CNC MILLING MACHINE - PART 6 - Filling with epoxy granit & more

[@adrienb6497]

Quel projet ! Je me fais une PrintNC un peu améliorée mais là on boxe pas dans la même catégorie, Bravo !

[@Matt-jz7to]

This is one of the best DIY VMC builds i have seen on KZbin. Great work, keep it up

[@ThomasLe_G]

thank you a lot, there still is some little weakness, for my next gantry mill project i will make some wedge and rail guide clamp for regidity and adjustments and improve the efficacity of the process of making the base ...

[@boessi]

Very nice machine. I was also faced with the question of UHPC or mineral casting. After a few material tests, it was clear that epoxy was the better choice for my small mineral casting machine. For large machines, I would rather use UHPC for cost reasons. For UHPC, you need a good mixer, e.g. a feeding machine. Epoxy is easier to mix. Making the optimum epoxy mix yourself is not easy and requires trial pours. If anyone is interested, they can take a look at my video “DIY CNC milling machine made of mineral casting and ALU - Part 2”.

[@ThomasLe_G]

Thank you , you too I already saw few times your machines videos , they are really good ! And yeah what u said is exactly I think about UHPC concrete and Epoxy . I planned to do a small gantry cnc with epoxy casting only using my current CNC … Thanks for your comment

[@DgtalBreakz]

That thing is looking beautiful, almost done :))

[@ThomasLe_G]

thank you, it s true we are close to the first movements

[@fieur]

Wow cant wait for the next part! well done

[@ThomasLe_G]

haha, thank's mate , yeah it'll be soon

[@AntoineGst]

Bon courage pour les prochaines étapes !

[@ThomasLe_G]

@@AntoineGst merci pour ton message, oui ça va allez vite

[@yannismarle7797]

That is some nice work here. Huge project, must be overwhelming sometimes ! A little tip i saw around 8:00 with your late, you still have a little bulge on the center of your part after your faced your parts. your cutter insert tip is slightly under your lathe rotation axis, if you have a cutter height adjustment knob you can adjust it like this, and if you don't you can put a little shim half the width of the bulge left on the part under your cutter to bring it true to the axis of rotation

[@SylvainLeGall-q4c]

Amazing 😮😊❤

[@ThomasLe_G]

tu as un compte Google et tout, je suis espenté

[@jovanbabic489]

Just a quick question. Why are u using epoxy sand/granite, why not using concrete? It is cheaper. Is epoxy having any better characteristics?

[@ThomasLe_G]

@@jovanbabic489 Nice question, yeah I thought a lot about , using UHPC concrete instead of epoxy granit but I would have had to arme the concrete who is not possible… and if not with all the vibration I’m not sure that the concrete would crack or something like that

[@DgtalBreakz]

@@ThomasLe_G Im gonna use concrete cuz 15% weight in epoxy for a several hundred kilos machine is expensive 🫰🫰🫰🫰 and I have the same worries, so I welded some rebar strategically so the concrete can grab onto it. If a building doesn't collapse with all the load and seismic stuff happening, I dont think concrete inside a steel tube that only helps minimize vibrations will either. Edit: also, UHPC, I dont know if its always the case, includes glass fiber strands in the mix and some additives to prevent contractions after it starts curing, so risk of crack propagation is reduced a lot. I saw a few machines with fully exposed UHPC where the precision surfaces are inserts in the mold.

[@Matt-jz7to]

Epoxy is more durable than concreate for this application and it's better at absorbing vibration

[@car9167]

@@Matt-jz7to But is concrete sticking to the steel walls better than epoxy? What about the humidity in concrete, wouldn't that rust the wall interiors and delaminate from the walls and cause vibration? I think epoxy is better for this application (inside steel tubing). I was planning to to exactly the same

[@ThantiK]

Granite.