UniZ zSLTV - LCD 3D printer

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Industrial 3D printer with LED-LCD technology that allow to produce large-sized and high-quality resin parts.

UniZ 3D printers have revolutionized the technology of 3D resin printers with a new operation. The base of operation of these 3D resin printer is LED-LCD technology, an element that solidifies the resin layer by layer, a process similar to that of a 3D DLP printer. DLP 3D printers (Digital Light Processing) simultaneously project each layer, solidifying it in a single flash of light, which is emitted from a projector. The other great technology used in 3D resin printers is SLA (StereoLithoGraphy), where a laser traces each layer thanks to the movement of the crystals by which it is reflected. When printing medium / large size pieces, without the need for an ultra-precise finish, DLP technology is more suitable for its greater speed to solidify each layer with a single beam of light. On the other hand, if the finish and geometric precision is the most important, the SLA technology is the most suitable, especially when making several small pieces with much detail simultaneously. In this case the DLP technology presents great detail in the printing of a single piece, but less quality to make several pieces at once by having to distribute the voxels (pixels) in an expanded way by the printing base. At all times we must take into account that these technologies make parts with layer heights and micron precision, quality much higher than that achieved with FDM 3D printers, so when we talk about better and worse finished, we must really keep in mind that We are comparing the most accurate technologies of 3D printing. UniZ printers are faster than other UV resin printers on the market that use DLP or SLA technologies thanks to the operation of LED-LCD with liquid cooling, where the sets of LEDs turn on and off very quickly without compromising the finish and the precision of the pieces. The liquid cooling allows to use the set of LEDs in a more accusative way, which becomes a greater volume of printing and greater speed. This set of features allows large productions of pieces simultaneously with short manufacturing times and good detail, without reaching the spectacular surface finish of the SLA printers. Below is a comparative table between the three technologies:

SLA +++ +
DLP + ++
LED-LCD ++ +++
Image 1: Comparison table

UniZ has two industrial LED-LCD 3D printers that enhance and improve the productivity of professional users, such as technicians who help us create large prototypes, functional parts or high volume final products with a good surface finish:

zSLTV 15

As an evolution of the use of an LCD screen, UniZ has obtained UDP (Uni-Directional Peel) technology, with which a really high printing speed (600 mm/h) is achieved. The zSLTV 15 manufactures the parts continuously, the printing base does not perform the typical back and forth movement of the resin printers, if not, the base ascends constantly. This coupled with its incredible volume of printing (345.6 x 194.4 x 400 mm), make this 3D resin printer is the tool desired by all professional users. The UDP technology must always be accompanied by the resins with UDP denomination to ensure an exceptional surface finish and resolution.

Video 1: zSLTV 15. Source: UniZ

zSLTV 23

The zSLTV 23 is the 3D printer that UniZ has created for professional users who want to manufacture functional objects or reproduce their prototypes at scales close to the actual size thanks to its large manufacturing area. With a print volume of 527 x 296.46 x 740 mm and a resolution in the XY plane of 137 μm, this 3D resin printer is the manufacturing tool that every designer and artist wants to have in their workplace to make prototypes, tools , final pieces and an infinity of other elements regardless of the size of the piece but always maintaining a good surface finish.

UniZ zSLTV 23

Image 2: UniZ zSLTV 23. Source: UniZ

The lamination software of the UniZ 3D printers focuses on providing a service as simple as possible, but with the possibility of configuring a large section of parameters. Between the common ones are the generation of personalized supports, advanced control of several printers of simultaneous form, service of impressesion in the cloud and resolution in the axis Z. In this last parameter the UniZ Software Suite offers something new in the 3D impressesion of resin, the option to choose the print quality in different layers of the piece.

UniZ Software Suite

Image 3: UniZ Software Suite. Source: UniZ

UniZ 3D LCD printers are ideal for professionals users who want to make parts, models and prototypes without worrying about the size and a wide variety of materials and colors. The users who acquire one of these printers will enjoy its use thanks to the ease of handling of the rolling software, of the 3D LED-LCD printer itself and of aids such as the assistant of automatic transfer of the resin from the tank to the bottle and of the self-filling during the manufacture of a piece.

Before each print must pass a plastic card, included with UNIZ 3D printer, the bottom of the tank to verify that there are no solid residues of resin and the sheet tank is not damaged. Never use a metal spatula.

When making an impression in UDP mode, a series of specifications must be considered:

1- UDP printing mode: Due to the unidirectional manufacturing in this way it is not possible to create pieces with the cross section completely solid. Another aspect to take into account is the manufacture of closed sections of great height since they usually present problems of resin accumulation, accumulation that can cause the breakage of the pieces during printing. It is recommended to make models with some vertical release slot.

Vertical release slot

Image 1: Vertical release slot. Source: UniZ

2- Maximum print height in the same place: To prevent overheating of the LCD screen with pieces that have a height greater than 50 mm, it is recommended to tilt the piece at a small angle. This prevents the LCD from constantly working in the same place.

Maximum printing height in the same place

Image 2: Maximum printing height in the same place. Source: UniZ

3- Maximum thickness of the wall: If the thickness of the wall of the piece is greater than 2 mm, the manufacture will reach a point where the resin will not circulate under the piece, producing the failure of the impression.

Maximum thickness of the wall

Image 3: Maximum thickness of the wall. Source: UniZ

4- Minimum wall thickness supported: A thickness of less than 1 mm is not recommended for a wall that is supported on its two lateral faces, as shown in the following image.

Minimum wall thickness supported

Image 4: Minimum wall thickness supported. Source: UniZ

If, after an impression, you do not have plans to make another one within 3 or 4 days, it is advisable to introduce the resin back into the bottle, clean the tank and the circuit. To return the resin to the bottle, simply press the button indicated in the image. Once all the resin has been extracted, the button is pressed to stop the process.

Fill the bottle automatically

Image 5: Fill the bottle automatically

It is important to control that the LED temperature is above 35ºC and never above 40ºC.

LED temperature

Image 6: LED temperature
ModelzSLTV 15zSLTV 23
Fabricant Uniz (California, USA)
Technology LCD
Certificates -
Printer properties
Print volume 345.6 x 194.4 x 400 mm 527.04 x 264.46 x 740 mm
Power of the laser -
Light source -
Screen -
Electronics -
Firmware -
Resin level control Auto
Autolevel -
Webcam -
Print properties
Positioning resolution (XY) 86 µm 137 µm
Positioning resolution (Z) -
Layer height 10, 25, 50, 100, 150, 200, 300 µm
Precision ±30 µm ±40 µm
Max print speed  200 mm/h
600 mm/h (UDP)
200 mm/h
Resin storage temperature -
Operating humidity -
Working environment temperature 18ºC - 28ºC
Software and conectivity
Software -
Compatible files STL, OBJ, AMF, 3MF, UNIZ
Conectivity USB, WiFi, Ethernet
Electrical properties
Input 100-240 VAC, 3A 50/60 Hz, 240W 100-240 VAC, 6A 50/60 Hz, 480W
Output -
Consumption -
Dimesions and weight
Printer dimensions 1350 x 600 x 700 mm 1600 x 850 x 850 mm
Printer weight 100 kg 150 kg
HS Code 8477.5900

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