Duex4

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Duex4

Release status: working

Duex4v2a 32bit Electronics for 3dprinters.jpg
Description
Duex4, 4 channel expansion for the Duet electronics
License
CERN OHL
Author
Contributors
Based-on
Categories
CAD Models
External Link


The Duex4 was developed by Tony from Think3dPrint3d in conjunction with RepRapPro. It adds a further 4 stepper, heater and endstop channels to the Duet 32 bit electronics allowing for a total of 9 stepper channels and 7 heater channels.

Overview

The Duex4 has 2 versions, the original version as described in this blog post, and the version 2a as described here.. The main difference between the original version and the version 2a is the addition of analog ground to reduce the noise on the thermistor readings.

Open hardware

The Duex4 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.

Duex4 v2a

Wiring

Duet 0.8.5 Duex4 wiring 0.2.svg

This is the same file as on the Duet page

Pinouts

The pinouts are on the back of the board, a KiCAD export shows the back below for reference (this is the view from the bottom of the board, so is mirrored):

Duetx4 2a back silkscreen.png

The detailed information on the pinouts is available on the Duex4 pinout page

Dimensions

Size 123 x 77.4mm, hole spacing 115 (input), 116.9 (output) x 61.23mm The 50way input header is directly in line with the 50way expansion header on the Duet.

The export from KiCAD shows the board and hole dimensions:

Duetx4 Board Dimensions

Analog Jumper

The Duex4 2a has a jumper that allows the source of analog ground to be selected:

Duetx4 to Duet 0.6 flylead Duetx4 end of flylead Duet 0.6 end of flylead

The pictures here shows a flylead connected which is required for Duet 0.6, for Duet 0.8.5 a simple jumper is all that is required.

Duex4 original

Wiring and Pinouts

Other than no VSSA jumper being present, the wiring is the same as the Duex4 v2a.

Dimensions

Same as 0.2a