Original Prusa MK3.9S
Original Prusa MK3.9S
Printer Highlights
About Original Prusa MK3.9S
Original Prusa MK3.9S is an open-frame Cartesian FDM 3D printer with a 250 × 210 × 220 mm build volume, up to 200 mm/s print speed, a 300°C hotend, a 120°C heated bed, a prusa nextruder with planetary gearbox (10:1 ratio) extruder, auto bed leveling, and up to 5-color printing support.
General Information of Original Prusa MK3.9S
Printer Name
Original Prusa MK3.9S
Brand
Prusa Research
Series
MK3
Release Date
August 2024
Build Volume & Chassis of Original Prusa MK3.9S
Build Volume
250 x 210 x 220 mm (9.8 x 8.3 x 8.7 in)
Build Volume (X)
250 mm (9.8 in)
Build Volume (Y)
210 mm (8.3 in)
Build Volume (Z)
220 mm (8.7 in)
Enclosed Chamber
No
Frame Type
Dural Aluminum Gantry with CNC Brackets
Machine Size
500 x 550 x 400 mm (19.7 x 21.7 x 15.7 in)
Machine Weight
8.0 kg (17.6 lbs)
Motion System & Kinematics of Original Prusa MK3.9S
Kinematics Type
Cartesian
Motion Axis Type
Smooth Linear Rods with Precision Screws & 1.8° Steppers
Kinematics Layout
Cartesian-XZ-Head Y-Bed High-Speed
Rail System
Hardened Ground Steel Smooth Rods with Misumi Bearings
Dual Z-Axis
Yes
Extruder & Toolhead of Original Prusa MK3.9S
Extruder Type
Prusa Nextruder with Planetary Gearbox (10:1 Ratio)
Toolhead Count
1
Filament Diameter
1.75 mm
Nozzle Diameter
0.4 mm
Nozzle Material
Nextruder Quick-Swap Brass Nozzle
Supported Nozzle Diameters
0.25 mm, 0.4 mm, 0.6 mm, 0.8 mm
Max Nozzle Temp
300°C
Multi-Material Ready
Yes
Max Colors / Materials
5 Colors
Multi-Material System
Original Prusa MMU3 (Optional Add-on, Up to 5 Colors)
Bed & Thermal System of Original Prusa MK3.9S
Build Plate Type
Removable Double-Sided Magnetic Spring Steel PEI Sheet
Heated Bed
Yes
Max Bed Temperature
120°C
Actively Heated Chamber
No
Print Speed & Performance of Original Prusa MK3.9S
Max Print Speed
200 mm/s
Typical Print Speed
140 mm/s
Max Acceleration
4,000 mm/s²
Max Flow Rate
24 mm³/s
Min Layer Height
0.05 mm
Max Layer Height
0.3 mm
Speed Benchy Time
20 min
Automation & Electronics of Original Prusa MK3.9S
Auto Bed Leveling
Yes
Leveling Sensor Type
Loadcell Nextruder Strain Gauge Auto Bed Leveling
Filament Runout Sensor
Yes
Power Loss Recovery
Yes
Input Shaping (Resonance)
Yes
Built-in Camera
No
First Layer LiDAR
No
Part Cooling Fan
High-Static Pressure Centrifugal Blower
Hotend Fan
Silent Axial Fan
Software & Connectivity of Original Prusa MK3.9S
Firmware
Prusa Firmware (xBuddy 32-bit Board)
Compatible Slicers
PrusaSlicer
Connectivity
Wi-Fi, RJ45 Ethernet, USB Type-A, Prusa Connect
Display Screen
3.5-inch Color Graphic LCD Screen
Input Voltage
100-240V AC 50/60Hz
Special Features
Nextruder Planetary Gearbox with Quick-Swap Nozzle, Loadcell Sensor for Always-Perfect First Layer, Native Input Shaping & Pressure Advance
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