[walter]

.
A QUICK REVIEW, FOR THOSE JUST JOINING US! :stickpoke (group)


www.cncbridges.com - famous X2 Mini Mill, polymer concrete Base.

www.moglice.com - Castable Bearing and Machine Tool Repair Resin.

www.itwpolymercastings.com - Zanite, magic polymer composite!

www.accurescasting.com - "3 cu ft Filler kit for 360$ (435 lbs) -epoxy included"- message#10.

www.sika.com - Rapid High Strength Pourable Epoxy Grout - Grouting of bearing plates, machine bases, mechanical bridge joints, bridge bearings and rail base plates- message#12.

www.precisionepoxy.com - Awesome Epoxy Surface Plate! - DIY Instructions.

http://www.machinedesign.com/asp/vie...MDSite&catId=2 - "Machine Design" article on Polymer Castings, pics!

www.epoxysystems.com - Most Confusing Epoxy Site Ever.(flame2)

www.shopmaninc.com - "Low viscosity epoxy like 30 bucks a gallon" - thanks Larry!

http://www.pavepatch.com/flexset-rap...5gal-p-29.html
member The4thseal paving his way to perfect machine frame- message#45

www.reade.com - Specialty Aggregates (filler).

www.kafkagranite.com - Specialty Aggregates, Landscape Products.

http://www.watco.co.uk/asp/autopage....CXDF&Group=REP - "ready-to-use mixed epoxy-concrete?"

http://www.reichhold.com/composites/.../app.cfm?ID=91 - polymer concrete resin.

http://www.mech.utah.edu/~bamberg/re...e%20Design.pdf - "Principles of Rapid Machine Design"- 212page PDF!- Thanks Bob! :cheers:

www.video.google.com/videosearch?q=datron- DATRON Milling Machines on Google Video! - thanks Xerxes!

http://www.books.google.co.uk/books?...ct=result&cd=1 - "Polymers in Concrete"- Papers from international experts from 13 countries...

http://www.epucret.de/index.php?seit..._en&root=26650 - "We are using machines with Polymere-Concrete frames for years. These are the best machines we ever had. Very stable and high accuracy. Epucret is a frame manufacturer for Mikron/Hermle etc..." - thanks Aramon!

http://www.moldmakingtechnology.com/...es/040401.html - The Secrets to Hard Milling Success!

www.corsair82.com/corsair/vacinfs/ - vacuum degassing process...

www.joewoodworker.com - "Woodworkers are fortunate people".

www.masterbond.com/tds/ep30lte.html - MASTER BOND POLYMER SYSTEM.

http://www.aircraftspruce.com/catalo...s/aeropoxy.php - "Aeropoxy From PTM&W Industries".

www.shopmaninc.com -Again... "Low viscosity epoxy like 30 bucks a gallon" - mention Larry when you call them!

www.pyramidgranite.com/index.html - Whoa, this stuff looks cool!

http://www.microplan-group.com/pagin.../celith_gb.htm - "..a little more info on making E/G" - thanks Bruno!

http://www.diamond-drill-bit-and-too...Drill/MAIN.htm - Diamond Drill Bit and Tool.

http://www.harborfreight.com/cpi/cta...emnumber=42947 - Concrete Vibrator... Lightweight and easy to use- plugs directly into any standard 115V outlet!

http://baryon.as.arizona.edu/TECH.php?navi=gload - how to make a "really big telescope mirror"- Incredible!(flame2) (flame2)

**************************************

Many Thanks to All the Contributors!
:cheers:

[brunog]

Walter,
Check the E/C frame on this site:
http://www.ktm-reiseenduro.de/tz/mg2.htm
This is what I call a cool design, all E/C metal inserts, threaded anchors looks solid enough to mill through anything.

Does the Y axis rail look any familiar, it's the one that that was being casted on the photos on post#30 on this thread.
remember this?
http://www.cnczone.com/forums/attachment.php?attachmentid=29393&d=1168718080[/IMG]

This is the only way to go

I wish i could read German, this site has enormous amounts of information:
http://5128.rapidforum.com/topic=110...6&search=beton

Regards

Bruno

[walter]

Nice find Bruno. Here are the pictures:

[lgalla]

Walter thanks fore the review.I was hoping someone would do it.
I semi thought tensioning maybe was a good thing as its good for concrete.Thanks to Geof and others for the input.Granite was stress releived millions of years ago and epoxy is a stable material.No sence in artifically stressing it.
Greybeard,I beleive lava rock is porous.A core sucking in resin is not a good thing.
Relating to the prestressed concrete and voids.I think I read good concrete mixes after vibration tamping contain 6% voids or air entrapment.A thick mix of E/G will have tons of air.The problem is when exotherm hits 150C the air expands making the voids larger.I previously posted espically for one offs,you must accept higher resin ratios,slow cure rates and multiple thin pours to aid in air releace.Torching(flame2) (flame2) will heat and expand the entrapped air forming bubbles releasing to the surface.
I have posted so much I thought I had run out of info.Apparently not as there are many good posts requireng feedback.
Smooth sand is a good thing.Crushed Aggregates are bad as the rough texture will promote air entrappment.Makes sense?Smooth aggregate will help release air.I am still AdamANt of E/G structures enhansing steel frames.Total E/G machines are really for large companys.I am sure some members can prove me wrong,but inserts are beyond my skills.
As stated previously I got "the big job"and had to farmout to a CNC shop.
I have a deadline to make an audio show in Frankford Germany.I hope to post
pictures of "Why I need a CNC router"
Time for a few German beers.:cheers: :cheers:
Larry

[Geof]

...Time for a few German beers.:cheers: :cheers:
Larry

A "real" man asks for dunkel. A litre at a time.

[lgalla]

Geof will you stop the chair thing?(chair) (chair) (chair)
I am a 55year old boy.Could you direct me to manhood?My beers are Holsten Festboc,7%.If you try a couple you will see why Germans have such high technology.These beers open the mind.:cheers:
DUNKEL? Never heard of it.Will check LCBO to-morrow and review the results.I think this is off topic but maybe the moderators will let it pass.
DUNKEL:cheers: VS HOLSTEN:cheers:
Larry
This thread is so involved and long I hope the guys can putup with a little humour however bad.

[lgalla]

Geof
Just reviewed the threads and found thread#35.Obiviously German beer is the key to success.I had previously stated tamping the E/G with a 2"X4" I was wrong,it should be a German beer bottle.I must stress the bottle must be empty as tamping the mix will result in violent de-gassing which will result in ruining a good beer and result in disposal following state or province disposal requirements,Not to mention ruining the E/G.On the other hand,you have two hands.Get it,two tamping utensils will speedup the tamping process resulting in a better product.
Larry

[the4thseal]

As for tamping ...What about vacuum degassing each small layer? The eg could be exposed to vacuum in the mold while the next batch is being prepared?

[Geof]

Larry you have a typo in a post a little distance up. You write: :[I]"Obiviously German beer is the key to success"[\I]

I think you must mean Obliviously. I agree, drink enough 7% beer and you will be successfully oblivious.


P.S. Dunkel is just dark beer.

[RICHARD ZASTROW]

Even us Germans have open?? minds. I just stick with 5% Pilzn beers and quaf, not sip, twice as many of them.

[walter]

Larry, is that blue centerpiece all concrete? I thought we ditched concrete because it was unstable..?

My channel frame would look nice "in concrete"...

[lgalla]

No the blue is E/G I mis speled it as polymer concrete.
Larry

[walter]

Blue center all E/G, topped off with epoxy. Got it!

[JerryFlyGuy]

Another company who apparently does this type of polymer concrete stuff,

http://diamant.ph/en/produkte/dwh/

FWIW
Jerry

[lgalla]

Hay jer another good link for the boys.
They are also Moglice users.
:withstupi I dont't want to appear dumb on the subject but does Moglice replace linear guides in their appalications re Ways?Is this within the reach of us "home"machineers?
Larry

[vger]

Jerry, Larry, All...
Great link! and after browsing a bit found this one:
http://www.moglice.com/newsite/pages...armmframe.html
Check out the caption on the last pic by clicking on it.

Looks very promising for way surfaces on E/G. I did see a referance on the DeVitt site about that.

Guess someone ought to check on pricing on it. Shouldn't take much of it to do way surfaces or leadscrew nuts.

I'm off to balance some 24" rotors
Steve

[JerryFlyGuy]

Moglice claims they can use their stuff to replace 'ways' not linear rails, the difference being that ways are generally hydrodynamic as they work in conjunction with oil. The oil in injected between the ways and the unit traveling on the ways [for the life of my I can't remember then 'name'] and this keeps the upper structure from ever actually 'touching' the ways do to this oil cushion, at least in theory.

In reality the only thing I moglice is good at is emptying a person's wallet. I priced out using it on my machine and the price would have been something like $6k, devcon liquid steel B would have been less than 1/2 of this and the Epoxy I did use was still $500 or so..

If a guy had the buck's it might be ok, but I'd [personally] be looking elsewhere for my needs in the future. I have no doubt its a great product! So great infact that its worth its weight in gold..[or possibly platinum]

vger, for doing nuts is REALLY where it would excel, I could see myself using it for this if I ever had a need. I did get the pricing someplace but can't find it on short notice [its probably at home]. However , if someone is really serious about getting some I do have a contact who sells it and I talked to about it. I won't post it up here as it wouldn't be fair to the man [ I can just imagine the kinda call's he'd get because off the crawlers on the web... he'd have won so many fee satillite dish's that he'd own half the network ]

Best
Jerry

[brunog]

Hey Guys,
You can find more info on E/G at: www.nist.org and search for "nistir 6361" the report is called "Optimization of Polymer Concrete Compositions: Final Report"

[brunog]

Sorry the web site is www.nist.gov

Bruno

[atenman1]

I hope you guys keep working on this! We have been working on epoxy-granite mill bases for a small mill that we are developing (and will be releasing to market soon...we hope!). There are many tricky aspects to it, but the final results are worth it. Through many months of research and testing we have managed to create a small machine with the vibration damping and rigidity of a much larger machine. With knowledge, careful design and planning--a similar machine is within your reach. Don't be discouraged by the unknown.

I hope I can answer any questions about this process. I will try and write up a tutorial on making your own. For now, I will just leave you with some pictures of one of our prototypes that served as a development test bed. Sadly, it has been cannibalized for the benefit of newer prototypes, but it was a great machine and is a good goal for those up for a challenge.


Good Luck!
Matt

Hi Matt

Can you let us see your moulding box for the mill mentioned above? Did you use MDF, or alum for material? Did you use vibration table or something else?
BTW, how about let us take look at your latest model? Sorry for many question!(nuts)
Thanks
Calvin