We solved this common problem in 3D printing

Are you still troubled by this repeating ripple-like pattern all over the surface? As Original i3 fans, we researched how VFA(MRR) formed on prints and how to solve VFA on our machines. Even more, our solutions are now available as upgrade kits for Original i3. Check it out!

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[skaltura]

now i realize why this sounded like TV Shop advert from the start

[kaustuvakash]

You guys went to the root of the problem and actually worked to solve it. Hats off to the effort, hope the community review is as validating as this video.

[MrHeHim]

I don't think it's a "frequency" persay, but the actual 1.8 degree step the motors are built on. You have two poles in a motor and want to both push and pull on both of them to achieve a position or "step" in between each 1.8 degrees, the finer you can adjust the voltages and the better the coil windings are relative to one an other help achieve better accurately (even coils) and smoothen the motion.

My old Makerbot Replicator printed with nearly no VFA, so that was actually something new to me when i got an i3 clone about 5 years ago. Those old motors also ran very warm and with harsh stepper drivers (i think the key to it was the warm motors). I put one of the motors from my old Replicator on my newer printer's extruder and immediately heavily reduced said issue. Then i put one of the old motors on the X axis and in my tests nearly completely eliminated VFA. My assumption is first quality, then i thought about the heat.. the heat effectively acts as a voltage buffer/smoother, smoothing out the motion. Then TL-smoothers started being sold for printers with cheap stepper motors/drivers. And they defiantly do work, but will reduce the power of the motor by about 10-20% and dump it out was heat.. which is why i almost think the old motors where possibly even designed to run hot because they where in a way wasting electrical "spikes" or stepping edges as heat.

[easyluckable]

Would love to see more reviews of this! Please reach out to more YouTubers so we can see more reviews from community members.

[gyorgybalassy]

Sorry, but this sounds too good to be true. Please send out kits for community influencers like 3D Printing Nerd, Maker's Muse, Thomas Sanladerer and of course Prusa 3D for public reviews.

[XxBanziixX]

Not going to lie they made this video in a way that it makes everything they are saying sound like they are selling snake oil. I'm going to hold judgement on this until some well known in the community gets their hands on this kit.

[Inventorsquare]

Excellent and informative presentation. I can never unsee MRR as ‘material removal rate’.

[robertconklin]

I think this issue is also a function of motor control rather than the motor alone. I and my company design electric quad copter UAS and have discovered those same exact vibrations can be eliminated with finer/cleaner motor controls. That said, introducing fancy new motor controls into a printer may be a tough thing for most folks.

[repinscorpio]

Only now I finally put these motors, and they work amazingly! The only problem I had was that my belts were 2mm shorter and I had to order longer ones from Aliexpress.

[REDxFROG]

We really need some reviewers to try this out on a Prusa MK3s+ ...

[smoothbraindetainer]

These are cool and all but $100 for **two** steppers? I feel like there are better ways to combat this

[FlavoredCrayon]

Edit: wait wait wait the motor vibration cant be the only problem here. For those vibrations to manifest in features mms wide wouldn't they have to be in the 0-10 hertz range? the print head is only moving across the features peak to peak distance every 0.5 second or so. I'm confused haha

Coming from FPV drones, unwanted vibrations miserable. Motors/build stability are the absolute biggest factors. However, we have a fair few "fixes" that we can employ in less than ideal situations. I'm curious how soft-mounting motors, belt tension adjustment, or increasing stiffness/ adding flex in strategic places would alter those vibrations. The name of the game in FPV is move the vibrations higher with stiffness(so it can be easily be filtered in software), and using soft mounting strategically to isolate vibrations. I'm no expert by any means, and I do want to thank you guys for putting work into application specific motor designs. My uneducated gut is telling me adding weight to the moving parts to reduce the resonance at the motors vibration frequency, and reducing/increasing the rigidity of the motor and print head coupling could help. Best option is to use the right parts in the first place though.

[twoheadedpanthr]

Are there any outside reviews done of these motors? I'd like to see if their results can be duplicated.

[cadenkraft]

This is a really interesting idea and I think motors purpose built for 3D printing is a great idea. I saw a comment regarding Voron compatibility and was wondering if you plan on making a version with a JST connection so it can be an easier swap in replacement for people with more custom designs. Also I assume these are 1.8 degree steppers, are there any plans for a 0.9 degree version if not already existing. Also selling them individually or in 4 packs would be cool.

[snower]

Has anyone tested variable (random) feed speeds? This is done in CNC machining to prevent chattering.

[victortitov]

do these motors still have a bad resonance with StealthChop at high speeds?

[yakine]

Your video's quality is astonishing...

[walkinmn]

You should show this to @MihaiDesigns, he will love it!

[Thegreat]

Is it possible to find two motors with comparable res Freqs and run them on the same axis, but have them be 180* out of phase with one another to neutralize the vibrations?

[oneheadlight]

Does the prusa mini use this motor? It’s completely absent of MRR