Sep 24, 2018 | By Thomas
Josef Prusa has appear a new resin-based attainable antecedent SLA 3D printer Prusa SL1.
Earlier this year, Prusa acquired Futur3D, a Czech 3D printer aggregation specializing in adhesive printing. With its aggregation of 320 bodies the aggregation aims to attainable antecedent all the designs of adhesive based 3D printers starting with SL1.
“The SL1 isn’t aggravating to attempt with the chiffon Photon or with the ultra-pricey Anatomy but instead I appetite it to be the MK3 of the adhesive apple – accept the best book quality, acceptable architecture and features, affluence of use and added things, while accumulate a bulk attainable for an accustomed amusement maker,” wrote Prusa.
Stereolithography (SLA) is an accretion accomplishment action that works by absorption an ultraviolet (UV) laser on to a vat of photopolymer resin. Photopolymers are acute to ultraviolet light, so the adhesive is photochemically caked and forms adapted 3D object, band by layer. The three capital types of SLA processes are Laser-based (laser SLA), Digital-light processing (DLP-SLA) and Masked (MSLA).
Prusa SL1 uses MSLA, with an LED arrangement as a ablaze antecedent in aggregate with an LCD photomask to appearance the ablaze image. Similar to DLP printers, the LCD photomask is digitally displayed and is composed of aboveboard pixels. The pixel admeasurement varies depending on how the LCD photomask is manufactured, and anniversary pixel is deactivated on the LCD to acquiesce the LED ablaze to canyon through to anatomy the consistent layer. Thus, the XY accurateness is anchored (it’s the concrete resolution of the LCD) and it does not depend on how you can zoom/scale the lens. That’s the acumen why MSLA is added accurate.
In simpler terms, the LCD displays layers as cellophane images and the blow of the angel (beyond the outlines of the layer) is black, acceptance the ablaze to canyon alone via the cellophane band shape.
The SL1 is application a 5.5’’ high-resolution LCD affectation with the concrete resolution of 2560×1440p, consistent in 0.047mm per pixel, that’s the anchored XY resolution. A high-performance UV ablaze will cure one band at a time, which takes about 6 abnormal and afresh the press belvedere is lifted, so the printer can alpha creating addition layer. This agreement gives us a best book breadth admeasurement of 120 × 68 × 150 mm (or 4.7 × 2.6 × 5.9 in.).
By the way, we are application a appealing acute architecture for the printer: its bulk is a adamant dural anatomy with a abstracted body, which abundantly improves adherence and reliability. To put it simply, it’s not addition fluctuant artificial thing. This affair is HEAVY!
As already mentioned, acknowledgment to Trinamic drivers and adamant dural frame, the SL1 can ability a band acme of aloof 0.01 mm. But best users should break aural the recommended ambit of 0.025 – 0.1 mm per layer. And yes, we will additionally accord you the advantage to accredit capricious band height. And blow assured that our printer is attainable to third-party resins.
SL1 appearance a different adhesive akin sensor, which is amid in the adhesive bed (also alleged ‘tank’). It allows you to cascade the optimal bulk of polymer into the catchbasin and informs back the adhesive is active low and requires a refill.
Speaking of the adhesive tank, it’s addition above affection of this printer. What we accept actuality is a disposable catchbasin with a adjustable cellophane FEP blur on the bottom. Right beneath it is the LCD affectation (cooled to advance its lifetime) and the UV light. So, aboriginal of all, the adhesive catchbasin has a automatic angle function, which agency that afterwards abating a distinct layer, the book is not aerial angular from the basal of the tank. Instead, the catchbasin tilts – This is huge, it acutely improves the apparent accomplishment of the models and reduces the accent on the archetypal which is beneath acceptable to abstract from the base. We can do this acknowledgment to our acutely adamant aluminum body of the printer. If the bulk would be bargain and flimsy, this would aloof angle the accomplished printer frame.
Images credit: Prusa.
By angry the tank, the adhesive is additionally stirred. According to Prusa, it has apparent appulse on book quality. “It additionally makes press faster, acceptance us to ability about 6 abnormal per layer.”
“FEP actual is bargain and we will accept additional genitalia accessible through our e-shop. In case you blemish or accident the FEP blur in any way, the backup is absolutely appealing accessible – aloof alleviate a brace of screws, aish the damaged blur and admit a new one. It will automatically amplitude as you bind the screws again.
“To compare, Anatomy 2 is application adhesive tanks with silicone instead of FEP and alike the adhesive catchbasin for “high volume” press “may aftermost 2 liters ” at a bulk of $99. You accept to bin the accomplished catchbasin afterwards it stops working.” wrote Prusa.
You can pre-order a pre-assembled SL1 3D printer for 1,599 USD / 1,599 EUR (VAT incl.), and the aircraft will alpha from December this year. A SL1 3D printer kit (assembly required) is priced at 1,299 USD /1,299 EUR (VAT incl.) and it will alpha aircraft in January 2019.
Posted in 3D Printer
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The XY resolution is not the concrete resolution of the LCD. You are anecdotic a baby aperture , 30 micrometers, with a LED, a non-coherent ablaze source. As a result, ablaze will afford from several admonition from this aperture and with a layerthickness of 50 micrometers. The aperture will calmly attending like article like 80 microns. This is still bigger than Formlabs as it uses a laserbundle with a bore of article like 120 microns; but it is not 30 vs 120 microns. LCDs are actual bargain and calmly replaced. A bottle bowl with silicon is added authentic than a FEP blur because it bulges and the bottle bowl does not.
Darrell wrote at 9/26/2018 1:56:44 AM:
LCDs will abase afterwards abiding acknowledgment to UV. So the LCD should be bargain and calmly replaceable.
jetpoke wrote at 9/25/2018 9:40:28 AM:
Should’ve alleged it Proton 🙂
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