Duet 3 Mainboard 6HC - initial production run.
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@leonmf said in Duet 3 Mainboard 6HC - initial production run.:
My experience with Raspberry Pis were that they are a full OS and don't particularly love being shut down without going through a clean shutdown. Something that a device with an off-switch isn't all that great for. Perhaps my early experiences with Raspberry Pis reflect a fear about dirty shutdown corruption that isn't a reality any more. Do I have any reason to be concerned on this or are my fears several years out of date?
Hard to prove a negative... but... I use RPi boards quite a bit. My "pull the plug" to shutdown ratio is probably 50:1 dirty. I've never seen any signs of corruption. Not once have I had to rebuild a flash. All my experience is 3B or 3B+ forward.
I have one zero, about six or eight 3Bs and/or 3B+, and quite recently two 4x4 (the all wheel drive Pi).
I have been running a 3B+ as the HMI (Human Machine Interface) for a "PlanetCNC" controller on a large-ish CNC router. This involves running PlanetCNC proprietary software on the Pi. The Pi was not perfectly stable, it would lose communications (USB) with the controller every few hours, when continuously cutting. I know it was the Pi because the same controller would run as long as I cared to test it when USB connected to a Win or Mac. I know it wasn't RFI from the motors or belts or etc. because it failed exactly the same with everything but the Pi and the Controller powered off.
The Pi 4x4 has just finished testing and is going into the shop in the next few days. It has been perfectly stable during testing, for as much as 20+ hours of (pseudo-) cutting.
The 4 is NOTICEABLY faster, more fluid in the GUI, than the 3B+. Quite nice.
TL;DR
- I've never corrupted a Pi 3 or above flash via hard power off.
- Try really hard to get a Pi 4 with 4Gig Ram, for your Duet3.
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In my experience this deepens on the quality of the sd card.
I had problems with "dirty shutdown corruption" too, then I replaced regular sd-card with a industrial grade sd card and this system works over 2 years with many, many dirty shutdown without any problems.
They are also some ext4 flags with can make it more hard to brake and you can even split the sd-card into partitions and mount the system as "read-only", only move home and other directors to a second partition with have write enabled. -
@gtj0 said in Duet 3 Mainboard 6HC - initial production run.:
Any still available in the first batch?
We have sold the whole first batch, less a small reserve in case there are any that have an issue on testing, After testing is complete we might be able to release some more.
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@t3p3tony Tony as a matter of interest how many are in that first run? Do you have an estimate of delivery status ie when you are looking to ship them out?
Doug ps see you at TCT (you could take mine there for me to collect if that is easier!)
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@dougal1957 First batch will start to ship next week, once we have an idea of how long the testing takes I will be able to give a forecast of when it will be shipped out!
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For clarification: although we designed the Duet 3 to work with a RPi or other SBC to provide the user interface, network interface and file storage, it's possible to run it standalone (i.e. without the RPi) using the built-in SD card socket and Ethernet port, and to attach a PanelDue. Currently this requires a different build of the firmware, but I expect to combine the two builds in due course. You would need to provide your own SD card image and populate it with suitable files. The network functionality when running standalone is similar to the functionality of RRF3 on a Duet Ethernet.
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Hi, I`m working on a CoreXY design based/inspired by RailCore.
Dimensions : 440x440x 580mm
I Plan to install the power module in the lower part of the frame.
My question is - is it ok to install the Duet 3 + Pi in the same place? or do I get problems because of too long wires to the extruder/hot end?
Is it better to install the controller in a separate box towards the top to get shorter wires?
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@mundsen I'd read installing the boards on vertical surfaces helps with cooling the stepper drivers, or in Duet3 case the MOSFETs. Perhaps compromise and install on the vertical real surface?
PT100 are being read by the same daughter boards as used for the duet 2 boards, so their leads are likely to need careful routing to avoid major noise sources.
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Wire length in itself isn't going to be an issue, voltage drop and or noise could be potential issues, but that's just a matter of using sufficiently large wire gauge and possibly shielded cabling. However I don't think the proposed dimensions will be much different from my old chinesium delta kit which didn't have particularly heavy wire nor any shielded wires and worked just fine. If you can go with 24v heaters you'll have less voltage drop due to lower currents.
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I plan to use 24v
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@mundsen The RPi has an SD card that you may occasionally need to access. The main board also has things like diagnostic LEDs and it helps if you can see these. There is also a reset switch which you may have to resort to pressing if things go horribly wrong. Personally, I prefer to have good acccess to these things even though it is on very rare occasions that you need too.
Size wise - don't worry about it. My CoreXYUVAB is mostly 600mm wide and deep but the upper (UVA and B) gantries are wider and deeper and it's about 1.7 metres tall.
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@deckingman Thank you - Seems like the best option is a "box" on the side for simple access
But I`ll install the PSU in the lower part. -
I plan to combine the Duet 3 with a Raspberry PI 4 2GB
Most of the time I will manage the printer from my Windows computer connected using Ethernet.- a iPad or android tablet as an panel due alternative.
Or is it best to connect a HDMI touch lcd to the PI?
Trying to find what is the best combination while waiting for the Duet 3 to arrive
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@mundsen I plan to use an HDMI connected touch screen. you could also use a screen connected to the Raspi display connector but HDMI is easier to work with for me.
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@t3p3tony Do you have an URL for the display you plan to use?
Recommended resolution/inches?
I quess this is more responsive/stable compared to iPad/Android Tablet (WiFi) ?
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@mundsen I just picked something up off amazon - it hink it was the recommended 7 inch HDMI display. We are also looking at sourcing "official" ones from the same supplier as the PanelDue screens but thats not confirmed and will be a while.
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Something like this? or 1080p on 5 inch a bit small?
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@mundsen i went with a 7 inch one and cheaper but basically the same. as its attaching to the Pi I would check that it works with that.
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@dc42 thank you, tho I'm not really interested in getting a full duet 2, that's why I was asking about the Maestro. I can certainly live without the feature, I just thought it would be handy if it can be used with the older cheaper board.
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Looks like was about a month too late on this. Looked last night and already out of stock.
Any ideas on timeline for the full release?
I'm working on my own printer design, but I'm not nearly ready for electronics yet, so I may wait to get a duet 3 instead of a duet 2 + Duex5 if it won't be too long.
