Introduction to Stereolithography

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The Form 1+ is a stereolithography 3D printer. Today, we’re going to look at how it works and put it to the test against parts from an extrusion-based machine.

Let’s start by taking a closer look at the printer. When we open up the light-blocking cover, we can see a build platform inside. This metal plate is where the parts are made.

Underneath the build platform is a liquid resin tank. This clear window gives the ultraviolet laser a path to cure the resin.

To start a print, we’ll upload a file, and fill up the resin tank to the indicator line. You can see the laser passing back and forth inside, hardening the liquid plastic.

Now, We’ll take our printout and wash it in rubbing alcohol to get the excess resin off. The flower comes with supports on it, and we’ll snip them off to finish the piece.

Stereolithography is known for producing extreme detail, with layers down to four times finer than human hair.

The Form 1+ let us take advantage of a library of materials, so we made some other parts to show what these resins can do.

A Castable Resin gives jewelers and engineers an inexpensive way to produce metal parts. This Flexible Resin is great for simulating different textures and as we can see, this Tough Resin and can really take a hit.

Now let’s compare how the Form 1+ parts stand up against a filament printer. The stereolithography print comes out nice and smooth, but we can see and feel the ridges on the cup printed with filament.

When we break this sample piece, you can see that filament parts quickly snap along the layer lines,. The SLA process creates a chemical bond, so our prints take much more force.

Today, we took a look at how stereolithography printers work, the types of resins they can print with, and what makes the parts stand out against other desktop machines.

#sla #stereolithography #3dprinting #3dprinter #formlabs

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Fun fact: you just helped a kid here for their engineering test :)

vvasima_

Excellent video! I saw for the first time a video of a Stereolithography printer in action 5 minutes ago, and I was stupefied and thought "it will probably take me a while to figure out how this alien-like manufacturing process is working". This video ousted any ambiguity in less than 2 minutes.

vincentlabrecque

I don’t think it’s quite fast or large-scale enough to take off as much as FDM yet, but the unmatchable quality that it brings will definitely make it the future of 3D printing, especially where detail is essential.

spetsnatzlegion

Good video. Never had any idea that this is one of the way of 3D printing.

mikezulu

Maybe I’m just getting old or something but this shit blew my mind. Lol

Micah__

How do you use this machine, we have at the Makers pace but no one knows how to get it started... help ?

Poetiksound

Are there SLA resins that can withstand submersion in ethanol?

ERGMIAMI

in order to make the flower, the pilars to hold it, would one have to make the pilars in the model right? or it automatically designs a series or holding structures?

jouss

The hammer test wasn’t revealing of the critical function of a carabiner - it’s tensile strength

uoglobe

build height how much? direct casting how many resigns avilable?

SenthilKumar-rlws

im here from my manufacturing class xD

saltypokai

This printer is an absolute disaster for commercial use. We've been using it in our business for 1 year now and have trouble with it every 2 or 3 weeks: tanks not recognized, cartrdiges not recognized, non adherance to the build platform. We also had to have the optical system recalibrateDon't get me wrong: when it prints it does a fantastic job, but this machine has some serious reliability issues... We're going to look for another (proffesional) brand.

marcol