You should always use a granite surface plate desk, even in the kitchen! I sleep on a granite surface plate to make sure I get the most precise dreams ever, to within 3 microns.

@reps

5 жыл бұрын

@DeDeNoM

5 жыл бұрын

It also straightens out the back

@brainfornothing

5 жыл бұрын

​@@DeDeNoM ...Or make a "C" with your column, if you sleep over your side. Cheers !

@bill605able

5 жыл бұрын

@@DeDeNoM Raises hell with the "roids" tho!

@subzeronitro4686

5 жыл бұрын

@@reps EVERYTHING IS CROOKED! REALITY IS POISON! *LAMBS TO THE COSMIC SLAUGHTER*! I've seen that scene at least 5 times this week because it keeps popping up in KZread for me.

Hey Marco, the Steinmeyer ball screws are induction hardened as well (only the threads up to a few mm depth into the material). They also start as rolled part but then they get precision ground to fit to the pitch within tolerance (as low as a few µm). Of course the abrasive grinding will heat up the thread but they balance the cutting depth to control the soft-annealing. So no worries - they will hold up fine.

That's going to be one hell of a PCB etcher

@nothanks7752

5 жыл бұрын

the worlds most expensive dickbutt plotter

@you_just

4 жыл бұрын

Can’t wait to see the 1:100000 scale city that he etches.

I just love how you worked that ad right in there. Smooth as butter i didn’t see it coming and then BAMM like a freight train.

Finally a new video! I'm so happy to see your CNC machine coming together😍 can't wait to see those beauty in action

YESSS! I freaking LOVE your videos!!!

Thank you so much. You saved me a lot of time. Going to replace my end bearings and get that Tiny FPGA kit now! Excellent.

Marco we see so much stuff in your videos we cant find nowhere else..TY.

@Audio_Simon

5 жыл бұрын

And cant afford haha!

More, please sir! One of my favorite channels.

Oh finally a new video. 😀

@ZeroMass

5 жыл бұрын

Just found this channel... Been binge watching since : )

Finally, a new video!! I was getting really tired of watching reruns and can't seem to get my fix anywhere else! I just got my MK3 Extended last week and already started my collection of cheap Chinese knock-offs….I'm in too deep already and obsession/fascination with Micro Reps isn't going away..one video every couple months just won't suffice!

Thank you for the unfiltered sharing of information. It is quite refreshing.

bearing blocks on linear rails must have a certain amount of preload to give you accuracy and rigidity under load. that's why a new linear blocks don't slide freely and have some amount of friction. (and that used rails from industrial machines slides freely just because they are WORN OUT and lost their preload. that's why they was removed and replaced with new ones)

@reps

5 жыл бұрын

Sounds all correct! The banggood ones however have an uneven friction and seem to get caught on some high spots. And since hobby stuff is the only area where you would consider used rails anyway I think even the most worn-out ones will be easily good enough? Maybe I can find a way to actually measure my worn-out Rexroths ...

@mariusb6035

5 жыл бұрын

@@reps I've recently bought some used miniature Bosch rexroth linear guides (size 15, 4 bearings, 2x330mm rails) from ebay, alongside 500 steel bearing balls. Had to replace the old balls and even replaced the new ones multiple times until I found a "good batch" of those cheap balls that were running smoothly with slight preload. All in all this costs me 120€ compared to new ones from Bosch for over 500€

@michaelkelly3158

5 жыл бұрын

@@mariusb6035 How do these Bosch rails compare to Hiwin rails? Only ever heard of Hiwin rails being used in high end CNC applications.

@mariusb6035

5 жыл бұрын

@@michaelkelly3158 the original Bosch rails are very similar to hiwin rails. You'd have to compare lifetime, friction or other technical properties in a specific use case. Just saying "these are better" is impossible. As long as you get new brand name rails (hiwin, Bosch, SKF, Schneeberger,...) you should be good to go for any hobby project.

@jubjuber1

5 жыл бұрын

I have some cheap Chinese linear rails in a 20mm size. They run kind of rough but don't seem like it's specific high spots. Do you think taking them apart and cleaning would help smooth out the motion? I kind of suspect it's small particles in side the carriages are causing it to stick

Nice to hear from you again Thanks for sharing👍😀

A new video from Mr Reps makes my day.

Good humour and technical knowledge. Subbed.

Your videos are awesome, I can't believe I hadn't discovered these sooner, bravo.

As usual, a hilariously instructive video, thank you MUCH!

Excellent breakdown and explanation with valuable tips and tricks for the aspiring CNC machine builder. Thank you. Subscribed.

I'm really glad I'm subscribed to this channel. I feel like the humor here is within the same vein as This Old Tony.

6:04 When a ballscrew shaft is ground, the metal can already be very hard prior to grinding and the resulting screw can be far superior than a ballscrew that gets some hardening in its roll forming process.

The lubrication sounds are very inspiring. Fruits & vegetables are good for you, Marco!

I could listen to you say "steinmeyer ballscrews" over and over on repeat endlessly. I wish I had your voice, fantastic vid

@jenskapmeyer2579

2 жыл бұрын

That's how we Germans say it ... 😀

Always interesting ! In my experience, too much precision is useless, because, at the end, the total deflexion of the structure, leadscrews, the motor head, the tool, etc. is very significant, but, of course, "too much precision" is better than "meh!". I'm saving money for the parts of my next CNC router. Thanks for sharing !

Holy Bleep. Awesome video!!! Awesome technical detail and heavy with the lols. Nightmare fuel lol.

Pretty amazing stuff, man! 😮

thank you for the lesson in angular contact bearings

I know it's been a while but at my job we have what is essentially a large pair of calipers to calibrate cinema cameras. In order to discover and correct for long distance accuracy we use the distance traveled and revolutions of the motor. It uses a belt and pulley along with a very nice absolute encoder. We note the error (difference) of where it ended up vs the target and use the encoder resolution as well as the revolutions of the pulley. So if the machine was 0.015" off we would use that distance multiplied by the ticks/mm of the encoder (a constant), divided by the number of revolutions made during the move. This would give us a long range error correction value that the machine can compensate with. Essentially the number of encoder ticks it should increase or decrease by with every revolution of the pulley. I believe a similar calibration technique could be used with a ball screw mechanism.

I think it's important to note that the final hardening comes just before grinding (which happens after rolling in the case of rolled ball screws) and so the effect of surface hardening is minimal compared to the higher precision and therefore tolerances of purely ground ball screws.

Nice to see some SMC stuff in the video. I have never used anything from them other than pneumatics but i got a tour around one factorie and they do make very high quality stuff....

Your videos are usually pretty funny, but that joke at the end about rails getting replaced preemptively in industrial settings was hilarious.

@adisharr

5 жыл бұрын

Bigger companies do this all the time. Regular maintenance is important when your Nestle and bottling 10's of thousands of water bottles a day.

@MarksmenTM

5 жыл бұрын

@@adisharr I am not sure if you have ever replaced a ball screw, but it doesn't sound like it.

@SystemsPlanet

4 жыл бұрын

Can you please explain the inside baseball joke to the non players?

@panaxion

4 жыл бұрын

@@SystemsPlanet Most industrial machines (outside Germany at least) get run to death, rarely get the love or greasing they should.

@siggyincr7447

4 жыл бұрын

Depends a lot on the application, but most companies will replace ball screws when it starts causing problems. If it's in a machine that NEEDS to run without a hitch, consumables will generally get replaced or at least checked for wear on a predetermined schedule. I used to work for a company that would always have a maintenance crew scheduled for holidays so they could do that sort of thing without creating excessive downtime.

Funny , ohh the humor , most excellent content. This is exactly the info I was looking for as I'm currently trying to repair a TL-1 Lathe : )

When you go below 1um accuracy you start getting weird effects like the heat from your body causing thermal expansion.

@operator8014

5 жыл бұрын

I want to see someone use laser interferometry to measure the position to kick off the next generation of hyper accurate making.

@CNCGuy

5 жыл бұрын

@@operator8014 Your in luck I happen to be in charge of the cnc department of Infinity Drain. We have brand new AMS Loader from Amada paired to our 4kw Laser. The Loader uses just that to tell where the pallet traverser is and to also measure sheet material thickness.

@brianjensen5200

5 жыл бұрын

@@operator8014 already done. We use those at my work. Picometer accuracy. It's a pain though, as in Australia this accuracy encoder systems requires defence approval. We had one system fail, and I had to arrange approval from ministry of defence to be able to send it back to the manufacturer for repair.

@evildrome

5 жыл бұрын

@@brianjensen5200 Does everything run in a temperature controlled oil bath? I saw a video from Mitutoyo and that's how they keep their master leadscrew at a fixed temperature when screw cutting.

@brianjensen5200

5 жыл бұрын

@@evildrome no our motion stages are in free air. We keep the technical hall under 1K temperature deviation and encoder feedback loop controls the rest

Came for the precision, subscribed for the humour! Nice and dry, just how I like it.

Beautiful, thanks for sharing.

OMG this channel is awesome!! Subbed!

Love your commentary!

I was just pooping and was searching for some video to watch on the meantime.. And then I saw that you uploaded a new video! That was the best poop I had this year, thank you!

@reps

5 жыл бұрын

Good to know!

@cfeigel

5 жыл бұрын

Er . . . too much to know.

German precision oozing out of this video. I had a German accent for an hour after watching this. Love this channel! Subscribed!

@bendito999

4 жыл бұрын

Precision wood block table

Another great vid. Subscribed!

Beautiful video mate:)

To measure long distances you could attach levers to the encoder. It's the same technique that people used back in the day to convert large movements into small ones for precise machining. You'd be trading micrometer precision for mm or cm precision though.

Had no idea FPGAs could be so adorable. I need to dust off some micro-controller unworthy projects and exchange some financial details with Elektor.

@AttilaAsztalos

5 жыл бұрын

Elektor: "only 0 left" Me: "oh great... fuck my life." My wallet: *quiet sigh of relief*

@rusticagenerica

4 жыл бұрын

I can confirm that in 2025, FPGAs will go beying Kittens in the minds of serial-video-watchers.

Very good video! It made me feel dumb, but motivated me to learn this stuff!

Technical, and pretty funny. I love your style and hard German accent.

Here in Vietnam we can get those linear rail and ball screw second hand for dirt cheap. They are often disassembled from old machines. Just got a pair of unused IKO LWA15 rails and NSK 1602 ball screw for like $40. $200 can get you a nice 400w servo with driver from Japanese brand like Yakaswa.

Very good. I like your sense of humor too.

Linear rails have different amount of preload and various combinations of seals that will affect how easy they slide.

keep the good work up!

Precision engineering with German precision dry humour. God I love this guy!

Very informative. Thanks.

Yesss another upload

super valuable information, thank you

You are such a knowledgeable and funny guy.

I love your videos dude.

That tiny FPGA thing... I didn't knew such a thing existed! That's the size of an Arduino nano!

I used to work with these in laser trimmers and C02 lasers. The C02 had a 200 pound polished slab of granite that everything was mounted on

My first video, instantly subcribed! Thanks!

Great video!

I love the shot at 3:37 where you can see a die with all the traces allong it.

Informative and entertaining. Many thanks

Nice video! And thank you for the nice tips! But are you sure you're going to enjoy those microns with the rigidity of steel frames? Have you considered filling granite on the voids?

Made with carbon metal not a trace of cabon wood LMAO

Hello, it's my first comment here.. First of all love your channel...So I am writing aboute the "el chepo chinese linear rails" i've bought some more then a year ago.. Frustrated over the laggy performance, etc... Solution disassemble the carriage submerge in alcohol (to clean some wierd oils inside) reassemble, greas up... It worked for me... Still going strong after a year or so of modernet to heavy use..

A simple laser interferometer can be used to measure accuracy over long distances. All you have to do is to program maybe an arduino to count how many times the interference pattern cycles. The accuracy may not be great because you can't really properly calibrate it but it should be super precise, as long as you don't loose count.

Whoa that SMC card motor is just so cool!

Awesome Work....!!

Marco Reps, Where do you find secondhand linear rails and carriages?

Informative and hilarious!

this is really informative

One way I could think of measuring long distance movement, would be measuring rotation shaft movement vs fixed point via laser distance sensor.

At last sir... A New Video!

I have never learned so much while laughing so hard. Precision comedy dude. 🧐😂

thank you youtube rabbit hole...found this amazing channel

Is that thing at 1:36 the "Big Wooden CNC" from one of your older Videos?

What precision class are your ball screws as in c5 c3 or even c0

Hi. I need to know the name of i strument you used of mesure ment in micron.

Looking for my first cnc machine. What will you suggest to look for when selecting a complete out of the kit cnc machine? BTW, love your video very informative.

Very nice video! Where do you find all of those second hand linear rails etc.?

How do you measure what type of ball screws I have already on my mill! When I measure I have 5 turns per inch but how do you measure pitch? I don’t see anything stamped in the nut holder thingy

since you live in germany, you can get mineral castings for the cnc machine done from EPUCRETE or now called RAMPF.

Great video thanks

Your hilarious great job I learned allot

best video ever. inspired me to study engineering and will build a machine.

Regarding the linear railways. Did you check the preload of the blocks?. Usually some friction is a sign of a good system that could be able to transfer vibrations to the machine block.

this video after i watched made me feel screwed with. thanks for the fun times excellent video

The qualifying test for becoming a marine artificer in the royal navy in the 1970s was to build a miniature metal lathe. By hand from scratch, to a maximum accuracy of so many thou. Apparently creating those jack screws and whatever they made to run along it is tricky.

Your back!

That tiny fpga looks f*n cool !

That's some quality hardware! I'm only worried a bit about this Z axis, it looks going to be 2-3 times longer than spacing between rails, this will amplify load on the rails, and then amplify deflection at the tip of an end mill even more. I might be overthinking it but i'd be tempted to make something like Okuma double column machining center.

@reps

5 жыл бұрын

Valid point!

For the love of god I hope you've picked up Fusion by now :) Cool videos, keep it up !

Great video! How do you differentiate between the fake hiwins and the real hiwins?

died during the sound sample ... you are tearing me apart ... marco :3

Can you give some guidance on how you came to this high precision control system?

Marco, I enjoy your videos. How did you learn about mechanical design with ball screws? Can you recommend a book that has best practices?

@incodewetrust8862

5 жыл бұрын

If ever find a good book i would like to know too

Those forbidden dreams of precision 😄

Can you please tell me from where i can purchase these second hand rails? Thank you

Yep, turning the nut is tricky. It takes a while turning it back and forth to be ‘happy’ again. For a while it was trying to force out the plastic seal. At one end the plastic seal is held in by two tiny grub screws.

What's the amount of the slow drift? Steel has a coefficient of linear expansion of ~10-12 microns/meter/degrees c, so temperature expansion vs the desk should certainly shown up on your micron scale.

@TomFYouTube

2 жыл бұрын

I am also German but have been living in the US for over 40yrs. I am looking to build a reasonably priced desktop machine to route/mill parts for my hobby. Why is it that I am also obsessed with precision and worry about thermal expansion of materials? I guess it’s in my genes? 🤪

this is excellent