Prorifi3D Upgrade Kit for Original MINI/MINI+

Motor: XY Motor Upgrade
Add on: Dual Belt Plus for free
Sale price$99.00

Shipping calculated at checkout

Current lead time: 4-8 weeks before shipping


This Kit is for the Prusa MINI/MINI+

For the Prusa i3 MK3/MK3S/MK3S+

For other none Prusa machines

Significantly improved print quality and speed

The Prorifi3D upgrade kit for Original MINI/MINI+ can significantly improve print quality and print speed.

Prorifi3D Motors

 Better Print Quality

We have researched and solved the VFA (MRR) which is a surface quality problem that plagues FDM 3D printing for a long time.

Motor Resonance Rippling (commonly known as VFA) is a major factor in print surface quality loss. We designed specialized and optimized motors for the X and Y axis that can greatly reduce vibration which causes the MRR and hence solve the problem from the source, boosting the surface quality.

Each X and Y motor we produce is tested with reports attached and only those with more than 75% vibration reduction relative to the original ones are qualified. By doing so we make sure that every motor we delivered will reduce MRR from the source and improve the print quality.

Better Performance

 Compared to the original motors, the Prorifi3D motors offer higher performance by reducing resistance and inductance while maintaining the same holding torque. Through testing and optimization, by increasing the motor's operating current appropriately*, our motors achieve up to 2x the maximum speed and 5x the maximum acceleration** with only a 20% increase in heat generation. The heat sink included in the kit even keeps the motors running cooler than the stock condition, ensuring stability.

* The motor running current of the MINI series can be adjusted directly via G-code, without modifying the firmware

** Original: default 180mm/s@1000mm/s^2; Upgraded: 360mm/s@5000mm/s^2
Max speed and acceleration of the MINI/MINI+ can be adjusted directly via G-code, no firmware modifications required

Easy to upgrade

  • Same dimensions and connectors as stock motors.
  • Same rated current (1A) and holding torque (0.48Nm) as stock motors.
  • Fully compatible with stock firmware on Original MINI.
  • Easy and fast direct replacement.


Dual Belt Plus 

We designed an innovative dual belt system that shifts the two belts by half-pitch to compensate for the polygon effect caused by the belts. These improvements, combined with our motors will make your machine almost eliminate MRR and further reduce other imperfections such as Ringing, achieving an almost perfect surface print quality.

Print result after modification

3DBenchy printed before and after Prorifi3D Upgrade kit modded on Original MINI

* Same G-code, speed, filament, etc. Sliced in original 0.15mm QUALITY mode.

Appearance after modification

For more technical details about MRR, please visit our technical details page here


As an Open-source project, our solutions and kits are developed based on the findings from the community. We cannot go this far without all the active members of the 3D Printer Community around the globe, who shared their wisdom and experiences with us. Our solutions are upgrade kits that are built upon the existing designs. Here is a list of names and projects that we would like to thank and credit for their direct or indirect inspiration for our research and solutions:

Original MINI
Bear Upgrades

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