small and large variants are meant to go on the end of each row (in the right place, of course) so the rows match up with existing keys that are still staggered (like enter and tab). The small and large variants are required so the end of each row fits, but if the keyboard is otherwise empty of keys, they are optional. Thumb keys have no offset on the keycap stem, so they will fit in straight up-and-down.

How to get StenoToppers

StenoToppers are 3D printed items. If you are lucky enough to have access to a 3D printer, then you can likely print these off yourself for very little cost. For the rest of us normal people, online services like [Shapeways][shapeways-store] and [Sculpteo][sculpteo] can print the models for you, albeit at a much higher cost. For even more money, you could even get them done in [nylon][shapeways-nylon] or [steel][shapeways-steel]!

The models have been prepared on [Shapeways][shapeways-store], in the "Logical Store".

Note: Try to avoid super expensive materials. The ABS and PLA materials are verified on home printers, but things like steel or aluminium are not verified to fit. See the [fitting guide][fitting-guide] for more information.

Printing

Printable models are available from the [generic-models][generic-branch] branch. All released versions can also be downloaded directly from the [project website][project-website] or the [Github Releases Page][github-releases].

Print Stats:

| Full Print | | | :---------: | :--: | | Bounding box (Machine Space) | 130mm x 100mm x 20mm (208cm³) | | Print mass | ~53g | | Print material volume | ~51cm³ | | Print filament length | ~7.6m | | Average Time | ~11.5 hours (at normal quality) | | Average material cost | $3 (assuming $50 for a 1kg reel) | | Shapeways cost | Strong and Flexible, White: $60<br>Strong and Flexible, Black: $61 |

| Test Print | | | :---------: | :--: | | Bounding box (Machine Space) | 62mm x 40mm x 20mm (49cm³) | | Print mass | ~10g | | Print material volume | ~9.6cm³ | | Print filament length | ~1.4m | | Average Time | ~3.2 hours | | Average material cost | 60 cents |

| Single Keycap | | | :---------: | :--: | | Bounding box (Machine Space) | 130mm x 100mm x 20mm (208cm³) | | Print mass | ~2g | | Print material volume | ~1.9cm³ | | Print filament length | ~28 cm | | Average Time | ~40 mins | | Average material cost | 12 cents (i.e. Negligible) |

Custom Keycap Sets

Sometimes, the "final" and "test" pre-compiled packages aren't what you're looking for. If, for example, you want to print a set of 350 standard keys (not sure why) then you'll need to make a custom assembly. If you're unfamiliar with 3D printing or 3D modelling, this may seem like a difficult task, however with tools such as [AutoDesk Meshmixer][meshmixer] or [Meshlab][meshlab] this task is relatively easy. When you download the models, you will have access to the individual keycap models. For a full keyboard, you should be printing 2 large, 2 small, 4 thumb and 18 standard stenotoppers.

There are guides on how to merge STL files all over the place. Here is just a couple:

• Meshmixer: Combining Models
• Merging STL Files
• Editing and merging STL files. How-to and an offer. Any interest?

Pre-print checklist

<input type="checkbox"> Line width is close to (or less than) 0.5mm <input type="checkbox"> Layer height is close to (or less than) 0.3mm <input type="checkbox"> Printing with the top of the keycap(s) facing the print bed <input type="checkbox"> Using a raft to avoid "elephant's foot" <input type="checkbox"> Using 60% infill or above (for final-quality print) <input type="checkbox"> Have at least 9m of filament on the spool.

Minimum 3D Printer Specs

• Min Print bed size: 130mm x 100mm x 20mm for full print
  • Theoretically, you could make do with a 20mm x 20mm x 20mm if you were willing to do multiple prints.
• Max Layer height (for a good-quality print): 200 microns (0.2mm)
• Max Extrusion width: 500 microns (0.5mm) - aim for lower (0.4 or 0.3)

An Important Note on Clearances

Because the Cherry MX stem is a standard size, it is important that the keycaps are printed so they fit snugly. For this reason, proper printer calibration is very important. Keyboards may vary, but ideally they will have the same key spacing and stem dimensions.

It's more complex than it sounds to get true-to-model dimensions, because different printers have varying tolerances (i.e. the printer will affect how much the printed object is different from the model). This is because things shrink as they cool. Some printers change their cooling settings or do over-extrusion in an attempt to correct thi