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Release status: Working
RUMBA (R.eprap U.niversal M.ega B.oard with A.llegro driver) RUMBA is a feature rich all-in-one electronics solution for Reprap and other CNC devices.
It features an onboard ATmega2560. Its six motor outputs are powered by Pololu pin compatible stepper drivers.
The board features a developer friendly expansion port supporting giving access to all unused I/O, ADC and I2C pins.
RUMBA is designed to be flexible in the user's power source availability, allowing any power supply from 12V-35V.
RUMBA USB Driver for Windows
- compact size: 135mm x 75mm
- fully integrated all in one solution:
- Arduino 2560-R3 compatible (works with Sprinter, Repetier, Marlin out of the box)
- ATmega16U2 (with enhanced firmware) for high speed USB serial connection (up to 2MBit)
- UNIVERSAL POWER:
- can be used with 12V-35V for motors / heated bed
- integrated high precision power regulators (DC/DC) for:
- 12V (FAN/Light/...) and
- 5V (ATmega2560/Logic)
- power input selector for ATmega/logic (stand alone or power from USB)
- easy DISPLAY + SD-CARD connector:
- RepRapDiscount SmartController compatible pin header on board
- up to 6 motor driver with easy micro stepping setup (micro switches) which can be used for:
- TRIPLE extruder
- DUAL Z driver and DUAL extruder
- 5x temperature ADC connectors for thermistors:
- e.g. 3x extruder thermistor + 1x heated bed thermistor + 1x chamber thermistor
- 5x PWM capable power mosfet outputs (3 with voltage selector for MainPower/12V):
- e.g. 3x (MainPower) extruder heater cartridge/power resistor + 1x (12V) fan + 1x (12V) light
- 1x PWM capable power mosfet with extended cooling area for heated bed
- 6x end stop connectors with power supply
- can be used for mechanical, opto, hall, ... end stops
- screw terminals *and* pin header for easy motor connection:
- can be used with existing 4 pin Molex plug on motor cable
- easy to attach cables without plug
- USB connector and USB pin header (useful when mounting in a small box)
- Power and ALL unused pins available on EXP-3 feature connector:
- +5V and +12V
- 2x ADC
- 2x PWM I/O
- 4x I/O
- full JTAG support
- JTAG can be used during full operation (no shared pins)
- easy to develop/debug new or optimized firmware using Atmel Studio
Some versions of the Rumba contain dip switches located underneath the driver boards, but current versions may contain a row of 3 jumpers.
|0||0||0||Full step (2-phase excitation) with 71% current|
|1||0||0||1/2 step (1-2 phase excitation)|
|0||1||0||1/4 step (W1-2 phase excitation)|
|1||1||0||8 microsteps / step|
|0||0||1||16 microsteps / step|
|1||0||1||32 microsteps / step|
|0||1||1||32 microsteps / step|
|1||1||1||32 microsteps / step|
from the ic manual. http://www.pololu.com/file/download/drv8825.pdf?file_id=0J590
|1||1||0||8 microsteps / step|
|1||1||1||16 microsteps / step|
Smart Controller (optional)
The Rumba uses a standard USB Mini-b (5-pin) female connector.
Wiring for the 4-Pin USB Connector:
Starting from the black triangle the pins-outs are:
mass data+ data- vcc
black green white red
Wiring plan based on available information , may contain wrong information ! / recheck necessary.
ATX power supply (controlled with RUMBA)
Set the power jumper in "stand alone" position
Connect GND from your ATX power supply to USB header Pin1 (where the black triangle is)
Connect 5 VSB from your ATX power supply (+5 VDC Standby Voltage) to USB header Pin4
Connect GND and PS ON (Power Supply On) from your ATX power supply to PS ON header, polarity doesn't matter
You'r now able to switch your power supply on and off via gcode or smart controler. With ATX +5 VDC Standby Voltage RUMBA is always powered on even if the power supply is turned of via RUMBA.
Can be activated with the usual M106 Sxxx and deactivated with M107 (or M106 S0)
Could be activated by using Mcode : M42 P8 Sxxx (0 < xxx < 255)
RUMBA Firmware Pin Configuration
This is an example only! Most likely your firmware of choice will have support for RUMBA built in
As of Marlin v1.0.0 pins.h contains the below suggested definitions, you should only need to change Configuration.h.
To flash your firmware of choice with the Arduino suite you have to select "Arduino Mega 2560 or Mega ADK" as Board.
Add to pins.h:
/**************************************************************************************** * RUMBA pin assignment * ****************************************************************************************/ #if MOTHERBOARD == 80 #define KNOWN_BOARD 1 #ifndef __AVR_ATmega2560__ #error Oops! Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu. #endif #define X_STEP_PIN 17 #define X_DIR_PIN 16 #define X_ENABLE_PIN 48 #define X_MIN_PIN 37 #define X_MAX_PIN 36 #define Y_STEP_PIN 54 #define Y_DIR_PIN 47 #define Y_ENABLE_PIN 55 #define Y_MIN_PIN 35 #define Y_MAX_PIN 34 #define Z_STEP_PIN 57 #define Z_DIR_PIN 56 #define Z_ENABLE_PIN 62 #define Z_MIN_PIN 33 #define Z_MAX_PIN 32 //to use Z_DUAL_STEPPER_DRIVER in Marlin #define Z2_STEP_PIN 26 #define Z2_DIR_PIN 25 #define Z2_ENABLE_PIN 27 #define E0_STEP_PIN 23 #define E0_DIR_PIN 22 #define E0_ENABLE_PIN 24 #define E1_STEP_PIN 26 #define E1_DIR_PIN 25 #define E1_ENABLE_PIN 27 #define E2_STEP_PIN 29 #define E2_DIR_PIN 28 #define E2_ENABLE_PIN 39 #define LED_PIN 13 #define FAN_PIN 7 //additional FAN1 PIN (e.g. useful for electronics fan or light on/off) on PIN 8 #define PS_ON_PIN 45 #define KILL_PIN 46 #define HEATER_0_PIN 2 // EXTRUDER 1 #define HEATER_1_PIN 3 // EXTRUDER 2 #define HEATER_2_PIN 6 // EXTRUDER 3 //optional FAN1 can be used as 4th heater output: #define HEATER_3_PIN 8 // EXTRUDER 4 #define HEATER_BED_PIN 9 // BED #define TEMP_0_PIN 15 // ANALOG NUMBERING #define TEMP_1_PIN 14 // ANALOG NUMBERING #define TEMP_2_PIN 13 // ANALOG NUMBERING //optional for extruder 4 or chamber: #define TEMP_2_PIN 12 // ANALOG NUMBERING #define TEMP_BED_PIN 11 // ANALOG NUMBERING #define SDPOWER -1 #define SDSS 53 #define SDCARDDETECT 49 #define BEEPER 44 #define LCD_PINS_RS 19 #define LCD_PINS_ENABLE 42 #define LCD_PINS_D4 18 #define LCD_PINS_D5 38 #define LCD_PINS_D6 41 #define LCD_PINS_D7 40 #define BTN_EN1 11 #define BTN_EN2 12 #define BTN_ENC 43 //encoder rotation values #define BLEN_C 2 #define BLEN_B 1 #define BLEN_A 0 #define encrot0 0 #define encrot1 2 #define encrot2 3 #define encrot3 1 #endif //MOTHERBOARD==80
Change in Configuration.h:
#define MOTHERBOARD 80
if you are connecting the Reprap discount smart controller uncomment this line:
JTAG & ISP (for firmware developer)
ATmega 2560 STK500v2/Arduino2560 Bootloader
FUSES: E: 0xFD / H: 0x10 / L: 0xFF
Source: Arduino bootloader
16U2 LUFA/Arduino based USB2Serial Firmware
FUSES: E: 0xF6 / H: 0xD9 / L: 0xFF
Source: File:RRD-RUMBA SRC 16U2 FIRMWARE.zip (Atmel Studio 6 project)
Open Source Files
You can find the open source files here: http://forum.reprapdiscount.com/forums/oss/
Where to get it?
- Worldwide: RepRapDiscount online shop
- France: eMotion Tech
- Germany: reprapteile.de
- Australia: Robotronics
USB connection (Writing in progress)
without any reason, the USB connection to the RUMBA is not possible. When connecting the USB cable to the computer, the operating system does not see any device. If the board is provided with a SD card reader, printing with a SD card is still possible.
First, be sure that the problem is not due to a bad position of the power jumper. The problem could be caused by the USB2Serial firmware. Then, you should flash the firmware following these steps:
- Set the power jumper in "USB powered" position.
- Place a jumper slightly on the two pins pointed by the white arrow (see picture below). (These are the Ground and Reset pins of the ISP programming header for the ATMega16u4 chip that handles the USB communication.)
- If the board is not mounted on your printer, place it on a clean, dry and insulated surface.
- Connect the USB cable on the board, and connect it on your computer
- Remove the jumper (be careful not to make short-circuit, do not use metallic tools). The TX and RX leds are flashing: the board is now in DFU mode.
If you are running Linux or Mac OSX, you can now flash the firmware by doing this:
- Download and unzip File:RRD-RUMBA ATmega16U2 USB2Serial.hex.zip on your home folder.
- Install the software dfu-programmer. You must have the version 0.5.5 or above (Ubuntu 13.10 or higher).
- Mac users can install via Homebrew
$ brew install dfu-programmer
- With root privileges (or sudo command), execute this command line to flash the firmware:
sudo dfu-programmer atmega16u2 flash RRD-RUMBA_ATmega16U2_USB2Serial.hex
- You can now disconnect and reconnect the USB cable, and try to connect your host software to the board. The board should now be listed with the "lsusb" command.
RepRapDiscount Smart Controler
The smart controler is beeping and flashing, rumba isn't responding
On some rumba boards the silk screen labeling on EXP1 and EXP2 is wrong. Try turning each connector by 180°.