I really enjoy revisiting this channel .. I really enjoy ur videos ... food for my brain ...
@geekoid183
4 жыл бұрын
I think you're achieving your goal in every single one of your last videos. Thought research and demonstration your work truly inspire the scientific method. That's something we don't see much in the 3d printing community, I like it !
@fail_fast
2 жыл бұрын
Hey Eddie, I know why your mass per length value of 9.1g/m didn't match Gates' of 1.4. I was reading the design guide and those mass constants are actually gram/m per mm of belt width . So if you take your measured value of 9.1g/m and divide it by the 6mm width then you get something close ~1.5g/mm. Great video, keep 'em coming. I loving see fundamentals of engineering applied to fun topics.
@PieterStefan
4 жыл бұрын
This is just awesome! This is well overdue within the 3d printing community as a whole. Thank you for taking the time and making the effort as I believe this series will contribute greatly. Awesome is an understatement.
@Novacat170
3 жыл бұрын
Hi eddie I'll try to give my grain of salt to the community (as I'm building a custom corexy based on the voron and comunity printers, but with 2 Z leadscrews instead of belts, as it was what i had around). As a CAE engineer "who works at the automotive industry" and for years specialized in NVH, I can tell you that even though you are not wrong in the aproach of the belt simplification. The actual printer behaviour is more aproximated to a "fixation"+belt+mass(extruder)+belt+fixation system. Natural frequencies or resonances can nearly be expressed as a complication of the 1D-spring natural frequency model but combined. If you look at the belt tension formula its a derivation of the fn=1/(2π)×√(k/m) where K is de rigidity and m the mass. so assuming that the extruder an everything else is rigid and only the belt area in the X axis is "vibrating" and resonating they do because the rigidity of the belt is not "enough to hold" the relative position of the printer head vs the pulley that generates the "movement/oscilation/vibration". I found comprenhensive to think of resonance as punching a boxing bag. if you match your "punch" or pulley-belt moving force with it coming to you, you will stop/ cancel the "movement" If you instead wait and punch it again when it came through and goes back forward it will go further. That punching frequency is your resonance frequency. Something similar happens with "structures" and our belts. if they were infinitely rigid the motor would pull them a 1mm at whatever frequency generating i.e. 1000m/s^2 accel that would move the printhead and belt mass but as something rigid that accel/force would not deform the belt so the belt printhead would have moved 1mm. But as they are nor rigid it happens like a whip effect that the pulley has pulled pushed an pulled again and your belt extruder end still hasn't come back so beeing still "deformed/displaced" it recieves the new punch deforming even more.... The thing is that your oscilating mass includes your "extruder mass" and so it should be taken into account for "ideal" belt tension calculations. The problem is that a lot of factors influence that. extruder design, mass belt sizes, belt materials.... so its not easy to give an actual fill in formula for every printer. But its nice to see people trying to explain this to everybody. Oh and a simple note. a too loose belt means nothing holding the extruder so with low accels the belt can "flex" and create defects. But a too tight belt transfers every other part vibration (motors, fans, leadscrews, to the head. giving also artifacts. So the ideal would be a enouch tight belt to hold the head mass but not too tight to Damp other incoming vibrations. Nothing easy xD. Love your videos. hope you keep doing them and hope I helped understanding It a little better. (on damping effects would take another half sheet text to explain xD)
@dinosoarskill17
3 жыл бұрын
This is the right direction for the community! Better knowledge, understanding, and prints for everyone!
@Notmy00000
3 жыл бұрын
🇳🇱🤪🤪🤪🤪🤪🤪👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍 thanks for reminder. i learned this in the gray past in technical school. but I had no electrical equipment but two rulers. one for wheel to wheel and 1 for the time belt
@np8781
4 жыл бұрын
Thanks for your research Eddie!
@shipiboconibo
3 жыл бұрын
your the first person I've heard describe this banding. I've suspected it was belt related but couldn't prove it. I switched from smooth idlers to toothed idlers a while back and that helped (all gone on y axis) but I've had this pattern remain on X (using an i3 clone btw). Now I'm thinking maybe I over stretched my belt and should change it. Going to try this soon. I was given advice like you've mentioned "you probably need to make it way tighter than what you think".... Thanks for this!
@eddietheengineer
3 жыл бұрын
The 2mm vertical banding is still a mystery to me--Railcore did a lot of experimentation but it didn't seem to be super conclusive (at least not repeatable across a lot of printers). Fortunately I don't really see the pattern on my printer but if I go down the rabbit hole again sometime and find anything I'll be sure to share :)
@karlangerer9122
3 жыл бұрын
NOT DULL!!! Agree with Pieter. Way overdue.
@yvesinformel221
3 жыл бұрын
OK, so there is no conclusion for belt tension in this video
@stefanguiton
2 жыл бұрын
Excellent video!
@mosher2302
4 жыл бұрын
Great video Eddie
@AzCowboyOne
4 жыл бұрын
Thank you sir.
@lam_xyz
10 ай бұрын
Thanks for this in-depth video! In the end, what's your conclusion, how should I tension the belts of my voron? According to the Gates formula? Or what do you do you suggest?
@eddietheengineer
10 ай бұрын
That's a great question--I don't think I have a great conclusive answer for you. My current favorite check is to measure the resonance of X and Y using an accelerometer--if your X frequency peak is between 50-60Hz you should be in the right ballpark for a standard Voron Trident or V2. If you have multiple peaks on X that are close to each other, I'd double check your belts to make sure they are evenly tensioned.
@hendrixh
2 жыл бұрын
Thanks for the video! However, I cant understand if you are using a GT2 or GT3 belt. They are not the same belt and according to Gates website GT3 is a stronger belt with improved technical capability across the board.
@christophertilley4297
2 жыл бұрын
What if you have two spikes when measuring tension. I have a spike at 120 and another over 200. Which one should I tune belts to?
@Dark_Knightro
4 жыл бұрын
Thank you. How about the Voron set up series?
@eddietheengineer
4 жыл бұрын
DarkKnightro I haven’t forgotten about it 😊. In fact, I have a printer on hand that needs Klipper set up on it, so I should be able to get that done. I’m not positive on the timeline though!
@Dark_Knightro
4 жыл бұрын
eddietheengineer awesome. I can’t wait for it!
@sandsack123
2 жыл бұрын
audio level is way too low.
@eddietheengineer
2 жыл бұрын
Yes! This was an earlier video before I really knew what I was doing. Are the newer videos better?
@sandsack123
2 жыл бұрын
@@eddietheengineer Yes, the later videos I checked are are better.
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