Voron V0.2 Build Guide

V0.2 Beginner 25 min read

The Voron V0.2 is the perfect entry point into the Voron ecosystem — a compact 120mm³ CoreXY printer that prints at impressive speeds. This guide walks you through every step of the build process. Last updated: May 2025

Before You Start

You'll need the following tools and materials:

• Voron V0.2 sourced parts kit (frame, motion, electronics)
• Soldering iron with a small chisel tip
• Hex drivers (1.5mm, 2mm, 2.5mm, 3mm)
• Digital calipers
• Loctite blue (242) for critical fasteners
• Isopropyl alcohol for cleaning rails
• PTFE lubricant (SuperLube or similar)

Step 1: Frame Assembly

Start by assembling the 2020 extrusion frame. Lay out all extrusions and verify lengths against the BOM. The V0.2 uses M5 T-nuts and corner brackets. Hand-tighten all fasteners first, then go back and torque them to spec. Use a square to ensure all corners are 90°.

Pro tip: Assemble on a flat surface. A piece of float glass or a granite surface plate helps ensure the frame is perfectly square from the start.

Step 2: Z-Axis & Bed

Install the Z-axis lead screws and linear guides. The V0.2 uses a single lead screw driven by a NEMA 14 stepper motor. Mount the MGN7H rail to the Z carriage, ensuring it moves smoothly through its full range.

• Pre-lubricate the lead screw with PTFE grease
• Check that the Z carriage moves freely before wiring
• Mount the bed heater and thermistor, securing with Kapton tape
• Level the bed using the three spring-loaded screws

Step 3: Gantry Assembly

The XY gantry uses MGN7H linear rails on both X and Y axes. Mount the gantry plates, belts, and pulleys. Belt tension is critical — aim for 2-3 N/cm using a tension gauge, or adjust by feel until the belts produce a low bass note when plucked.

Step 4: Wiring

The V0.2 wiring is straightforward. Follow these steps in order:

1. Route the stepper motor cables along the cable chain
2. Wire the hotend thermistor and heater cartridge
3. Connect the bed thermistor and heater
4. Wire the endstop switches (X, Y, Z)
5. Connect the part cooling fan and hotend fan
6. Wire the display (if using mini12864)

Important: Double-check all wiring against the Voron wiring diagram before powering on. A wiring mistake can damage your controller board.

Step 5: Firmware

The V0.2 runs Klipper firmware on a Raspberry Pi (or equivalent). Flash the controller board with the Klipper firmware, then configure printer.cfg with your specific hardware setup. Key configuration items:

• Stepper rotation distance and microstepping
• Endstop positions and homing speed
• PID tuning for bed and hotend
• Input shaper calibration
• Pressure advance tuning

Step 6: First Print

Before your first print, run through this checklist:

• ✅ All screws tightened
• ✅ Belt tension checked
• ✅ Bed leveled (paper method + mesh leveling)
• ✅ Z offset calibrated
• ✅ Extruder calibration (e-steps)
• ✅ PID tuning complete
• ✅ Filament loaded and extruding cleanly

Print a calibration cube first (20x20x20mm). Check dimensional accuracy and first layer adhesion. Tweak your slicer profile until the cube measures exactly 20mm in all dimensions.

Troubleshooting

My Z-axis is binding

Loosen the lead screw coupling nut and re-tighten while the carriage is at mid-height. This centers the lead screw in the anti-backlash nut.

My first layer is inconsistent

Run a bed mesh (BED_MESH_CALIBRATE) and verify your Z offset. The V0.2's small bed is sensitive to Z offset changes of 0.01mm.

Print quality is poor

Check belt tension first. Then verify input shaper and pressure advance calibration. If you're using a stock hotend, consider upgrading to a Rapido or Revo Voron for more consistent extrusion.