Cloned RAMBo 1.4 Motherboard MEGA And Stepper Drivers All On One Integrated PCB For /Lulzbot Taz6/3D Printer

Descriptions:

This is RAMBo v1.4. The RAMBo board is an all in one 3D printer motherboard. It is a full remix of our RAMPS design with the MEGA and stepper drivers all on one integrated PCB. That is where it got the name RAMBo - (R)epRap (A)rduino-(M)ega-compatible (M)other (Bo)ard. This is the same board you will find in the Lulzbot Taz6 Printer

RAMBo v1.4 - The major difference over the previous version is the integrated LCD connector for Smart LCD Controllers. The EXT2 and SPI headers were re-arranged to remove the need for an adapter. This change is backwards compatible with firmware for previous versions of Rambo that normally utilize the RamboLCD. 

Features:

5 x integrated 1/16th microstep motor drivers, 5 PWM Mosfet outputs, 4 thermistor inputs, digital trimpot (no tiny knobs to tweak), SMPS supports hostless printing on power supply voltages from 10-24V DC, 3 independent fuse protected power rails, LUFA USB, high quality connectors

Logic: 

  MEGA compatible Atmega2560 and Atmega32u2 processors are compatible with all RAMPS class firmwares

 Crystals for both usb and mcu (timing accurate to 10ppm)

 4 Thermistor jacks

 All extra pins broken out on both processors (allows using the 32u2 for LUFA AVR programmer, etc.)

 2 channel SDRAMPS compatible SPI breakout

About Motor Drivers: 

 5 A4982 1/8th microsteps motor drivers with 1,1/2,1/4,1/16 as options (2 connectors for Z-axis)

 Digital Trimpot for stepper current control

 Current limit on driver IC VCC to prevent permanent latchup

 Microstep mode configured by MCU through firmware (no jumpers needed)

 Test points for driver control signals

 Step and Direction pins are on their own ports for synchronous movement capability