Something seriously wrong with my machine

After enclosing my VC3.1 300 and changing all parts to ABS - this is the best I can get after think ~100 attempts to tune/measure belts
Any ideas what is wrong and how to fix?

drops•7/28/23, 9:39 AM

125 is something loose, as for the graphs, looks like tension on upper is too high. I have never gotten anything worst than MZV suggestion . I would check that the whole gantry moves freely too.

hurt-tomatoOP•7/29/23, 8:40 AM

My printer probably damned. Or I'm damned. Maybe I should sell it and live normal life, I don't know. This is the best I can get after another full reassemble of motion system with change of XY joiners, total checking of everything, etc... just does not work no matter what I'm doing.

drops•8/1/23, 7:59 AM

I think your overtightened. Put the gantry at 250,250 and the belts should flex a bit if you press them. If they don't your tight. Also I would try a tool. Like from thinvgverse to get you half way there

Sspontaneous-moccasin I think your overtightened. Put the gantry at 250,250 and the belts should flex ...

hurt-tomatoOP•8/1/23, 11:20 AM

I set initial belts preload via tone method (with spectroid app) and tried 60 / 75 / 90 hz - no big difference, graphs look like shit anyway

urgent-maroon•8/1/23, 12:49 PM

does it print really unusably badly?

Uurgent-maroon does it print really unusably badly?

hurt-tomatoOP•8/2/23, 8:07 AM

Not, but you could not get good speed/acceleration which does not really make sense for so expensive printer

urgent-maroon•8/4/23, 1:32 PM

ok interesting, I may be having the same issue

urgent-maroon•8/4/23, 1:33 PM

I also get belt skips whenever I try to go past 15k accel

drops•8/5/23, 1:54 AM

Just from what I see the amplitude on the frequency from the smaller ones is around 8k.
I have a vcore 500 and I do get the 1e^6 around 1.2

drops•8/5/23, 1:54 AM

So I think your overtighting

hurt-tomatoOP•8/10/23, 6:24 PM

I... just don't understant.

hurt-tomatoOP•8/10/23, 6:25 PM

FMMM mod + Metal XY joiners

hurt-tomatoOP•8/10/23, 6:26 PM

Home come I get so bad results literally no matter what...

urgent-maroon•8/11/23, 4:25 AM

could this be related to the mounting of the sensor or some other interference related effect? Do prints really obviously reflect this?

Vitamin G•8/12/23, 12:26 AM

I think you should check your sensor as well

hurt-tomatoOP•8/12/23, 10:04 AM

Yeah, also think that might be the case. In my case it is ADXL on EBB42, so it is quite far from nozzle and the mount itself not very rigid

hurt-tomatoOP•8/12/23, 10:05 AM

Results after changing belts to Gates

hurt-tomatoOP•8/16/23, 3:21 PM

Not sure why I'm still sending pictures here

hurt-tomatoOP•8/16/23, 3:22 PM

After another set of adjustments here and there and significantly lower tension (~ 60 Hz on Spectroid)

inadequate-blush•8/16/23, 8:25 PM

post pictures with the belts, and the corners where the belts ride the pulleys/idlers, should be belt dust everywhere. they are rubbing somewhere

Iinadequate-blush post pictures with the belts, and the corners where the belts ride the pulleys/i...

hurt-tomatoOP•8/16/23, 8:38 PM

Belts definitely not everywhere in the center of pulleys/bearings, unfortunately all attempts to make them perfectly centered failed, I do not believe this is even possible, they moving a little up and down anyways. What I see - it does not cause damage to belts, all sides of belts are fine.

Iinadequate-blush post pictures with the belts, and the corners where the belts ride the pulleys/i...

hurt-tomatoOP•8/16/23, 8:52 PM

I posted photo of belts "dust" here - https://discord.com/channels/582187371529764864/582187372142395424/1140998393938841631

but it was everywhere, all places, I assume those are just new belts, after cleaning I don't see this anymore

hurt-tomatoOP•12/2/23, 7:57 PM

Okay, this is fixed

Nebulator•12/3/23, 9:04 AM

And what did you do to fix it?

Ddeveloped-pink And what did you do to fix it?

hurt-tomatoOP•12/3/23, 10:17 AM

Hehe, new printer basically

Full reassemble with more stiff corner brackets where possible, shoulder bolts, lightweight X gantry and (damn it) new toolhead

Aasychev Hehe, new printer basically 🙂 Full reassemble with more stiff corner brackets w...

Nebulator•12/3/23, 11:29 AM

which toolhead?

Ddeveloped-pink which toolhead?

hurt-tomatoOP•12/3/23, 12:00 PM

RatRig

drops•12/4/23, 11:06 PM

Noice, I was in the same boat. I switched to dual rail mgn9 , grantryless. VZ CNC printhead, and BRS engineering m2 tensioner and boom. Fixed.

drops•12/4/23, 11:07 PM

Im in the process of installing all metal brackets too , I think the Eva is too complex, my mgn9 rails are also preloaded. Additionally moving the tensioner eliminated more screws.

Sspontaneous-moccasin Noice, I was in the same boat. I switched to dual rail mgn9 , grantryless. VZ CN...

hurt-tomatoOP•12/5/23, 11:39 AM

Yes, unfortunately, this what you have to do with stock config to make it usable...

Sspontaneous-moccasin Im in the process of installing all metal brackets too , I think the Eva is too ...

hurt-tomatoOP•12/5/23, 11:40 AM

There is new type - https://www.aliexpress.com/item/1005006198538785.html

might be more lightweight. I won't be trying, too much upgrades already

drops•12/7/23, 9:23 AM

Yeah ended up installing that today, no improvements. I think most of it came from the CNC printhead and going dual rail. Now it's just the challenges of having a vcore 500