Einsy Rambo Clone | 3D Printer Mainboard | 8-bit


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The Einsy Rambo mainboard clone is an all in one 3D printer controller. It is a compact design with the Arduino MEGA and Trinamic TMC2130 stepper drivers all on one integrated PCB. A great alternative board if you need just the basics and is compatible with Marlin Firmware.


Einsy Rambo Clone Description

The Einsy Rambo clone comes from one of UltiMachines newest 3D Printer Mainboards. This 3D Printer controller features onboard TMC2130 stepper drivers with up to 1/256 microstepping. This board also features Serial Peripheral Interface (SPI) control over stepper current instead of basic Pulse width modulation (PWM). This can all be setup and tuned from the firmware instead potentiates on the drivers.

Another great thing about the Einsy Clone is there are three replaceable ATO fuses that can be found at your local automotive store or right here! This board is directly compatible with Marlin Firmware and there is some really good documentation out there to set it up.


The Einsy Rambo clone features the following specs;

  • 4 TMC2130 1/256 stepping drivers
  • 4 PWM Mosfet outputs
  • 3 thermistor inputs + ZProbe thermistor
  • SPI (Serial Peripheral Interface)
  • SMPS supports hostless printing on power supply voltages from 10-24V DC
  • 2 fuse protected power rails
    • Heated Bed, 15A
    • Primary Power 10A 10-24V
  • Motors & Logic (5A dedicated fuse) + Extruders
  • Fans (5A dedicated fuse)
  • LUFA USB (Lightweight¬†USB Framework for AVRs
Einsey Rambo Wiring
Photo from: https://reprap.org/wiki/EinsyRambo

Einsy Rambo Clone Firmware Configuration

The Einsy Rambo clone is based off the RAMPS pinout with minimal modifications to the configuratiion files of Marlin Firmware. You can download the lastest firmware here: https://github.com/MarlinFirmware/Marlin

If you need help configuring Marlin Firmware here is a great guide for beginners: http://3daddict.com/beginner-guide-marlin-printer-firmware/

Compatible Connectors

This board was designed for Positive Latch Connectors.

  • 4-pin connectors – Molex 5057-9404
  • 3-pin connectors – Molex 5057-9403
  • 2-pin connectors – Molex 5057-9402

Einsy Mainboard Dimensions

This Board is approx 105mm x 71mm [4.13″ x 2.79″] this is the same dimensions as the Mini Rambo 3D Printer Mainboard.

Einsey Rambo Dimensions

This board is open source and you can find many of the board files and specifications here: https://github.com/ultimachine/Einsy-Rambo

Einsy Rambo Clone Summary

All around a great little board to control your 3D Printer. This board was originally a collaboration with Joseph Prusa and Ultimachine for the Prusa i3 MK3. As this board was designed open source it was only a matter of time before the clones came out. The clones work great but if you are looking for the original board you can find it at the UltiMachine. It’s a higher price, better quality and they have some of the best tech support around.

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