RE: VFA Artifacts on X+Y Straight Edges
Make sure to leave a comment on the github issue. Keep it warm!
This issue was due for firmware 6.3.1, but pulled due to memory issues. Usually in software development, you don't drop an issue because it's hard, you assign more resources to it.
RE: VFA Artifacts on X+Y Straight Edges
Make sure to leave a comment on the github issue. Keep it warm!
This issue was due for firmware 6.3.1, but pulled due to memory issues. Usually in software development, you don't drop an issue because it's hard, you assign more resources to it.
Yes, it was scheduled for 6.3.1. And then they pulled it at short notice. And then they did not follow up with another Core One release, but with a completely separate release for the other printers. And then they did follow up with 6.3.2 for the Core One, which was just a trivial fan RPM change. And now there is not even a tag in Github for any future firmware release.
I have posted in the Github thread a couple of times, and I have pinged @jan-kratochvil (apparently the product manager for the Core One) here a week ago. No response, of course. Prusa's processes and communication are pretty sad.
RE: VFA Artifacts on X+Y Straight Edges
They do different firmware releases for different printers. That's nothing uncommon. Core One always had separate releases.
Prusa's processes and communication are pretty sad.
What would be different if they repeat "we are working on it" every week? Software and especially hardware development is tricky. You never know what issues you will be facing. If they give estimates that they will not fulfil, they will have a lot of disappointed customers. It's better to follow strategy of making no promises. When they will finish it, they will let us know. Until then there is nothing to say.
RE: VFA Artifacts on X+Y Straight Edges
What would be different if they repeat "we are working on it" every week? Software and especially hardware development is tricky. You never know what issues you will be facing. If they give estimates that they will not fulfil, they will have a lot of disappointed customers. It's better to follow strategy of making no promises. When they will finish it, they will let us know. Until then there is nothing to say.
I beg to differ. What's wrong with "the next release will be for the Core One again, we are focusing on that now. Phase stepping calibration is already working reliably in the lab." Or "we are now working on unifying the MKx and Core One versions; that's a bigger effort so the next release will take a bit longer."
As things stand, I am beginning to doubt that Prusa will ever get the phase stepping calibration to work. Maybe the microcontroller is at its limits, or maybe there are factors playing into the measurement which they can't get a handle on. And since the 60-day window for returning my printer will soon be closing, the "when they finish, they will let us know" approach does not work for me.
RE: VFA Artifacts on X+Y Straight Edges
What would be different if they repeat "we are working on it" every week? Software and especially hardware development is tricky. You never know what issues you will be facing. If they give estimates that they will not fulfil, they will have a lot of disappointed customers. It's better to follow strategy of making no promises. When they will finish it, they will let us know. Until then there is nothing to say.
I beg to differ. What's wrong with "the next release will be for the Core One again, we are focusing on that now. Phase stepping calibration is already working reliably in the lab." Or "we are now working on unifying the MKx and Core One versions; that's a bigger effort so the next release will take a bit longer."
As things stand, I am beginning to doubt that Prusa will ever get the phase stepping calibration to work. Maybe the microcontroller is at its limits, or maybe there are factors playing into the measurement which they can't get a handle on. And since the 60-day window for returning my printer will soon be closing, the "when they finish, they will let us know" approach does not work for me.
Are you going to return the printer if there is no update/new firmware ?
RE: VFA Artifacts on X+Y Straight Edges
Are you going to return the printer if there is no update/new firmware ?
I am still on the edge... I am unhappy with the print quality I can achieve in parts that will be looked at, like enclosures. (Which I expect to represent roughly half of the objects I print.) With the really nice and consistent layer structure, it's a big disappointment that the printer cannot control XY positioning better.
But what better alternatives are there? I really dislike Bambu's business model, am not sure whether the P1S or X1C will really perform better, and the H2D is outside of the hobby budget I can justify. I have tried the "it's cheap, be prepared for some compromises and no support" approach of the second-tier Chinese companies and have been disappointed. And I don't think I am prepared to dive into the bare-bone, "you are on your own" designs like the Voron or RatRig -- 3D printing is a means to an end for me, not a hobby of its own.
So I might hang on to the Core One for lack of a better option -- until eventually something proven-to-be-better comes around in my budget range.
RE: VFA Artifacts on X+Y Straight Edges
I am unhappy with the print quality I can achieve in parts that will be looked at, like enclosures.
Which filament are you using? Is filament with carbon an option for you? It is now available from many manufacturers and the surface simply looks great.
I have already used Iemai PCCF or Eryone Petg CF. The parts look really great.
A hardened 0.6 nozzle would be recommended. But it also worked with 0.4.
I personally think that any printer with a belt can produce such a surface. It is still a mystery to me why the same devices produce different results. If it were easy or cheap, the manufacturers would have eliminated it long ago.
RE:
Which filament are you using? Is filament with carbon an option for you? It is now available from many manufacturers and the surface simply looks great.
I have already used Iemai PCCF or Eryone Petg CF. The parts look really great.
A hardened 0.6 nozzle would be recommended. But it also worked with 0.4.
I personally think that any printer with a belt can produce such a surface. It is still a mystery to me why the same devices produce different results. If it were easy or cheap, the manufacturers would have eliminated it long ago.
Thank you for the suggestion. I have not tried any CF filament yet, but if I make up my mind to keep the Core One I will order some extra nozzles, build plates and filaments and give it a try!
The PLA Galaxy Prusament which I ordered with the printer kit is quite nice and forgiving too, when printed with a matte surface. Unfortunately my current pet project (a vintage arcade replica idea) calls for glossy & sparkly filament, which makes the belt ripple pattern quite visible.
I have also wondered whether the belt ripple is essentially due to the fact that 3D printing pushes those drive belts into precision requirements which they were just not made for. Due to the repetitive pattern in the prints, we can probably see nonlinearities in the XY movement which amount to 1/100 of the belt tooth pitch, or even less.
Nevertheless I find it baffling that neither hobbyists nor manufacturers have come up with targeted ways to diagnose the source of ripple in a specific printer. One would think that microphones, vibration or optical sensors, or what-have-you would allow us to pinpoint where the irregularities creep in, and then potentially take targeted measures to reduce them. But from what I have found on the internet, everyone is still taking stabs in the dark -- nudge a belt position here, try a different idler there, overtighten the belts, try stepper motors with smaller steps, ... -- and it sometimes helps, sometimes doesn't.
RE: VFA Artifacts on X+Y Straight Edges
.....Unfortunately my current pet project (a vintage arcade replica idea) calls for glossy & sparkly filament.....
Then of course this tip won't help you 😊
But maybe this one will 😉 If you're looking for consistently beautiful walls, I would prefer the Orca Slicer. Exceptionally, otherwise I use the Prusa Slicer for everything and hope that it will be implemented there.
There is a setting there not to slow down the outer walls if the layer time is exceeded.
This not only helps to stay in the best range for the VFA but also eliminates the differences that can be attributed to different printing speeds.
Unfortunately there is no working profile for the Core One yet but with the help of a script you can convert profiles from Prusa Slicer, Super Slicer and Orca.
RE: VFA Artifacts on X+Y Straight Edges
.....Unfortunately my current pet project (a vintage arcade replica idea) calls for glossy & sparkly filament.....
Then of course this tip won't help you 😊
But maybe this one will 😉 If you're looking for consistently beautiful walls, I would prefer the Orca Slicer. Exceptionally, otherwise I use the Prusa Slicer for everything and hope that it will be implemented there.
There is a setting there not to slow down the outer walls if the layer time is exceeded.
This not only helps to stay in the best range for the VFA but also eliminates the differences that can be attributed to different printing speeds.
Unfortunately there is no working profile for the Core One yet but with the help of a script you can convert profiles from Prusa Slicer, Super Slicer and Orca.
There is a working profile for OrcaSlicer, i'm currently using it.
It was created by bwees: bwees
And now included in the latest nightly
RE: VFA Artifacts on X+Y Straight Edges
.....Unfortunately my current pet project (a vintage arcade replica idea) calls for glossy & sparkly filament.....
Then of course this tip won't help you 😊
But maybe this one will 😉 If you're looking for consistently beautiful walls, I would prefer the Orca Slicer. Exceptionally, otherwise I use the Prusa Slicer for everything and hope that it will be implemented there.
There is a setting there not to slow down the outer walls if the layer time is exceeded.
This not only helps to stay in the best range for the VFA but also eliminates the differences that can be attributed to different printing speeds.
Unfortunately there is no working profile for the Core One yet but with the help of a script you can convert profiles from Prusa Slicer, Super Slicer and Orca.
There is a working profile for OrcaSlicer, i'm currently using it.
It was created by bwees: bwees
And now included in the latest nightly
I really wanted to test that feature a few weeks back and was disappointed there still isn't a core one profile in the latest stable release.
Hope to god this feature gets moved across to Prusaslicer, as I really can't be bothered with nightly builds.
Is it a new feature in Orcaslicer?
RE: VFA Artifacts on X+Y Straight Edges
New Firmware 6.3.3 just got tagged on Github, looks like they enabled phase stepping finally.
RE: VFA Artifacts on X+Y Straight Edges
Ok looking at the commits it looks like they reverted it again, so still no phase stepping...
RE: VFA Artifacts on X+Y Straight Edges
From that reverted commit:
Revert "Enable phase-stepping menu for CORE One" Results are still not satisfactory, better hide this again. OOMs are fixed, but sometimes the calibration tries to improve motors that are already good and fails. Sometimes, retry helps. We need some better heutistics for such cases, but we don't have enough battlefield data and don't want to bother user with mixed signals.
RE: VFA Artifacts on X+Y Straight Edges
I've hooked up my OctoPrint server to my CoreOne, tried to send gcode M1977 to the machine and it prompted the calibration screen:
I'm waiting for my acellerometer and the link doesn't work to https://prusa.io/coreone-phstep
If the calibration were to succeed ok, if it works on some machines some times, does it mean we have could have custom phase stepping?
The commit is only for the meny option?
RE: VFA Artifacts on X+Y Straight Edges
They should release an Alpha Firmware for those who want to help and give feedbacks.
RE: VFA Artifacts on X+Y Straight Edges
They should release an Alpha Firmware for those who want to help and give feedbacks.
Yep.. I'd have no issue to test around and encounter bugs. Since I'm in a rented apartment, I don't want to break the little piece for custom firmware though.
RE: VFA Artifacts on X+Y Straight Edges
What do you think? Maybe this issue is really caused by belts..
https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4557#issuecomment-2766762271
RE: VFA Artifacts on X+Y Straight Edges
What do you think? Maybe this issue is really caused by belts..
https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4557#issuecomment-2766762271
I seem to recall some folks having picked up some Gates GT2 toothed idler pulleys but were missing the CoreOne idler pulley block model to resize for the slightly wider pulley. Anyone know what happened to that effort?
RE:
What do you think? Maybe this issue is really caused by belts..
https://github.com/prusa3d/Prusa-Firmware-Buddy/issues/4557#issuecomment-2766762271
I seem to recall some folks having picked up some Gates GT2 toothed idler pulleys but were missing the CoreOne idler pulley block model to resize for the slightly wider pulley. Anyone know what happened to that effort?
I've already modeled the replacement part and have the pulleys. I had to remodel the part using the Prusa STL as a template because the geometry was too complex to easily modify the stl. I had about 5 hours into that. Now just waiting on my core one.
I did this on my XL and it made no difference, so I don't imagine it'll make a difference here. I'll do a test print, measure the belt tension, then change the pulley match the tension and print the test part again.