Duet Gen 3 Teaser
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@edgars-batna said in Duet Gen 3 Teaser:
@deckingman The gantry above the head makes it really stand out. It's alarmingly impressive.
Funnily enough with just the 6 extruders the gantry it is actually smaller in X and Y but a bit taller in Z than the 5 extruder gantry I had before. But when I added the expansion boards, it suddenly looked so much bigger, even though they only add about 15mm to the width either side. I thinks it's just because it turns a pyramid shape into a cube but the overall width and height remain almost the same.
What I do like is that before, I had a huge cable drag chain with 40 plus conductors going to the extruder/hot end gantry. Now I just have power in and data in and out to the expansion boards and a carrier bag full of old cable that I've torn out.
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I probably should have added these pics as well.
The expansion boards are fixed to the extruder gantry using knurled thumb bolts. So to gain access to the connectors, I can undo the upper ones and then the boards can be hinged from the bottom like this....
To gain access to the 6 extruders for loading filament and so forth, I can remove the lower thumb bolts and the boards can be hinged from the top like this.........
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I didn't realize you can use multiple expansion boards until a few days ago when I saw your printer. Which cables are used to connect to the main Duet 3? It looks surprisingly clean considering how much stuff is going on.
I also now wonder if there will ever be an adapter or cable to connect older type boards to Duet 3?
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@edgars-batna
As well as the ability to run >12 steppers, being able to mount expansion boards closer to motors was one of the big reasons why I wanted to upgrade.Expansion boards are "daisy chained". So each one has data in and data out. The last board in the "chain" has links across a couple of pairs of pins. There are 4 DIP switches which are used to set the board address. It's a binary address so from 0 to 1111 which is 15 in decimal and which means that there can be up to 16 expansion boards. The data cables are two twisted pair with RJ11 plugs so High Speed ADSL 2 are ideal. On the advice of DC42 I bought some Kenable ones in various lengths. I did buy a crimping kit to make my own which was OK with solid core cable but I needed multi-core flexible for the moving gantry, and I failed miserably when I tried to fit RJ11 plugs to this type of cable.
My understanding is that the Duet guys plan to have a range of expansion boards which will have different functionality. I wouldn't be surprised if one of those boards might be along the lines of the smart effector - a kind of smart tool board, but that is just speculation on my part. And perhaps we might see boards designed for use with external steppers, or perhaps a camera. Again, just speculation on my part but I can see all sorts of possibilities using a CAN bus approach.
Edit. Ref the printer being "clean considering how much stuff is going on", that's one advantage of having all those gantries - plenty of channels to run cables in.
I used about 70, one metre lengths of Open Build slot cover (big thanks to Ryan from Ooznest!!). -
@edgars-batna said in Duet Gen 3 Teaser:
I also now wonder if there will ever be an adapter or cable to connect older type boards to Duet 3?
I doubt that will be something we would make as the older Duet processors do not support CAN-FD which we use for the BUS. Someone may hack something together to use the ethernet network and write custom firmware so that a Duet 2 board could be an expansion module on a Duet 3 controlled machine...but thats a lot of work!
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so @deckingman is famous now:
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@T3P3Tony he he, won't take 'em long to find him hiding on here either!
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Bugger. I've spent the last 66 years keeping a low profile. Hardly any pictures of me exist. I don't "do" any social media. No twitter, no Facebook, nothing. But now I have been thrust into the limelight...........
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@deckingman I'd love to get by without facebook etc but I thing my group +/- a few years were the first to go through where socials are expected.
Anyhow you're a blogger!
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@deckingman said in Duet Gen 3 Teaser:
But now I have been thrust into the limelight...........
Now that you are a star, life will never be the same....
Seriously, if you would design it now from scratch, would you do anything differently?
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@zapta said in Duet Gen 3 Teaser:
Seriously, if you would design it now from scratch, would you do anything differently?
Of course - many things. For one thing, I'd pay more attention to fixings when designing parts to reduce the number of different lengths and diameters of bolts and screws. I'd probably make it slightly wider at the base so that it is more stable. I'm not entirely happy with the way the filament reels are mounted because it increases the overall width to the extent that it won't quite fit through a door without taking it apart.
It will continue to "evolve". Now that I have an insulated garage door, I plan to move it out of my spare bedroom, as soon as I can make space for it in the garage. So I'll likely fit retractable wheels or castors to make it easier to move around. Loading filament is a bit of a pain with 5 or 6 reels and I'm not very disciplined at removing it from the printer. So I plan to enclose the reels and fit some sort of dryer/dehumidifier. Or I might enclose the entire thing in a cubicle of some sort. Then I have an old 17" laptop kicking around, which isn't much use. So I plan to hang that on the printer using an arm of some sort. And of course, I have to buy/design/make a better "mixing" hot end......
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I was thinking about your three levels of gantries, (1) hotend, (2) extruder, and (3) counter balance. Theoretically #2 could be fed with only the low frequencies of the movement of #1 and with some lookahead planing. Just to be in the general area. This may also eliminate the need for #3. Also, have you consider having #2 on separate frame/legs than #1, this way it cannot induce vibration to the frame of #1, eliminating #3.
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@zapta If you take a look at my blog you'll see that #3 has no effect on print quality which is just fine. It simply stabilises the printer when running at high speed. If I was starting from scratch, I probably wouldn't bother to add it but having already spent the time and money, there is nothing to gain by removing it.
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@deckingman said in Duet Gen 3 Teaser:
Bugger. I've spent the last 66 years keeping a low profile. Hardly any pictures of me exist. I don't "do" any social media. No twitter, no Facebook, nothing. But now I have been thrust into the limelight...........
Well deserved recognition for having created such an amazing machine!
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Duet and I got another little mention here from about 4:20 https://www.youtube.com/watch?v=1QRzS1BXy9Y&t=2s
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@deckingman said in Duet Gen 3 Teaser:
from about 4:20 https://www.youtube.com/watch?v=1QRzS1BXy9Y&t=2s
btw can change the t=2s to t=260s to start at 4:20
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@bearer said in Duet Gen 3 Teaser:
@deckingman said in Duet Gen 3 Teaser:
from about 4:20 https://www.youtube.com/watch?v=1QRzS1BXy9Y&t=2s
btw can change the t=2s to t=260s to start at 4:20
Oh, that's clever. Thanks.
