Prusa Research

Prusa Research Original Prusa SL1S SPEED

MSLA resin printer. Build volume: 127 × 80 × 150 mm.

Assessed from documentation Updated on October 4, 2026

How to recognize it: Check the full model name “Original Prusa SL1S SPEED” on the label or in device information. Suffixes and revisions identify different models; check the source before selecting parts.

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Technical specifications

Manufacturer specifications for the listed configuration. Notes identify accessories, measurement conditions and calculated values.

Technology and structure2

Technology	MSLA
Build area shape	Rectangular

Build area and volume4

Build area X	127 mm
Build area Y	80 mm
Build area Z	150 mm
Build volume	1.524 L Calculated from nominal X × Y × Z dimensions.

Resolution5

Minimum layer thickness	0.01 mm
Maximum layer thickness	0.1 mm
Exposure LCD diagonal	5.96 in
LCD resolution X	2,560 px
LCD resolution Y	1,620 px

Connectivity1

Listed slicers	PrusaSlicer

Dimensions and weight3

Machine width	225 mm
Machine depth	237 mm
Machine height	400 mm

Technical sources: Original Prusa SL1S SPEED — documentazione ufficiale · Original Prusa SL1S SPEED — specifiche tecniche ufficiali

Undocumented specifications (29)

Enclosed as standard: Not documented
Installed toolheads / extruders: Not documented
Chamber heating: Not documented
Maximum chamber temperature: Not documented
Maximum resin heating temperature: Not documented
Advertised maximum vertical speed: Not documented
XY pixel pitch X: Not documented
XY pixel pitch Y: Not documented
UV wavelength: Not documented
Automatic leveling: Not documented
Power loss recovery: Not documented
Camera: Not documented
Air filtration: Not documented
Control display diagonal: Not documented
Control display: Not documented
Connectivity: Not documented
Firmware: Not documented
Internal storage: Not documented
Manufacturer-listed materials: Not documented
Net weight: Not documented
Rated power: Not documented
Power supply: Not documented
Advertised noise: Not documented
Leveling method: Not documented
Light source: Not documented
Release film: Not documented
Automatic resin feeding: Not documented
Resin vat capacity: Not documented
Advertised Z accuracy: Not documented

No published compatibility for this printer.

Related guides

General guides help identify print defects. Follow the manual for your exact model and variant for disassembly, maintenance and calibration.

Failed resin print: model detached from the build plate or stuck to the FEP
How to work out why a resin model doesn't stick to the build plate, stays stuck to the release film or splits between layers, and what to check in order: resin, temperature, leveling, settings, orientation, film.

Official documentation

Manuals and guides published by Prusa Research. Links go to the manufacturer’s site; we consulted them on the date shown.

Support page

Support hub page — English, accessed on October 5, 2026

User manual

User manual (3D Printing Handbook v1.08) — English, accessed on October 5, 2026

Maintenance

SL1/SL1S — maintenance — English, accessed on October 5, 2026
SL1S SPEED — maintenance and spare parts replacement category — English, accessed on October 5, 2026
SL1/SL1S — automatic resin tank cleaning — English, accessed on October 5, 2026

Troubleshooting

SL1/SL1S — print does not appear / resin does not cure — English, accessed on October 5, 2026

Parts replacement

SL1S SPEED — FEP film replacement — English, accessed on October 5, 2026
SL1S SPEED — print display (LCD) replacement — English, accessed on October 5, 2026
SL1S SPEED — UV LED assembly replacement — English, accessed on October 5, 2026
SL1/SL1S — activated carbon filter replacement — English, accessed on October 5, 2026

Firmware and software

SL1/SL1S — firmware update — English, accessed on October 5, 2026

Technical specifications

Official documentation — English, accessed on October 5, 2026
Official technical specifications — English, accessed on October 5, 2026

Sources

Original Prusa SL1S SPEED — official documentation — Prusa Research, accessed on October 5, 2026
Original Prusa SL1S SPEED — official technical specifications — Prusa Research, accessed on October 5, 2026