cercon dugudent, this is the rated resolution, how ever the bit its self is clearly much larger. And a work area of 1cm in its original configuration doesnt make this completely a crazy claim by industry standards.
A new mini CNC mill and rebuildingy style) and in the process of building my old one.
- Thread starter Flateric
- Start date
I work at an aerospace Machine shop. In quality
In Machine shop lingo:
"100 thou" = .1000
"10 thou" = .0100
"1 thou" =.0010
"1 tenth" =.0001
1 micro inch = .000001
and 1 micron = 39.37007874 micro inches.
So the machine is 118.1 micro inches accurate? thats .0001 ("1 tenth")
I highly doubt its that accurate. What is its repeatability?
We just bought a brand new okuma genos m460-ve. and the specs on that are like .0002 accuracy, and .00007 repeatablility? Even tho I know it does better. just seems hard to believe. when this thing has thermal compensation. and all the other gadgets a new machine comes with. Maybe thats just the differance between Dental, and aerospace.
Not to steal your thunder lol:
Okuma
Turning center
---------- Post added at 04:26 PM ---------- Previous post was at 04:16 PM ----------
Bridgeports only get used in this shop:
Here are all my Mills :evil2:
In Machine shop lingo:
"100 thou" = .1000
"10 thou" = .0100
"1 thou" =.0010
"1 tenth" =.0001
1 micro inch = .000001
and 1 micron = 39.37007874 micro inches.
So the machine is 118.1 micro inches accurate? thats .0001 ("1 tenth")
I highly doubt its that accurate. What is its repeatability?
We just bought a brand new okuma genos m460-ve. and the specs on that are like .0002 accuracy, and .00007 repeatablility? Even tho I know it does better. just seems hard to believe. when this thing has thermal compensation. and all the other gadgets a new machine comes with. Maybe thats just the differance between Dental, and aerospace.
Not to steal your thunder lol:
Okuma
Turning center
---------- Post added at 04:26 PM ---------- Previous post was at 04:16 PM ----------
IJ.;1620045 said:I have a big centre lathe with a DRO and am looking at a new VMC that dwarfs the old Mill
(you know you're welcome to drop by to play anytime)
Always been limited by space at the old house no such limitations at the new house!
I'm guessing you're a member over at CNC Zone??
Bridgeports only get used in this shop:
Here are all my Mills :evil2:
Albert, you machinsts didn't listen in math classes, did you? 
Some nice equipment in here gentlemen (not penis envy DT... ok, maybe a little), and I gotta give Flateric some credit for making a mill/cnc out of things that clearly were not meant for such work. A photocopier? A freaking PHOTOCOPIER? That's awesome man. :rofl:
Some nice equipment in here gentlemen (not penis envy DT... ok, maybe a little), and I gotta give Flateric some credit for making a mill/cnc out of things that clearly were not meant for such work. A photocopier? A freaking PHOTOCOPIER? That's awesome man. :rofl:
I had typed a big thing here, but ya, my initial machine and electronics were all sourced from entirely out of photocopiers. I didn't have any previous education or machinist experience of any kind previously.
But love seeing all these machines regardless. I can drool, but I'm on a budget of nothing literally so I must make do with what I have got to work with and wait till better comes along to improve my situation. I actually rather do enjoy it this way and I really get to know the machine, electronics, techniques etc because I literally have too since I don't really even have anyone to poke for help.
But on the dentist unit / scanner. I wanted to double check to be sure I was not mistaken and it appears I was off by a few microns, litterally just a few though. The scanner claims 10 micron or less scanning accuracy.......
Directly from the spec sheet off their page....
The Cercon eye scans dies and models for crowns, bridges and abutments using a three camera system as well as a laser, which can precisely map up to 16 units per model. Automatic margin detection enables ease of case design. Coping thickness, margins and occlusion can all be adjusted. With a scan time of less than 20 seconds per unit, and a scanning precision of 10 microns or less, even difficult model geometries, such as undercuts, are easily read. The art software also provides the ability to design a crown to full contour and cutback in specific measured amounts.
And info on the milling machine that accompanies it........
Marginal gaps of
50 microns or better are consistently achievable. Marginal integrity has been evaluated to be of the order of 30
microns for crowns and bridges
And......
Fig. 12: Average marginal openings for Cercon restorations are in the 30 micron range
In
and....
Cercon brain expert mills nestable discs for increased efficiency. ... in optimal accuracy and precision with a marginal fit of 25 microns or less,
and an independant lab tests quote.....
Accuracy is measured
by the ability for a bur to achieve the same
position repeatedly, and today’s milling machines
have a repeatability of about 20 microns. The
��������������������������������������������������������������������������������������������������������
free linear induction motors that are steered by
magnets (Image 22������������������������������������������������������������
an accuracy of about 2 microns. While this is
����������������������������������������������������������������������������������������������������������
one more factor that affects the fit of the final
restoration.
If you really want i can give you the exact references to the links and quotes, but i don't care enough to put in more effort currently. But it appears my initial statement was not inaccurate.
But love seeing all these machines regardless. I can drool, but I'm on a budget of nothing literally so I must make do with what I have got to work with and wait till better comes along to improve my situation. I actually rather do enjoy it this way and I really get to know the machine, electronics, techniques etc because I literally have too since I don't really even have anyone to poke for help.
But on the dentist unit / scanner. I wanted to double check to be sure I was not mistaken and it appears I was off by a few microns, litterally just a few though. The scanner claims 10 micron or less scanning accuracy.......
Directly from the spec sheet off their page....
The Cercon eye scans dies and models for crowns, bridges and abutments using a three camera system as well as a laser, which can precisely map up to 16 units per model. Automatic margin detection enables ease of case design. Coping thickness, margins and occlusion can all be adjusted. With a scan time of less than 20 seconds per unit, and a scanning precision of 10 microns or less, even difficult model geometries, such as undercuts, are easily read. The art software also provides the ability to design a crown to full contour and cutback in specific measured amounts.
And info on the milling machine that accompanies it........
Marginal gaps of
50 microns or better are consistently achievable. Marginal integrity has been evaluated to be of the order of 30
microns for crowns and bridges
And......
Fig. 12: Average marginal openings for Cercon restorations are in the 30 micron range
In
and....
Cercon brain expert mills nestable discs for increased efficiency. ... in optimal accuracy and precision with a marginal fit of 25 microns or less,
and an independant lab tests quote.....
Accuracy is measured
by the ability for a bur to achieve the same
position repeatedly, and today’s milling machines
have a repeatability of about 20 microns. The
��������������������������������������������������������������������������������������������������������
free linear induction motors that are steered by
magnets (Image 22������������������������������������������������������������
an accuracy of about 2 microns. While this is
����������������������������������������������������������������������������������������������������������
one more factor that affects the fit of the final
restoration.
If you really want i can give you the exact references to the links and quotes, but i don't care enough to put in more effort currently. But it appears my initial statement was not inaccurate.
We have a program that is using a Mori Seiki NN1000 “Nano-Mill”. This is a 5-axis nano CNC machine capable of holding tolerances to submicron accuracy and producing mirror surfaces without polishing (<10 nm Ra). Position sensors have 34 pm accuracy. There are four of these in the US, with two of them at UC Davis in California. We used a 200 micron diamond faced end mill to machine a structure with repeating 115 micron vanes. Tools down to 5 micron diameter are available. Some pictures here if interested. http://ims.engr.ucdavis.edu/facilities.html
I have an angle grinder and a burr bit for my die grinder, which achieves a lot of shit being flicked in my eyes and the accuracy varies according to how many bourbans i've had over a certain time period.:naughty:
3p141592654;1760428 said:
Thanks for chiming in with that, cool stuff there! And also nice to hear from someone else that I may not have been talking out my ass like they were trying to say I was.
My god I don't think I would ever go home if I worked where you do. Amazing machines dude!
W7, bourbans? I'll pour myself a bourbon and go find out what that is!
Flateric, I don't work there, just send them checks so they can send us some nice parts.
Flateric, I don't work there, just send them checks so they can send us some nice parts.
I'd like ot see some pics of the Micron tooling beside a conventional milling cutter if possible 3P
(always been fascinated at how they make/sharpen these teeny critters!)
(always been fascinated at how they make/sharpen these teeny critters!)
Here is a link to an article that discusses cutting bit that can achieve accuracy down to "1 nanometre" Wow, thats just nuts!
http://webdocs.cs.ualberta.ca/~database/MEMS/sma_mems/mems.html
In particular check the pics with the gears, such as the last pic in the article of a one way turning gear. Really cool. Amazing, now how do we properly lube these damn things up? LOL
http://webdocs.cs.ualberta.ca/~database/MEMS/sma_mems/mems.html
In particular check the pics with the gears, such as the last pic in the article of a one way turning gear. Really cool. Amazing, now how do we properly lube these damn things up? LOL
I actually work with an ion milling machine that could be used for MIMS (we don't do it where I work however). The accuracy of the cuts on those is amazing.
What you are showing there is MEMS, which is more like a photolithographic process, similar to IC fabrication. We do a lot of MEMS work here but it has severe limitations when it comes to the what you can do in the vertical dimension. That is the beauty of these nano-mills, as they achieve close to the tolerances of the MEMS processes, but have the flexibility to make vertical features with a lot of control.
Tried some mini aluminium milling last night on the challenge from a friend that anything really small would just turn out like a lump. I definitely can see some slop in my precision but overall am pleased. This is the big machine after all and not at all well suited to this miniture work. That'll be for the minimill yet to be built.
Anyways here's two pics could use this turbo with a really really small motor.
Anyways here's two pics could use this turbo with a really really small motor.