Voron Switchwire Enclosure Guide — DIY High-Temp Enclosure

Switchwire Enclosure ABS Printing DIY 20 min read

The Voron Switchwire — whether built from the official BOM or converted from an Ender 3 — is a bedslinger design that presents unique enclosure challenges. Unlike the V2.4 or Trident, which have a fully enclosed frame designed around the enclosure panels, the Switchwire has an open frame with the bed moving in Y (front-to-back) and the gantry moving in X (left-to-right). Enclosing this requires a box that surrounds the entire machine while still providing access for filament changes, maintenance, and print removal.

Last updated: May 2025. This guide covers three enclosure approaches for the Switchwire — the simple acrylic box, the aluminum-framed panel enclosure, and the LACK table enclosure — with complete parts lists, prices, and step-by-step build procedures. All material costs reflect China-direct pricing through our sourcing mini-program.

Why Enclose Your Switchwire?

An enclosure provides several critical benefits for the Switchwire, especially if you print ABS, ASA, PC, or Nylon:

• Chamber temperature stability: ABS requires an ambient chamber temperature of 45-55°C to prevent warping and delamination. A draft-free enclosure maintains this temperature with the heated bed alone (100-110°C for ABS).
• Draft elimination: The Ender 3 / Switchwire's open frame is extremely susceptible to drafts. A 2 m/s airflow across the print area can cause 3-5mm of ABS corner lift on a 200mm part.
• Fume containment: ABS and ASA emit styrene fumes that are irritating and potentially harmful. An enclosure with activated carbon filtration (or external venting) makes the printer safe to operate indoors.
• Noise reduction: An enclosure reduces printer noise by 5-10 dB, making the Switchwire suitable for shared living spaces.
• Print quality improvement: Enclosed printers produce more dimensionally consistent parts because thermal expansion is uniform across the build volume. Warpage on large PLA parts is also reduced when the chamber is at 35-40°C.

Enclosure Option 1: The Acrylic Box (Budget, $35-55)

The simplest enclosure is a five-sided acrylic box that sits over the Switchwire. This is ideal for budget builders or those who want a quick enclosure without extensive modifications.

Materials List

Construction Steps

1. Cut panels: Have the acrylic cut to size at a local acrylic supplier or order pre-cut panels from Taobao. For a stock Switchwire with a 235x235mm build plate, the enclosure exterior dimensions should be approximately 500mm wide (X), 500mm deep (Y), and 500mm tall (Z). This gives 130mm clearance on all sides of the moving bed and gantry.
2. Assemble the box: Use Weld-On 4 acrylic cement to bond the four side panels to the top panel. Apply the cement along the seam with a needle applicator — capillary action will draw it into the joint. Clamp with painter's tape for 30 minutes while the joint cures. Do not use silicone or hot glue — these will not create an airtight seal and are chemically incompatible with ABS fumes.
3. Install the front door: Attach the front panel with two hinges on one side. Install the magnetic latch on the opposite side. The front panel must open fully for print removal — the Switchwire's Y-axis moves the bed forward by approximately 200mm, so the door should swing freely without interfering with the bed.
4. Cut wiring pass-throughs: Drill holes for the power cable, USB cable (if using USB to Pi), and PTFE filament guide. Use rubber grommets (10mm ID) to seal the cable holes — these cost $1 for a bag of 10 on AliExpress. For the filament pass-through, install an M10 threaded adapter in the top panel and feed the PTFE tube through it directly to the extruder.
5. Set the enclosure on the printer: The acrylic box simply sits on the Switchwire's base frame. The weight of the acrylic (approximately 2.5kg for 3mm panels) is sufficient to create a basic seal. For better temperature retention, add a strip of 10mm x 3mm silicone foam gasket around the bottom edge ($3-5 for 2 meters on AliExpress).

Pros: Cheap, fast to build, fully transparent for visibility. Cons: Low thermal mass means the chamber will cool rapidly when the door is opened; acrylic is prone to scratching and can warp above 70°C; the box is not flame-resistant.

Enclosure Option 2: Aluminum Frame + Polycarbonate (Standard, $80-130)

For a more permanent and thermally capable enclosure, build an aluminum extrusion frame with polycarbonate panels. This is the approach used in official Voron enclosures (V2.4, Trident) and is the best all-around solution for the Switchwire.

Materials List

Construction Steps

1. Build the frame: Assemble the 2020 extrusions into a 500mm cube using corner brackets. The frame sits around the existing Switchwire frame — it does not replace it. Use a machinist's square to ensure all 12 edges are perfectly 90 degrees. Tighten M5 bolts to 1.5 Nm. The frame should be freestanding and stable on the work surface. If the floor is uneven, add adjustable feet to the four bottom corners ($3 for a set of 4 on AliExpress).
2. Install bottom and top panels: The bottom panel (polycarbonate, 4mm) sits inside the frame on the bottom extrusions. It does not need to be load-bearing — the Switchwire's own frame supports the printer weight. Cut a hole in the bottom panel for the PSU ventilation if using an under-printer PSU mount. The top panel is identical but may have a hole for the filament pass-through adapter.
3. Install side and rear panels: Use panel clips (either Voron-style printed clips or commercial aluminum extrusion clips) to secure the polycarbonate panels to the 2020 frame. The clips should be spaced at 200mm intervals along each extrusion. Apply silicone gasket to the inner face of each extrusion before installing panels — this creates the airtight seal needed for temperature stability.
4. Install the front door: The front panel can be hinged on one side or configured as a lift-off panel. For daily use, hinges are preferred. Use 3D-printed hinge brackets that attach to the 2020 extrusion (STL available on the Voron mods GitHub). The door should overlap the frame by 10mm on all sides for proper sealing. Install a handle (a simple 3D-printed loop or metal pull handle, $2-3).
5. Add exhaust and intake ports: Install a 60mm or 80mm fan port in the top or rear panel for active exhaust. For ABS printing, a 60mm fan exhausting at 10-20% duty cycle through a carbon filter is sufficient to keep fumes manageable. The intake can be a passive filtered port on the opposite side. A set of 60mm fan filters plus mounting hardware costs approximately $5 on AliExpress.
6. Wire everything through a terminal block: Instead of drilling holes for each wire, install a 12-position terminal block on the rear frame extrusion. Pass all printer wires — 24V power, USB, thermistor extension, fan wires — through a single 25mm cable gland ($2) in the rear panel, then terminate at the terminal block inside. This makes enclosure removal for maintenance significantly easier.

Enclosure Option 3: The LACK Table Hack ($25-40)

The IKEA LACK table enclosure is a well-known community hack for Ender 3 printers. Two LACK tables ($10 each on the used market) stack vertically to create a 550x550x580mm enclosure. The LACK approach is the cheapest enclosure option but requires significant modification for proper temperature control.

Modifications Required

• Reinforce the legs: The LACK table's hollow legs will deform at 50°C chamber temperature. Fill each leg with 2-component epoxy resin or insert 20mm wood dowels. A 500ml epoxy kit costs $8-10 on Taobao.
• Seal the air gaps: The LACK table has significant gaps between the tabletop and the legs. Seal with 10mm foam gasket tape ($3 for 5 meters).
• Replace the cardboard panels: The LACK's interior shelf is corrugated cardboard — flammable at ABS chamber temperatures. Cut a 4mm polycarbonate replacement ($8-10).
• Add a front door: Cut a 400x400mm opening in the front panel and install a hinged acrylic or polycarbonate door. Use magnetic catches to hold it closed.
• Fire safety: The LACK table is made of particle board with a paper laminate — it is flammable. Install a fire suppression system (e.g., a BlazeCut automatic fire extinguisher tube mounted inside the enclosure, $15-20 on AliExpress).

Warning: The LACK enclosure is suitable only for low-temperature printing (PLA, PETG at chamber temps below 45°C). For ABS or high-temp printing, the aluminum-frame enclosure is strongly recommended due to fire safety concerns.

Chamber Temperature Management

Regardless of which enclosure type you build, temperature management is critical:

• Heated bed only: A bed at 100-110°C (ABS) in a 500x500x500mm enclosure will stabilize at 45-55°C within 30 minutes. No additional chamber heater is needed for ABS. For Nylon or PC (bed at 120-130°C), the chamber will reach 55-65°C.
• Active exhaust: Install a thermostat-controlled exhaust fan. Set the fan to activate at 55°C and turn off below 45°C. An STC-1000 temperature controller ($5-8 on AliExpress) with a 100W SSR relay and a K-type thermocouple is the standard solution.
• Never exceed 80°C: The Switchwire's stepper motors are rated for a maximum ambient temperature of 80°C. Above this, the motor magnets begin to demagnetize and the motor windings' insulation degrades. Monitor chamber temperature with a thermistor connected to your Klipper mainboard (add a [temperature_sensor chamber] section in printer.cfg).
• Electronics placement: The Raspberry Pi, mainboard, and PSU must be outside the enclosure. These components are rated for 0-50°C ambient and will fail prematurely at enclosure temperatures. Mount them on the rear of the enclosure or in a separate electronics compartment.

Filament Handling for Enclosed Printers

One practical challenge of an enclosed Switchwire is filament management. Options include:

• Drybox on top: Place a filament drybox (a sealed container with desiccant) on top of the enclosure. Run the PTFE tube through the top panel into the extruder. A 4-liter airtight container with a hygrometer costs $5-8 on AliExpress. Add 500g of silica gel desiccant for $3-5.
• Side-mount spool holder: Mount a spool holder to the side of the enclosure frame. This is simpler for filament changes but exposes the filament to chamber humidity. For ABS, this is usually fine (ABS is not hygroscopic), but for PC and Nylon, the drybox-on-top approach is mandatory.
• Reverse Bowden tube: If using a drybox located away from the printer, use a 3mm ID / 4mm OD PTFE tube as a reverse Bowden guide. The extruder pulls filament through the tube from the drybox with virtually no friction if the tube is properly supported every 500mm.

Safety Considerations

• Thermal runaway protection: Ensure Klipper's thermal runaway protection is enabled. The enclosure reduces heat loss from the hotend and bed, which can trigger false thermal runaway if the thresholds are too tight. Set the extruder thermal runaway timeout to 30 seconds and the bed timeout to 120 seconds of sustained deviation below setpoint.
• Smoke detector: Install a smoke detector inside the enclosure (a basic photoelectric smoke alarm, $3-5). Connect it to a relay that cuts 24V power to the printer if triggered.
• Automatic fire suppression: For unattended printing, install a fire suppression tube (BlazeCut or similar) rated for the enclosure volume. These tubes burst at 175°F (80°C) and release fire-suppressant aerosol.
• Electrical safety: All mains-voltage wiring (if using a PSU inside the enclosure) must be properly terminated in a strain-relief connector and rated for 105°C minimum. The 24V DC wiring is low risk but should still be fused at the PSU output with a 20A automotive blade fuse ($1 for 5 fuses).

An enclosed Switchwire is a capable machine that can produce ABS prints rivalling V2.4 quality at a fraction of the cost. Whichever enclosure route you choose, proper planning around temperature control, electronics placement, and fire safety will ensure many years of reliable printing.