Duet3D Duet 3 ToolBoard is here, the days of a wiring rat’s nest between the mainboard and hotend of a direct-drive 3D printer are over thanks the Duet 3 Toolboards. Connecting to the Duet 3 6HC mainboard via the CAN bus, this board puts all the necessary connections for a hotend and extruder on the tool itself. While this board can keep your single-extruder 3D printer wiring down, it truly shines in multi-tool setups when paired with the Tool Distribution Board, allowing up to 4 toolboards.
The toolboard keeps your mainboard running at peak performance by handling many computations with it’s onboard ARM processor. Instead of running cables all the way back to the mainboard, this tool board accepts the connections from the extruder motor, heater cartridge, thermistor, hotend fan, part cooling fan, filament runout sensor, and z-probe.
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The Duet3D Toolboard places the control requirements for a direct drive extruder right on the tool. It controls the stepper motor driver, 3 mosfets for heaters and fans, 2 fan tacho inputs, 2 temperature sensor interfaces, filament monitor, Z probe and endstop, using an ARM Cortex M0 processor.
This reduces the number of wires needed to two power wires and two twisted pairs for the CAN bus. In comparison a direct drive extruder tool such as the E3D Hemera would normally need four wires for the stepper motor, two for the heater, three to five for 2 fans, and at least 2 for the temperature sensor: total 11 or more wires. If a filament monitor is wanted, 3 more wires are needed; and if a Z probe is wanted, another 1 to 3 wires, totalling 14 to 17.
- ARM Cortex M0+ processor running at 48MHz
- One TMC2209 stepper driver with stall detection and stealthChop. Maximum output current 1.6A peak, 1.1A RMS (pending qualification by thermal testing)
- One high current output (OUT0) intended for extruder heater, maximum current 5A.
- One 4-wire fan output (OUT1) (also accepts a 2- or 3-wire fan) intended for use as the print cooling fan. When using a 4-wire fan, the tacho reading is valid at all PWM settings. 1
- One 3-wire fan output (OUT2 ) (also accepts a 2-wire fan) intended for use as the hot end fan. NB the tacho reading is valid only when running the fan at full speed. 1
- 0.8A total for OUT1 and OUT2 when set to 12V because the maximum output current of the 12V regulator is 1A, and the 5V rail is also derived from that regulator.
- Two thermistor or PT1000 inputs (Temp0 and Temp1). One (input Temp0) uses a 16-bit ADC for high resolution reading of PT1000 sensors.
- One 4-pin connector (IO_0) - example use case a Z-probe with 5V power. As of RRF 3.01, only Z probe modes 8 and 9 are supported (see Connecting a Z probe for details)
- One 3-pin connector with 3.3V power(IO_1) - example use case a filament monitor .
- One 3-pin connector with 5V power (IO_2) - example use case an axis endstop or tool pickup detection switch.
- One 3 pin footprint (IO_3 Switch) to mount a Omron D2FD-1L30-1T ultra subminiture switch or similar - example use case is a tool docking confirmation switch.
- An integrated LIS3DH accelerometer (v1.1 only).
- Two push buttons
- Two LEDs
- 12 to 32V power input
- On-board 12V, 5V and 3.3V regulators
- CAN-FD interconnect to main controller board and other Toolboards or expansion boards