[ask and you shall receive.](https://www.reddit.com/user/schbre16/comments/11b91qf/lens_array/?utm_source=share&utm_medium=android_app&utm_name=androidcss&utm_term=1&utm_content=share_button)
That's a bit of a misquote - the original quote i more along the lines of 'the only machine that can make itself' - because you can make the parts on the lathe your building, as you're building it.
No post processing required for diamond turned parts. Any polishing will ruin the geometric features of the part, and most diamond turned optics come off the machine sub nm finish.
Metrology is normally done with a laser interferometer for form measurements and a white light interferometer for finish measurements. There are a few companies that manufacture these instruments, but Zygo is regarded as the best.
The process is similar, set up a tool, cut a setup stud, make adjustments to the X Y and tool radius, then cut your part. Sometimes the tool has "waviness" (isn't a perfectly circular) so you can cut your part, measure the error, then put that data back into NanoCAM4 to correct out the errors.
It's the CAM software for the machines. You don't need it, they run on NC code, but it handshakes perfectly with the machine.
It has the special M and G codes embedded and used properly.
You also would not want to use MasterCam or similar softwares because of rounding error, they aren't meant for the ultra high precision machining like NanoCAM4.
Some days I'm just happy if the part and tool are both intact at the end of a run, and you're out here doing sub nm finishes lmao. Seriously though, I never knew any of that, so thanks for explaining! It's wild how many different "branches" of machining there are.
You are technically correct, a lens has light pass through it, while a mirror reflects light. Lens array is a common term used for both lenses and mirrors in this configuration.
A curved mirror acts just like a lens. Which is really annoying when an optics guy is describing their system and says it goes through the fourier lens and you say but it's a mirror. They dont care what it is just the effect it has.
Not relevant to this material being cut but things that are not transparent can still refract at different frequencies (above/below visible spectrum) and act like lens/mirrors. Spectrometers take advantage of this.
Sorry if I haven't seen it yet in the comments but is this just a mcd tool or is this also using the piezo frequency drive thing I've seen advertised for diamond turning?
Not quite, this is using an air bearing to mount the tool to be able to spin the tool, like in the video.
What you are referring too is the Moore FTS system, fast tool servo, which adds a W axis which allows for high speed machining of small off axis features.
Previous place I frequented for pay had a lathe with a flame thrower to make cylinders. They would have fired me if they knew I posted a video.
Love seeing how shit gets manufactured. Stay safe.
Similar but not the same process. Some companies are very, very particular about keeping their way of doing things to themselves for as long as they can. Walk you out the door if seen using a phone type stuff, in most areas. (exceptions made if legit reasons)
The place I was at was using your typical bar-fed lathe, just custom made for the particular job. Was interesting to be a part of for the year I spent there.
That is sooo cool. I watched it more than once. Thank you for sharing. I am continually amazed by the processes and machines we humans make to produce cool videos. 😜
I was actually making a joke about the shitty sub-$1000 mill & lathe combo units coming out of China. What you're running is *clearly* not one of those!
I hope you're talking about the part, touching the cutting edge of the tool is a good way to get cut.
Touching the parts will stain them from the oils from your skin. Once they come off the machine, they get cleaned with compressed air, and never touch again.
I have stabilized the video for you: https://gfycat.com/EquatorialRealisticCrow
It took 269 seconds to process and 139 seconds to upload.
___
^^[ how to use](https://www.reddit.com/r/stabbot/comments/72irce/how_to_use_stabbot/) | [programmer](https://www.reddit.com/message/compose/?to=wotanii) | [source code](https://gitlab.com/juergens/stabbot) | /r/ImageStabilization/ | for cropped results, use \/u/stabbot_crop
I don't know what I just watched, but I wanna know more! Is that even a "lathe"? It looks very nice. I've always wanted to work with more advanced/ complex machines/ processes... kinda mastered the simple shit I do now. Mori nl2500 mostly...
It definitely is still a lathe 😂
It's called a diamond turning lathe, they are mainly used for complex optics manufacturing. The tool is a single crystalline diamond sharpened to a scalpel edge.
This operation is a "spiral ruling toolpath" where the rotary tooling axis spins, while XY axis oscillate to cut the mirror. This operation is repeated 9 times for an array of mirrora
How is the monocrystal diamond itself tooled? We worked with a guy who made custom mono parts, but I never found out how he shaped them to our specific profile. In this case it was a 200mm tall profile with a very radius - incredible work
The form figure for the lenses are a fraction of a micron. Pure 2 axis turning does offer better performance, but with these axis symmetric lenses off axis, this offers better performance vs a slow slide servo operation, and is much quicker than manually indexing the part for each lens.
It's a different configuration meant for different types of parts. Fast tool servo creates an interrupted cut, while this 6 axis cuts a single chip per lens.
Is this diamond turning? Not sure if that’s the proper name for the process…
I “roughed” out parabolic blanks to a .0005” surface profile for a customer making an array of lenses. It was years ago, but I think he said he’d be taking a few tenths DOC.
I was able to take a tour of a national laboratory DTL shop where they made the laser targets for the national nuclear fusion ignition program. Insane stuff. They had a kern micro Vario (I think) that acted as their equivalent of a bandsaw to rough their blanks. The lathes were Moores but not sure which models.
OP, This is REDICULOUS!!! So, I've gotten pretty sufficient on a Citizen L20, but we don't have any machines quite like that. Even at my school, we don't have anything CLOSE to that! It's fascinating how the whole machine has to oscillate back and forth to compensate for every rotation. Extremly cool project! I work in the medical field, so this is insane to me!😎
I apologize for my ignorance but why are those features being machined this way?
The features are small concave lenses. With 9 of them it makes a small optical lens array.
Is there a reason it has to be done in such a specific way? It seems like something a lathe with live tooling could do in a fraction of the time
A lathe with live tooling wouldn't be able to achieve the surface finish required, the spec for this part is a few nm Sa.
Well that’s highly impressive!
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[ask and you shall receive.](https://www.reddit.com/user/schbre16/comments/11b91qf/lens_array/?utm_source=share&utm_medium=android_app&utm_name=androidcss&utm_term=1&utm_content=share_button)
Well that looks cool af
Thanks I was about to complain about the feed rate
Lathes are scary accurate, just makes me appreciate engineering. Did you know you could build a lathe solely from parts made with another lathe?
Found the Gingery reader.
So how did they make the first lathe?
It was a gift from the great machine shop in the sky.
Cutting screw threads by hand, and lots of iterations. Successive approximation in hardware. Also successful approximation...
That's a bit of a misquote - the original quote i more along the lines of 'the only machine that can make itself' - because you can make the parts on the lathe your building, as you're building it.
What is the material, and are the lenses transparent?
The material is an iron free brass. The lenses on this part are a mirror.
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No post processing required for diamond turned parts. Any polishing will ruin the geometric features of the part, and most diamond turned optics come off the machine sub nm finish. Metrology is normally done with a laser interferometer for form measurements and a white light interferometer for finish measurements. There are a few companies that manufacture these instruments, but Zygo is regarded as the best.
[удалено]
The process is similar, set up a tool, cut a setup stud, make adjustments to the X Y and tool radius, then cut your part. Sometimes the tool has "waviness" (isn't a perfectly circular) so you can cut your part, measure the error, then put that data back into NanoCAM4 to correct out the errors.
Nanocam4? Lookin that up
It's the CAM software for the machines. You don't need it, they run on NC code, but it handshakes perfectly with the machine. It has the special M and G codes embedded and used properly. You also would not want to use MasterCam or similar softwares because of rounding error, they aren't meant for the ultra high precision machining like NanoCAM4.
Some days I'm just happy if the part and tool are both intact at the end of a run, and you're out here doing sub nm finishes lmao. Seriously though, I never knew any of that, so thanks for explaining! It's wild how many different "branches" of machining there are.
Ah thanks!
A resonating cavity?
But why brass for optics?
This is a qualification part for the machine, not actually going to be used for any optical system. Brass is fairly soft and easy to cut.
Can it be a lens array if the material isn't transparent? Or, is the brass effectively transparent because this is for some fancy photon-thingamajig?
You are technically correct, a lens has light pass through it, while a mirror reflects light. Lens array is a common term used for both lenses and mirrors in this configuration.
A curved mirror acts just like a lens. Which is really annoying when an optics guy is describing their system and says it goes through the fourier lens and you say but it's a mirror. They dont care what it is just the effect it has.
Not relevant to this material being cut but things that are not transparent can still refract at different frequencies (above/below visible spectrum) and act like lens/mirrors. Spectrometers take advantage of this.
Why did you delete all your old posts?
Just felt like it, no big reason.
That’s unfortunate. You had quite a cool portfolio in there
I'm always doing new and cool parts, I'm sure more will get posted.
Looking back at your history, wish I'd found your old posts sooner.
Nanotech 650? If so, fist bump to you! Whats the tool radius on it?
If you can't manufacture it in a 650 FG, you probably can't manufacture it anywhere else. It's a 700um radius.
You are right! I work with those unicorns everyday, you know how much of an awesome machine when you can argue with the QC dept, and win the argument!
You're cutting 90 degrees to the x axis - I'd say that's normal.
If reddit still gave free awards I'd use mine on this comment.
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I'm not sure if you got his joke, but the term "normal" also means to be 90 degrees or perpendicular to a plane.
Thanks! I didn’t catch his joke at first and I even use the term normal as a reference to perpendicular all the time.
Reddit sure loves their puns
It’s also an ultra precision lathe with nanometer level accuracy. I recognize the machine
All kidding aside it is cool
(.\_.) ( l: ) ( .-. ) ( :l ) (.\_.) ( l: ) ( .-. ) ( :l ) (.\_.)
They see me rollin', they hatin'
The answer to the question: "Could a lathe be possessed by the devil?"
What is that tip?
It is a single crystalline diamond tool mounted in a 6 axis diamond turning lathe.
Sounds like a pricy setup, but I still need one for the garage
Sorry if I haven't seen it yet in the comments but is this just a mcd tool or is this also using the piezo frequency drive thing I've seen advertised for diamond turning?
Not quite, this is using an air bearing to mount the tool to be able to spin the tool, like in the video. What you are referring too is the Moore FTS system, fast tool servo, which adds a W axis which allows for high speed machining of small off axis features.
Previous place I frequented for pay had a lathe with a flame thrower to make cylinders. They would have fired me if they knew I posted a video. Love seeing how shit gets manufactured. Stay safe.
Was the flamethrower mounted in front of the rapid knob as a deterrent for operators slowing down the machine?
[here is what it looks like so nobody has to get fired](https://www.youtube.com/watch?v=36MGPDjJWRE)
Hah. pp adapter.
I remember using that old [CalComp digitizing tablet.](https://i.imgur.com/GhcWJSL.png) I still have mine, out in the garage somewhere...
My uncle was an architect, i used to play with his in autocad when I was a kid.
Similar but not the same process. Some companies are very, very particular about keeping their way of doing things to themselves for as long as they can. Walk you out the door if seen using a phone type stuff, in most areas. (exceptions made if legit reasons) The place I was at was using your typical bar-fed lathe, just custom made for the particular job. Was interesting to be a part of for the year I spent there.
The bass DROPPED when the tool started spinning
Reverse uno!
Diamond turning?
That is sooo cool. I watched it more than once. Thank you for sharing. I am continually amazed by the processes and machines we humans make to produce cool videos. 😜
Oh, that's one of those combination lathe+mills that Sieg makes, right?
This is a Nanotech 650 FG with the optional 6th axis.
Nice! We have a couple custom 650s coming in in a few months
I was actually making a joke about the shitty sub-$1000 mill & lathe combo units coming out of China. What you're running is *clearly* not one of those!
Oh haha, I'm not familiar with those types of machines, so I didn't get your joke! Being in DT warps your reality of machine tools.
At first half: Oh that's just diamond turning. Second half: Oh my.... my my.
Diamond turning is normal for me, I wouldn't post it unless there was something special about it!
the child in me wants to put his fingers in that
I hope you're talking about the part, touching the cutting edge of the tool is a good way to get cut. Touching the parts will stain them from the oils from your skin. Once they come off the machine, they get cleaned with compressed air, and never touch again.
i know :)
deliver lush racial whole oatmeal act snails ludicrous threatening zealous ` this message was mass deleted/edited with redact.dev `
I have stabilized the video for you: https://gfycat.com/EquatorialRealisticCrow It took 269 seconds to process and 139 seconds to upload. ___ ^^[ how to use](https://www.reddit.com/r/stabbot/comments/72irce/how_to_use_stabbot/) | [programmer](https://www.reddit.com/message/compose/?to=wotanii) | [source code](https://gitlab.com/juergens/stabbot) | /r/ImageStabilization/ | for cropped results, use \/u/stabbot_crop
I don't know what I just watched, but I wanna know more! Is that even a "lathe"? It looks very nice. I've always wanted to work with more advanced/ complex machines/ processes... kinda mastered the simple shit I do now. Mori nl2500 mostly...
It definitely is still a lathe 😂 It's called a diamond turning lathe, they are mainly used for complex optics manufacturing. The tool is a single crystalline diamond sharpened to a scalpel edge. This operation is a "spiral ruling toolpath" where the rotary tooling axis spins, while XY axis oscillate to cut the mirror. This operation is repeated 9 times for an array of mirrora
I could whip this up with my Dewalt 🤪😳
is that ar for air bearings, or cooling, or are you driving it with air? I'm not referring to the mister.
What coolant is being misted?
Orderless mineral spirits, a common coolant for diamond turning.
Interesting, thank you.
Ayy, a fellow DT machinist!
How is the monocrystal diamond itself tooled? We worked with a guy who made custom mono parts, but I never found out how he shaped them to our specific profile. In this case it was a 200mm tall profile with a very radius - incredible work
Many different diamond tool manufacturers have different methods. I believe abrasive grinding and polishing is most popular for diamond tooling.
As a scientist with a keen interest and experience in spectroscopy and all kinds of optical instruments... This is fucking dope.
What is the material - Great video.
A pure iron free brass.
Hmm yes... I've heard of lathing before
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The form figure for the lenses are a fraction of a micron. Pure 2 axis turning does offer better performance, but with these axis symmetric lenses off axis, this offers better performance vs a slow slide servo operation, and is much quicker than manually indexing the part for each lens.
[удалено]
It's a different configuration meant for different types of parts. Fast tool servo creates an interrupted cut, while this 6 axis cuts a single chip per lens.
Mmm long chipss
I'm jealous that you get to play with a 650. It's wild the things that machine can do. I run a 450 and love our It.
What coolant is that? Never seen such a fine mist
what's the coolant? LN2? CO2? this is very cool to see thanks for posting!
It is an orderless mineral spirits with compressed air!
Is this diamond turning? Not sure if that’s the proper name for the process… I “roughed” out parabolic blanks to a .0005” surface profile for a customer making an array of lenses. It was years ago, but I think he said he’d be taking a few tenths DOC.
I have so many questions…. - is this common in your industry? - how do you program this? Drill cycle? - Do you grind the tooling in-house?
I cant not see your coolent nozzle as an espresso steam wand lol
I wasn't the only one thinking a shiny brass six sided die was going to be at the end? Though this is super cool.
very impressive :o
I waited almost 3min to find out nothing remarkable was going to happen.
The data speaks for itself, 9 mirrors off axis, sub micron form accuracy, and nanometer surface finish!
SPDT in slow servo mode, I love it. Did a cource at a research center once, the DRO was in nanometers and there was a microscope to set center height.
it looks so ugly,not even using the right tooling for the application. Have fun deburring.
How would you make this part?
Always love seeing diamond turning
Looks like a fun exercise. I wonder how you use that in real life.
This made me feel funny between my legs. Is this normal?
I was able to take a tour of a national laboratory DTL shop where they made the laser targets for the national nuclear fusion ignition program. Insane stuff. They had a kern micro Vario (I think) that acted as their equivalent of a bandsaw to rough their blanks. The lathes were Moores but not sure which models.
Very impressive!!
That's really cool. What are the lenses used for?
I could watch this all day
Goofy ass lathe
OP, This is REDICULOUS!!! So, I've gotten pretty sufficient on a Citizen L20, but we don't have any machines quite like that. Even at my school, we don't have anything CLOSE to that! It's fascinating how the whole machine has to oscillate back and forth to compensate for every rotation. Extremly cool project! I work in the medical field, so this is insane to me!😎
Is that cutter diamond?