Sofa Desktop / Keyboard Table for Couch Gaming & Work

by Light Arts Design (LAD)

This sofa desktop is designed to provide a stable and comfortable surface for keyboard, mouse, gaming, or light work directly from the couch.
It is ideal for relaxed PC use in the living room (TV setup) or casual home-office use where a traditional desk is not practical.

Adjustable & Couch-Friendly Design

The table features adjustable, extendable feet, allowing it to adapt to different sofa heights and seat cushions.
This ensures a stable position on a wide variety of couches, regardless of seat depth or softness.

Dimensions & Technical Drawing

All dimensions and measurements are clearly shown in the technical drawing included with this project.
The drawing is provided in millimeters and shows the assembled size as well as individual parts.

Modular Construction

The desktop consists of multiple printed parts designed to be assembled into a rigid and stable structure.

Due to typical 3D-printing shrinkage and material tolerances, some parts may fit slightly tighter or looser depending on:

• printer calibration
• filament type
• print settings

Assembly Method Used

The following assembly method was used successfully:

• Individual parts were aligned and pinned together
• Pins were placed using a small amount of acetone filament slurry
• Parts were bonded with acetone filament slurry
• During curing, the assembly was held under tension using packing cord to ensure tight and even contact between joint surfaces

This resulted in a solid and durable final structure.

How to Make and Use Acetone Filament Slurry

An acetone filament slurry is used to chemically bond printed parts by slightly dissolving the surface of the plastic, creating a chemical weld once cured.

Materials Needed

• Acetone (pure, technical or laboratory grade)
• Small glass or metal container with a lid (acetone-resistant)
• Scrap filament or failed prints made from the same material as the parts (typically ABS or ASA)
• Brush or small spatula

⚠️ Safety equipment is mandatory:
Use protective gloves, safety glasses, and a mask, and work in a well-ventilated room.

⚠️ Important:
This method works only with acetone-soluble filaments such as ABS or ASA.
It does not work with PLA or PETG.

Preparing the Slurry

1. Cut or break filament scraps into very small pieces to increase surface area.
2. Place the pieces into the container.
3. Add a small amount of acetone until the filament is just covered.
4. Close the container and let it sit for several hours or overnight.
5. Stir occasionally until a thick, paste-like liquid forms.

The consistency should be similar to thick glue or honey — not too hard, but not too liquid.

• Too thin → add more filament
• Too thick → add a few drops of acetone

⚠️ Be aware: all tools used for stirring or spreading will be permanently coated with filament once the acetone evaporates.

Applying the Slurry

1. Lightly sand and clean the mating surfaces if needed.
2. Apply a thin layer of slurry to both contact surfaces.
3. Press the parts together firmly.
4. Clamp, strap, or tie the parts to maintain pressure during curing.
5. Allow the joint to cure for at least 12–24 hours.

Once cured, the bond becomes a chemical weld, often stronger than the surrounding printed material.

Safety Notes

• Always work in a well-ventilated area
• Avoid skin contact and inhalation
• Keep acetone away from heat, sparks, and open flames

Design Attribution & Gridfinity Information

All parts of this model were fully designed and drawn by me, except for the 42 mm Gridfinity containers.

The included Gridfinity containers were created using the Gridfinity Generator and are provided only as an example of how the embedded system can be used.

You can generate your own custom Gridfinity boxes here:
👉 [https://gridfinitygenerator.com/de](https://gridfinitygenerator.com/de)

The Gridfinity grid embedded in the table uses the standard 42 mm Gridfinity spacing, ensuring full compatibility with existing Gridfinity systems.

Hardware Requirements 

The following hardware is required and not included in the print files:

• 12× M10 × 30 mm threaded handles
• 12× M10 nuts

Example sources used for this project:

• Handles: [https://de.aliexpress.com/item/1005006421294775.html](https://de.aliexpress.com/item/1005006421294775.html)
• Nuts: [https://de.aliexpress.com/item/1005010129176023.html](https://de.aliexpress.com/item/1005010129176023.html)

Equivalent hardware from other suppliers can be used as long as the dimensions match.

Printing Notes & Known Issues

During printing, slight material shrinkage caused some joint surfaces not to align perfectly without post-processing.
This is common with larger prints and depends heavily on:

• filament material
• cooling behavior
• wall thickness
• print orientation
• enclosure temperature

At the time of release, a definitive solution for completely eliminating this effect is not known.
If gaps occur at the joints, they can be filled with acetone slurry — this was the method used for the final assembly.

Light sanding, careful alignment, and adhesive bonding are recommended.

Intended Use

• Couch gaming
• Keyboard & mouse use
• Casual PC work
• Living-room setups