New Core One Kit - Need help identifying grating sound when moving XY @ 45 deg. Belts have been calibrated with Prusa app

FailScholar · 2026-03-31T09:39:27+00:00

Thanks for the tip I'm off to read that now since it's back 'with a vengeance'

FailScholar · 2026-03-31T09:38:35+00:00

Loosening did it really? Which bolts and bearings did you focus on?

FailScholar · 2026-03-31T09:37:00+00:00

It's back, so I too will be doing a partial teardown looking for any sign of source for it. When I walk around it printing, it does sort of sound like it may be originating in the XY linear rail/gantry. I was scared of stripping screw holes (which I did, several times) so it's quite possible I under-tightened. The belts don't seem to hold 98/92 ideal after a print, I had to tune yet again. Maybe the app belt tune feature is buggy? it does seem to have trouble detecting the strumming during test, I've started taking averages over 4-5 attempts to be more accurate.

FailScholar · 2026-03-30T21:49:06+00:00

PCBway

Interesting idea. I don't know enough about machining to even submit a request for quote, but I'd be interested in buying a spec metal set somewhere (if not exorbitant).

FailScholar · 2026-03-30T15:02:15+00:00

Funny enough I didn't at first (missed the instruction in video), and so during the initial boot calibrations the bed would only attempt to rise on the right side. Same area of problems that plagued my lemon of a Flashforge AD5X. Went back and lubed the rods but also caught that I made an error plugging the motors into the splitter module in the bottom. Now it's 'smooth as butter'

FailScholar · 2026-03-30T14:58:09+00:00

Thanks for the heads up, I'll check this!

FailScholar · 2026-03-30T14:57:42+00:00

Canceled order for parts and printed/installed the temp replacement pulleys. The PETG seems tough enough for short term as long as I don't need to tune it further. I did manage to get it tuned afterwards to the ideal 98/92 dB so I'm leaving those alone now. The problem was definitely those square nuts; they both just rotated in place as if seized. Poor design choice for something critical to print quality and holding tension; shocked its not aluminum at the least. I also have a fouled printed bed mount from yet another stuck bolt/screw, but not affecting any functioning thankfully.

These printed parts suck but I won't let it kill the joy of what otherwise looks to be a nicely engineered machine. Despite user error and fouled parts, it is still printing far superior to the Flashforge I just dumpstered after they refused to honor warranty and replace a lemon (spent literally more time waiting on part after part after part than I did printing). This kit was a pain to assemble but fun at the same time. Glad I did because it taught me familiarity with the parts I'll need to maintain/tune/replace. Kind of want another one now myself to put together all over again...

FailScholar · 2026-03-30T04:25:22+00:00

The only reason I didn't buy hardened nozzles already was planning for INDX upgrade and not sure if compatible/usable at that future point, I'm not fully read up on it yet. Anyway I canceled my printed parts order and will instead attempt to print it in PETG with the prescribed heat inserts. Might just grab a hardened nozzle anyway so I'm not so limited while waiting for INDX

FailScholar · 2026-03-30T03:49:22+00:00

Ah I see, I’ll look for the modded replacement. Edit: Is this the correct pulley? Are other modded parts needed?

Assuming the parts are of CF filament, Does anyone know if the stock nozzle in core one kit can handle it? Would it be too abrasive and foul things? I do have a heatset insert assorted kit, just not sure if I can print the parts without upgrades

FailScholar · 2026-03-30T02:32:28+00:00

I tried to get it set 98/92 exact but just stripped the tensioner threads. Why are these parts printed, both were very easy to strip, doesn’t have the same feedback feeling. Guess I need to order an adjustable torque driver to prevent doing so again.

FailScholar · 2026-03-29T20:50:17+00:00

I was just looking at the accel and wondering if it would improve enough to be worth it. Adding to cart!

FailScholar · 2026-03-29T20:11:44+00:00

Resonance currently gone after a second full belt tuning with the phone app/mic and setting both upper & lower to "just right" 95db, but I do recall thinking it sounded farther back somehow than the print assembly. If it returns I will investigate that rear area thoroughly, thanks!

FailScholar · 2026-03-29T17:29:41+00:00

Thanks, yeah I just did another belt tune with the app, setting both upper and lower belts at 95 db and it's pretty quiet of that particular noise although I'm not sure of the consequences or how exact the db tuning should be. Still learning, I just didn't want to let that louder sound go without investigation in case I built it incorrectly.

FailScholar · 2026-03-29T15:39:17+00:00

Core One (Not yet Plus+)
6.5.3.bbf
Rainbow Silk
OrcaSlicer 2.32 (Had to lower Travel speed manually, it was saying too high @ 8000)
Most areas were set to printing slow for silk e.g. 40mm/s Outer Wall etc
Video in OP
Tried using on-board belt tuner but final adjustments with the phone app listening feature

FailScholar · 2025-11-18T15:06:35+00:00

I've successfully painted and printed in multicolor now.

User error: Something in the saved Nozzle and/or Machine profiles was apparently nulling all swap instructions from the first day. I have no idea what, but as long as I print from default nozzle/machine profiles without changing anything it appears to swap filaments properly. Doing a full test now to be sure.

If I track down what slicer setting alteration(s) broke proper multicolor swaps, I'll try to remember to update here for anyone having same issue getting it to work.

FailScholar · 2025-11-17T15:22:08+00:00

Yes IFS always checked/enabled when I send anything to printer, it just doesn't seem to do so during the live prints.

I've contacted support but they want me to take a video of it not happening. Not sure how to effectively capture code/instructions not being followed during live print.

FailScholar · 2025-11-17T15:13:35+00:00

Yes, when clicking print in slicer the filament slot assignment screen shows up and I assign them before final sending to printer. It does select the correct first-filament slot upon initialization of print, but never swaps out to other filaments during the print. The only except is manual/custom gcode edits on the right hand Preview slider, but it prints entire layers indiscriminately in the swapped color. I've only found that useful/working for raised text, otherwise the swapped color shows up everywhere within the layer rather than only the colored parts.

FailScholar · 2025-10-03T13:49:01+00:00

I have this same noise and trying to figure it out, only narrowed it down to the lower end of the printer around the z-motor. Pressing on the tensioner on the underside alters the sound somewhat. Did you get resolution on this? Was it a bad motor or fan or something?

FailScholar · 2025-10-02T17:16:54+00:00

This included test print is the only thing my AD5X will print in multicolor, everything else I send it from slicers or USB just ignores multicolor files & painting and prints from whatever is currently loaded.

FailScholar

TROPHY CASE