Prusa SL1S SPEED: Everything You Need to Know

Prusa SL1 Speed

Discover the Original Prusa SL1S SPEED: a high-speed MSLA resin printer offering precision and efficiency, ideal for detailed projects and rapid production.

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Diving into the realm of resin 3D printing, the Original Prusa SL1S SPEED from Prusa Research offers precision and speed that are often sought after by professionals and hobbyists alike. While most of Prusa Research’s reputation is built around their outstanding FFF (Fused Filament Fabrication) printers, the SL1S SPEED is a delightful venture into the MSLA (Masked Stereolithography) technology. MSLA is a subtype of SLA where a light source is masked by an LCD panel to cure photopolymer resin layer by layer.

This blog post will guide you through the features, specifications, and capabilities of the Original Prusa SL1S SPEED, a machine that stands out for its rapid printing and highly detailed output. We’ll compare it with other printers in the Prusa lineup, delve into its specialized spec sheet, and provide insights into the types of resin it can utilize.

About the Printer and Brand

The Czech-based Prusa Research has grown beyond its roots in the FFF world to embrace the high-resolution capabilities of resin printing with the Original Prusa SL1S SPEED. With a build volume of 1.52 liters, it targets a niche that requires exceptional detail and a smooth finish, hallmarks of MSLA technology. A monochrome LCD provides the light source for rapid curing of each layer, while the high-resolution XY axis of 49,6 microns ensures every detail of your design is captured.

The Original Prusa SL1S SPEED, with its compact, enclosed design, provides a controlled environment for resin prints, free from external variables that could affect print quality. The added benefit of an enclosed build chamber also helps in regulating temperature and reducing odors, factors that can be crucial when working with resin.


Printer Comparison

PrinterTechnologyMotion SystemBuild Chamber EnclosureAir FiltrationBuild Volume [mm]
Original Prusa MK4FFFCartesianOpenNo250 x 210 x 220
Original Prusa i3 MK3S+FFFCartesianOpenNo250 x 210 x 210
Original Prusa SL1S SPEEDMSLANAEnclosedNo127 x 80 x 150
Original Prusa MINI+FFFCartesianOpenNo180 x 180 x 180
Original Prusa XLFFFCartesian (CoreXY)OpenNo360 x 360 x 360
TRILAB AzteQ IndustrialFFFDeltaEnclosedNo300 x 400
TRILAB DeltiQ 2 PlusFFFDeltaOpenNo250 x 500
Prusa Pro HT90FFFDeltaEnclosedYes300 x 400

The Original Prusa SL1S SPEED stands apart in the Prusa product line as the company’s premium MSLA 3D printer, boasting a build volume tailored for high detail at speed. It contrasts with the predominantly FFF-based offerings, showcasing Prusa Research’s ability to branch out and also excel in alternative 3D printing technologies.

The Spec Sheet

PrinterOriginal Prusa SL1S SPEED
BrandPrusa Research
CountryCzech Republic
LinkOriginal Prusa SL1S SPEED
Feedstock FormatResin
Build Volume [L]1.52
W [mm]127
D [mm]80
H [mm]150
Layer Height Min [mm]0.025
Layer Height Max [mm]0.15
Build ChamberEnclosed
Actively Heated Build ChamberNo
Air FiltrationNo
Motion SystemNA
Resolution W [Pixel]2560
Resolution D [Pixel]1620
Resolution W [µm]49,6
Resolution D [µm]49,4
Projection TechnologyMonochrome LCD
Wavelength [nm]405
LPU Lifespan [h]2000

Filaments Possible to Print

Given the Original Prusa SL1S SPEED’s technology, we’ll specify resins that are suitable for printing rather than filaments:

  • General-purpose resins
  • Dental resins
  • Castable resins
  • Tough / durable resins
  • High-temperature resins
  • Flexible resins

Filaments Possible but Not Recommended

For the Prusa SL1S SPEED, which uses resin, there aren’t specific materials that are possible but not recommended. However, always ensure that the resin used is compatible with the 405 nm wavelength used by the printer’s light source.


How fast can the Original Prusa SL1S SPEED print?

The Original Prusa SL1S SPEED can significantly reduce the printing time compared to traditional SLA printers, thanks to its monochrome LCD and high-powered 405 nm light source.

Does the Original Prusa SL1S SPEED have an open or enclosed build chamber?

This printer comes with an enclosed build chamber which optimizes the printing environment for resin-based prints.

What is the lifespan of the light processing unit (LPU) in the SL1S SPEED?

The LPU of the SL1S SPEED has a lifespan of approximately 2000 hours, offering prolonged periods of high-performance printing.

Can I use third-party resins with the Original Prusa SL1S SPEED?

Yes, you can use third-party resins with the SL1S SPEED, but they should be compatible with the 405 nm curing wavelength.

What is the maximum build volume for the Original Prusa SL1S SPEED?

The SL1S SPEED has a maximum build volume of 127 x 80 x 150 mm, favoring high detail in relatively compact prints.

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