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

@jbergene

According to this picture

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

@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

@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?

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

@gloomyandy
I nominate this as macro of the month

@seventhwhiskey
With M563 you shouldn't use the real driver numbers for the extruders, but their logical order as they appear in the M584 drive mapping.
Tool 0 is D0; Tool1 is D1

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

@cr3d
...what cosmowave said.
You can trigger your own filament-out macro with the filament sensor, which in the end toggles a different I/O pin. This pin is the 'official' filament-out pin defined in config.g

@Mafco77
Hi, the rotary base looks really sturdy and well designed.
But the z-axis looks quite wobbly and top-heavy. The x-beam is only 2020 extrusion?
I guess, you've chosen that z-design because you ran out of stepper drivers?

If you encounter problems, you could go for a beefier x-beam and two linear rails. Even better would be a second passive gantry on the top frame coupled to the driven gantry with an 'anti racking' wire mod.

@Aurimas Just for clarification, you can't control a fan connected to "always on " headers.
But I guess, that's not what you wanted.

A solution to your problem is a while loop in the daemon.g file:

Pseudo code:

while
   if tempsensor < thresholdtemp
      run fan at 20%
  else
      run fan at 100%

@mikeabuilder Can you please add more info about your RRF version? It looks like a bug, especially because AFAIK we can't set 'iterations' to zero ourselfs.

Does it also happen when you use a global variable instead of iterations?

@engikeneer Wow to all of you!
So many elaborated infos are humbling me.
Comparing the different CVT version, my system work more like the one in a Prius but without the planetary gears.

I simply sum up two motions and the result varies with their relative speed. I have no specific idea where to put it in good use.
Since it uses two steppers, I can imagine to let them run at their best speed/torque which is at around 50% of max speed.
Summing up would then double the output speed without risking losing steps.

Here's a first prototype of the carrier

@deckingman What a sophisticated system!
I only have to change the steps/degree of one of the steppers to set the gear ratio.
Almost too easy. I wonder, what disadvantages it will show. (torquewise or such)

@JoergS5 The roller screw is interesting. But it looks a bit like a 'multi worm drive' with a lot of friction?
Using two worm gears on one pulley was my initial idea, but I came up with the belt-solution which promises better efficiency.

@JoergS5 I'm familiar with the CVT drive. It works with varying pulley diameters and the torque changes accordingly.
I'm afraid that the differential belt will not produce a huge torque difference, no matter how I set the gear ratio.
Do you know any tech-papers I could read about IVT?

//edit IVT often stands for intelligent VT which is practically the same technology as CVT.
Doesn't apply to my approach. I guess I have to test it.

Hi guys,
I tinkered around with planetary and harmonic drive designs a lot lately.
But now I have the idea to build a belt driven differential drive. It would have the ability to mimic any gear ratio from 2:1 to 1: infinite. (Yes, it could even run full speed without moving at all )
I guess I could use a modified kinematic model which adds up two (rotary) axes to a virtual X-axis. (have done similar things for my 'hitchhiker' IDEX)

The best usecase for it might be small CNC, where I'd have highspeed travel moves and very fine moves for milling/drilling. Maybe it's also adaptable for 5-bar SCARAs, but i guess belt stretch will be a spoilsport there.

The idea is still brand new to me, I might come up with a differential CoreXY design. Just have to wrap my mind around it.

Q: @JoergS5, who's our differential screw drive expert: Are you aware of any belt drive with variable gear ratio? Do you know any usecases?

Just for clarification: Mirror mode doesn't mean the part comes out mirrored, or does it?
I thought it only means that the X and U tools run in opposite directions to eliminate their inertia...
Which is IMHO an advanced Copy mode 2.0

@roig12
I guess a simple answer, like

the config and tool changing files are on the micro SD card on the Duet controller. You can access the sd-card with an internet browser.
Sometimes it's better to pull the sd card and use a card reader to create/modify the files directly.

wont work for you?
Especially because IDEX and copy/mirror mode are advanced stuff and require some detailed knowledge about your printer.
It will even get worse, if you have an SBC controlled printer.