Sturdy and Fast all Steel CNC , my first build

[Boyan Silyavski]

Excuse me Boyan. I have doubt about this subject.
i see the hardness of some stone and metal in https://www.tf.uni-kiel.de/matwis/am...ed/t8_4_2.html
for example the hardness of Al is 25 Vickers hardness and the hardness of granite is 850 Vickers hardness. now we see that the hardness of some stone much more than Al and Fe.
now if we milling and engraving stone, then the force in chassis is much more rather than milling Al. what's your opinion about this subject?
thank's

Dont get stuck too much into literature. real life is different.

Real world examples:

On this video you will see this machine https://www.cnc-step.de/fraesmaschinen/ engraving stone. And my machine is on another different level of speed, strength and precision from the machine that is demonstrating this.

Another video plus more info on bits . Again as you see the machine is not something special.


I already bought 3 diamond bits yesterday, from the expensive ones, PCD 70 degree with 0.4 point or something. So very soon will be able to demonstrate you.


About the hardness. The diamond is actually chipping the material, cutting it. Its not like pushing it. And you know diamond is much harder than granite.

Even on a flimsy machine you can engrave using spring loaded tool like this .

But to hard engrave and V cut granite obviously your machine design has to be rigid of course. My machine was designed to accept an oscillating air hammer head, a little stone cutting will not be a problem.