BBP 1

The BBP 1 includes 5 stepper driver and 3 heaters, which support dual-extruders or dual-z axis.

Microcontroller

• Texas Instrument Sitara AM335X, 1GHZ Cortex-A8 ARM
• 2 programmable Realtime Units (PRU) to generate really high frequency step and dir signals
• 4GB eMMC
• 512M DDR3 memory
• 10/100M ethernet
• microSD Card
• USB Host to connect USB disk, WiFi, Camers .etc
• USB OTG

Stepper drivers

• 5 stepper drivers
• 1/32 microsteps
• Each capable of driving bipolar steppers up to 45V and 2.5A
• Digital control of the current setting for each driver

Outputs

• 3 heaters, 2 for extruder and 1 for HBP
• 5 connectors for fan or led light belt

Inputs

• 3 thermistor inputs
• 6 endstops, 3 for min limit switch, 3 for max limit switch
• 1 connector for external power button

Extensibility

• 50 pins FFC connector for 24 bits TFT LCD and touch screen
• Serial connector for debug
• Lots of pins broken out, including stepper control signals and pwm control signals for heaters