Any response from Prusa on the inconsistent extrusion?  

Re: Any response from Prusa on the inconsistent extrusion?

From what I've seen/read so far this hasn't addressed the issue, which shouldn't be surprising as it wasn't Slic3r specific.
Did you run tests at Prusa HQ ? And if so where they producing consistent extrusion results ?

From what I've seen it fixed the issue and yes it was tested at our HQ, however, I don't know the exact scenario to replicate the issue.

Re: Any response from Prusa on the inconsistent extrusion?

I recommend reading the release notes on GitHub, where everything is explained in detail 😉
https://github.com/prusa3d/Slic3r/releases/tag/version_1.39.2-beta

To be fair, how could a Slic3r update fix something that happens from gcode from any software?

Perhaps all software shares the same faulty logic? And will need to be changed in a similar way to Slic3r?

I am keeping an open mind

Re: Any response from Prusa on the inconsistent extrusion?

To be fair, how could a Slic3r update fix something that happens from gcode from any software?

In case of the Slic3r PE, the issue was caused by cooling logic and was reworked to fit better the MK3. I can't speak for the other software used to generate G-codes, but it might be the cause is similar.

Re: Any response from Prusa on the inconsistent extrusion?

From what I've seen/read so far this hasn't addressed the issue, which shouldn't be surprising as it wasn't Slic3r specific.
Did you run tests at Prusa HQ ? And if so where they producing consistent extrusion results ?

From what I've seen it fixed the issue and yes it was tested at our HQ, however, I don't know the exact scenario to replicate the issue.

It would be great if you were able to post a couple of quick pictures of successful prints (prints with consistent extrusion), the prints I've seen from Mk3 users using the new updated Slic3r show no improvement (see the latest comments in the Github thread). I've yet to see a good quality print (consistent extrusion) from a Mk3.

Like I say it'd be odd that a Slic3r update would address the problem as it's not Slic3r specific, one of the first things people tried in addressing this issue was using other slicers.

Are you aware that users reporting this problem are seeing the same issues when using other slicers ?

Re: Any response from Prusa on the inconsistent extrusion?

To be fair, how could a Slic3r update fix something that happens from gcode from any software?

In case of the Slic3r PE, the issue was caused by cooling logic and was reworked to fit better the MK3. I can't speak for the other software used to generate G-codes, but it might be the cause is similar.

And if you actually read the release notes it says it's specifically for the logic that "Slow down if layer print time is below certain time".. this happens on every layer no matter how big or small, so that logic shouldn't even be kicking in on to cause this issue.

Re: Any response from Prusa on the inconsistent extrusion?

I recommend reading the release notes on GitHub, where everything is explained in detail 😉
https://github.com/prusa3d/Slic3r/releases/tag/version_1.39.2-beta

To be fair, how could a Slic3r update fix something that happens from gcode from any software?

Because, as they say in the release notes, nearly all slicers do the same approach to slowing down to compensate...

GCode is nothing magical people - it's mostly just telling the printer what settings to change and a lot of "move in this direction, this far, this fast" and so on. If they all are using the same algorithm, they'll all produce the same G-Code (or at least very similar).

I'm not going to declare victory here, but it sounds like they've made a logical change in the approach and hopefully that will fix the issue for everyone. Of course, it makes one wonder just how big/long of a layer does one need before this slowdown doesn't need to be triggered, and why is it still appearing to happen even on large prints (although complexity of the large print layers might have something to do with it...)

Re: Any response from Prusa on the inconsistent extrusion?

I'm not going to declare victory here, but it sounds like they've made a logical change in the approach and hopefully that will fix the issue for everyone. Of course, it makes one wonder just how big/long of a layer does one need before this slowdown doesn't need to be triggered, and why is it still appearing to happen even on large prints (although complexity of the large print layers might have something to do with it...)

The setting is under cooling in Slic3r for Filament settings. Its default is now 20s, and as you mentioned most layers are more than 20s if they have infill, or they are of any moderate size.. so this doesn't change anything except maybe fix the itty bitty cubes people were using to test.

Re: Any response from Prusa on the inconsistent extrusion?

I recommend reading the release notes on GitHub, where everything is explained in detail 😉
https://github.com/prusa3d/Slic3r/releases/tag/version_1.39.2-beta

To be fair, how could a Slic3r update fix something that happens from gcode from any software?

Because, as they say in the release notes, nearly all slicers do the same approach to slowing down to compensate...

GCode is nothing magical people - it's mostly just telling the printer what settings to change and a lot of "move in this direction, this far, this fast" and so on. If they all are using the same algorithm, they'll all produce the same G-Code (or at least very similar).

I'm not going to declare victory here, but it sounds like they've made a logical change in the approach and hopefully that will fix the issue for everyone. Of course, it makes one wonder just how big/long of a layer does one need before this slowdown doesn't need to be triggered, and why is it still appearing to happen even on large prints (although complexity of the large print layers might have something to do with it...)

These changes have to do with low nozzle pressure at the seams/start of new layers... not inconsistent extrusion seen in other posts that OP was talking about. that affects the surface along the layer and not just the start of it. also some prints have moire.

Re: Any response from Prusa on the inconsistent extrusion?

I recommend reading the release notes on GitHub, where everything is explained in detail 😉
https://github.com/prusa3d/Slic3r/releases/tag/version_1.39.2-beta

To be fair, how could a Slic3r update fix something that happens from gcode from any software?

it doesn't... seems the issue mentioned isn't the issue the OP was talking about in the first place.... seems like quite a disconnect from reality if they don't even know what fixes what.

Re: Any response from Prusa on the inconsistent extrusion?

it doesn't... seems the issue mentioned isn't the issue the OP was talking about in the first place.... seems like quite a disconnect from reality if they don't even know what fixes what.

In their defense, the issue They fixed, which they specifically singled out,and did not say they fixed the inconsistent extrusion on same layer/moire.

Re: Any response from Prusa on the inconsistent extrusion?

It would be great if you were able to post a couple of quick pictures of successful prints

I'm a terrible photographer, but the results are pretty drastic to my eye.

https://shop.prusa3d.com/forum/general-discussion-announcements-and-releases-f61/-testers-needed-inconsistent-extrusion-t15433-s170.html#p80693

Re: Any response from Prusa on the inconsistent extrusion?

Can you tell the difference?

Re: Any response from Prusa on the inconsistent extrusion?

Can you tell the difference?

According to Josef and Tom that print looks perfectly acceptable. "C'mon, it's FDM printing" - Thomas Sanlanderer

Re: Any response from Prusa on the inconsistent extrusion?

Can you tell the difference?

According to Josef and Tom that print looks perfectly acceptable. "C'mon, it's FDM printing" - Thomas Sanlanderer

If that's acceptable results from the MK3, then I need to sell my MK3...

Re: Any response from Prusa on the inconsistent extrusion?

[...] According to Josef and Tom that print looks perfectly acceptable. "C'mon, it's FDM printing" - Thomas SanlandererJP doesn't say the result is acceptable anywhere in the interview. He says an article detailing the issues if forthcoming. He states that they've narrowed down the issue to drive gears and are working on a fix. When the fix is ready, they'll issue it. He notes that it's something that if you look for it, you will find it, and that other factors are often mis-diagnosed as the same issue.

Re: Any response from Prusa on the inconsistent extrusion?

[...] According to Josef and Tom that print looks perfectly acceptable. "C'mon, it's FDM printing" - Thomas SanlandererJP doesn't say the result is acceptable anywhere in the interview. He says an article detailing the issues if forthcoming. He states that they've narrowed down the issue to drive gears and are working on a fix. When the fix is ready, they'll issue it. He notes that it's something that if you look for it, you will find it, and that other factors are often mis-diagnosed as the same issue.

i dont now if you can fix the wrong bore tolerances on those bondtech mini gears in software. some people have reported that theirs are not machined correctly and have wrong bore diameters, which causes the drive gears to run not true on the stepper motor axle. prusa mentioned an issue with the cut of the driving teeth as well, i sense we will have to replace our drive gears all together. bondtech charging 50 money units for a set is robbery considering their crappy quality control.

Re: Any response from Prusa on the inconsistent extrusion?

[...] i dont now if you can fix the wrong bore tolerances on those bondtech mini gears in software. some people have reported that theirs are not machined correctly and have wrong bore diameters, which causes the drive gears to run not true on the stepper motor axle. prusa mentioned an issue with the cut of the driving teeth as well, i sense we will have to replace our drive gears all together. bondtech charging 50 money units for a set is robbery considering their crappy quality control.This is what bugs me about everybody dogpiling on Prusa. If the root cause is, indeed, an assembly produced by a 3rd party that's used in other products, the manufacturers of those other products are going to benefit from work that only Prusa is doing. The cheaper firms can just incorporate fixes without contributing back. Yeah, it sucks that there's a cosmetic issue that may bug some people. It's great that Prusa is fixing it. They've also acknowledged the issue, contrary to some of the histrionics. Whatever they find, they'll be contributing back to the 3D printing community at large without compensation. There's not much more they can be expected to do. They're doing exactly what everybody who crows about open source wants. It just takes time.

If it's a bondtech issue, I'd expect bondtech to make it right, at least to some degree. I suspect there will be a work around requiring replacing some parts. I doubt there's any feedback sensor in the mechanism, so it would be hard to compensate. Prusa's team is pretty clever, so we'll see. It would be awesome if they came up with a fix that we could self-print until repair parts are available.

For all the grief Prusa is taking on this, watching them address the issue is making me damned glad I bought a Prusa. It sucks they don't have it fixed already, and yeah, it would be nice if JP would respond personally to every complaint, but I have to assume they're busy doing stuff like fixing problems. With many other brands, there would be no response whatsoever from the manufacturer. So back to the OP's question that started this thread: Yes, there has been a response from Prusa. More information is forthcoming.

Re: Any response from Prusa on the inconsistent extrusion?

Contact technical help.
They will ask for a video and tell you to read the manual.
Not interested.

Re: Any response from Prusa on the inconsistent extrusion?

It's great that Prusa is fixing it.

Do you know something I don't?
All I know is they are preparing a blog post about the issue.

Re: Any response from Prusa on the inconsistent extrusion?

This is what bugs me about everybody dogpiling on Prusa. If the root cause is, indeed, an assembly produced by a 3rd party....

What bugs me is if that's the case Prusa didn't do his research. Also, this seems to be an issue with this extruder. Other official Bondtech extruders work fine.