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The Duet family of motion control electronics

Current production Duets ¶ 

FeatureDuet 2 WiFiDuet 2 EthernetDuet 2 Maestro
ProcessorATSAM4E8EATSAM4E8EATSAM4S8C
Processor features120MHz ARM Cortex M4F, 512Kb flash, 128Kb RAM, hardware floating point120MHz ARM Cortex M4F, 512Kb flash, 128Kb RAM, hardware floating point120MHz ARM Cortex M4, 512Kb flash, 128Kb RAM
Networking2.4GHz WiFi10BaseT/100BaseTX Ethernet10BaseT/100BaseTX Ethernet
Stepper drivers on-board5 x TMC26605 x TMC26605 x TMC2224
Stepper driver featuresUp to 2.4A current, microstep interpolation from x16 to x256, stall detectionUp to 2.4A current, microstep interpolation from x16 to x256, stall detectionUp to 1.4A current, microstep interpolation from any setting to x256, stealthChop2
Stepper driver expansionUp to 7 additional stepper drivers, of which up to 5 can be TMC2660Up to 7 additional stepper drivers, of which up to 5 can be TMC2660Up to 2 additional stepper drivers, either TMC2208/2224 or dumb step/dir/enable drivers
Heater outputsBed heater (up to 18A), 2 x extruder heater (up to 6A each)Bed heater (up to 18A), 2 x extruder heater (up to 6A each)Bed heater (up to 18A TBC), 2 x extruder heater (up to 6A each)
Thermistor/PT1000 inputs3, optimised for 100k thermistors, can support PT1000 sensors with reduced accuracy3, optimised for 100k thermistors, can support PT1000 sensors with reduced accuracy4, optimised for 100K thermistors and PT1000 sensors
PT100 and thermocouple daughter board support2 boards (4 channels)2 boards (4 channels)2 boards (4 channels) - second board available only if I2C expansion pins are not used
Heater/thermistor expansion5 more extruder heater outputs and thermistor inputs, 2 more PT100/thermocouple daughter boards (4 channels)5 more extruder heater outputs and thermistor inputs, 2 more PT100/thermocouple daughter boards (4 channels)(none)
Endstop or filament monitor inputs5 on-board, 7 expansion5 on-board, 7 expansion5 on-board (STP pins are 30V-tolerant)
Endstop status LEDsYesYesNo
Z probe connector4-pin with IN/GND/MOD/3V3 pins4-pin with IN/GND/MOD/3V3 pins5-pin with IN/GND/MOD/3V3/5V pins (IN pin is 30V-tolerant)
Fans3 controlled fans, 2 always-on fan connectors, voltage selectable between VIN, 5V or external supply (all fans together); 6 more controlled fans on expansion board3 controlled fans, 2 always-on fan connectors, voltage selectable between VIN, 5V or external supply (all fans together); 6 more controlled fans on expansion board3 controlled fans, 1 always-on fan connector, voltage selectable between VIN, 5V or external supply in 2 banks
Servo supportUp to 5 via expansion connector (3.3V drive unless expansion board used)Up to 5 via expansion connector (3.3V drive unless expansion board used)1 servo output on board with 5V drive (shares the output with the Z probe MOD pin and the diagnostic LED)
Input power voltage11V to 25V11V to 25V11V to 28V
Power monitoringVIN voltage and input to on-board 5V regulatorVIN voltage and input to on-board 5V regulatorVIN voltage
LCD supportPanelDue colour touch screenPanelDue colour touch screenPanelDue colour touch screen, 12864 mono graphics display (firmware support pending)
Other expansion4 GPIO pins on DueX2/DueX5 expansion board, 16 GPIO pins on third-party SX1509B-based I/O expansion board4 GPIO pins on DueX2/DueX5 expansion board, 16 GPIO pins on third-party SX1509B-based I/O expansion board2 pins usable as analog inputs, GPIO, or UART; 2 pins usable as I2C or GPIO
SD card interface speed20Mbytes/sec20Mbytes/sec15Mbytes/sec
RepRapFirmware versions available1.x series, 2.0 series1.x series, 2.0 series2.0 series

Legacy Duets ¶ 

FeatureDuet 0.6Duet 0.8.5
ProcessorATSAM3X8EATSAM3X8E
Processor featuresARM Cortex M3, 512Kb flash, 96Kb RAMARM Cortex M3, 512Kb flash, 96Kb RAM
NetworkingEthernetEthernet
Stepper drivers on-board4 x A49825 x A4982
Stepper driver featuresUp to 2.0A currentUp to 2.0A current
Stepper driver expansionUp to 4 additional stepper driversUp to 4 additional stepper drivers
Heater outputsBed heater (up to about 11A), extruder heater (up to 4A), up to 4 more extruder heaters on DueX4 expansion boardBed heater (up to about 13A), 2 x extruder heater (up to 4A), up to 4 more extruder heaters on DueX4 expansion board (last one shared with Fan 1)
Thermistor inputs23
Heater/thermistor expansion4 more extruder heater outputs and thermistor inputs on DueX44 more extruder heater outputs and thermistor inputs on DueX4
Endstop or filament monitor inputs4 on-board, 4 expansion5 on-board, 4 expansion
Endstop status LEDsYesYes
Z probe connectorNo, use expansion connector4-pin with IN/GND/MOD/3V3 pins
Fans1 controlled fan2 controlled fans
Input power voltage11V to 30V11V to 28V
Power monitoringNoNo
LCD supportPanelDue colour touch screen (via expansion connector)PanelDue colour touch screen (dedicated connector)
SD card interface speed21Mbytes/sec21Mbytes/sec
RepRapFirmware versions available1.x series (latest is 1.21)1.x series (latest is 1.21)

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