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605,849 Views • May 4, 2022 • Click to toggle off description
This video: Making a big 'industrial performance' CNC router, that will hopefully mill metals.
The spindle motor in the video is a 240V single phase Jianken JGL-100mm 3.2kw 24000rpm BT30 ATC. It has ceramic bearings and thus far seems very very nice. We chose a 4 pole one, which has somewhat more torque at lower rpm than the 2 pole, but requires an 800Hz VFD. We will do a whole video on the spindle in the future. You can find them here: jianken.en.alibaba.com/ and if you do buy from them, message them and mention 'Flowering Elbow' to get yourself a discount!
The next CNC video pushing the limits of this machine: • Learning to use an industrial-DIY CNC
This CNC machine needs to earn its place in the workshop, so the plan is to make something that can cut 8 x 4 ft sheets and flatten big chainsaw milled slabs, as well as machine aluminum and steel parts.
Making the unorthodox gantry video: • Experiments in Gantry Design: What ma...
Casting and making the z-axis video: • Bigger castings, melting and making a...
The washing machine speed control circuit video is here: • How to reuse Washing Machine Motors [...
More videos on the CNC on our other channel FE4SuperNerds - / @floweringelbow4supernerds
If you would like to play with the 3D model of this machine you can get it if you buy us a coffee here: ko-fi.com/floweringelbow/shop
Metalized epoxy guide: ko-fi.com/s/bb8cbd72e1
The spindle motor in the video is a 240V single phase Jianken JGL-100mm 3.2kw 24000rpm BT30 ATC. It has ceramic bearings and thus far seems very very nice. We chose a 4 pole one, which has somewhat more torque at lower rpm than the 2 pole, but requires an 800Hz VFD. We will do a whole video on the spindle in the future. You can find them here: jianken.en.alibaba.com/ and if you do buy from them, message them and mention 'Flowering Elbow' to get yourself a discount!
If you want to check out Frank's avid CNC videos look here: • The CNC Build: Part 1: All About That... and for • Building DIY CNC Router - [Part 7] - ... T-slot extrusion machine, see here: • Building DIY CNC Router - [Part 7] - ...
Lets Connect!
Ko-fi ko-fi.com/floweringelbow/
Our website: www.FloweringElbow.org/
FB: www.facebook.com/floweringelbow/
Views : 605,849
Genre: Education
Date of upload: May 4, 2022 ^^
Rating : 4.952 (162/13,375 LTDR)
RYD date created : 2024-05-18T04:55:23.015013Z
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YouTube Comments - 977 Comments
Top Comments of this video!! :3
I would watch every minute of an extended version. Epoxy leveling, making the bearing, sourcing materials etc. Awesome
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Brilliant. Speaking as an engineer, I know PLENTY of engineers that wouldnt have done half as good a job as you did. Very well done!
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The rotating ball nut is a critical and fantastic idea.
The inertia of the rotating ballscrew is definitely a limiter to accelerating the gantry in Y, but there's a bigger problem: The ballscrew is unstable in sag. As it sags more, the centripetal force from rotating throws the sag out more. This places an RPM limit on the rotating ballscrew than decreases quadratically with length. That limits the speed of traverse in Y.
It's too late now, but for folks thinking about building CNCs of this size, especially with concrete or epoxy granite damped frames, you might want to consider casting in tubing. By circulating water and controlling the temperature of that circulated water, you can limit the thermal expansion of the frame and ballscrews. Some ballscrews are available hollow. Circulating coolant through a ballscrew is a heck of a lot easier when it isn't rotating.
Note that coolant is a bit of a misnomer. There isn't generally a lot of heat input to the frame and ballscrews. Rather you want them to stay the same temperature, day or night, season to season.
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I’m just speechless. I have no words adequate to properly describe my admiration for your vision, your fortitude, or your capabilities. I’m going to be studying and referring to this video many times. Thanks for putting such extra effort into your build that it took to create it.
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Its rare to see someone with such a grasp of engineering, ingenuity, and tooling skills. Cheers!
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No words to described how impress I'm, thanks for sharing.
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this channel should have 1 mil subs. focus on sound quality
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As someone who has built a 4x2 ft router/plasma table using Alu extrusion, then converted a mill to CNC, I am very impressed. Subscribed.
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This build is incredible. Such a great effort investment to your workflow. Huge kudos to you. Wow.
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It's amazing how broad and deep the scope of knowledge needed to build a good CNC is. I remember building one out of plywood a few years ago, torsion boxes to maintain rigidity because "aluminum is too expensive to make this rigid enough", skipping things that I felt entirely out of reach at the moment and simplifying as much as possible. Mind you, it was just a 90x90cm CNC for wood and some aluminum, with SBR rails that required less precision and much less force to manage. It wasn't a good CNC, it worked but every bit I knowingly skipped came to bite me in the butt.
It was a nightmare and a love project at the same time, took me months all in all. Had to learn a bunch of stuff on quite a few fields of knowledge. As and engineer and lifetime geek with experience in manual work and machining, it wasn't nearly enough.
What you've done is truly astounding. No single path can prepare you for that, plenty of engineers would fail to even grasp the full complexity of the project. It truly takes a jack-of-all-trades and master of several to pull this off. Hat's off to you. Now I wanna see this machine making some thick chips hahah
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You have the workshop I dream about!
I hope I get there some day.
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IMO you are one of the few builders who understand/feel the importance of the mass and rigidity, I liked it! And the best proof of it is the ability to cut steel with an acceptable material removal rate and result. 👏
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2:16 let me just say at this point, that there is a hell of a lot of measuring that went into this, there have to be right angles all over and you're not in your CAD, you have to hold it tight or it will move, it's all by sight and welding also does it's thing and you have to take that into account.
What a monster of a project, I'm in awe.
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The mind is probably the most powerful tool to have.
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"my natural inclination to over build" I felt this.
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7:30 shrinking issues will be minimized by using hydrophilic fiber in the mix. This additive releases moisture back into the cement gradually, compensating for excess moisture loss from the porous or exposed surfaces. Of course, placing a waterproof coating on the exposed surface, like wax spray or plastic film, also helps.
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I have seen a few such machines on YouTube, Frank Howarth being the most notable, but I have never seen a DIY system machine steel. It did so with no apparent chatter or issues of any kind, although you were wise to clear the swarth with those small cutters. I am seriously impressed, and I want to give that some context by saying I am a retired toolmaker and design engineer, so I have a feeling for the issues you faced and overcame. Very impressed indeed.
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Man, the quality of work here is astonishing!
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I watch a lot of youtube frabricators, far too many probably; however, this is the most clever design and build I have seen to date!
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@rsc4peace971
1 year ago
As a retired Ph.D. material scientist, I have not seen or heard a better "documentary" of an EPIC machine built using upcycled parts, countless STEM principles explained while actually doing it to a working machine that is just a showcase piece for anyone watching it. Somehow every time I come across such work by folks out there (a team of 2 in your case) it is awe-inspiring to know we have come a long way from having to rely on cumbersome or even unattainable ways to share/seek knowhow even within a select community. The world is a much better place with so much sharing of a lot of good (of course with many BAAD) contents, we are at warp speed in learning collectively across this planet. BTW, I am a woodworking hobbyist and came upon your chainsaw mill book which I bought. Thanks for such captivating content, of which I am a fan (oh an addict).
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