Kingroon KP3S 3D Printer Review


Product Overview

Kingroon KP3S 3D Printer Review

The Kingroon kp3s is an economical, small 3D printer for newbies in the 3D printing space. It has cool functions such as the direct drive extruder and linear rails. It costs 50% less than the Prusa MINI+ 3D Printer and has many of the same capabilities. Let’s see what’s beneath the skin.


Packing and Shipping of KP3S

For roughly $158, the Kingroon KP3S was dispatched from an EU warehouse of AliExpress. The printer is packaged in a sturdy cardboard box with a good amount of padding material all around.


Bundled Accessories

Kingroon KP3S 3D Printer Review

Besides, the fully assembled printer, the Kingroon KP3S comes with the following accessories:

  • Instruction Manual
  • Sample of PLA filament
  • USB connecting cable
  • Hex type wrenches
  • Assembly screws (few spares too)
  • 16GB Sandisk Micro SD memory card and SD Card Reader
  • Extra four nozzles
  • Extra thermistor
  • A PTFE tube
  • Pliers for cutting
Kingrron KP3S 3d Printer
Image: Kingroon KP3S 3D Printer

Kingroon KP3S Assembling

The Kingroon KP3S is simple to put together. It’s pretty much done once you mount the Z axis to the base with two screws. 

There isn’t much to do to get the printer ready to print other than levelling the bed. Simply ensure that the Z rollers are securely fastened. They can develop flat areas and cause printing troubles if they are too tight.


Technical Specifications

Kingroon KP3S 3D Printer Review

Following are the general specifications of the KP2S:

  • Make and Model : KP3S
  • Build Area : 180mm x 180mm x 180mm
  • Printer Size : 280mm x 285mm x 370mm
  • Printer Technology : FDM
  • Number of Nozzles : 1
  • Print Accuracy : 0.05-0.3mm
  • Nozzle size : 0.4mm
  • Filament Diameter : 1.75mm
  • Filament Type : ABS, PLA, TPU, and Wood
  • Temperature for Nozzle : 260℃ maximum
  • Temperature of Hot bed : 110℃ maximum
  • Print File : OBJ, STL, and Afm
  • Connectivity : TF memory card and USB cable
  • Software Application : Slicer, Cura, and Repetier-Host
  • Operating systems : Mac OS, Windows, and Linux
  • Display language : EN/ES/CN/RU/FR/IT
  • Moving Speed : 00mm/s
  • Print Speed : 100mm/s maximum
  • Resume Print on power out : Yes
  • Upgrade Filament Motor? : Yes
  • Auto Leveling : 3D Touch with Upgrade
  • Machine Power : 240W
  • Power voltage rating : 220V-50Hz 110V-60Hz
  • Power Output : 24V/15A/360W
  • Weight : 6kg or 13.22 lbs.


Kingroon KP3S 3D Printer Review

a. Construction Space of 180mm x 180mm x 180mm

While the KP3S is quite small in size, its build volume is very generous. For many makers, this is sufficient, and to be honest, as they rarely print larger models.

b. X-Y Axis Linear Rails

The addition of linear rails should give the printer better accurate motions. This will have the KP3S print faster, but the weight of the direct drive extruder and eight can still hold it back.

The user won’t be able to put too much pressure on this printer without affecting the quality of print. For a full kit, there should have been a third Z-Axis linear rail, yet the standard wheels are adequate.

Potential purchasers would almost certainly spend an extra ten dollars for all axes linear rails.

c. 32-bit Mainboard plus TMC2225 drivers

The 32-bit mainboard, which uses TMC2225 drivers, is another excellent add-on to the Kingroon KP3S. It contains replaceable stepper drivers that are quickly replaceable, if one breaks in future.

Yet, the power connector is the board’s worst flaw. The heatbed on this printer is the most power consuming part. The barrel connector potentially cannot sustain heavy power draw.

Adding a mosfet to power the heatbed is the best method to rectify this problem and ensure that the board is not damaged. This may necessitate some changes, but it will ensure that the board has a considerably longer life.  This will certainly be the result of reducing the stress on the barrel connector.

d. Extruder of Direct Drive Type

The metallic extruder on the Kingroon KP3S of direct drive type is made up of a standard NEMA17 stepper motor. A lot like the extruders used on printers from Creality.

The extruder not having gears makes it not as quiet as precise as a BMG, but it’s good enough for decent quality prints.

One may upgrade to a BMG Wind if interested in customizing the printer, resulting in a lighter direct drive configuration.

When printing using flexible filaments like the TPU, makers can derive higher performance from the printer.  As also more precise extrusions.

e. Hotend lined with PTFE and noisy fans

An unusual hotend with a MK8 thread linking it to the metal extruder directly, is found in the KP3S. In a comparable heatblock, it employs V6 nozzles. 

A V6-style heatsink is placed to cool the heat break. There is also a noisy 3010 fan to cool it by blowing air. Regrettably, this fan is really loud. It’s the loudest heatbreak fan found on most 3D printers. The fan used for cooling the printer parts is equally noisy.

This is not an ideal fan for cooling such a compact printer, and certainly incapable of driving enough air over the models getting printed.

When not printing fast, this may not make much difference. Yet, with the addition of a radial fan will facilitate far better overhangs, easily remove, and less pressure on your mind.

f. Power Supply configuration

Though the Kingroon KP3S is a tiny machine, the power supply requires some extra space. This is a standard 360W 24V unbranded power supply found in other low-cost 3D printers.

The fan is thermally regulated, so it turns on and off as needed. A “power brick” like the ones that comes with laptops would have helped, but it would have likely increased the price.

Overall, it’s quite decent as the spool holder can be positioned on the power supply top. When one needs a place to store the filament spool, the space savings from a conventional power supply is not much.

The available spool holder isn’t spectacular, but it gets the job done. 

g. Detachable Magnetic Print Frame

The magnetic detachable print surface is another intriguing feature of the Kingroon KP3S. It’s the same one that came with Creality Ender 3, which is much older.

Prints adhere well to it, and one can easily peel them away from the print surface. The main fear is that it may need replacing quite often.

Some filaments have a tendency to clog on the magnetic print frame, causing damage.

If this happens, a replacement costs roughly $13, but for an extra $3, one can get a much better PEI Spring Steel Sheet.

h. Touchscreen with 2.8 Inch Display

A 2.5 inch color touchscreen for effective control of the printer is located on the top of the printer to its right. It’s beautiful and responsive, with a decent layout, and there aren’t many flaws.

It would have been wonderful if it was a little brighter, but it works fine in a less bright room.

Leveling of the bed can be manually done with a guided menu option. This allows for with a single touch, moving the hotend to many corners of the bed. For novices, this is quite useful.

When printing, the Filament button holds the print, gets the hotend home on the X axis, and lets users replace the filament.


Kingroom KP3S Vs Prusa Mini

Though the Kingroon KP3S may be better than the Prusa Mini, it is a decent alternative to tinker around.

a. Build volume Not Different

There is striking similarity between the Kingroon KP3S and the Prusa Mini in construction space offered.

It also includes a removable print area, but not like the PEI sheets the Mini has, it’s only a sticky magnetic part.

Take into account that this magnetic print area may have a shorter lifetime than the Prusa Mini.

b. X-Y Axis Linear rails

The usage of MGN linear rails is among the benefits of the Kingroon KP3S over the Prusa Mini.

Though on paper they may be more accurate than the linear rods in the Mini, there are not major variations.

c. Bowden vs. Direct Drive

The Direct Drive extruder is another benefit over the Mini. This is preferable if one intends to print using flexible filaments. Yet, it adds weight to the printer, resulting in a slowdown in print speed.

d. Customizable Firmware

The Kingroon KP3S has the benefit of operating Marlin and the ability to compile custom firmware. Makers can also use one that has already been tweaked by the other users in the community.

e. Click Wheel vs. Touchscreen

As a personal preference, some users may prefer a touchscreen to a traditional clickwheel screen. Even though the functionality is nearly identical.

The Prusa Mini has the advantage of receiving upgrades over time. The Kingroon KP3S firmware is most likely not going to be upgraded.

f. Auto vs. Manual Bed Leveling

With the PINDA probe that comes with the Prusa Mini, it comes with an auto leveling of the print bed. The Kingroon KP3S expects the user to manually level the bed, something quite a burden for a complete novice.

g. Experience that isn’t as refined

The Prusa Mini, the Kingroon KP3S provides a less sophisticated experience. The KP3S requires some construction and installation. Whereas, the Mini is ready to use straight away.

Firmware changes for the Prusa Mini are frequent, improving performance over time. The KP3S will most likely be dead with the same firmware inside.

Finally, the Prusa Mini comes already calibrated. The PrusaSlicer offers more profile templates for a variety of filament materials. For optimal results, the Kingroon KP3S will need some more time to calibrate.  Depending on the filament material in use.


Final Conclusion: Is the Kingroom KP3S worth buying?

Kingroon KP3S 3D Printer Review

The Kingroon KP3S is a decent cheap 3D printer for any novice or more experienced user. As it is quite costly and works quite well for the price. It’s also small, making it an excellent supplementary printer.

To begin with, the Kingroon KP3S had minimal expectations. Because it’s not a true project quality 3D printer that needs some changes to produce consistent prints.

The Kingroon KP3S comes calibrated right out of the box, and the only thing annoying about it is the noisy fans.

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