Kingroon KP3S Pro V2 3D Printer Review

Kingroon KP3S Pro V2 3D Printer Review

Kingroon KP3S Pro V2 is a high speed Klipper 3D printer with linear rails from Kingroon. This printer has a print volume of 200mm cube and uses an MKS Pi motherboard to run Klipper. The extruder has been upgraded to a 9.5:1 dual gear extruder, and the hot end uses a ceramic heater. The print head has an accelerometer built-in for input shaper calibration, and there is an inductive sensor for auto bed leveling. The printer supports Ethernet, Wi-Fi, and USB drive printing. The maximum speed is claimed to be 500 mm/s, and the recommended print speed is 350mm/s with 10,000 acceleration. The power supply is a 300-watt one, and it uses a tiny LCD screen instead of a touch screen. The price of $279 with Klipper firmware and linear rails is still pretty appealing in terms of price and hardware. 

Pros & Cons of Kingroon KP3S Pro V2

Overall, Kingroon KP3S Pro V2 has several pros, including affordability, good motion system, fast heating, strong extruder, and effective cooling. However, it also has cons like miscalibrated extruder, firmware issues, and design flaws such as loose fan duct and missing features like a filament sensor.


  1. 👍 Price of $279 is affordable.
  2. 👍 Linear rails on all three axes for high-speed printing and good print quality.
  3. 👍 Ceramic heater heats up quickly and maintains high print speed.
  4. 👍 Strong extruder with a high gear ratio for fast filament pushing.
  5. 👍 Powerful park cooling fan for effective cooling during printing.
  6. 👍 Inductive sensor for bed leveling works well without first layer issues.


  1. 👎 Miscalibrated extruder with over-extrusion issues out of the box.
  2. 👎 Firmware issues, such as X offset calibration and fan speed control.
  3. 👎 Lack of a filament sensor and limited maximum nozzle temperature.


Before setup the printer, let's check the packaging list of Kingroon KP3S Pro V2! In this package, we get all the following items, prepare a desk or space sufficient to place all parts and enough room for you to move:

  • X & Z-axis top
  • Printer base
  • Spool holder
  • 1 T8 screw rod
  • USB flash disk
  • Power cable
  • Pliers
  • 4 wrenches
  • Adapter cable
  • Network cable
  • M5*6 - 3pcs
  • M5*10 - 3pcs
  • M5*30 - 3pcs
  • 0.4mm nozzle
  • EMMC adapter

The packaging of the printer is similar to other 3D printers, with all parts protected by laser-cut foam. The assembly of the printer is straightforward and will only take a few minutes. We will following assembly steps:

  1. You need to put the x and z axis on the base, two M5 * 10 screws are used on the bottom, two M5 * 30 screws are used on the rear.
  2. Lock the Z-axis fixing block on the base.
  3. Insert the T-screw rod into the T-shape nut, lock it with a coupling.
  4. Fix the filament holder on the top of the Z-axis with two M5*6 screws.
  5. install the screen, and power cord, and you're good to go.

Setup of Kingroon KP3S Pro V2

On the front side of KP3S Pro V2 base, there are connections for an HDMI cable, a slot for a TF card, and a USB Type-C plug. On the left side, there is a wire for the X motor, an ethernet connection, and some USB plugs. 

To set up Wi-Fi, you need to insert the USB drive that came with the machine, edit the WPA supplicant text file, and enter your SSID and password. After inserting the USB drive back and turning on the machine, it will take around a minute to show the main screen. If you successfully connect to your Wi-Fi network, an IP address will show up on the screen.

You can use the LCD screen to select input shaper calibration, which is done using the accelerometer inside the print head. However, the print bed doesn't have an accelerometer, but Kingroon claims that their algorithms allow them to calibrate both the X and Y axis with a single accelerometer on the print head.

Bed Leveling

The position of the KP3S Pro V2 bed is fixed. After setting the Z Offset, you can run auto bed leveling, which will create an offset mesh and compensate for it during printing if necessary. 

Input Shaper

Input shaper is the next step. Input shaping is a technique used to address resonance compensation. Resonance in 3D printing refers to the vibrations or oscillations that occur when the printer rapidly changes direction. These vibrations can lead to imperfections in the printed object, such as ghosting or ringing. The faster the printer moves, the more prominent these resonance effects become.

This phenomenon occurs because the printer quickly accelerates, decelerates, and changes directions in its movement. These rapid changes generate vibrations that impact the print quality throughout the object, especially in areas where the printer needs to change direction quickly.

To combat these artifacts and improve print quality, input shaping techniques can be used. Input shaping is a method that aims to minimize the impact of resonance and other related problems on 3D prints. By shaping or modifying the input commands to the printer, the vibrations and artifacts can be reduced, leading to better print results.

While, input shaping does not magically allow you to print faster while maintaining the same quality. It simply helps mitigate the negative effects of resonance on print quality. Currently, input shaper can be implemented using Klipper, RepRap, and Marlin firmwares.

kingroon kp3s pro v2

Pressure Advance Tuning

Pressure advance is an essential calibration for your printer. It also known as linear advance in Marlin. The transition between movements can sometimes cause blobs. But pressure advance calibration is to simulate the correct pressure throughout the entire extrusion pathway of a 3D printer. At the beginning of a line, the printer advances the filament to create the necessary pressure, and at the end of the line, it retracts the filament to maintain the correct pressure. This process aims to achieve a uniform amount of filament deposited across the entire pathway, resulting in consistent printing quality. It can help with reducing oozing and improving corner quality in 3D prints. 

350mm/s High Speed Print

The printer claims its top speed is 350mm/s, and you can test it by printing a sample benchy. The sound level when printing at a high speed with the part cooling fan on is around the mid-60s, which is not too loud but not quiet either.

Upgrades of Kingroon KP3S Pro V2

Kingroon KP3S Pro V2 fan duct (remix to reduce height)

from @auroratechchannel, available to download on Printables.
kingroon kp3s pro v2

Kingroon KP3S Pro V2 Canbus Connector Guide

A connector guide for the Canbus connector on the extruder to avoid the risk of disconnects caused by the movement of the print head. You can easily secure this connector to the print head using two tie wraps. 

Design from Willy Wortel, available to download on Thingiverse, thing:6226920.

kingroon kp2s pro v2

In conclusion, the Kingroon KP3S Pro V2 3D printer is equipped with a linear rail motion system, a robust extruder, a high flow hot end, a powerful part cooling fan, and Klipper firmware, making it an ideal setup as a budget fast Klipper machine.

However, there are some issues that could have been avoided with better hardware organization and firmware version control. Some small details also haven't been well polished. If you have a certain level of 3D printing knowledge and can handle minor issues, it's still a good option for experienced users. It's not suitable for beginners looking for their first 3D printer. The lack of well-organized hardware and firmware version control has led to issues that definitely could have been avoided. Some small details also haven't been well polished. If you have a certain level of 3D printing knowledge and can handle minor issues, it's really not that big of a deal. Once the issues have been addressed, you might find this machine works pretty well and it holds considerable potential. So I would say it's still a good option for experienced users, but it's not a suitable choice for beginners looking for their first 3D printer. 

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