QIDI X-smart3 Top Cover Riser – Modular Frame + Sliding Vent Back Wall

I designed this modular top lid riser because I couldn’t find anything similar for my setup.
It’s my first self-designed part in Fusion 360, so it’s not perfect yet—but it works well for me and I’m happy with the result.

The main idea was to solve two problems at once:

1. More control over enclosure temperature / airflow (depending on the filament)

2. More clearance for the PTFE tube, so it doesn’t rub against the glass top lid anymore

What it does

• Raises the top cover/lid of an enclosed 3D printer

• Gives the PTFE tube more room so it can move freely

  • No more rubbing against the glass lid

  • Less friction, less vibration, smoother filament feeding

  • In my case this results in more stable printing behavior (especially during fast moves)

• Lets you decide how much heat stays inside:

  • Keep it more closed to retain heat for ASA/ABS prints

  • Open the rear vent holes to increase airflow and reduce heat build-up for PLA/TPU

This makes the printer more flexible: closed/warmer chamber when needed, and more ventilation when needed.

Modular construction

The riser is made from separate parts so it’s easy to print, replace, and remix.

This model consists of:

• Corners

• Walls (front/left/right/back sections)

• Connectors (small joining pieces)

• Back wall (perforated) + sliding vent insert
  The back wall includes ventilation holes and a sliding insert that you can move to:

  • open the holes (more airflow)

  • close the holes (keep more heat inside)

I originally experimented with the rear wall idea because I wanted something adjustable without needing multiple different versions.

Remix-friendly

Everyone is welcome to print, test, modify and remix this design.
If you improve it (better fit, stronger connectors, different hole pattern, etc.), I’d really love to see your makes/remixes!

Printing notes / settings

• Supports: ✅ Required (at least for the corner parts / overhangs)

• Material: I printed it in ASA.
  PLA can also work, but keep in mind PLA can soften if the enclosure gets very warm (especially when the vent is closed and you print high-temp materials).

• Suggested settings (good starting point):

  • Layer height: 0.20 mm (0.28 is also fine with a 0.6 nozzle)

  • Perimeters/Walls: 3

  • Infill: 15–25%

  • Brim: recommended for ASA (warp protection)

Fit/tolerances:
If connectors are slightly loose/tight, minor scaling or a tiny bit of sanding usually fixes it. Different materials shrink differently (ASA vs PLA), so a small tolerance change is normal.

Assembly

1. Print all parts (corners, walls, connectors, vent parts)

2. Join the walls to the corners using the connector pieces (press-fit)

3. Install the perforated back wall and slide the vent insert to the desired opening

4. Optional: If you want a permanent build, add a small drop of CA glue at the connectors

Tip: If you’re unsure, print one corner + one wall + one connector first to verify fit before printing the full set.

Notes / Disclaimer

• This is my first design, so please expect small imperfections.

• Tolerances may vary depending on printer calibration, material shrinkage and slicer settings.

• If you find issues or have improvement ideas, feel free to comment — I’m happy to learn and update it.