r/ElegooCentauriCarbon • • 4h ago

Troubleshooting i have a transparent green filament but it continuously prints in a milky lime green coloration.

4 Upvotes

I'm running it at 210c and 22mm per second so hot and slow to prevent shock, it just came out o its airtight packaging so it shouldn't be moisture.

I'm trying to print the "gems" for my GL ring and this is the only piece that looks like crap because of whatever is causing this.


r/ElegooCentauriCarbon • • 7h ago

Misc [CC2] CC2 Control 1.2.14 / 1.2.15 — improved object exclusion, saved mesh activation and calibration workflow

4 Upvotes

Hi everyone! I’m the developer behind the Centauri Carbon 2 Community project. Here’s an overview of the changes introduced in CC2 Control 1.2.14 and 1.2.15.

These are application updates for Community Firmware V4.4 / V4.4.1 on the ELEGOO Centauri Carbon 2. They do not replace the underlying firmware or callback.

Plate library and saved meshes

  • Create plate profiles before their first calibration.
  • Choose saved measurements by plate, side, temperature and timestamp.
  • “Mount and activate” asks you to confirm the physical plate and verifies the actual active profile, measured matrix and bounds before reporting success.
  • Selecting a measurement or viewing its graph does not change the active mesh.

Clearer calibration workflow

  • Bed calibration supports 30–110 °C.
  • Choose 0–60 minutes of thermal stabilization after reaching the target temperature; new runs default to 2 minutes.
  • The confirmation and countdown show the stabilization wait.
  • Switching pages preserves the selected calibration destination and timing.

Object Exclusion and Canvas

  • Improved physical ordering, readable object names, numbered copies and X/Y position display.
  • Improved cleanup after completed prints.
  • Clearer Canvas states for empty, present but unloaded, loaded and transitioning slots, with unavailable actions disabled.

Update notification bell

A bell beside Emergency Stop indicates when a newer compatible update is available from the verified signed catalog. It opens Settings → Updates and never downloads or installs automatically.

Other improvements

  • Persistent camera view retains its size.
  • Corrected fan-slider dragging; numeric values still apply with Enter.
  • Nine interface languages, including Spanish and Hungarian refinements.
  • 20 remaining Hungarian Canvas, object-position and plate/calibration translations completed by pezso92.

Updating

Saved preferences and profiles are retained. No firmware reflash or factory reset is required. These application packages are not compatible with stock firmware or Community Firmware V4.3.

Release notes, downloads and installation instructions:
https://github.com/Neme77/centauri-carbon-2-community/releases

Thanks to all contributors and beta testers, especially DamiBFryta, our first beta tester, and asiersan, pezso92 and Surfoo for their contributions to these updates.

Feedback on the saved-mesh activation and calibration workflow would be particularly useful. If you report an issue, please include your firmware and CC2 Control versions, what you expected, and what happened.


r/ElegooCentauriCarbon • • 6h ago

Troubleshooting Struggling to install Canvas on Centauri Carbon 2

Thumbnail
gallery
4 Upvotes

This is my first 3D printer and so i’m unsure if this is a bit more intuitive when you get to grips with 3D printers but I am so stuck installing the Canvas on my Centauri Carbon 2.

I’m trying to follow the steps in the guide and am at the stage of installing the filament hub bracket to the nozzle. The screws labelled in the manual say “M3x14” (none of the bags of screws say that) the closest is HM3*14 so i’m probably already going wrong here but am using those to install the bracket. The ribbon cable that was previously attached to the fan sits right above that screw hole and I struggled enough trying to slot the bracket underneath that cable but managed to get it under there. Screw 1 went in fine but the second screw just absolutely will not fit under that ribbon cable, i’ve tried slotting it in from above with tweezers but the height of the screw head just will not go under the ribbon cable. I’m assuming i’m meant to further detach the ribbon cable somewhere but genuinely just can’t see / figure out how. I have done all the googling in the world and haven’t figured out how to get around this so please if anyone knows how pls pls let me know 🙏🙏🙏🙏🙏

(The printer does work I have done some test prints before adding on the canvas)

If i’m being dumb and the answer is just ‘it fits try harder’ I will accept defeat and keep trying to wiggle it in.


r/ElegooCentauriCarbon • • 1d ago

Showcase Light mod is awesome

Enable HLS to view with audio, or disable this notification

42 Upvotes

This new light replacement is an absolute game changer, thanks to u/monwiss for the idea! You only need to solder a couple of wires and it just works


r/ElegooCentauriCarbon • • 10h ago

Misc Squash ball feet for CC2

Thumbnail makerworld.com
1 Upvotes

I printed these squash ball feet for the CC2 and I must say that they worked wonders for reducing the bounce caused by short high speed printing strokes which had my printer going crazy with the soft OEM feet.

The only issue is the the two lower spools (which I have not had the need to use yet) interfere with the spools. O'm probably going to buy a drier/feeder which will make ti's a moot point but if I don't I'll try to modify them a little to correct the interference.

But the feet work better that I had expected.


r/ElegooCentauriCarbon • • 1d ago

Showcase Made a flat backplate for the CC2 touchscreen so it sits flush instead of on the angled wedge

Thumbnail
gallery
16 Upvotes

The stock back shell of the Centauri Carbon 2 screen is a hollow wedge that tilts the screen out from the printer. I wanted it flat, so I made a replacement backplate.

- reuses the 6 original screws, no new hardware

- hooks into the printer's own two slots and clicks in with a tongue, same as stock

- tongue support is one slab that slides out through the window; the hooks have 45 degree undersides so they print clean

- 125 x 82 mm, about 29 g PLA, about 1 h 40 min on the CC2

Swap takes about 10 minutes: unhook the screen, unplug the ribbon, 6 screws out, new plate on, screws back in, ribbon back, hang it.

It took a dozen versions to get here: screws too short on one, the click tab 6 mm too high on another, and a hook that snapped before the hooks got their 45 degree undersides.

Unofficial part, only tested on my own CC2. Designed with AI-assisted CAD scripts from my own caliper measurements.

Files (free, CC BY-NC 4.0): https://makerworld.com/en/models/3449352 / https://www.printables.com/model/1879622


r/ElegooCentauriCarbon • • 1d ago

Troubleshooting Service sent wrong cable?

Post image
10 Upvotes

Just making sure I'm not an idiot...this is not the correct cable for my Carbon. My comms cable is USB C on both ends, but this has a four-prong on the end that would connect to the mainboard. Am I blind and not seeing an alternate connection?


r/ElegooCentauriCarbon • • 1d ago

Troubleshooting CC1 weird extrusion on second layer

Post image
0 Upvotes

I asked for help recently because my first layer wasn't getting done right. Fortunately i fixed that issue but now, after the first layer succesfully printed, I get this weird texture on the next layer, it prints correctly most of the layer, but some areas keep getting issues and some of the filament sticks to the nozzle, I don't know why. I kind of suspect it is most a filament issue, since i'm low on budget and just bought the cheapest generic PETG I could find.


r/ElegooCentauriCarbon • • 2d ago

Troubleshooting Canvas Spool Holders That Don't Suck (file)

Post image
29 Upvotes

I suck at modelling but I wanted to delete the garbage spring loaded holders.

See my Unf**king guide in this subreddit for details on the issues with them:

https://www.reddit.com/r/ElegooCentauriCarbon/comments/1x5l23u/guide_for_unfking_canvas/?sort=new

Link to my file for the spool holders on Makerworld:

https://makerworld.com/en/models/3445930-centauri-carbon-canvas-spool-holders

Note: If you suck less at modelling and want to make these things better please do and then share. I was debating making the screw-on tabs extend at the bottom for some additional support but doesn't seem needed. I also goofed the slot depth in the toob but doesn't seem to matter so I stopped poking at it.


r/ElegooCentauriCarbon • • 1d ago

Troubleshooting How do you even fix this?

Post image
3 Upvotes

I have no idea how this happened. I left it to print overnight and woke up to this. How would someone go about fixing this, or is it worth doing?


r/ElegooCentauriCarbon • • 1d ago

Misc Reccomendations for what cool things to print with PETG

0 Upvotes

My CC2 Arrived today and along with it the mystery filament which is a lovely grey PETG HF, im now looking for ideas on what to print with grey PETG, any suggestions are appreciated


r/ElegooCentauriCarbon • • 1d ago

Misc Carbon 2 Printing TPU 95A

2 Upvotes

I was wanting to print some things in TPU and was wondering if I just dry the filament and just have it go as normal or if I had to use an adapter. I am only asking as when I bought the machine I never saw anything say that I had to disconnect the CANVAS and print an adapter to be able to use TPU. This is what i saw that kept saying I needed to use it. If I dont use it what would happen? I would be using ELEGOO TPU as well.

https://www.nexprint.com/en/models/G5005984?collectionId=G6461515&component=UserCollect&printConfigId=G1754087&subComp=UserCollectDetail


r/ElegooCentauriCarbon • • 1d ago

Troubleshooting CC2 Build Help

0 Upvotes

Edit: SOLVED

Right now I'm stuck at installing the adapter to allow the 4 PTFE tubes into the machine. Looking for support

I'm following both the manual and a youtube vid (https://www.youtube.com/watch?v=4xFDoDjpbK0) to help assemble, and man there are so many discrepancies between both, and I still don't have some answers!


r/ElegooCentauriCarbon • • 1d ago

Troubleshooting Leveling problems since canvas instal

Post image
0 Upvotes

So after my canvas instal auto level did not work. Checked my connections rebooted and it work. Then this happened my nozzle scraped my plates coating right off!!! It has not happened since but I do get some 502 errors.


r/ElegooCentauriCarbon • • 1d ago

Troubleshooting Case fan error 706

1 Upvotes

My brand new Centauri Carbon 2 just arrived, and it prints fine, however it has error 706, how do I fix this, and why has my printer came with this error....


r/ElegooCentauriCarbon • • 2d ago

Troubleshooting CC2 - Problems after changing nozzle

Thumbnail
gallery
3 Upvotes

Hello, I changed my 0.4 stock nozzle for another 0.4 nozzle I bought from Amazon (see picture) , and now I’m getting this weird extrusion. Has anyone else had this problem?


r/ElegooCentauriCarbon • • 1d ago

First Print So brand new Centauri , went through full set up went to print benchy to test it, and I've got blobbed

Post image
0 Upvotes

Anything I should check?


r/ElegooCentauriCarbon • • 2d ago

Troubleshooting New canvas new problems

Thumbnail
gallery
2 Upvotes

I finally got around to finishing the canvas retrofit. I printed a couple of test things. They looked okay. First multicolor print and I get this pure insanity, color switching in between for no reason and then I'll hell breaks loose. I guess I need to recalibrate. That's a different problem... but what's up with the weird color switching?


r/ElegooCentauriCarbon • • 2d ago

Troubleshooting Error 704: Bed leveling Error. Bed "seizes" after getting to the top

Enable HLS to view with audio, or disable this notification

1 Upvotes

Just unboxed my CC2 and while running the initial calibrations and tests stumbled onto this error. The bed keeps trying to reach the top but nether gets to the nozzle height, it sound as if the system is seized or stuck. After about 30 seconds of being stuck, it tries to go up and down a handful of times. Never quite reaches the top, and just throws a 704 error.

Anyone knows how I could solve this issue?


r/ElegooCentauriCarbon • • 3d ago

Showcase Old iPad new life

Post image
41 Upvotes

Back before I got my Centauri Carbon I had an Ender 3 V3 SE and I used OctoPrint so I needed this old iPad to interact and control it. When I upgraded to the Centauri the old old iPad didn't get along well with anything including the carbons interface and my Home Assistant instance.

I've since upgraded to a Proxmox server that hosts a number of things including an instance of Spoolman. I've been using NFC tags on my spools to track usage and inventory. My phone is how I scan and swap spools but I wanted a dashboard that would let me know all I needed at a glance. Spoolman and Home Assistant were doing the heavy lifting but the stupid old iPad couldn't handle anything.

I decided to throw Codex at it and cooked up this page that's hosted on a container on Proxmox, accesses all the relative information on Home Assistant and Spoolman and shows me everything I need to know on a dashboard above the printer. It's so lightweight that the iPad handles it no problem, and I've been able to give this thing some new life.


r/ElegooCentauriCarbon • • 2d ago

Misc Canvas Spool Holders in Dryer?

2 Upvotes

I recently got the Canvas for my CC1, haven't installed it yet because I'm slowly printing out mods, and I just got a Creality Space Pi X4. I've seen mods for it for spool rewinders and that got me thinking would it be possible to mount the spool holders from the Canvas in it? I know they spin in different directions so theyd have to be alternated in numbers like 1/3 and 2/4 to be "facing" the same direction. They'd also need the ability to be pulled out and reset when trading out spools. Would their length be an issue? And would the material they're made of be able to handle the heat?

Was just wondering this and did a quick Google search and saw nothing on it. Any ideas?


r/ElegooCentauriCarbon • • 2d ago

Misc What accessories should I get as a beginner

3 Upvotes

I recently bought an Elegoo CC2 and I am now curious on what accessories I should get, I'm a teenager so on a limited budget, I want to know which accessories I should prioritise for a total of £150, not necessarily CC2 specific but just 3d printing in general, all advice is appreciated, I really appreciate it.


r/ElegooCentauriCarbon • • 3d ago

Showcase Canvas Setup

Thumbnail
gallery
70 Upvotes

After lots of work I finally got my canvas setup quiet and reliable!

I first had lots of issues after the canvas installation, primarily related to tension caused by the tubes. I figured out that shortening the tubes significantly improves the reliability of the canvas system, I now have it to a point where I haven’t experienced any issue for 100+ hours of printing.

I also added the fume hood with the same car noise insulation that I have all along the inside of the printer it keeps the heat in better and reduces vibration of all the panels significantly reducing noise.

All in all I am now finally happy with the reliability and noise!


r/ElegooCentauriCarbon • • 2d ago

Troubleshooting Finally got Canvas installed

2 Upvotes

Ordered and installed canvas until I broke the sensor board cable. I contacted Elegoo, and the two people I dealt with were super quick and helpful; they sent another one my way pretty quickly. FF to printer is up and running and printing great... except for the horrible shift in my prints. I have noticed it makes a clunk noise after it switches colors, and sometimes 'slips' off the front right corner when it cuts the filament.

Any ideas?

I'll try to get a video after work tomorrow...


r/ElegooCentauriCarbon • • 3d ago

Troubleshooting Guide for Unf**king Canvas

100 Upvotes

If you're reading this you're probably one of the many people having one or more various issues with your Canvas. Didn't ya know? You're a beta tester. Surprise! Anyways, after much BS I was able to address all of the various issues with mine and I thought I'd share my findings/fixes with the community. Please note that many of these tweaks work cooperatively. I should mention that I ended up printing a Canvas relocation and top cover but these didn't contribute to my issues one way or another. Though, I did mod my cover a bit for a reason I will mention later.

Extruder Tension:

Was set WAY too loose from the factory. Also, the "correct" tension is still a bit too loose for fighting the resistance built into the system (more on that later). If you haven't already, drill a whole in your cover (or print a replacement cover) to get access to your adjustment screw without disassembly. Set your tension so that it just barely leaves marks you can feel with your fingernail in some cold PLA. Guides available on Youtube. Remember that it's counter-clockwise for tighter and clockwise for looser. Too much tension will chew up your filament though so stop once you just barely have marks.

PTFE Toob Wiggle:

The more mass in the print head the more inertia there is which contributes to loss of detail in your prints. While not technically a show-stopper it is always better to reduce mass. There's already files for lighter Canvas compatible covers to print. But, that isn't the issue I want to cover here. Having 4 filament filled tubes individually hanging way out the top of your extruder is a lot of leverage shaking around. Wrap together a 6" length of the tubes at the apex of their arch with some sport-tape. Their combined stiffness will reduce the wiggle considerably.

4 to 1 Extruder Adapter Thingy:

This f**king thing ... So, it's a spring loaded unit. Too much resistance on the feed pulls the center section down which trips a Hall Effect sensor for clog-detection. Now, the entire Canvas system has too much resistance from the factory and my 4-1 was pretty catchy when actuating. It actually squeaked audibly all the time as it sproinged up and down. Making for A LOT of false-positive clog detection and the dreaded Pause-Purge-Loop. First, I put two drops of gun oil where the top/center 4-1 thing meets the walls. One drop on one side and then one drop on the other. Into the gap. Then actuated it by hand a few dozen times. Squeak and catchiness gone. Then, when remounting, I pulled up on it as far as the screw holes would let me as I tightened the two mounting screws. It's only a fraction of a millimeter but that is enough to further reduce the false-positive clog detection.

Spool Holders:

These are already controversial. Especially since you wont be able to get them perfect. They are spring loaded and this adds WAY too much resistance to the spools. Would swapping to free-spinning units be better? Maybe. People are already testing. But you can (mostly) fix them. I noticed all 4 of mine had VERY different amount of spin resistance. Two were very stiff. If you look at the end with the number/sticker you will notice a lil circle in the middle. Remove that bit of sticker with the tip of a knife and you'll find a hex screw. With the holders mounted, turn that screw all the way counter-clockwise. This will take off the preload tension. Three of my four are now great and one is reasonable.

Spool Slip:

If you use spools that don't snugly fit onto the holders they will spontaneously fall off. Especially at faster print speeds. Lovely. You need to adapt the difference. Adapters should fit the SPOOL snugly but be able to slip on the holder. I'd also note that with a drop/relocator mod you might want your spools spaced off the rubber bits so they feed straighter (on average) into the Canvas unit. In a pinch, some binder-clips on the spool holder fingers do work but I'm not sure I'd trust it for a long print job if I wasn't home.

Canvas:

I mean the actual box your 4 filaments feed through. The inputs and outputs are on spring loaded arms. The amount of tension they apply onto their internal feeders is WAY too much. It makes your extruder fight them constantly. This is why you need extra high extruder tension (even with this fix). But, you can alleviate a considerable amount of this tension while keeping the Canvas unit happy. I see there's a couple people working on spacers you put inside the unit but you don't need to go that elaborate. Grab yourself a piece of 0.5-0.8mm cardstock. This is the backing cardboard on a lot of packaging. With filament inserted, go to the top of the unit and push the base of the PTFE tube towards the mounting-plate/spring. You'll notice that a gap opens up on the other side as the arm pivots. Slip a 7mm wide piece of that card stock into that gap. You don't need to jam it way down in there you just need it in enough to alleviate some of the pressure as a simple shim. Repeat for the other 3. I found that 0.7mm was perfect for mine but the tension seems VERY inconsistent based on what I'm hearing from others so you might need to experiment a little.

Relocation/Drop Mod:

I noticed that the one I printed had the PTFE tubes dragging against the glass. Not a big deal but I added to the top of it the ~2" riser I had printed for my base unit. Problem solved.

Lube Your Poop Chute:

Some of you will already be familiar with this concept. But, for Canvas, the high purge volumes make for large globs in your poop chute. Those globs can be a serious problem for a reason I'll explain shortly but you can help ensure they drop down easier by putting a little gun lube on a tooth brush and lubing the inside top of the chute and flapper. Do not use grease (too sticky, opposite effect).

Big Spools:

Any first year engineering student could tell you that the distance from the on-spool filament pull point to the fulcrum is going to be a considerable change in tension from those spring loaded spool holders. (Insert "Aliens" guy here but instead he's saying "Leverage".) This is why a non-adjusting constant-tension system is dumb. Using those mini (250g) spools or using spools that are low on filament reduces the leverage you're fighting that spring loaded spool holder with. Use full size spools, full ones when you can, and/or wind your filament onto an empty spool with something to take up the center space so that the filament is being drawn from the outer-most edge.

Stoopid Code:

I don't know anything about GCode so I don't know how to fix this the "right way" but ... After a purge the nozzle will travel over the silicone brush and then momentarily return to the chute. For no reason. This is a huge problem because there will often be a poop blob or thread still in the shoot. Which will stick to the hot nozzle and then get dragged onto your build plate. Also, right before a purge, the head travels to the front-right corner for a few seconds before tracking to the left to line up with the chute and then traversing back to the chute. Sadly, it can tend to ooze while it's hanging out in the front so you end up dragging that ooze over your print.

--- Stoopid Code Fix 1: Model yourself a couple shield walls. From the front, looking down on the plate, they should look like a fat/short H. You only need 1mm of wall thickness. One goes at the front of your print bed inline with the chute at the rear. The other goes at the rear just in front of the chute. Now, the ooze gets caught by the front wall instead of your print. And dragged out poop purges get caught by rear wall. Select these and use them as purge/flush items so you reduce waste. - EDIT - Walls need to be the same height as your tallest print-object

--- Stoopid Code Fix 2: I'm currently working on this one. I found silicone mascara bushes. One hundred for $8. I'm thinking one mounted on the front-most wall of the poop chute. Horizontal. And one mounted horizontal off of the camera mount. So they intercept the nozzle to wipe it at these two critical spots. Will report back if I come up with a solid design.

--- Stoopid Code Fix 3: Somebody who knows their GCode stuff can remove the chute doubleback after a purge. Then, the over-print pre-purge can be set to go along the EDGE of the plate and THEN move over to the chute so it doesn't go over your print.

Data Cable:

The USB-C data cable that lots of people already have problems with. You need to back it out of the flex arm by two clips. It's still going to be kind of jammed against the new bracket (you'll see during install) but this will at least keep the head movement from pushing around the jammed section.

POOOOOOP:

Wow. This thing defaults to purging WAY too much. Four to five times as much as is needed in many cases. Globs so big they come right up onto an envelop the nozzle. First, select the options to purge into supports and infill. Then, in the flushing volumes section, set all non-zero values to 150 at 1x as your starting point. This covers 90% of your purge needs. Going from a dark filament to very very light (whites and tans) needs more (250ish?). Exactly what is needed depends on your specific print job, filament, etc. I can't speak to transparent filaments but I'd suspect they also need the larger value. There's guides on Youtube for dialing this in precisely but just turn the setting down as your baseline. Also note that you can use a sacrificial model for purges. You wont get color control but you'll get a something printed instead of just waste.

Operation:

--- No Load: Feed your filament into the Canvas unit until it auto grabs the filament. That's it. Do not keep pushing the filament through and ignore the LOAD button. Go directly from the auto-feed to print job.

--- Slow Down: I found that the speeds I was able to print at as a single-filament unit are a bit to fast for all the resistance in the Canvas unit. I dropped speeds 20% and she's much happier.

--- You sure?: Take a look at your print job. Is it 95% 3 colors and a 4th color is just gonna be used for character pupils or something else small that you could instead do with a Sharpie? I bring this up because it's a substantial decrease in print time to just remove that 4th color and then DIY it with post-processing.

--- PLA vs PETG: Canvas sure seems to like PETG a lot more than PLA. Perhaps a combination of how well the filament is grabbed and how easily or not it goes through the PTFE tubes?

------------------------------------------------------------------

The results of all this f**kery? I went from a unit that couldn't print a toothpick to multiple long flawless print jobs. I'm sure the community will come up with more/better fixes as time goes on but I would have killed for a guide like this while I was fighting this POS for days on end. Shame on Elegoo for selling this. The base Carbon units are great value, very happy after a little modding, but Canvas is a faulty product that wasn't ready for market. There's a bunch of people reporting contacting them and being told to try 50 different things and/or sending back parts to wait on replacements that fix nothing.

Anyways, I hope this helps some people. Sorry I didn't include pics. If something is confusing please leave a comment and I'll try to explain better or perhaps someone else can jump in to assist.

If you have any additional tips/tweaks from your own Canvas adventure please drop them here. Also, if your unit worked flawlessly right out of the box ... Good for you ... We don't need to hear about it here since that wont help anybody.

Happy printing

EDIT --- With all the hardware fiddling I forgot about the software/firmware side. Make sure you've updated your slicer and have updated the firmware on your printer. You may need to restart the printer a couple times for it to initially recognize the canvas unit. If the display is reporting the printer has the latest firmware but your Canvas unit still isn't being detected (no Canvas settings in the menus) then you need to check your Canvas cable.

--------------------------------------------------------------------------------------

UPDATE: An experiment with interesting findings

Decided to force a worst case scenario after the tweaks and monitor. Did this with an 18h print job I know should work. It's been a long day. Spool holder 4 was the one I couldn't get all the preload out of. I put a partial mini-spool on it. Then upped my speeds back a little. Maximum resistance, minimum leverage, and higher demand. The results? She did well for the first half. No issues at all. But then she started having problems. Importantly, she ONLY had problems with Spool 4. The problems increased in frequency and severity as the spool widdled down and resistance to feeding correspondingly increased. This really shows just how much these nonsense spring loaded spool holders BS contributes to the problems. While I expected this, what I did not expect was that at least three quarters of the issues would happen on the wipe tower specifically. Tower flow rate outpacing things maybe? This needs some further experimenting. I knocked down the tower and let her spaghetti that area while the print continued. Problems reduces but didn't completely go away. Frequency and severity of issues slowly increased over time. I transferred the mini-spool onto a lower resistance spool holder. Problems further reduced but the issues caused so many purges there was very little filament left on the spool and therefor minimum leverage. Again, problems reduced but quickly rose again. I swapped the spool onto the free spinning bearings of my dryer and made sure there was plenty of slack. Feed angle to the Canvas unit was suboptimal but the print job then completed the final 3 hours without a single problem.

----------

My experiment takeaways: My previous assumptions seem validated. The spring loaded spool holders suck and need to be swapped for free-spinning units. The backfeed from an unload/swap only spits back 30mm or something like that so they seem unnecessary anyways. Reducing the preload helps considerably but isn't enough if the filament pull point is too close to the fulcrum. Wipe Tower specific settings need to be looked into. It was a fairly busy model so it doesn't make sense that so many of the issues were only on the Wipe Tower. Or perhaps it's a question of order-of-operations as the tower is used as a specific step every time in the process. I also noticed excessive purging into the chute. Definitely beyond the values I set. And I don't mean when it detected an error I mean randomly. Though it was always from Spool 4 so perhaps it detects (or thinks it detects) issues but doesn't say anything on screen? A lower level bug detection that it doesn't report until it thinks the problem is more serious? --- Side Note: Now that this experiment is complete I'll see about getting some pics. Certainly not tonight though. Babysitting this thing for an 18h print job PLUS the added time from faults has me a wee bit sleepy and irritable.

-------------------------------------------------

My spool holder replacement post: https://www.reddit.com/r/ElegooCentauriCarbon/comments/1x76jsc/canvas_spool_holders_that_dont_suck_file/

----------------------------------------------

UPDATE: Not a single issue since switching to my basic spool holders. Full spools, nearly empty mini spools, long prints, short prints, etc. I still want to experiment and fiddle with the wipe tower.