Original Prusa MK4 (Open-Source Czech-made FDM・2023年)（プルサエムケーフォー）
2023年Q1 Prusa Research (チェコ・Prague拠点・2012年Josef Prusa創業・Open-Source Hardware 3D Printer老舗) 発売のOriginal Prusa MK4・Open-Source Hardware FDM 3D Printer Flagship・250×210×220mm Build Volume + 200mm/s高速 + Nextruder (Quick-swap Nozzle) + Auto Bed Mesh (Strain Gauge Loadcell) + 32-bit Buddy Board + open-source firmware (PrusaSlicer)・$1,099 (Kit) / $1,299 (Assembled) ・Bambu Lab P1S直接競合のOpen-Source / Czech-made信頼性志向Mainstream FDM 3D Printer。
概要
Original Prusa MK4 は、2023年3月にチェコ共和国・Prague拠点のPrusa Research (2012年Josef Prusa創業・Open-Source Hardware 3D Printer業界老舗・累計売上$500M+) が発売したOpen-Source Hardware FDM 3D Printer Flagship現行モデル。前世代Original Prusa MK3 (2018年・MK3S+ 2020年改良) の正統後継機・Bambu Lab P1S ($699) 直接競合のOpen-Source / Czech-made信頼性志向Mainstream FDM 3D Printer。Open-Source Hardware (全hardware design / firmware / slicer PrusaSlicer GPL3 license公開) + Czech-made (Prague factory自社manufacturing・Quality control厳格 + EU labor cost) + Long-term support (MK3 2018-2024年6年間 Replacement parts availability継続・MK4も2029-2030年target長期サポート) で 3-5年Long-term hobbyist + Modification freedom志向 user に絶大支持・3D printer community先駆者 / influencer brand。250×210×220mm Build Volume (Bambu Lab P1S 256mm vs 微小・少し小) + 200mm/s高速 (MK3 80mm/s vs 2.5倍高速・Klipper-grade input shaper採用) + Nextruder (Quick-swap Nozzle・1分以内 swap可能・Bondtech-supplied filament drive) + Auto Bed Mesh (Strain Gauge Loadcell・Bed leveling probe不要・printer base direct sensing) + 32-bit Buddy Board (LPC1769 ARM Cortex-M3 + Ethernet RJ45 + Wi-Fi USB dongle対応) + open-source firmware (PrusaSlicer + open Marlin fork) ・$1,099 (Kit・3-4時間 assembly) / $1,299 (Assembled・即用) ・Open-Source signature。
主な特徴・仕組み
- Build Volume: 250×210×220mm (Bambu Lab P1S 256mm vs 微小)
- Speed: 200mm/s (Acceleration 8000 mm/s²・MK3 80mm/s vs 2.5倍)
- Nextruder: Quick-swap Nozzle (1分以内・Bondtech filament drive・Direct-drive)
- Auto Bed Mesh: Strain Gauge Loadcell (Bed leveling probe不要・Printer base direct sensing)
- Hotend Temp: 290°C max (Bambu P1S 300°C / X1 Carbon 300°C 比少劣勢)
- Layer Resolution: 0.05-0.3mm
- Mainboard: 32-bit Buddy Board (LPC1769 ARM Cortex-M3 + Ethernet RJ45 + USB host port)
- Firmware: open-source (Marlin fork) ・User-customizable
- Slicer: PrusaSlicer (open-source GPL3・3D printing industry defacto standard)
- Wi-Fi: USB dongle別売 ($30追加・default Ethernet + USB)
- MMU3 Multi-color (別売): $329別売 + 5色 Multi-material Upgrade
- Manufacturing: Prague Czech-made (自社factory・Quality control厳格)
- Warranty: 2年保証 + Replacement parts 5-7年availability target
- Price: $1,099 (Kit・3-4時間 self assembly) / $1,299 (Assembled・即用) / $1,629 (MK4S + MMU3 Bundle)
スペック比較表
| Mainstream 3D Printer (2023-2024) | Build Volume | Speed | Multi-color | Open-Source | Price |
|---|---|---|---|---|---|
| Prusa MK4 | 250×210×220 | 200mm/s | △ (MMU3別売$329) | ◎ Full Open-Source | $1,099-$1,299 |
| Bambu Lab P1S | 256×256×256 | 256mm/s | ◎ AMS Lite | × Closed firmware | $699-$899 |
| Bambu Lab X1 Carbon | 256×256×256 | 500mm/s | ◎ AMS + Lidar | × | $1,449 |
| Creality K1 | 220×220×250 | 600mm/s | × | △ | $559 |
| Voron 2.4 (DIY) | 350×350×350 | 800mm/s | × | ◎ DIY Build | $1,500-$2,500 DIY |
具体例・対応製品
- Original Prusa MK4 Kit: $1,099・3-4時間 self-assembly + Quality time
- Original Prusa MK4 Assembled: $1,299・即用・$200 assembly premium
- Original Prusa MK4S (2024年Refresh): $1,099-$1,299・改良heatsink + Wi-Fi standard ON
- MMU3 Multi-Material Upgrade: $329別売・5色 Multi-material printing
- Original Prusa XL (上位モデル・2023年): $1,999-$3,499・360mm Large Volume + Tool Changer 5
自作PCでの選び方・注意点
Original Prusa MK4 は「Open-Source Hardware Hobbyist (firmware mod / hardware modification freedom)」「Czech-made信頼性 + Long-term support (5-7年Replacement parts availability)」「PrusaSlicer industry defacto standardで深い workflow統合」用途の本命Open-Source FDM 3D Printer。Bambu Lab P1S ($699・closed firmware) の Cost-Performance + Convenience に対し、Open-Source firmware + Modification freedom + Czech EU-made信頼性 + 3D printer community中心brand legacy で Hobbyist / Maker / Engineering user に強い支持。Nextruder の Quick-swap Nozzle (1分以内・Bambu Lab P1S 5-10分 swap比) + Auto Bed Mesh Loadcell (Bambu Lidar無の場合 manual leveling必要) は Daily-use Convenience でAdvanced。一方Speed 200mm/s (Bambu P1S 256mm/s / Creality K1 600mm/s 比劣勢) + Multi-color MMU3別売 $329 (Bambu AMS Lite $349の場合 P1S Combo $899が お得) で Speed / Multi-color重視 user は Bambu選択肢。Kit $1,099は 3-4時間self-assembly time investment (Bambu P1S即用 vs trade-off) ・User assembly experience を Hobby に含む user は Kit recommended ($200 saving + 学習機会)。
関連用語との違い
- vs Bambu Lab P1S: PrusaはOpen-Source + Czech-made + Long-term support・Bambuは Cost-Performance + 速度 + Multi-color AMS
- vs Prusa MK3 (前世代): MK4は速度2.5倍 (80→200mm/s) + Nextruder Quick-swap + Loadcell Bed Mesh + 32-bit Buddy Board
- vs Prusa XL: MK4は$1,099 + 250mm Mainstream・XLは$1,999+ + 360mm Large + Tool Changer 5 + Prosumer
よくある質問（FAQ）
Q1: Kit vs Assembled どちらを選ぶ？ A: Self-assembly hobbyist (3-4時間 + 学習経験を hobby part として楽しめる) → Kit $1,099・Time-constrained user (即用・Quality-controlled factory assembly preferred) → Assembled $1,299。$200 saving for Kit。
Q2: Open-Source firmware の実用メリットは？ A: Custom firmware modification可能 (例: Klipper上書き install + Custom acceleration config)・User community fork (Prusa Marlin fork) で feature commit・Vendor lock-in なしのfuture-proof運用 + Long-term Mods possibility (Replacement parts EOL後も Custom hardware extension)。
Q3: Prusa MK4S とは？ A: 2024年Q3 MK4 Refresh・改良heatsink + Wi-Fi standard ON (USB dongle不要) + その他minor improvements・$1,099-$1,299 同価格でMK4 buyer は無料upgrade対象。MK4 = MK4S concept で 2023年-2024年継続販売。
まとめ
Original Prusa MK4 = 2023年Prusa Research発売のOpen-Source Hardware Czech-made FDM 3D Printer。250mm + 200mm/s + Nextruder + Auto Bed Mesh Loadcell + open-source firmware (Marlin fork) + PrusaSlicer + $1,099-$1,299・Open-Source / Czech-made信頼性 + 3-5年Long-term support志向のMainstream Hobbyist本命FDM 3D Printer。