Hey Cylo, it also looks like you are using intermittent coolant spray and may have some built up edge on the tool nose. It would probably be better to have a steady stream of coolant to add a continuous tool deflection and reduce the material gathering on the tool edge.
We recently added a pressurized reservoir for the mineral spirits with evened out the flow. It’s less built up edge and more chips just piling up on top. Finding the correct angle to put the nozzle at is an art in and of itself!
Just curious if you realise that telescopes use mirrors made of glass with a superthin layer of aluminum applied to the surface. Spherical mirrors are far easier to shape than parabolic ones (and far cheaper to make) but parabolic mirrors are far better. A small 4.5" parabolic mirror costs more than 100$ and the price goes up exponentially : for a 10" mirror prices are well above 1000$. You're sitting on a Gold-mine if you can achieve creating parabolic mirrors from a simple piece of aluminium 😮
Yes, just set your tool height correct to less than a micron. I’ve not done this yet so I just relieve the center to avoid potentially harming the tool
got ya that front fender looked identical hmm maybe its used cross mfg group. love the videos its nice to see someone else utilize real text books thanks for the mind expanding creative content its welcomed and more of it needed@@cylosgarage
Hello Cylo, I am glad to see that your project is going well. I was wondering If you would be interested in helping me machine a few parts for a gear hobbling machine. I have a high tolerance requirement due to the small modulus involved. I mainly need a spindle and a way of holding the hob. Is this something that you are willing to assist me with me? Regards
Aluminum pretty much instantly creates a nanometer scale clear oxide layer in the atmosphere. It generally stays shiny unless exposed to other nasty stuff.
@@cylosgarage Strange. When i turn aluminium on my normal lathe it seams to get a dull gray finish within seconds of turning it. It looks pretty shiny at first and then turns dull gray pretty fast from what i can see when i am turning aluminium.
@@titter3648 He is using a highly specialized setup with a diamond tipped tool to produce optical surfaces directly from the machining process (no polishing)!
So sick. Awesome job on building such an accurate lathe.
This is so awesome, I would love to see a longer video of just playing with the reflections off this thing
The parabola is sooo interesting. are hypnrbolic mirrors also in line?
Yes! I want to make a cassegrain telescope with this
@@cylosgarage I sincerely envy you =)
Surely you will be doing a binocular version.
With such equipment, it is quite feasible ;)
@@sl_st Keck here we come
Wow!
Can you somehow turn glas on that lathe?
Would be awesom to build parabolic mirrors for telescopes.
Would you consider trying to do a really high frequency sine wave? something close to a wavelength of light?
How tf would you do that, bet his encoders don't even get near the resolution to match the wavelength of visible light
@@kkuhn visible light is pretty big
Mine have a resolution of 2nm. 1/250th of a wavelength of visible light 😘
I'd be really curious to see if you can somehow leverage that to play with fun interference / thin film / physical colour effects @@cylosgarage
gonna need a diamond tool with a radius smaller than the wavelength your trying to make. The smallest we can make a radius is around 200nm
Looks super cool! How long does it take in total?
I think the cycle time was around 45 minutes in total
@@cylosgarage That's a lot less than I would have guessed. 😮
Hey Cylo, it also looks like you are using intermittent coolant spray and may have some built up edge on the tool nose. It would probably be better to have a steady stream of coolant to add a continuous tool deflection and reduce the material gathering on the tool edge.
We recently added a pressurized reservoir for the mineral spirits with evened out the flow. It’s less built up edge and more chips just piling up on top. Finding the correct angle to put the nozzle at is an art in and of itself!
@@cylosgarage what is the RMS/Ra value you are targeting for your optic?
@@kieranmoon17 shooting for 5nm Ra
what is this aluminum, is it some aluminium alloy? 🤔 jokes aside, that looks really cool!
HIGH STRENGTH AEROSPACE GRADE ALUMINUM BILLET! (it’s 6061)
Just curious if you realise that telescopes use mirrors made of glass with a superthin layer of aluminum applied to the surface.
Spherical mirrors are far easier to shape than parabolic ones (and far cheaper to make) but parabolic mirrors are far better. A small 4.5" parabolic mirror costs more than 100$ and the price goes up exponentially : for a 10" mirror prices are well above 1000$. You're sitting on a Gold-mine if you can achieve creating parabolic mirrors from a simple piece of aluminium 😮
Is there any way to avoid the central point ?
Yes, just set your tool height correct to less than a micron. I’ve not done this yet so I just relieve the center to avoid potentially harming the tool
Thanks@@cylosgarage
no problem big boss
How are you going to protect it from oxidization?
It really won’t oxidize as long as I store it in a controlled environment. Aluminum is pretty inert
do i see an aprilia sxv?
The bike? It’s an MZ something or other. It’s a friend’s
got ya that front fender looked identical hmm maybe its used cross mfg group. love the videos its nice to see someone else utilize real text books thanks for the mind expanding creative content its welcomed and more of it needed@@cylosgarage
"Flat to 4/10ths" four tenths of what?
A “Tenth” refers to .0001 inches. Weird imperial system slang. So flat to .0004”, or 10 microns
Cool stuff
Hello Cylo,
I am glad to see that your project is going well.
I was wondering If you would be interested in helping me machine a few parts for a gear hobbling machine.
I have a high tolerance requirement due to the small modulus involved.
I mainly need a spindle and a way of holding the hob.
Is this something that you are willing to assist me with me?
Regards
Sure shoot me an email: cyruslloyd4@gmail.com
@@wazaagbreak-head6039 lol you alright?
I'm anxious to see what your next obsession is going to be
nifty
how does the aluminium not oxidize and turn dull gray?
Aluminum pretty much instantly creates a nanometer scale clear oxide layer in the atmosphere. It generally stays shiny unless exposed to other nasty stuff.
@@cylosgarage Strange. When i turn aluminium on my normal lathe it seams to get a dull gray finish within seconds of turning it. It looks pretty shiny at first and then turns dull gray pretty fast from what i can see when i am turning aluminium.
@@titter3648 He is using a highly specialized setup with a diamond tipped tool to produce optical surfaces directly from the machining process (no polishing)!