Hi guys,
I'm playing with my new extruder and would like to know how much it extrudes in a real print.
Is it possible to display extrusion volume in DWC? Printspeed, layerheight and layerwidth? should be available for calculations.
I extruded in free air to get ballpark numbers, but real life is different.

@gtaman
It's actually the same:

• create a global variable blockDaemon
• set global.blockDaemon = true at the start of the M300 file
• set global.blockDaemon = false at the end

Then anyone using Daemon.g for real can add these lines

while global.blockDaemon = true
          G4 S1000

Had my first simpleFOC project running today. It was an old brushless gimbal controller without encoders and with 8bit mcu.
I was able to control two motors independently and relatively smooth (USB power only)
The atmega328 was also at it's limit, but I'm now confident it will work well with the right mcu.

@m0ck1nj
Check the TB6600 datasheet. If it is OK with 3.3V signals on step, dir, enable you can wire it directly.
If it needs differential signals or 5V you can use the much cheaper expansion breakout board

First print today

Instead of a benchy, I tried the extruder-woodgrain test. Yes there is some, but hardly visible. The corners were sharp and even, that was a relieve. The close loop PID setting are quite soft, so I expected worse...

At the top third, the printspeed got so low, that the filament overheated. 10°C less temp and it was nice and shiny again.

@jbergene

According to this picture

• positive X goes to the right
• positive Y goes to the back
• positive Z goes up

@dc42 said in Smart Effector including toolboard-capabilities?:

It's clear to me that the Orbiter could not be used with a Smart Effector made to the current dimensions. We would need to increase the rod spacing to at least 80mm in order to accommodate the various parts of the extruder. We are looking into this, however it would make it unsuitable for the smaller delta printers.

Hi dc42,
I just stumbled across this thread and wanted to guide you back to 2016 , when we discussed the cycloidal direct drive. (I still have it laying around)
I've made an 45 degree adapter for it, that suited the smart effector pretty well.

Another way to mount it, was the split motor/gearbox idea.

I could try to reuse my motor and design a BMG-drive for the Smart effector?

Hi devs,
based on the "extrusion volume" thread, I also think a back EMF calculator as DWC plugin would be helpful for tuning.
The required parameters are almost completely known for the calculation. It only misses coil resistance and inductivity (AFAIK)

Since my Duet boards run on their own network, I don't have access to the EMF calculator at reprapfirmware.org

If we could integrate it as plugin and use 'live' values from the current object model/gcode file, we'd have a nice tuning tool

@nikscha I like the idea. It's like the tool-change macros.
But there is also a problem when you retract / unretract within a toolchange.
Maybe you can solve your problem by renaming G10/G11 to G10.1 and G11.1 via postprocessing. Then you need only one macro for retraction (which also contains the real G10 move)

One thing not mentioned by anyone is the G31 probe offset. Are you sure it's OK?

@gtrider I don't think 3D printing is in the main focus of this new regulations, although we could print illegal stuff.
But that's more a concern of the sites who host these designs.

@dogboy If you really need high accuracy, you can add positional sensors on the motor shaft(s) and the joint(s).
Closed loop is still pretty new in RRF, but once tuned in seems to iron out all accuracy problems.
Homing the arm once in a while will have a similar effect.

@dwuk I'm not sure if I understood.

• You want to split a single object into separate sections
• you'll print them simultaneously on the same bed
• ...but your collision avoidance strategy is to spread the parts further apart?

If that's the case, why don't you build (4) individual printers and each one prints a section of the object?
You'll have to puzzle the sections together anyway, but that way it'll be way easier to setup mesh bed and all.
Plus, you don't need a huuuge bed, just to keep the toolheads clear

@dwuk Splitting the gcode file?
I never thought of this as an option when I built the hashPrinter in 2021.
In my mind it was always the slicer who had to split the object, but that approach had it's own issues.

Your approach looks very promising, although I see lots of retracts/unretracts where the tracks were chopped apart. That can end up ugly, like tons of blobs everywhere.
And of course you'll run into tool collision situations and waiting for the other tool to finish the current layer while the waiting nozzle drools dry. (just as I did)
My idea to the latter problem was, to synchronize both tool speeds, so they finish work at the same time.
Maybe you want to add that in your splitting post processor?

BTW, my hashPrinter only required 4 steppers for the whole motion system ( plus 3 for Z and 4 for extruders) and all the belts where short and straight. Not such idle roller nightmare...
But lets not start a pi$$ing contest. There are pros & cons in both designs

@droftarts I think whiteboards are a good base for testing, but you want to have a permanent drawing on paper once in a while.
Over at the "maslow" thread we even talked about technical drawings on wooden panels (cutting lines and laser markings). Even drywall could be an option (very thursty surface, they might need different pens)
A portable "strap-on" version could be useful on many construction sites. (where to put electric and water-cutouts)

@yoshimitsuspeed If you'd be able to scan the surface continuosly, you'd probably find all the scratches.
But how do you know their profile (depths and shape) ? IMHO it's impossible to calculate the right amount of extrusion.

@T3P3Tony said in Duet Polargraph:

Next stop pen changing?

I guess the hard part of that is: keeping the unused feltpen tips fresh without drying out. (A wipe-zone is not an option, unless it's outside of the actual drawing area)
I imagine a revolver-like parking device which holds the pens and covers the tips.
Electromagnets would hold/release the pens instead of a clamping screw.

Is reversing the e-magnets polarity an option with Duets heater ports? (required to attract/repell a neodym magnet)

@droftarts said in Duet Polargraph:

What drawings do you want?

No need for drawings, I was talking about the drawings you made with it. Didn't remember seeing the dragon before.

Good luck in Manchester
Olaf

@droftarts I was noticed, you've edited a post, but couldn't find any big news.
Did you add the drawings lately?

THX
Olaf

I have at least three symbols on my keyboard looking similar:

'  ` ´

Just wondering if it was a typo error? But then the FW upgrade seems to work, maybe it's more typo-tolerant ?