Duet 3 Mainboard 6HC - initial production run.

dc42

@JoergS5 said in Duet 3 Mainboard 6HC - initial production run.:

There was a blog some time ago how to destroy a Duet 2, information how to avoid it. I would find it helpful to have the same information for the new Duet 3: what should one avoid in any case (wrong voltage at pin x/connecting pin x with y, connection cable etc.). It can be a short list which can be print out and hang it over the board while one wires it up. A cheat sheet with a caution list and the Duet 3 board as image with the dangerous places marked red.

We've tried to make the Duet 3 even tougher than Duet 2 by including additional protection mechanisms. In particular, it's designed to survive a short between the external +5V and/or +3.3V rails and +24V. But I haven't tested these protection mechanisms yet, because Duet 3 boards are too scarce to risk writing off.

One thing we didn't include protection against is reverse polarity VIN. So be sure to get the polarity right! If you get it wrong, then the board may survive, depending on the short circuit current of the power supply. I "tested" reverse polarity a couple of weeks ago and the board was OK afterwards.

dc42

@mundsen said in Duet 3 Mainboard 6HC - initial production run.:

Does the Duet3/Raspberry support USB Camera (connected to the PI) for integration in the Web interface?
I have a Logitech 1080P USB camera - possible to use?

I'm not sure whether this is implemented yet, but if not then it certainly will be. We chose a dedicated SPI bus for connecting the Pi to the Duet so as to keep the USB subsystem free for high bandwidth devices such as cameras.

mundsen

One more thing - should I get a speaker for my PI? Does the web server use sounds for warnings, autolevel ready..?

T3P3Tony

@mundsen it does not currently

@mundsen

A quick Google....

returned the following result.

USB Camera on a Rpi

mundsen

@CaLviNx I know you can use a USB camera in combination with the pi - but the web server need to support/use it to get video in the duet web interface

JoergS5

@dc42 Thank your for your information about what to avoid.

NoSkillzEngineer

Was it an RJ11 port??? Whoops! Clearly I didn't look at it particularly closely

My bad!!!

JoergS5

The Raspberry Pi 4 has an official current supply of 5.1 volt and 3 ampere. According to https://duet3d.dozuki.com/Wiki/Duet_3_Mainboard_6HC_Wiring_Diagram I can empower it by the 26 pin cable also (the note for the 26 pin header in the diagram), but is it sufficient for the Pi 4 or should I better use the official supply?

And if I shall use a separate supply, I suspect I have to connect the grounds?

Dougal1957

@JoergS5 said in Duet 3 Mainboard 6HC - initial production run.:

The Raspberry Pi 4 has an official current supply of 5.1 volt and 3 ampere. According to https://duet3d.dozuki.com/Wiki/Duet_3_Mainboard_6HC_Wiring_Diagram I can empower it by the 26 pin cable also (the note for the 26 pin header in the diagram), but is it sufficient for the Pi 4 or should I better use the official supply?

And if I shall use a separate supply, I suspect I have to connect the grounds?
Mine is running quite happily of the 26 way cable mind it is only idling at the moment but has been switched on for about 2-3 days constantly

JoergS5

@Dougal1957 thank you for confirmation.

mundsen

First initial test

Duet 3 6HC
Raspberry Pi 4 2GB
7 inch 1024x600 capacitive touch LCD
24V PSU
SD card that came with the Duet

All seems to work fine
Next, I`ll connect steppers, fans, configure WiFi/Ethernet..

mundsen

I got a question about duet 3 and pi - is the code transfered to the duet before the print Job starts or is it controlled real time by the pi during the print?

gtj0

Should the underside of the drivers and mosfets be completely soldered to the board or is there enough contact to dissipate the heat the way they are?

wilriker

@mundsen said in Duet 3 Mainboard 6HC - initial production run.:

I got a question about duet 3 and pi - is the code transfered to the duet before the print Job starts or is it controlled real time by the pi during the print?

It is controlled real time. This also allows to implement plug-ins to do arbitrary modifications while the print is in progress. For example I have implemented a first version of an Object Skipper, i.e. a plug-in that is given the information on how to identify a certain object in the GCode (many slicers put specific comments in the GCodes) and then will filter out any commands related to this object (or multiple).

This allows for a print to continue where you have multiple objects on the platform but printing fails for whatever reason for one of them.

I will probably release this early next week.

Much
@wilriker said in Duet 3 Mainboard 6HC - initial production run.:

Fur example I have implemented a first version of an Object Skipper

dc42

@gtj0 said in Duet 3 Mainboard 6HC - initial production run.:

Should the underside of the drivers and mosfets be completely soldered to the board or is there enough contact to dissipate the heat the way they are?

The connectors should be soldered, but not the thermal vias under the stepper drivers and mosfets.

gtj0

So the partially filled vias are OK?

dc42

@gtj0 said in Duet 3 Mainboard 6HC - initial production run.:

So the partially filled vias are OK?

Yes.

Cata

Will there be a variant that does not use a raspberry?