Rambo
Release status: Development
| Description | An all in one RAMPS class motherboard targeting convenience, reliability, and performance
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Summary
RAMBo (RepRap Arduino-compatible Mother Board) is an all in one RAMPS class motherboard targeting convenience, reliability, and performance.
More info coming soon...
Features
Logic
- Arduino 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
Motor Drivers
- 5 A4984 1/8th microstep motor drivers (2 connectors on Z for Prusa Mendel)
- 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
- Extra driver ports broke out for up to 3 additional drivers
PWM DC outputs (Extruders, Fans, Etc.)
- 5 outputs
- Low resistance mosfets for cool running
- Indicator led for each channel
Power
- Three independent power rails all accepting 10V-26V input voltage
- Heated Bed 14A
- Extruders 5A (fuse can be exchanged for up to 10A capacity)
- Motors and logic 5A (fuse can be exchanged for up to 10A capacity)
- Built in SMPS for 5V generation from 10V-26V Vin
PCB
- 4 layer
- 2oz copper on all layers
- High quality, High temperature FR4-TG130 PCB
- Gold ENIG finishing
