DuetWifi electronics board

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DuetWifi electronics board
Excl. Tax: $156.20 Incl. Tax: $195.25

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DuetWifi electronics board
Description

Details

Features

Fast, quiet, high quality prints


Powerful 32 Bit Processor
Atmel SAM4E8E: 120MHz ARM Cortex-M4 microcontroller with floating point unit, 512Kb flash memory, 128Kb RAM and many peripherals.

Super quiet TMC2660 stepper drivers
SPI controlled stepper drivers capable of up to 256 microstepping. Current and microsteps can both be changed on the fly for optimum speed and power efficiency.

Dual extruders
3 heater/thermistor channels for a heated bed and 2 extruders. 3 PWM controllable and 2 always-on fans. These can be run from either the input voltage, from 5V, or from external power for added flexibility.

High Power rating
Each stepper driver is capable of 2A motor current, with further increases possible after thermal testing. The bed heater channel is specifically designed for high currents.

Wifi connectivity


Dedicated Wifi module
Running on a separate processor, this leaves the main processor free to do precise stepper pulse timing and implement other advanced features.

Flexible
Connect via PC, tablet or smartphone on the same network: there is no need for an app install or internet connectivity. Also connect via USB or serial if desired.

Cable-free control
Use your printer in any room covered by your WiFi network. No need to be tethered by USB or Ethernet cabling any more.

Security
WPA-2 encryption for network security, with further security changes coming soon. The DuetWifi does not need to be connected to the internet - keep it on a local network for added security.

A pleasure to use

 
Easy and convenient
Connect directly to your printer from any modern web browser. Control your printer, upload and start prints from the browser. Monitor prints from an external webcam (not provided).

Most Printers Supported
All common 3D printer geometries are supported, with easily modified configuration templates for popular designs. Along with 3D printers a wide variety of CNC machines and lasercutters can be controlled.
 
Easy to configure
Setup your printer and update the firmware through the web interface. No need to compile your own firmware.

G-code everywhere
All settings are done through G-code, giving maximum control flexibility. Write your own macros for homing, pause, resume and much more.

Expandable


Up to 7 extruders
Support for a further 5 stepper drivers and heaters on the expansion header. Firmware support for mixing nozzles and remapping axes to use high power external drivers.

Touch Screen Support
The optional PanelDue controller provides a full colour graphic touch screen controller with virtual keyboard. Also talks G-code for maximum flexibility.

Advanced Calibration Support 
Use an optional add-on of DC42’s highly repeatable contactless IR bed probe combined with advanced firmware features for more accurate printer calibration.

Accurate temperature control
Automatic ADC gain calibration for thermistors allows for accurate and repeatable temperature setting. In addition PT100 and Thermocouples are supported through new SPI daughterboards.

 

The Duet was developed by Tony from Think3dPrint3d and David from escher3d. It is based on the Duet 3d printer electronics.

The DuetWifi is a 3D Printer controller board that is based on the high powered ARM core Atmel SAM4E8E. It integrates 5 TMC2660 stepper motor drivers, Wifi, Hi-Speed SD card slot, PT100 and thermocouple daughterboards and more.

Overview

The Duet runs the 32 bit, ARM core Atmel SAM4E8E microprocessor, as a upgrade on the SAM3X8E used on previous Duet boards. This more powerful processor integrates and FPU allowing for fast kinematic transforms for Delta and CoreXY printer geometries along with a wide range of peripherals such as a high speed, SD 2.0 compliant SD card an SD card. The stepper drivers allow for up to 256 microstepping, along with 16 microstepping with interpolation up to 256 this allows for very fast step rates and incredibly smooth, quiet motion. An expansion header allows for 5 further stepper drivers, 5 further heater channels and more to be added.

The user interface is the powerful and easy to use [Duet Web Control] which runs in a web browser, along the user interface to work on PC tablet or phone. In additon the PanelDue, a colour graphics touch screen control panel, can be connected for direct control.


In the same manner as previous Duets, this board can be used to control a laser cutter and other CNC machines

Wiring

See the Duet3d wiki for more detailed information on wiring

DuetWifi connectionsv1.0.png

Hardware

General

All connectors are Molex KK type, with lock and polarization.

Board is built with four layers, including a complete ground plane, which allow good thermal dissipation and reduce noise and ground loops.

Biggest thermal dissipation came from the bottom of the board, so cooling from below is most effective.

Processor voltage is 3.3V and inputs are not 5V compatible, so using sensor with higher voltage needs reliable protection.

Specifications

  • Maximum acceptable voltage in is 25V.
  • The TMC2660s Stepper drivers will reach 2.8A with stand still current reduction. currently they are firmware limited to 2A and run comfortably with no heatsinking at this current, see the thermal test results for more information. Drivers have a thermal safety and provide the firmware with additional information about thermal state, motor stall and correct motor connection over SPI.
  • Stepper driver current is adjusted by firmware, using a specific G-code.
  • Microstepping is variable between 1 to 1/256. High step rates, combined with smooth and quiet motion can be achieved by using 1/16 microstepping with interpolation to 256 microsteps on the driver.
  • On board 5v is supplied by a buck converter with ultimate current of 2A. This supplies the 3.3V rail, and expansion boards especially the PanelDue.
  • Micro-SD card type SDHC, to be formatted in FAT32, cluster size 32 kB.
  • Wifi transfer rates from 300 kB/sec to 1000 kB/sec depending SD card quality, file size and wifi network quality.
  • Direct connection of mechanical switches to endstop inputs is reliable with shielded or twisted cables.

Dimensions

Size 123 x 100mm, hole spacing 115 x 92mm Micro-SD slot, mini USB plug, wifi antenna, the majority of indicator LEDS, reset and erase buttons are on one small side, allowing for mounting with just this edge exposed. There is no plug for power supply, but a terminal block on the side opposed to plugs. 5V could be from internal converter or external supply, with pins aside the power supply terminal block. The board contains circuity to control a compatible power supply (such as an ATC PC power supply)

The export from KiCAD shows the board and hole dimensions:

DuetWifi Board Dimensions

With more info on the wiki

Drive numbers

Drive number for G-Code commands (M569 & others) 0:X; 1:Y; 2:Z; 3:E0; 4:E1; 5:E2; 6:E3; 7:E4; 8:E5 9:E6

These can be remapped to allow for example X, Y and Z to be on drive number 5,6,7 on the expansion header for easily using large external drivers.

Wifi

The Wifi connection is handled by the onboard Wifi Module, which connects via high speed SPI to the main processor. The Wifi module runs the Web server, offloading the main processor. Gcode and firmware can be uploaded via wifi, firmware can be updated OTA. In addition once a print has started the browser can disconnecr form the printer and then reconnect at a later time.

Open hardware license

The Duet hardware design is licensed under the CERN OHW License 1.2: the design is free to be distributed and modified within the terms of this license. All the design files are available on Github. The Duet was completely designed using the Open Source software package KiCAD so hacking and building on this design is accessible to all.

Software

The Duet runs RepRap Firmware, initiated by Adrian Bowyer, which was initially designed for it It has now been rewritten and expanded by David Crocker (DC42 on the forums). The software can receive G-Code from the USB serial port, the SD card and the Ethernet interface.

Its philosophy is everything is done with G-code, including all configuration and it use an extended set of G-codes.

Configuration file is read on SD card at start-up. Interactive configuration with immediate feedback is possible.

A pre-compiled version of the firmware is supplied with each new release. Average user never have to compile the program and does not need any development tool.

SD image shall be copied on SD-card and macros may be adapted for a given configuration. Firmware updates can be copied over Wifi, USB or though directly writing to the SD card. the firmware updates can be triggered via WIFI, USB or PaneDue. See Duet_Firmware_Update for more information

When Duet board is connected via Wifi, any network device having access to your network can operate the printer with a web interface.

The software is evolving constantly. The dc42 and ChrisHamm forks includes Delta and CoreXY printer support.

See RepRap Firmware FAQ

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