Calibration Print Troubleshooting

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    Eric Kelly

    canvas didn't even slice the bottom color portion properly, it only did 3 splices despite the color view showing the color at the bottom the preview after slicing does not.....  after splice 3 it errored with no pings detected.... but there were 6 in total..... the print finished with the last transition being late by 2 layers.... but i can't rate it due to the "no pings" error.   seems canvas is too buggy.

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    Sbsimp1

    I also have a problem with the bottom center color not showing after slicing in Canvas. I tried using Safari v.12.02 on a Mac (macOS Mojave v. 10.14.2) and Chrome Version 71.0.3578.98 also on the same Mac. I then tried Edge on a PC. All with the same result - No center color on the sliced model. 

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    Eric Kelly

    i guess chroma is the only way, canvas is probably 6+ months away from being useful.  when i started this print it also started at 170c instead of 250c that i put... it's just not ready for any serious usage. 

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    Paul McMaster

    I'm also experiencing the slicing of the bottom problem, and the no pings. I run connected mode on a cr10

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    Sbsimp1

    I switched to using Chroma with Slicer PE. My first Calibration Print did not quite finish, so reset the Palette2 again and calibrated the Palette 2 Pro. The next calibration print was acceptable. The transition was a little underloaded, but since all else was good I have moved on. The Multi-Color Earbud Case is on the printer now. 

    I think I like using Chroma better than Canvas at this point. It allows me to use the slicer and settings I am most comfortable with and convert that to files for the Palette 2 Pro.

    I'll give Canvas another try in a month or so when some of the options available in Chroma are added to Canvas (like infill transitioning).  

    Hooray for vacation - because I have been at this for 7 hours so far today. :-) By New Year's Day I hope to be an expert. 

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    Eric Kelly

    My guess is you'll have better luck trying with linear advance turned off,   i can see it calibrating based on one print then being off on the next since the extrusion rate is entirely dynamic... maybe.

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    Eric Kelly

    turns out my calibration print was spot on for 0.3mm layers anyway so i started a larger model and it's perfect so far.... 

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    Korey MacGill

    ok. let me see if i get this right.

    1. incomplete print. - increasing my bowden tube length from 570 to 585. a little extra never hurt no one.

    2. my pinging is happening on the model and the tower both, not just the tower, so i'm going to switch on "use movement pauses for pings. which just moves it back and forth?

    3. i'm underloaded on the transition. so... i need to wait longer before i stop feeding plastic to the nozzle? do i have that right?

    going to adjust and redo... again. haha this is definitely the more frustrating part about calibration. BUT i'm still super impressed with my unit. what it does is awesome. its just a hastle to interface it well.

    uploading pics too. @mosaic team let me know if i'm missing anything.

     

    i think i'm around 50%:

     

     

    and i'm ALMOST done. probably don't need to increase by 15 mm but heck, why not.

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    ken

    Brilliant! My Creality Ender 3 with Direct Drive extruder mod and BL Touch now has an awesome new trick! Multi-color prints! Calibration was not so bad and the results are amazing. I still plan on going through the extrusion calibration again since I think I might be over extruding just a bit.  Time will tell if it works this well on one of my homemade models, but if it does... best. purchase. ever. Fantastic integration with OctoPi!

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    Simon Young

    After several attempts I got the dual colour keychain printing well (see below) , so as recommend I moved to the ear bud and it was a complete disaster (see pic 3), yes the model printed, but the colours are all mixed up and some how the printer finished before the pallete, so it was just sitting there waiting I had to hit stop on the touch screen. Was about 1m of spliced filament waiting to be fed into the extruder. Was suppose to be 33 pings, but only got to ping 24, but all missed after ping 6 but pongs all around 100%.. How can it go so wrong.. I only seam to be able to successfully print the calibration keychain. Everything else I try fails.. Using Canvas to slice as per the calibration instructions. And printing via ocoprint (Canvas hub)

     

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    ken

    I had/have the same issue. From what I can tell, my Ender 3 is not feeding at a consistent rate.  I calibrated it once and thought it to be perfect, but now it is out of whack.  I command 100mm of filament to be printed and it only extrudes 64-67mm.  Sounds like what you are up against as well since you have so much leftover spliced filament. I dont understand why the keychain prints so well (mine does too) but maybe its less of a factor with 2 colors vs 4.

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    Benoit Valin

    This problem has been extensively reported here, to my knowledge it hasn't been resolved. you can read the thread here.

    I get amazing 4 colour prints, no confusions, just consistent failing on the earbud holder.

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    ken

    Wow, those are nice prints, Benoit!  Tonight I rolled up may sleeves and tried to figure out my issues. The first problem with the feed appears to be the spring on my extruder was weak. I replaced it and now I get a proper amount of filament.  I then had an issue where the extruder appeared to feed too fast, so I will adjust that in software.  With that all taken care of, I took another crack at the earbud holder. It was all going to plan up until 94% when I had the filament break at a splice! Almost had it!  So I am trying again with my fingers crossed. Normally my splices are quite solid. I did find a chunk of filament in my buffer area that I am not sure how it got there. Hopefully that was it and this second print comes out fine.

    Since I have not printed in several weeks, I have also updated the Palette2 firmware and re-sliced the earbud holder with the latest Chroma and printed directly to my OctoPi (which I also updated as well as the Raspberry Pi OS).  So I am up to date on everything as of 5-27-2019.

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    ken

    It finished. My first successful 4 color print!

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    Benoit Valin

    Wow, it's amazing ! 

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    ken

    Thanks! There's a little bit of a blue hue to the white, but I am honestly not surprised. It would probably take some serious wiping to prevent the contamination of white from the residue in the nozzle. I'm happy with it. I hope everyone else can get similar results with the latest Chroma and firmware.

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    Benoit Valin

    Ah, I've never used Chroma, always used canvas.io, i'll try it over the week end.

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    ken

    Disregard... I'm an idiot. I meant Canvas.  I have tried Chroma once, but not for this model. I need to try it again as I was having the feed issues previously when I tried it.

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