Voron Kit Buying Guide: What to Check Before Ordering

A Voron kit is not a product with a model number; it is one vendor’s interpretation of a published bill of materials. Two kits sold for the same machine can differ in extrusion profile, rail grade, bed alloy, stepper spec and controller, and every one of those differences shows up later as either a good machine or a week of rework. Voron’s own documentation says it plainly: Voron does not implicitly endorse any specific vendor of Voron kits. The checks below are the ones that are cheap before you pay and expensive afterwards.

Settle the model first. If you are still choosing between the four designs, the Voron model comparison covers build volume, motor count and assembly difficulty. Everything here assumes you know which machine and, critically, which revision of it you intend to build.

Start from your own BOM, not the vendor’s list

Voron’s sourcing process starts on the Voron Design site: pick the printer, open the Configurator, choose your parameters, and it produces a bill of materials specific to that configuration. Print it. It is the document you check the kit against.

Two details from the documentation that catch people out:

• The generic sourcing guide quantities are mostly incorrect. The docs say so directly and tell you to defer to your generated BOM. Do not order from the generic list.
• Misumi part numbers in the BOM are exact and can be pasted straight into Misumi’s site. If a vendor’s extrusion is a substitute rather than the Misumi part, that is a difference worth understanding rather than assuming away.

Printed parts: the check that ruins the most builds

If the kit includes printed parts, the single most important question is what they are printed in.

Voron requires ABS or ASA. ABS has a glass transition temperature around 90 to 100 C with moderate stiffness and moderate ductility, which is what the machine’s structural parts need. ASA is fully supported with similar properties. The reason is stated in the documentation: chamber temperatures inside an enclosed Voron commonly reach 55 to 60 C, so any material used for printed parts should have a glass transition temperature of at least 80 C.

The documentation is equally explicit about what does not work:

Material	Why it is rejected
PLA	Glass transition around 55 to 60 C, too low, and lacks ductility
PETG	Thermal tolerance around 70 to 80 C, high failure rate
PA6 nylon	Creeps under bolt pressure
Polycarbonate	High stiffness, low ductility, cracks suddenly
Resin	Continues shrinking, creeps, fails catastrophically
CNC aluminium	About five times heavier and too rigid for parts that need flex

A kit advertising PETG printed parts is selling you a machine that will slowly lose its geometry in its own chamber. If you are printing the parts yourself, the sourcing guide’s settings are 0.2 mm layers, 40 percent infill using grid, gyroid, honeycomb, triangle or cubic, four walls, and no supports.

The sourcing FAQ gives filament quantities per model, explicitly assuming no failed or reprinted parts:

Model	Primary colour	Accent colour
V0	0.5 kg	0.2 kg
V1	1.2 kg	0.3 kg
Trident	1.4 kg	0.3 kg
V2	1.6 kg	0.3 kg
Switchwire	0.7 kg	0.2 kg

Those are floor figures, not order quantities. Nobody prints a full parts set with zero reprints, so add a spool of headroom on the primary colour rather than ordering exactly to the table and stalling the build waiting on filament.

One more: the FAQ recommends against a 0.6 mm nozzle for printing Voron parts, because some components have walls too thin for that diameter. Print them with a 0.4 mm nozzle.

Extrusion: the profile matters more than the brand

Check the extrusion profile against the rails, not just the dimensions. Voron’s sourcing documentation warns against V-slot extrusion specifically, because the V-slot and the width of an MGN9 linear rail are close enough to cause misalignment. If a kit ships V-slot to save money, that is a functional problem, not a cosmetic one.

For any non-Misumi extrusion, confirm the profile matches what the rail expects rather than assuming that “2020” is one thing.

Linear rails: grade is less important than slop

This is where money gets wasted in both directions. Voron’s FAQ is refreshingly blunt: generic MGN9H rails are fine and premium brands are not worth the money, because a printer imparts no side loads on the carriage the way a mill does, so a medium-preload rail is enough. The comparison it draws is that a set of seven V2 rails costs about the same as a single genuine mid-grade THK rail. What actually matters is that there is no slop or play between rail and carriage. Check the rails by feel when they arrive, before assembly, and reject anything that rocks.

The FAQ also gives a sorting rule most builders skip: clean and grease every rail, then put your best rail on X, the next best on Y, and the worst on Z. Z carries the least demanding motion, so that is where a mediocre rail does the least harm. Grade the set on arrival while returning one is still easy.

Two substitutions the documentation rules out:

• MGN12 cannot replace MGN9H. The V1 and V2 are designed for MGN9H only, and MGN12 carriages are wider than the 2020 extrusion they mount to, which causes interference.
• IGUS bushings are discouraged. The FAQ cites stiction on small movements, poor tolerances, excessive slop, and short life for the price.

The Voron Zero is the exception to the MGN9 assumption: its design is built around stock Makerbeam XL extrusion lengths and standard MGN7 rail lengths, which is also why scaling a V0 gets expensive quickly. Check the rail size a V0 kit ships against your generated BOM rather than assuming it matches a V2’s.

Budget for grease as well: the FAQ recommends Mobilux EP1 or EP2, or another synthetic-base grease with a base oil viscosity above 100 mm²/s, for the linear rails, and either Super Lube or EP1/EP2 for the extruder gears.

Bed plate: the alloy is a real specification

The bed is a heated aluminium plate that is thermally cycled for the machine’s whole life, and the alloy decides whether it stays flat. The reference is MIC6, and the FAQ’s answer to “I cannot find MIC6 anywhere” is that the following are all the same cast tooling plate under different trade names:

• Mic 6
• Alpase K100-S
• Alca 5
• Vista Metals ATP 5
• Alimex 5083, where the docs add that the vendor is very important on this one

The rejected list is specific rather than general: 6061, 5052, 5053, 2024, and any 7-series or 5-series alloy not named above. The stated reason is that none of them are designed for repeated heating and cooling cycles and they warp quickly. Note the trap in that list: 5083 is acceptable under the Alimex name while 5052 and 5053 are not, so “5-series aluminium” is not a useful shorthand either way. A kit that lists only “aluminium bed plate” with no alloy is worth a direct question before ordering, and “cast aluminium tooling plate” without a trade name is still not an answer.

Motors, drivers and the electronics count

Count the stepper drivers your model needs and check the board can supply them:

Model	AB motors	Z motors	Extruder	Drivers needed
V0.2	2	1	1	4
Trident	2	3	1	6
2.4	2	4	1	7

A 2.4 at seven drivers is the one that catches people, because a board sold as sufficient for “a Voron” may have been specified against a Trident. An eight-driver board leaves headroom; anything less means an expansion board you did not budget for.

On the motors themselves, the sourcing FAQ advises against 0.9 degree steppers on Z and E (on a Switchwire, just E), because those axes are already geared or screw driven and therefore already have the resolution. A 0.9 degree motor needs twice the steps for the same distance, and combined with microstepping that loads the board hard enough to limit travel speed. The FAQ’s blunt version: 1/16 microstepping with 0.9 degree XY motors plus pressure advance on a 1.8 degree extruder is enough to overwhelm the BOM-spec MCU on its own. 0.9 degree motors are only arguably worth it on the AB motors, and even there the FAQ says not to expect miracles.

Extruder motor size follows the toolhead, not the kit’s marketing. Voron’s hardware documentation pairs the Mobius/M4 with a full-size or pancake NEMA17, the Jetpack with a pancake NEMA17, and Clockwork2 with a pancake NEMA14. If a kit’s extruder motor does not match the toolhead it ships with, something has been substituted and it is worth asking what.

Toolhead wiring and CAN

Decide before ordering whether the machine runs a fat umbilical to the main board or a CAN toolhead board, because the wiring, connectors and main board all change with that choice. Klipper’s CAN bus documentation is the thing to read first, not after the parts arrive. The essentials: every node on the bus must agree on bitrate, the bus wants a 120 ohm termination resistor at each end, and each board is addressed by a UUID you query rather than a name you assign.

CAN is genuinely worth it on an enclosed machine whose loom flexes on every move. It is also a second thing to debug during commissioning, so if this is your first Voron there is no shame in a conventional loom.

Buy the accelerometer with the kit

An ADXL345 or an equivalent supported sensor costs very little next to a kit and it is the difference between a Voron that moves fast and one that prints fast. Many CAN toolhead boards include one, which is the tidiest arrangement. Either way, plan for it at order time, then work through the input shaping setup and tuning guide once the machine runs, and use the Klipper input shaper and CoreXY speed calculator to sanity-check the acceleration and flow numbers that come out of it.

Kit, self-source, or hybrid

A vendor kit buys you one shipment and one point of contact. Check which revision it targets, the printed-part material, the extrusion profile, the bed alloy, and the driver count. Those five answers tell you more than any brand reputation.

Self-sourcing from the Configurator BOM buys total control at the cost of a dozen vendors and the near-certainty that one missing fastener size stalls the build. It is the better route if you already know exactly which components you want.

A kit plus your own printed parts is the common middle path and usually the right one if you own a printer that handles ABS or ASA properly. You control the material and the settings, which are the two variables the documentation cares about most. If you do not own such a printer yet, that constraint deserves its own decision, which the Voron 2.4 versus Bambu Lab P1S comparison works through.

The pre-order checklist

• Generated BOM in hand for the exact model and revision you are building.
• Printed parts in ABS or ASA, never PLA or PETG.
• Extrusion profile confirmed compatible; no V-slot with MGN9 rails.
• Rails the correct size for the model, checked for slop on arrival, graded best-to-worst for X, Y then Z.
• Bed plate alloy named: MIC6, Alpase K100-S, Alca 5, Vista Metals ATP 5 or Alimex 5083. Not 6061, 5052, 5053 or 2024.
• Driver count on the board meets the model: 4, 6 or 7.
• No 0.9 degree steppers on Z or E.
• Extruder motor matches the toolhead it is paired with.
• Toolhead wiring decided: umbilical or CAN, with termination and connectors accounted for.
• Accelerometer included or ordered alongside.
• Grease, tools and consumables budgeted; Voron’s pricing estimates exclude them.