Great job on your first attempt at Mineral casting for a CNC machine a few tips for those that would like to follow similar steps. The most important and overlooked stop is having your mold extremely Flawless smooth and sealed. Once your mold is prepared and ready for casting I would apply 5 to 8 of mold release polishing between each coat to give me a glassy Flawless extremely smooth surface. I would also highly recommend using PVA and spray it on your mold once you're satisfied with the application of the mold release several coats of Pva goes a long way to releasing your mold quickly and easily. I would then start with a mixture of pure epoxy and spray that into my casting mold several coats may be required for vertical surfaces and hard-to-reach areas let that set up and become tacky. Use a heat gun to release any bubbles on the surface that are visible. I would then proceed to mix up my next batch of epoxy and add a mica powder which will tint the surface creating a solid uniform surface color such that no voids will be visible through your first several layers of clear epoxy. I would let that set up for several hours and mix my next batch epoxy with strictly silica sand and epoxy with some additional Mica powder. Your first few coats should be very hard if not tacky but not completely dry trowel this very fine mixture on to all vertical and horizontal surfaces once this is very tacky or if not hard but not cured then I would proceed as you did in your video with filling up the rest of the mold

@GleenoIT

6 жыл бұрын

Dear Henri, I really appreciate your suggestions. I will try on next project. Thank you.

@772777777777777

6 жыл бұрын

pls remember on complex mold that dont require square.. plum... planer faces edges... to create neg draft angle to prevent mold locking on to your casting... if you have a complex shape that you need to create in your casting ... I would make a neg mold of the detail.... wax the neg plug mold you just made... get some cheap silicone ( the cheap cheap silicone works the best ) mix with acetone or xylene ( note initially the mix will not mix until chemical reaction occurs, than the silicone liquefies) then your silicone becomes brush-able liquid... add acrylic paint pigment to tint the silicon so you can be sure you have even coverage in molds... line it with silicone only 3/16 thick let it set over nite...( note the silicon will shrink if you apply a thick wall ) use plaster of Paris to fill the main core of the plug or fill with hard expandable foam insert anchors as need...when all cures then use the new silicon plug in your mast mold... epoxy will not stick to this waxed silicon barrier plug......bammmmm easy to remove for complex casting details also remember to seal the bottom of the plug ie the sealing face to your master mold and the plug so epoxy will not creep under the mated faces and may be undesirable. This tip will save you time from having to to chisel out mdf or plywood features in your casting... final tip try this method on a small prototype project....

@772777777777777

6 жыл бұрын

if your mold is glass smooth and waxed extremely well ie 10 layer of wax your casting will be the same.... wax each piece UN-assembled..... then seal the seam for assembly... use pva mold release .. spray it on the finished assembled mold, your inside corner will well waxed....this help seal the multi piece mold seams.

@scottwillis5434

5 жыл бұрын

Thanks for the tips! What kind of sprayer would you recommend for epoxy?

@harviecz

5 жыл бұрын

If you need some parts of mold to be extremely flat, you can use thick sheet of glass to make that face of the mold. That's how they make carbon sheets so flat and shiny. By molding them between two sheets of glass.

I am planning on making my own CNC mill out of epoxy granite and aluminum plate. This video was very informative! Thank you for taking the time to make this. Making a project like this is hard enough; filming the process as well is a lot of additional effort.

I love this project. You're doing great!

Nice to see someone else working on projects at 0:52 o'clock in the night :D

This series is awesome. I hope you'll finish the machine soon!

Thank you so much for sharing your experience ! I'm going to do the same thing to conceive a bioplotter

We are waiting your next video. Good job. I’m going to make a cnc mill from epoxy too.

I'd love to see the finished CNC, even if you don't have another build video.

Nice video series! Will you finish the 4th part?

Aaaahhh como on I'm really enjoying this and you just end it like this

really cool! i would love to see how this turned out!

Really want to see that machine finished please do an update soon great video thanks for sharing

Hey, this is awesome. Will there be a part 4? I really want to see the finished product.

@andreascosta5781

4 жыл бұрын

yeah

@Milkex

3 жыл бұрын

but actually no

@JesseSchoch

3 жыл бұрын

@@Milkex still no

@MrChangCJ

3 жыл бұрын

i suppose he failed :(

@pmsilvei

2 жыл бұрын

🙄

Great job

Nice. Guessing you must have finished it by now; how's it running? Would like to see part 4!! :)

the wood stuck to your casting because the granitan mix should be just moving up and down compacting but with would you cant control it and it rubs through the release agent whatever you use household wax or mould release we would get around it by cladding the wood with steel sheet or paint a gel coat on the wood first your vibrating table is great loved it

Still waiting on that fourth video! At least let us know how it turned out, the suspense is killing me! Haha

Hey @GleenoIT , How is your CNC going now ? did you finish it ? Where is the video part 4 ? :) Aniway, is it possible you publish your CAD Files or maybe just the component list ? For cutting what material this CNC is designed for / capable of cutting ? Your casting turned really good. Thanks

Hi, excellent progress. Did you use any mould release or wax on your mould? Thanks!

@GleenoIT

6 жыл бұрын

Yes, first I have used a wood filler and after a wax release agent (3-4 hands). You can see on my first video about this project: kzread.info/dash/bejne/rH93k9dvmdnWcqQ.htmlm57s Thank you.

have you made any progress on the project? i’m very interested how it turned out!

Thanks, Man, I've been waiting for this video!

May be you need a higher vibration frequency. As 3000 or 3600 RPM motor or 50-60 Hz is not high enough. As if you vibrate cement the frequency is much higher to work very effectively. From poor memory it is around 1000Hz.

Nice video

Great videos, looking forward to part 4! I would love to have a copy of the CAD files, if you decide to make them available or sell plans. Wondering what kind of wood-cutting CNC machine you have for making the molds, and what you would recommend? I would appreciate the benefit of your experience. At this point, if you were going to do it all again, would you use particleboard / MDF, a high quality plywood, or a combination of the two for the molds? What else would you do differently, based on what you have learned?

@BOK1SH

5 жыл бұрын

Hi Scott, If You want to cast epoxy granite, it's not really important what material is used (MDF,plywood,wood). Good release agent and surface finish is really crucial thing to good result... So I recommend make mold from MDF/plywood/wood or combination of them and then sand it smooth, paint it with some primer to fill pores and unite surface. Last step should be several layers of wax release agent + PVA...

Great videos. Where is the video 4/4 ?

Vibration is good for compacting and degasing but the result is a stratification of the mix with the heavier aggregate on the bottom and pure resin on the top. Not good if you are looking on mechanical performance. Uhpc is better for diy because is self compacting and degasing without vibration. IMHO

So, what mold release didn't you use,, ( ALL OF THEM)

May I ask? I’m looking for ideas on my project. Why design fixed gantry not column type?

@hampopper3150

Жыл бұрын

cutting travel.

Good morning! Types of resingyou used? It isappropriate to use 3 sizes of quartz to replace gravel and sand? Thanks! Marcelo Siqueira. Brasil

nice idea and design .but no part 4 after 1 year !

Still no part 4 so many years later :( Hope the the guy is okay.

What's happened with this project? I'm looking for a compact but capable CNC milling solution and this looks like it has potential.

Did you do a part 4?

Where did you get the design 3d file? I mead did you design from scratch or is there a download which you used? Thanks

@GleenoIT

6 жыл бұрын

I have designed this little machine from scratch! ;)

Did you finish the project?

9months since the video. Any progress now?

Why does the vibration work? Is it shear-thinning or some other mechanism?

@luke1811

6 жыл бұрын

It forces air out the mixture of epoxy granite.

@difflocktwo

6 жыл бұрын

Yes but how? What is stopping the the air from moving and why does it move when you shake it? I am wondering if it like ketchup where you shake it, it gets thinner (shear-thinning fluid) or if its like a bag of nuts where you shake it and you get a convection current that carries the air bubbles out. Granular convection wiki: [where granular material subjected to shaking or vibration will exhibit circulation patterns similar to types of fluid convection.]

@GleenoIT

6 жыл бұрын

Vibrations are helpful to push up bubbles trapped during mix process and when gravels are added at rest of mixture. When vibrations shake the mix, the heavier elements go down and push up the air.

@scottwillis5434

5 жыл бұрын

I suspect that the vibration helps by: 1. Helping overcome surface tension. 2. Shifting the filler to help it settle, displacing air. 3. Rotating and shifting the filler so that air trapped underneath a cupped or horizontal surface is now under a more tilted surface. 4. Opening paths for bubbles by shifting the filler.

Part 4 PLEASEEEEEE 😅

Still working on this project? Super interested

What happened to part 4??

Gutty of you to leave us.. The you owe the internet big time!

@mystamo

2 жыл бұрын

@@____________________ok It was sarcastic humor.. Getting out from under your rock.. Ever (thought) of that option?

@mystamo

2 жыл бұрын

A counter with a joke makes you cool again. At the end of the day. We are both trying to make a dyi CNC machine.

Dude where is part 4?

@GleenoIT

6 жыл бұрын

Some and parts are ready, I'm working on Z axis now. I have some design problems with motor and spindle, but I hope to resolve quickly. Thank you for your interest!

@mannycalavera121

6 жыл бұрын

Thanks for the feedback, this thing is awesome

@scottwillis5434

5 жыл бұрын

@@GleenoIT Feel free to do parts 3.1, 3.2, ...

damn this is one hell of a cliffhanger

Where are you??

Very cool video! Good job on the vibratory table,. Ditch the music or at least turn it down.

Hello my friend :) sılımıx 262 what ???

Your stated proportions are: 12% epoxy, 10% gravel, 20% sand and 70% silimix ....in total that is 112%

Is this design public anywhere

грамотный станок получиться.скажи -silimix 262 .что это? размер.

@GleenoIT

6 жыл бұрын

Silimix 262 is a quartz mixture. www.euroquarz.com/products/toll-manufacturing/silimix-quartz-mixtures/

@user-qx9mg6mv3d

6 жыл бұрын

спасибо

Ciao, per caso ne fai su commissione?

Why you don't use polyester granite? It would be cheaper.

@GleenoIT

6 жыл бұрын

Because polyester resin have different mechanical proprieties, less strong then Epoxy resin. But thank you for suggestion ;)

@harviecz

6 жыл бұрын

i know, but had anyone tried ever? it looks like it might not really be problem in such big block...

@scottwillis5434

5 жыл бұрын

@@harviecz it may work OK, however will the strength be as high and will the resulting casting be as rigid? Both strength and rigidity are very important in a machine tool. Consider what it costs in time and money if a casting cracks. Consider what happens when tightening a bolt, a workpiece clamp, or each time a cutting tool hits the workpiece surface if the machine is more flexible. Accuracy will suffer.

@harviecz

5 жыл бұрын

You have like 100+ mm layer of resin granite over there. Usualy these resins are used in thin layers (few mm) with carbon or glass. Chances are that in such thick layer the difference between epoxy and polyester will be minimal. It might also be fun to look for some gravel alternative which wouldn't be so heavy. Guess that expanded perlite would be too soft LOL.

@BOK1SH

5 жыл бұрын

@@harviecz Resin is there only to stick gravel together in amount as low as possible (usually 8-12%). Because we need mechanical properties of that filler (gravel) not epoxy/polyester which is plastic. So I think it is possible to use polyester without any problems (in this small machine) but epoxy have better specs and price difference isn't so huge...

to bad there never was an episode 4...

Cool project, too bad it lacks a conclusion

The fucking Background noise....kill me

soundtrack - beep bap squeak - too annoying!

The kind of mask you are wearing only protects aginst dust. It has absolutely no effect on solvents or the fumes from the epoxy.

@Vir9il

5 жыл бұрын

If it's a high quality epoxy without solvents or additives, then it has basically no toxic fumes.

@Vir9il

5 жыл бұрын

For example, here is the safety data sheet for Epoxamite 103 by Smooth-On: www.smooth-on.com/msds/files/EpoxAmite_103_Comp.pdf It says "Respiratory protection is not normally required when using this product with adequate local exhaust ventilation." It's more important to prevent the uncured epoxy from contacting your skin, eyes, or mucous membranes because it is a contact allergen.

Musak is dreadful