Missing Layers

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88 comments

  • Avatar
    Nathan Toews

    well the first disc used 130mm across the board and a 40% target which should be over kill. the second disc used 150mm start, 150mm max 100mm short and a 30% target.

    so in theory if its not hardware there should be some form of noticeable difference. but honestly to the human eye they are identical. 

    i have watched it print the tower and fully purge, nice clean color. go over and print the internal perimeter nice and clean, and as soon as the outer perimeter goes past the adjacent color boom its contaminated. 

    so either its hardware related or something I'm doing wrong in S3D causing my filaments to maybe get to close? i already have my extrusion multiplier at 0.95. don't really want to go lower.

  • Avatar
    Nathan Toews

    i don't work for mosaic so i can only speculate, but i think the pauses aren't a bug. i think a lot of printers had issues with good pinging so they added a pause to the firmware to force better results. i could be completely wrong on this though

  • Avatar
    Kurt Skauen

    @Nathan

    I don't think they add explicit pauses. But they flush the pre-planning buffer. Which on some printers can cause small pauses. I would not think it could generate a full second pause though. And it is only supposed to happen while over the purge tower, so not before leaving the model.

    @Ramon

    Are you using the official HUB or a more powerful Pi? When I was doing performance tests with the Pi Zero, some objects would generate 1s and longer pauses that would not be there when printing from SD or with a more powerful Pi.

  • Avatar
    Nathan Toews

    @ kurt

    that's a good point. i completely miss read the part where he says that its pausing before moving to the tower. my bad. im using the official hub without that issue. but i have on some prints trying to print to fast been able to provoke some buffering issues. so i would agree using a pi 3 would be much better. 

  • Avatar
    Nathan Toews

    completely took apart and rebuilt my extruder with spare parts i had kicking around. did a quick bleed test. forgot i had retractions off so pardon the strings. and now ill have to re calibrate my palette2 because this new extruder is performing differently...

  • Avatar
    Kurt Skauen

    @Nathan

    The long pauses (some way more than 1 second, which is really odd and hard to explain) was only on certain objects. But IIRC, objects that triggered it would always trigger it at the same spots on the object. Printing the same object with a Pi 3B would be silky smooth.

  • Avatar
    Ramon Schweizer

    Hi Kurt

    I bought the Raspi Mosaic offered for Palette2 Pro ("Add CANVAS Hub - $79 USD")

    So far I didn't face in this behaviour. That's why my guess of the Firmware.
    I never recognized stops, and believe me, I take notice of every detail during printing. :-)

    And, to be honest: Why should I have bought the HUB and now I shall fade to SD?

  • Avatar
    Nathan Toews

    Hi ramon
    Hes not telling you to switch to SD. The canvas hub. Whitch I'm also using only has a pi0. It works but it's slow and has its limitations. Hes just saying that if we just upgraded to a pi3b we would get much better results. Or at least take out the chance of that being the problem.

    To be honest I dont know why I havnt done it yet. All my printers have a pi3b on them now. When I bought the palette2 I didnt have any yet so I just ordered the hub to make life easy.

  • Avatar
    Ramon Schweizer

    So finally I got it.

    I installed de PI3, and now all is very very smooth without any further issue. No stops, and with the S3D flag (in current version) it works as expected ... perfect :-)

    So, conclusion: Upgrade to PI3, and make the S3D setting, set the S3D retraction distance and print tith wit "x" colors (Extruders) and the result is flawless.

    Thanks for all in here, for the great help and support

  • Avatar
    Nathan Toews

    hey Ramon

    just tried the extrusion zeroing check box looks like it works you right. but does chroma give you an error saying that tool change retractions are not set to zero even though they are? it seems to process the file just fine just curious if your also getting that.

    also heres my 3rd print after fixing all my stuff. so close to perfect. there were some low pings for no apparent reason so im going to upgrade to a pi3 as well and hopefully i dont get that anymore... kind of ruined a 31 hour print. oh well.

  • Avatar
    Kurt Skauen

    @Ramon

    The multi-second pauses are a bit puzzling. The overall slow-down of the print, and the stuttering that is inherent to the cause of the slow-down is obvious. But why it periodically decide to just stay there twiddling thumbs for a few seconds I'm not so sure. And it was already so bloody obvious that the Zero was a no-go for Octoprint that I have not bothered digging any deeper to figure out exactly what is going on. The long pauses only happens on some objects. But I don't know what was special with the objects that triggered it versus the ones that didn't.

    It totally boggles my mind that Mosaic is still selling the Hub with a Zero in it and even fight tooth and claw to defend it against the ever mounting heap of evidence and customer reports that it does not work. What can make them think it is worth inducing so much suffering and pain on their customers?

  • Avatar
    Ramon Schweizer

    @Nathan

    It's a shame :-( looks perfect until ... yes ... you kno

    Because de warning from chroma:
    In S3D you must deactivate the "Tool Change" retraction distance settings. Zero the fields, except the speed.

  • Avatar
    Ramon Schweizer

    @Kurt

    I totally see your point and I know how hard a political fight can be :-)

    Nevertheless there is at least a workarround. So I hope we did here a help for any solution looking customer :-)

  • Avatar
    Nathan Toews

    well just thought id post here. i solved the problem i had with misreading pings. only to discover a new limitation for Chroma...

    i switched out to accessory mode with movement pings and my pings became spot on. i printed a single print over 60hours without a single mistake... and then well chroma did some strange stuff. it made my print start to look for pings on every single movement in the tower. not every layer or so like normal. literally every line layed down.

  • Avatar
    Nathan Toews

    oops didn't mean to click submit yet.

    anyways looks like chroma can only processe so much gcode. it caused all sorts of missed pings and bleading. and made the tower look like crap.

  • Avatar
    Nathan Toews

    67 freaken hours down the tube and a lot of filament...

  • Avatar
    Jonny Yeu

    Hey Nathan, we're really sorry to see that as the print was looking great up to that point. Could you please share your print files with us? We haven't seen this issue in the past, so please send these to support@mosaicmfg.com and we'll take a look to see why this is occurring. 

  • Avatar
    Nathan Toews

    Hi Jonny,

    ive emailed every file i could think of to that email. hopefully something their makes sense. it be "great" if it was a mistake on my end. but to be honest im getting tired of failed prints with this thing... many months of work and i still have nothing to show for it

  • Avatar
    Jonny Yeu

    We'll take a look and see if we can find anything. We don't think it's a Chroma issue as we have seen users who have completed larger prints in the past.

    Which filament are you using for this print? Are the Splice Tuning settings adjusted between these filaments?

  • Avatar
    Nathan Toews

    yes splice tuning is set for my filament, palette2 is calibrated for these 4 rolls. its MG Chemicals PLA 

  • Avatar
    Jonny Yeu

    What are you splice tuning settings? Also, could you please re-send the files as we haven't received them in our inbox yet.

  • Avatar
    Nathan Toews

    how do i view my splice tuning settings without redoing them. i went to preferences and about but i don't see the values anywhere.

    also i have re sent the email to support@mosaicmfg.com 

  • Avatar
    Nathan Toews

    also side note its not the splice tuning causing this issue. as i can see the problems in the gcode preview.

  • Avatar
    Jonny Yeu

    Hey Nathan, you can find the Splice Tuning settings within Chroma in the Material Profiles (http://mm3d.co/p2splice-tuning). Chroma will then pull these values and apply them to your print files.

    Thanks for resending the e-mail, we'll take a look at the files once received.

  • Avatar
    Nathan Toews

    ok sorry i thought we were talking about the tuning on the palette2. mine is set to default PLA and if i click edit all the value are 0. but i still don't think its that as the first 60 hours of printing went down without a hitch. and the issues are present in Gcode preview.

  • Avatar
    Jonny Yeu

    Thanks for clarifying. I do apologize as we still haven't received any messages with your files. Could you please try jonny@mosaicmfg.com?

  • Avatar
    Nathan Toews

    Ok i forwarded the original message to your email.

  • Avatar
    Jonny Yeu

    Got it, thanks! 

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