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Prusa CORE One L – Critical Infrastructure Edition

Industrial 3D printer for critical infrastructure where data security is just as important as print quality.

Prusa CORE One L – Critical Infrastructure Edition is based on the professional large-format printer CORE One L, but is specially adapted for defense, aerospace and other highly secured operations. It offers a fully air‑gapped solution, all Wi‑Fi hardware removed, no internal camera, and a certified encrypted USB drive for data transfer – all with the goal of keeping sensitive models strictly offline and under your full control.

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Key features

• Large print volume 300 × 300 × 330 mm
  For large functional parts, jigs and prototypes in one piece, as well as for serial production of multiple parts at once.
• Critical Infrastructure Edition security
  • Custom 32-bit xBuddy board without Wi‑Fi slot and related circuitry
  • No internal camera included
  • Certified, encrypted USB drive for secure offline transfer of print data
  • Suitable for defense industry, government, critical infrastructure and operations with strict security policies.
• CoreXY kinematics and exoskeleton construction
  A rigid steel exoskeleton, precise 0.9° stepper motors on the X/Y axes and high-quality linear rails ensure excellent dimensional accuracy and repeatability confirmed by CT measurements.
• AC convection heated bed and actively heated chamber
  Milled AC aluminum plate with even heat distribution and a pair of fans that create convection heating of the chamber up to 60 °C. Enables reliable printing of PC, ASA, PA (nylon) and other technical materials without warping and cracking.
• Nextruder with high-flow nozzle
  • Direct Drive with a 10:1 planetary gearbox for precise material dosing
  • High-flow brass Prusa Nozzle CHT 0.4 mm installed as standard + durable 0.4mm abrasive nozzle included
  • Quick-change nozzle system for fast switching between materials and diameters.
• Optimized for high speed without loss of strength
  Thanks to CoreXY kinematics, Input Shaper and internally tuned profiles, the printer prints fast but with an emphasis on strength, layer adhesion and industrial usability of parts, not just record speeds.
• Dual feeding mode, easy printing of flexible filaments
  A physical switch that bypasses the primary filament sensor and opens a wider path for flexible materials (TPU, TPE, etc.). A second sensor in the print head ensures detection of filament runout.
• Fully automatic first-layer calibration
  The Load Cell sensor in combination with Mesh Bed Leveling takes care of automatic bed tramming and first layer adjustment – quick commissioning, minimal operator error.
• Designed for 24/7 industrial operation
  Experience from more than 600–700 printers in the company farm has been incorporated into the design for maximum uptime, easy maintenance and long service life. No glued parts, everything disassemblable with standard tools, guaranteed availability of spare parts.
• Manufactured and assembled in the EU and USA, audited quality
  Electronics including the custom mainboard are produced on the in-house PCB production line in Prague, final assembly takes place in Prague (EU) and Delaware (USA). Production is certified according to ISO 9001:2015, 14001:2015 and 45001:2018.
• No vendor lock‑in, open ecosystem
  No closed “walled garden”. You can use any filament (PLA, PETG, PC, ASA, PA etc.) from any manufacturer and any slicer – everything fully under your control.

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Technical parameters

Dimensions and mechanics

Parameter	Value
Print volume	300 × 300 × 330 mm
Printer dimensions (W × D × H)	469 × 521 × 635 mm
Printer weight	approx. 21,9 kg
Kinematics	CoreXY, exoskeleton steel construction
Filament	1,75 mm
Layer height	0,05–0,30 mm

Electronics and safety

Parameter	Value
Mainboard	Custom 32-bit xBuddy electronics with STM32, without Wi‑Fi slot and related circuitry
Motor drivers	Trinamic 2130
Stepper motors	Precise 0,9° motors on X/Y axes (minimization of VFA artifacts)
Bed power supply	AC convection heatbed, multi-level HW protection (leakage current monitoring, redundant relay + TRIAC control, shielded cable)

Extruder and hotend

Parameter	Value
Extruder	Nextruder, Direct Drive, compatible with E3D V6 (with adapter)
Gearing	10:1 planetary gearbox
Filament path	Aluminum heatsink, all-metal hotend
Nozzle	High-flow brass Prusa Nozzle CHT 0,4 mm + durable 0,4mm abrasive nozzle included
Print cooling	High-performance blower fan, 360° cooling
Quick-change nozzle system	Yes

Temperatures and chamber

Parameter	Value
Max. nozzle temperature	290 °C
Max. bed temperature	120 °C
Max. chamber temperature	60 °C

Control and connectivity

Parameter	Value
Display	3,5" color graphic LCD, touch control
Print control	USB flash drive, LAN, Prusa Connect, Prusa App mobile application (if connectivity is enabled)
Ethernet	Yes
Additional connectivity	NFC receiver
Firmware update	USB drive, Prusa Connect, mobile application

For the Critical Infrastructure Edition, emphasis is placed on fully offline use; Wi‑Fi hardware is physically removed, the camera is not included and the primary medium remains the encrypted USB drive.

Sensors and functions

Parameter	Value
Filament sensors	2× filament sensor
Load Cell sensor	Yes (for automatic first layer and calibration)
Thermistors	5× high-precision Semitec thermistors
Fan monitoring	Yes
Door sensor	Yes
Input Shaper / Phase Stepping	Yes / Yes
Accelerometer	Yes, integrated

Printing and materials

Parameter	Value
Print surface	Magnetic heated bed with replaceable flexible PEI sheets
First layer calibration	Fully automatic (Load Cell)
Bed calibration	Automatic, Mesh Bed Leveling (print area only)
Supported materials (without filtration)	PLA, PETG, Flex, PVA, PC, PP, CPE, PVB
Supported materials (with optional filtration)	ABS, ASA, HIPS, PA (nylon) and other technical materials
MMU3 support	Yes (MMU3 available from 1/2026)
Advanced Filtration System	Optional accessory

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Security and deployment in critical infrastructure

Critical Infrastructure Edition is designed to meet the requirements of industries where cybersecurity and intellectual property protection are key:

• Full control over data – no mandatory cloud registration, no forced online updates.
• Air‑gapped architecture – printing is carried out purely from local media (encrypted USB drive); Wi‑Fi components are physically removed from the board.
• Transparent origin – electronics are manufactured and assembled in the EU/USA, including in-house PCB lines.
• Open-source firmware – possibility of independent code audit and adaptation to the organization’s security policies.

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Box contents (basic set)

• 3D printer Prusa CORE One L – Critical Infrastructure Edition (fully assembled)
• AC heated bed with magnetic system
• High-flow brass CHT 0.4 mm nozzle (installed)
• Abrasion-resistant 0.4 mm nozzle (included)
• Certified encrypted USB drive
• Power cable (regional variant)
• Basic accessories for maintenance and calibration
• Printed manual (EN) + access to Prusa Academy – online course for operator training

(The exact contents may vary slightly by region.)

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Use cases and target customers

• Defense and security industry – production of assembly jigs, covers, holders, test fixtures, mock-ups and functional components.
• Aerospace and automotive sectors – prototypes, low-volume production of parts, jigs and measurement fixtures.
• Energy and critical infrastructure – spare parts, maintenance fixtures, custom brackets and consoles.
• R&D and development centers – rapid development and iteration of parts without the risk of sensitive CAD data leakage.

Thanks to the large print volume, enclosed and heated chamber and a carefully designed security ecosystem, Prusa CORE One L – Critical Infrastructure Edition is the ideal choice wherever the need for top print quality meets maximum data protection.

Key features:

• Special Critical Infrastructure Edition with modified mainboard without Wi‑Fi and without internal camera for maximum data security
• Large print volume 300 × 300 × 330 mm for large-format parts and serial printing of multiple pieces
• AC convection heated bed with actively heated chamber up to 60 °C for reliable printing of technical materials
• Precise CoreXY mechanics with 0.9° motors and steel exoskeleton for top-class dimensional accuracy
• Nextruder with high-flow CHT nozzle, direct drive and quick-change nozzle system
• Fully automatic first-layer calibration using Load Cell sensor and Mesh Bed Leveling
• Optimized profiles for high-speed printing without compromising part strength and industrial usability
• Designed for 24/7 industrial operation, easy service, guaranteed availability of spare parts and long service life
• Open ecosystem without vendor lock‑in: any materials and slicers, the option of fully offline operation