Voron Switchwire Build Guide — Complete Step by Step

Switchwire Build Guide Beginner

The Voron Switchwire is unique in the Voron family: it's the only bedslinger design. While the V2.4 and Trident move the toolhead in both X and Y while the bed moves only in Z, the Switchwire moves the bed in Y and the toolhead in X — just like an Ender 3 or Prusa i3. This makes it the most approachable Voron build for newcomers, the most affordable, and the best option if you already own an Ender 3 and want to convert it. Last updated: May 2025.

This guide covers the complete Switchwire build process: understanding the bedslinger architecture, frame assembly, the linear rail conversion (the single most impactful upgrade), wiring and electronics, Klipper configuration specific to bedslinger kinematics, tuning for print quality, and enclosure considerations. Whether you're building from a Formbot kit, converting an Ender 3, or sourcing parts yourself, you'll find everything you need here.

Understanding the Switchwire Design

The Switchwire is fundamentally different from every other Voron. Before you start building, understand what makes it special:

• Bedslinger kinematics: The bed moves forward and backward (Y axis) while the toolhead moves left and right (X axis). Z movement is accomplished by raising the gantry. This is the same kinematics as an Ender 3, CR-10, or Prusa MK3.
• Single Z motor: Unlike the V2.4's 4 Z motors or the Trident's 3, the Switchwire uses a single Z motor driving a leadscrew. Simpler, cheaper, but requires careful Z alignment.
• Fixed gantry: The X gantry is fixed in position and only moves up and down (Z). The bed moves under it. This means the frame is simpler (no moving gantry weight), but print speed on the Y axis is limited by the moving bed mass.
• 300mm build volume: Standard Switchwire is a 300x300x300mm cube, though you can build smaller or larger. The 300mm size is the sweet spot — big enough for useful parts, small enough to keep the bedslinger motion manageable.

Switchwire vs V2.4 vs Trident — Key Differences

If you're deciding which Voron to build, here are the practical differences:

• Speed: The V2.4 and Trident can reach 300-500mm/s with 20k+ acceleration due to their lighter moving mass (toolhead only). The Switchwire is limited to 80-150mm/s with 3k-5k acceleration because the heavy bed moves in Y.
• Cost: A Switchwire kit costs $250-$400 vs $600-$900 for a Trident and $800-$1200 for a V2.4. If budget is your primary concern, the Switchwire is the clear winner.
• Print quality: All three can produce excellent prints. The Switchwire's bedslinger kinematics mean Y-axis ringing is more difficult to eliminate (heavier moving mass), but with proper input shaper tuning, the difference is minimal for functional parts.
• Complexity: The Switchwire has roughly half the parts count of a V2.4. No Z belts, no gantry leveling system, no chamber thermistor, no exhaust fan. Build time is 15-25 hours vs 40-60 hours for a V2.4.
• Enclosure: The Switchwire is harder to enclose because the bed moves forward — you need a flexible door or a sliding panel. The V2.4 and Trident are naturally enclosed (fixed bed, moving gantry).

Ender 3 Conversion vs Full Kit

The Switchwire was designed with conversion in mind. The original V1.0 was literally called the "Ender Switchwire" — a drop-in conversion for Creality Ender 3 printers. Here's what you need to know:

Ender 3 Conversion

If you already own an Ender 3 (or Ender 3 Pro, V2, or Neo), you can convert it to a Switchwire using printed parts and a hardware kit. You reuse:

• The 2040 aluminum extrusion frame (though you'll need to cut the uprights to 400mm)
• The bed (if flat — the standard Ender 3 bed works, but a cast aluminum tooling plate is better)
• The stepper motors (if they're NEMA 17 with adequate torque — the stock Ender 3 motors work)
• The power supply (the Meanwell LRS-350-24 from the Ender 3 is adequate)

You will need to buy: the Voron printed parts kit (or print them yourself if you have another printer), linear rails (MGN9 for X and Z, MGN12 for Y), an SKR Mini E3 V3 or comparable controller board, a Voron-spec hotend (Revo Voron or Dragon UHF), and the Switchwire-specific hardware kit (screws, standoffs, pulleys, belts, Z leadscrew).

Full Kit Build

If you're starting from scratch, a Formbot or LDO Switchwire kit includes everything: frame extrusions (pre-cut and tapped), printed parts, linear rails, motion components, electronics (controller board, stepper drivers, PSU), hotend, and all hardware. The Formbot kit runs ~$300 and ships from China. The LDO kit is ~$400 with higher quality components (LDO motors, genuine Gates belts, F695 bearings). For first-time builders, the LDO kit is worth the premium — the included manual and component quality reduce troubleshooting time significantly.

Linear Rail Conversion — X, Y, and Z

The single most impactful upgrade on the Switchwire is replacing the stock Ender 3 v-slot wheels with linear rails. The Switchwire ships with rails in the design for good reason:

• X axis (MGN9H — 300mm): The toolhead carriage rides on a single MGN9 rail. The H (heavy) carriage is recommended for the extra rigidity with the Stealthburner toolhead. Mount the rail with the flat side against the extrusion and the carriage facing forward.
• Y axis (MGN12H — 350mm): The bed rides on two MGN12 rails (or one MGN12 + linear rod depending on your kit). The 12mm rail is wider than the 9mm, providing better load distribution for the heavy bed. Tension the bed mounting screws evenly — 2-3Nm max — to avoid binding.
• Z axis (MGN9H — 250mm): The X gantry rides on two MGN9 rails (left and right uprights). These must be perfectly parallel to each other and perfectly perpendicular to the base. Any misalignment here will cause Z binding and inconsistent first layers.

Rail preparation: New linear rails come packed in a rust-preventative grease that is NOT suitable for 3D printing use. Before installation, flush the rails with isopropyl alcohol (90%+) or a degreaser, then apply a thin coat of Mobilux EP 2 or Super Lube EP2 grease. Work the carriage back and forth until the grease is distributed evenly and the carriage moves smoothly end-to-end. A properly prepared rail should move with consistent resistance across its entire travel — no tight spots.

Gantry alignment (critical): After mounting both Z rails, install the X gantry and check that it moves up and down freely. If it binds at any point, loosen the Z rail mounting screws, run the gantry to the binding spot, tighten while the gantry is at that spot, and recheck. Repeat until the gantry moves smoothly through the full 300mm Z range with the motor disconnected.

Wiring and Electronics

The Switchwire electronics are simpler than other Vorons because there's no chamber electronics bay. Everything mounts on the left side of the frame:

• Controller board: The SKR Mini E3 V3 is the most popular choice — it's cheap ($35), widely available, and has the right number of stepper drivers (4 — X, Y, Z, extruder). The BTT Manta M4P or M8P are also excellent options with more expandability.
• Stepper drivers: TMC2209 or TMC2226 in UART mode for silent, reliable operation. Set the run_current to 0.8A for the X/Y/Z motors and 1.0A for the extruder. The stock Ender 3 motors (0.8-1.0A rated) work fine at these currents.
• Hotend wiring: The Stealthburner toolhead uses a standard 14-pin harness. For the Switchwire, you'll need 4 wires for the hotend heater (2) and thermistor (2), 4 wires for the extruder motor, 2 wires for the part cooling fan, and 2 wires for the hotend fan. CAN bus is optional but clean.
• Bed wiring: The bed heater (standard 300x300mm silicon heater, ~300W) and the 100k NTC thermistor. Use 14AWG or 12AWG silicone wire for the heater. The bed moves in Y, so the wires must be routed through a cable chain or a flexible trough.
• Endstops: Mechanical microswitches for X, Y, and Z. The Switchwire does NOT use Z probe for homing — you home X and Y to the endstops, and Z to the switch on the toolhead. This is critical for the Klipper configuration.

Klipper Configuration for Bedslinger Kinematics

The Switchwire Klipper config is different from other Vorons. Here are the critical specifics:

# In printer.cfg — Switchwire-specific settings

[stepper_x]
step_pin: PB13
dir_pin: !PB12
enable_pin: !PB14
microsteps: 16
rotation_distance: 40
endstop_pin: ^PC0  # X min endstop
position_endstop: 0
position_max: 300
homing_speed: 50
homing_retract_dist: 5

[stepper_y]
step_pin: PB10
dir_pin: !PB2
enable_pin: !PB11
microsteps: 16
rotation_distance: 40
endstop_pin: ^PC1  # Y min endstop
position_endstop: 0
position_max: 300
homing_speed: 50
homing_retract_dist: 5

[stepper_z]
step_pin: PB0
dir_pin: PC5
enable_pin: !PB1
microsteps: 16
rotation_distance: 8
endstop_pin: probe:z_virtual_endstop
position_min: -0.5
position_max: 300
homing_speed: 15

[bed_screws]
screw1: 30,30
screw2: 270,30
screw3: 270,270
screw4: 30,270
    

Key Switchwire-specific Klipper notes:

• Z virtual endstop: The Switchwire uses the Z probe (usually an inductive probe on the toolhead) as the Z endstop. Configure [probe] section with z_virtual_endstop in [stepper_z]. This ensures the Z height is always relative to the probe trigger point, not a physical switch.
• Bed screws: Use the PROBE_CALIBRATE command to set Z offset, then use BED_SCREWS_ADJUST or SCREWS_TILT_CALCULATE to level the bed. The Switchwire bed leveling is identical to an Ender 3 — manual screws, paper test, repeat.
• Pressure advance: Start with pressure_advance: 0.04 for direct drive and 0.5 for Bowden. The Switchwire's moving bed makes PA even more important — the Y axis ringing from the heavy bed amplifies corner bulging. See our Pressure Advance Guide for tuning.
• Input shaper: The Switchwire needs different shapers for X and Y. X axis (toolhead only, light) benefits from MZV or EI. Y axis (heavy bed) benefits from ZV or 2HUMP EI. The heavy Y mass means input shaper works wonderfully — Y ringing is sharp and easy to cancel.

Print Quality Expectations and Tuning

The Switchwire produces excellent prints — on par with any other Voron for functional parts. Here's what to expect:

• X axis quality: Excellent, comparable to V2.4. The light toolhead (350-400g with Stealthburner) allows 5k-8k acceleration on X. Ghosting on X is minimal with input shaper.
• Y axis quality: Good, but you'll see more ringing on Y than X due to the 800-1000g moving bed mass. Expect to run Y acceleration at 3k-5k vs 8k on X. Input shaper helps dramatically — 2HUMP EI can cancel Y ringing at higher accelerations.
• First layer: The Switchwire produces some of the best first layers of any Voron because the single Z leadscrew is simple and reliable. Once trammed correctly, the bed stays level for weeks.
• Overhangs and bridges: Identical to other Vorons with the same toolhead. With a Stealthburner and 5015 part cooling fan, overhangs up to 65 degrees are clean at 60mm/s.
• Max recommended speeds: 100-120mm/s for quality functional parts, 150mm/s for draft prints. Y axis is the bottleneck — pushing over 150mm/s on Y causes the bed mass to induce ringing that even input shaper can't fully cancel.

Enclosure Options

Enclosing a bedslinger is harder than enclosing a CoreXY, but it's doable:

• Flexible door: The most common approach. Build a 3-sided enclosure with a flexible PVC curtain or a folding accordion door on the front. The door opens out of the way while printing and closes when the bed retracts. This maintains chamber temperature at 40-50C — enough for ABS but not enough for polycarbonate.
• Sliding panel: A rigid front panel on drawer slides. The bed slides forward and the panel slides sideways. More complex but looks cleaner. Requires precise alignment so the panel doesn't bind.
• No enclosure: The Switchwire runs ABS perfectly fine without an enclosure if you use a brim and print in a room without drafts. The heated bed (100-110C) creates a local warm zone. For occasional ABS printing, skip the enclosure entirely.
• Chamber temperature: Even with a good enclosure, the Switchwire chamber stays at 40-45C max because the bed moves and can't be fully sealed. If you need high-temp materials (PC, PEEK, PEI), the Switchwire is not the right machine — choose a Trident or V2.4 instead.

For most users, we recommend building a 3-sided enclosure from 5mm clear acrylic or polycarbonate panels with a flexible PVC curtain on the front. Total cost: $50-80. This is sufficient for ABS, ASA, and all common engineering filaments.