Позвольте кратко изложить, что отсутствует. Я вдоволь насмеялся: без роликов Хоффмана ничего не получится. Вы можете пропустить это видео, если у вас нет роликов Хоффмана, без них вы не добьетесь результата. Вам понадобится обычный подшипник с цилиндрическими телами качения - это секрет. При шлифовании металл подвергается резанию, вызывающему пластическую деформацию, часть металла отрывается от основной массы, а часть остается. Это влияет на точность из-за преодоления предела текучести и прочности. Кроме того, учитывайте старение металла и температуру окружающей среды. Металл с различным содержанием углерода может деформироваться при температурных изменениях. Старение металла - важная тема: при шлифовке металл меняет свою геометрию из-за внутренних напряжений. Оставление металла на улице позволяет ему "успокоиться", после чего повторно снимают слой и дают снова устояться. Существует множество методов старения, которые стоит изучить. Работа со старыми станками легче, так как детали уже состарились. Также существуют квадратные шаблоны для оценки качества поверхности по количеству точек синей краски, а для тонкого снятия металла используют более мелкий скребок и метод соскабливания. Let me briefly outline what is missing. I had a good laugh: without Hoffman's rollers, nothing will work. You can skip this video if you don't have Hoffman's rollers; without them, you won't achieve results. You will need a regular bearing with cylindrical rolling elements - that's the secret. During grinding, the metal undergoes cutting, causing plastic deformation, with some metal being torn from the main mass while some remains. This affects precision due to surpassing the yield and ultimate strengths. Furthermore, consider metal aging and ambient temperature. Metal with different carbon content can deform with temperature changes. Metal aging is a crucial topic: after grinding, the metal changes its geometry due to internal stresses. Leaving the metal outside allows it to "settle," after which another layer is removed and the process is repeated. There are many aging methods worth exploring. Working with old machines is easier since the parts have already aged. Additionally, there are square templates to assess surface quality by the number of blue paint dots. For finer metal removal, a finer scraper and scraping technique are used.

To calculate no. Of teeth on gear formulas???

Nice straight forward no mess overview!

is the code on git? , this is dope af !

Excellent video on scraping. Thank you for your work!

Incredible that you didn’t give up, well done. What are your thoughts on creating a hobbyist 5axis compatible with the carvera air machine that has had a success kickstarter? Would you be interested? I think a lot more people are about to enter the machining space now that machines are more accessible, like what happened in 3D printing. My first thought without knowing much about 5-axis is the space limitations of that particular machine

I would think they would use a Blanchard grinder. The large rotating disk type. With a mag chuck on a carousel.

Great video. Cant doge the feeling that some talking head clips look color ungraded/too grey colors. Some more contrast and saturation would be nice.

Why not pay a mold making company to make some molds out of aluminium!? And why not machine the aluminium urself!? That machine would do it fine! Take the 5 axis head off, run it as 3axis so it's more rigid, just take ur time with the aluminium if it's hard to take deep cuts. I just feel like it's sooo silly to spend 10k building a 5axis to make molds without even knowing how molds are made and what material ul be making molds out of.. Just sounds odd Great project tho!

Autism brought me here.

OH DEAR - Let's Scrape for scrapings sake......?! THE ONLY TIME TO SCRAPE ANY WAY/SLIDING SURFACE IS WHERE IT IS UNDER HEAVY LOAD....... This is specifically WHY eg. MILL beds are not scraped but its knee ways and column are.... Scraping is DESIGNED to retain sub-decamicron amounts of way oil IN HYDROSTATIC COMPRESSION(pockets of oil under compression(like a ball SCREW in mechanical terms, for example). .... The reason WHY MILL TABLE SURFACES AREN'T SCRAPED IS BECAUSE YOU WANT AS MUCH STATIC FRICTION(AKA GRIP) UPON ITS SURFACE UNLIKE A WAY(including it's front and rear sides) ! Sorry for being blunt, but human time and energy are precious, and when it's misguided through ignorance, then that's tragic.. BTW The referencing to "Chinese..machines." inferring cheapness, is because we're too cheap(economic means, geographical locale..) to be able to purchase new top quality equipment. If one is on YT seeking knowledge in this field, then it's a given that we are amatuers, and have amatuer(hobby) machines. Thank you China for giving MILLIONS of peeps worldwide the chance to learn and develop their skills(on amatuer machines) which we can improve as do our skills) which serve INCREDIBLY PRACTICAL AND SUSTAINABLE REASONS. Rant over - Signed. A Machine Tool Fitter/Turner(Retired).

another key point for why 2 flat surfaces being bolted together need to be flat; it may seem flat and square to the naked eye when in reality it's sitting on 3 or 4 high spots. So you tighten and commision your machine, and after some use and vibration, those high spots disappear introducing backlash and error

I doubt if Chinese cast iron is stable enough in long term compare to Japs one. The casting technique, Chinese always cut cost.

I would think they have bad to no stress relief process it's then machined flat, then slowly moves and twists out of flat.

I watched all of your videos on this channel tonight. Awesome content. I subscribed and hope there is more to come. And, if you every need advise regarding 3D modeling, feel free to reach out. It's what I do for a living, and I love teaching the skill to others.

If I was building my machine again I would never use steppers. If you need any sort of accuracy forget it... unless you cut super slow. I can almost guarantee that this is the source of his accuracy issues. Not the rigidity (he's cutting plastic and wood...). Looks like he's using 5mm balls screws so he'll have to run the steppers fast just to get moderate speed. Steppers have all their torque at low speed and it drops quickly as speed increases. In other words, unless you cut at a snails pace it doesn't take much to make steppers miss steps and the tool can be a mm (or more) off by the end of the job. That's a lot for molds and patterns that need to fit together. There is a ton of bad advice online but telling everyone to use steppers in forums is the worst. If you're making molds and patterns... like this guy... get servos.

🤣 outro commect 😂 then i must have autism at highest level.. staying till the end and waiting for more to come at a black screen 🤪

Guys, a termendous amount of work and effort went into that, both from the effort scraping and documenting it - really appreciate that you've shared that knowledge and information - phenomenal job! Subscription worthy!

Did you try corian countertop material?

What software did you use to animate the videos showing the toolhead?

i made a moving table design, and i really have no complaints... i get the most stifnes out of that type of design...

Hi there, thx for the Video, one question: Why useing Steppers with Harmonic drives over servos? is this default design metric for a CNC Machnie and what Actuators where used for x y and z axis? Thx in advance

Very cool animations, what software did you use to generate them?

what if I need an RPM of 80-500? and lots of torque. 500 is quite a lot for a harmonic drive.

bmw e vanos uses a Harmonic Drive, i was so surprised when i saw one in real live use.

Awesome production value! Is there a reason to scrape the top of the bed? Seems like the ground surface is just fine because you'll probably be using a vice, which is locally as flat as you need. I understand scraping the bearing surfaces for flatness and allowing the bed to ride hydrodynamically on the way lube; it just feels extra to me.

Super quality production and narration! When I've seen tables like that being machined in China, they've typically had 16-24 (or more) lined up to be ground at once. Your center-right high spot might come from one of the huge grinder's own webbed table supports running directly below that part of your table.

I wish I would have 10 grand at 19 to build 5 axis CNC machine

Came here (to the channel) for the harmonic drive, stayed for the scraping. As someone else who learned from Marcus it was great to see so many of these concepts again, makes me want to come back and bring my mill table next time.

All of this effort,time and cost with a plastic vrnoer calipers, wow

Well done. I know its not a hard one, but anyone have the model?

Well done. Anyone have the model?

1. A “pro” would never get a hobby mill, let alone a trash one. 2. No one worth their labor rate would ever even consider scraping a mill table. It’s as if you just don’t understand...

Superbly done.

good job

When you do the hinge test (what you call the "pivot" test), the hinge/pivot points should be roughly 22% away from the ends. These are the Bessel/Airy points. If your part prints blue along the whole surface, and hinges at those points, you can be reasonably sure that it is flat.

I like you style. web style

I most likely got this recommended from my history with machining videos but your VFX and aesthetic is stunning, and right up my alley. Beautiful stuff- I've seen proper televised documentaries with worse VFX.

Awesome! What software was that animation created in?

I am struggling with machine configuration, please help me

Good job

As someone completely new to the DIY hobby but affine to 3D visualization I can only express my highest appreciation for both the effort you put into visualizing the 5-axis concepts you implemented as well as the effort you put into the project itself. Very inspiring!

Even though the result of a project you made didn't turn out to be useful in the area you hoped it would be useful for, what you learnt while making it, will stay with you till the end of your life and potentially make other projects significantly more doable for you. That alone, is orders of magnitude more valuable than the machine you've made. Incredibly impressive project. While on university, I wanted to make a simple 4 DOF robot arm (kinda of what you can now buy in kits these days, but it wasn't the case back then), but thinking about the challenges that would come with kinematics ( really wanted the tool end linear movement approximation) made me abandon the project. You did that as if it was nothing, and way ore than that. Incredible skill. Congratulations!

From building milling machines professionally: If you can - by any means - make it more rigid, make it more rigid! Make it more rigid until there is no crane that can lift it, no truck that can carry it, no servo that can move its axis, no customer that can pay for it and then back off about 15%.

Back in the day tables and slideways were usually done with a planer. Its very slow by todays standards, but probably as fast as grinding and has no tooling costs and makes flat surfaces with exceptional finishes. Youll notice planed tables by the stripes/lines in the finish

It's all about the journey and not so much the destination? ; )

Great video, thanks. I can only hope that you are using your skills you acquired with designing 5 axis, in your day job.

Respect ! came across your video, awsome work !

just brilliant! subbed clicked the bell etc etc v v v cool man

I've got a feeling you're going to see some channel growth real soon.