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Model LOTMAXX SHARK V2

Laser Rated Power

1600mw

Molding technology FDM

Nozzle diameter standard 0.4mm, can be changed to

0.3mm and 0.2mm

Number of nozzle 1

Nozzle temperature 260℃ (MAX)

Hot bed temperature 100℃ (MAX)

Print volume 235*235*265mm

Product size 443*466*488mm

Build plate size 250*250mm

Product Weight 8.4kg

Printing accuracy ±0.1mm

Layer thickness 0.1-0.4mm

Documents supported STL、Obj、amf

Slicing software LOTMAXX,Cura,Repetier-Host,Simplyfy3D

Operating Voltage 100-120V / 200-240V

Machine power 290W

Filament diameter 1.75mm

Display 3.5-inch removable resistive Touch Screen

Display spring wire plug HDMI

Laser engraving

Equipped

Bi-color printing Equipped

Automatic leveling-gravity sensor (at the hot bed plate) Equipped

Rapid cooling Supported

Resume printing Supported

All-plastic extrusion mechanism Supported

Language 8 languages

Silent drive Supported

Number of extruders 2

Printing material PLA,ABS,TPU,Wood,copper-bearing,Gradient,etc.

The Lotmaxx Shark V2, selling for a retail price of $499, stands out among the competition by not only offering dual extruders for 3D printing multiple colors or materials, but also providing a laser engraver module that ships with the printer and can be installed in under 5 minutes. The build volume of the Shark is slightly larger than other printers in this price range (235 x 235 x 265mm) and the 290W power supply heats both the extruder and heated bed rapidly. The included 1600mW laser engraver works well when engraving wood, but the frustratingly slow speed will likely turn off most users.

Printing with dual extruders can be a challenge due to the enhanced level of calibration required to ensure the offset between nozzles is correct. Lotmaxx has solved this problem by having a pair of extruders both feed into a single nozzle; allowing the printer to swap between material colors during a print without needing a second hot end assembly. While this is a novel idea in theory, in practice it made models that suffered from color bleed from the material purging process. Also note that both filaments must be of the same type so you can’t use PVA, which dissolves in water, for your support material and PLA for the rest.

The lofty goals of the Shark V2 and the somewhat disappointing reality of the machine keep this printer from being one of the best 3D printers, but it’s still an excellent deal for anyone interested in printing with two extruders or using a low-cost laser engraver.

The Lotmaxx Shark V2 includes all the accessories you would expect from a printer in this price range including a metal scraper, a set of Allen keys, a screwdriver, a microSD card and USB reader, a USB cable, and a pair of 200g spools of filament. The Shark V2 includes the second extruder as well as the laser engraver module in two separate boxes, along with a set of tinted safety goggles to wear while the laser engraver is running.

The Lotmaxx Shark V2 is somewhere between a fully assembled printer and a DIY kit and took me about 20 minutes to completely put together. The frame has already been wired, and there are only a few electrical connections to make on the printer to get it up and running. This is a much faster process than assembling a DIY kit printer like the Voxelab Aquila X2, which takes about an hour to fully assemble from a box of parts.

The Shark V2 is a dual extruder 3D printer, which means it is capable of printing two materials simultaneously by using a pair of extruder mechanisms to feed material to the hot end. The first extruder is mounted to the X-axis gantry, which is the typical mounting point for an extruder and comes pre-installed on the Shark V2. The second extruder is included in a box that contains the extruder motor, extruder module, filament run-out sensor, and a cable to connect to the front of the printer.

The second extruder attaches to the top of the frame, and feeds filament down the dual-input hot end. Unfortunately, the PTFE tube included with the printer was too short to connect from the top extruder to the hot end coupler, which restricts the movement of the extruder module. This is an easy problem to solve (I had an extra PTFE tube that was long enough to use), but it’s a clear quality issue to ship the machine with an improperly-cut tube. I reached out to Lotmaxx to request a replacement, and they were able to provide a replacement that was long enough to use with the second extruder.

The Lotmaxx Shark V2 stands out from almost every other i3-frame 3D printer I’ve ever seen thanks to the cool grey aluminum extrusions used for the frame, as opposed to the much more common black aluminum extrusions found on printer like the Elegoo Neptune 2. It’s a unique look, and it also fits with the ‘Shark’ motif of the printer.

The hot end module on the Shark V2 is another unique design; featuring dual part cooling fans on both sides of the hot end as well as a heatbreak cooling fan mounted to the front. These fans are low-noise, an ideal match for the TMC2208 silent stepper drivers which allow the Shark V2 to print at a comfortable volume that will be acceptable in most environments.

The hot end itself has two filament inputs and a single output nozzle, and uses only one heating element and thermistor. This unique nozzle allows for multi-color printing using two extruders without requiring a separate nozzle assembly, which cuts down dramatically on the amount of calibration required between nozzles.

The belts on the X and Y axis on the Shark V2 are adjustable, but this adjustment requires loosening a few bolts, putting tension on the idler bracket, and then tightening everything back up. This is a difficult process that feels like it would be easier with three hands, and adding a tensioning knob to each axis like the ones found on the Voxelab Aquila X2 would make this a much easier process. These adjustments typically don’t need to be done often, but the Shark V2 arrived with the Y belt almost entirely slack due to the bracket coming loose during shipping.

The 4.3-inch color touchscreen LCD used by the Lotmaxx Shark V2 as an interface is a unique one that seems like it would be more at home on a piece of commercial office equipment than a 3D printer. The LCD is housed in a plastic enclosure that can be removed from the printer without interrupting the prints. The display sits on an angled bracket on the right side of the Shark V2 and features a clean (if not somewhat underwhelming) user interface.

The LCD is connected to the Shark V2 via a curly cord with an RJ-11 terminal, similar to what you would find on a landline telephone. At first, I didn’t understand the benefit of having a removable LCD, but after holding it in my right hand while I make adjustments to the printer with my left I can see that it’s going to be hard to go back to using a fixed display. In the grand scheme of this machine, it’s just another feature that makes the Shark V2 stand out from other FDM 3D printers in this price range.