CNC milling glass plates and mirrors
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- Опубликовано: 21 авг 2011
- I've been cutting glass plates and mirrors with my CNC milling machine machine for years. In this video, I describe a few tips and the general technique that I use.
Clamping the glass plate to the table is the critical part of the process, and so I built a jig that allows the glass to be held laterally with shims, but does not require a high clamping force, which would crack the glass.
Cutting parameters:
.085" dia diamond burr
3000 RPM
1-3 inches per minute feed
Cut depth .130" (full material thickness)
Flood coolant with soluble oil cutting fluid
benkrasnow.blogspot.com/2011/0...
benkrasnow.blogspot.com/2008/0... 
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Hey there -- got to this video from Reddit. Thanks for posting, I'm looking to do something similar on an upcoming project
State of the Art Tooling with 20 years of proven reliable experience (smile). Thank you for a helpful You Tube Post that is still helpful to us...9 years later. We appreciate you very much.
I still use a Sun PDP 11 running Fortran 77
Awesome ! Not that I'll ever do this, but it was great to watch and learn something new today : )
Very cool setup- super informative. you mention not to plunge into the material and I think that is very wise. thank you for sharing.
Great old machine .......... and I certainly had not considered this approach to glass - fascinating.
Very interesting video. The clamping technique is also nice, this helps my machining learning curve climbing ! thanks for sharing !
I run 4 haas at a glass company and we use wax to hold our parts together.. works really well but am in need of improvement or some insurance at least. Your jig would do the job.. going to order some acrylic tomorow and give it a try
What kind of spindle speeds and feed rates do you guys typically run? I'm also wondering how aggressive of a depth of cut I can get away with without destroying this piece of BK7.
most excellent thanks for sharing
Neato!
What a great video. Seen your all videos :) ... Greetings from Copenhagen, Denmark :) ..
love the tips. I have machined a lot of glass, different than yours, I use wax to hold it down on another (sacrificial) piece of glass. that way the cutting tool can go past what I am shaping. I use more precise tools than a diamond burr.
Would you like to name these "more precise tools than a diamond burr"?
Do you still have that mill? Very interesting stuff!!
What coolant are you using and where do you buy it?
Did you cut the mirror in a single pass ? If not, what was your depth of cut per pass ? Beautiful job.
What is your spindle speed? I am going to try this on a 1997 Komo CNC. Please help
cool, but my friend just uses thin double sides tape to hold the glass down never has issues, but cool in your method to
what do you use the mirror for?
Nice! This screams for replication :). Who manufactures the diamond burr (mine seem all bit acentric) and how long it does (10s of cm or longer cut length) hold up?
You could also use vacuum cups to clamp the glas...
what did u use the mirror for?
It's a germanium coated mirror. Probably used for a Co2 laser or IR camera.
are u slotting completely or using a step over?
boss 8 controller? awesome.
is there not concern of diamond grit getting into the mill?
?? You mean glass grit?
That diamond isn't going anywhere if you don't damage it...
What if I want to cut a shallow hole in a mirror, say 0.5mm deep and 2.9mm diameter ?
Aren't there open source equivalents of Solidworks or Mastercam? Not necessarily free but I wouldn't doubt it.
I really enjoy your videos. Thank you. Do you offer apprenticeships?
I'm guessing this is anealed glass?
Do you think this would also work good with using ethanol for cooling? I never milled glass, but for metal i love to use ethanol, because its just gone when your done ;)
@@irn00bz0r2 I can't get out my head the number of times I have accidentally had the cutting head hit a random metal part on a hold-down. Sometimes it generates some real sparks. I can see how ethanol or Kerosene could be great in many ways but I like my shop flame-free.
Believe it or not, some of those old machines were controlled by paper tape with holes and then later, by the large 8" Floppy disc with the "giant" capacity of less than 1mb. That's back when they were referred to as "NC" machines and opposed to "CNC" machines.
This sounds like a grinding operation, rather than cutting. 3000rpm seems to be a slow cutting speed for a .085 diam. I trained as a machinist/tool maker, so this is more of an exp dialog.
What RPM do you run this at?
KTM Jockey A few thousand RPM. I'd probably go faster if my mill were able. As long as you can keep the cut area flooded with coolant, that tiny diamond burr can be spun really fast without damage.
Thanks!
Hmm...I've seen cold mirrors before, but not like that.
How would you machine glass on a lathe? Pretty much the same methodology?
Dash Lambda Nooooooooooo Glass is way too brittle for that, the rotation alone would probably shatter it and it's a crystalline structure, it won't shave off like wood or metals
dwoodsky
I'm not sure about the rotation, but I'm sure the actual bit could be abrasive like the diamond burr bit this guy is using in a mill...
I wonder if the glass would actually shatter from the rotation... It would stand to reason that it wouldn't with a good, well balanced lathe, but still...
You can make accurate curved like using the "score and break" method. Though it does take a decent amount of skill, it also depends on the glass composition and the thickness.
am trying to decide on a CNC setup for scoring stained glass. Got any suggestions?
There isnt anything on the web about it your right. Were all alone here
Love the old BP CNC mills. They used to do conversions of them back in the day before Bridgeport started making dedicated NC's. I always liked the series 2 because it has the taller riser and greater Z axis capacity, but had to stand on box to see the control face.
And they last forever. American made! Sweet! The Chinese frame machines are garbage.
Use Fusion 360! Free for hobbyist/startup, included CAM!
They announced yesterday that they're cutting out a lot of the capability in the hobbyist version. I just came across this video at the same time as I heard some news, so I thought I'd share.
What do you do for a living dude?
How did you start cutting the mirror using the dyamond drill bit? Did you start making a first drilling perpendicular to the mirror and continued cutting moving laterally or just did you start laterally from the beggining? It has any advantage this technique instead of using a waterjet? Thank you
Could you send me, if don't mind, an example of how CNC machine works with glass? Cutting, milling, engraving... Thank you
Water jet cutter is the tool for this particular job.
I thought this would be good for a stained-glass studio until I saw the feed rate, lol.
but wouldn't the feed rate be faster if only scoring the glass - pre-breaking?
@@fayette202 - That may be true.
Whats not understood is the clamp is really peculiar and it would restrict some of the cutting area. You cant an entire closed loop with this clamp.
Who would buy anything from Edmund? Their prices are literally 40 times higher than the Chinese optical shops.
lol he buys his programs. you could probably get an edu license because you are not selling your projects. i am sure one of those companies will sponsor you once they see your RUclips.
NIGGA WHAAAAAAT!?
"Google Fi" commercial on your YT video can get zucked, google is bad news. NO. Aside from that, wish I had a piece of that mirror for my laser pointer project.