Re: Rigidity about cnc machine
Diepchess,
If your talking the el cheapo spindles on Ebay, good luck with that!
At 1.5kg weight for the spindle however, I'm not sure what you think you'd find as even a weak little 800w spindle weighs around 2-3kg. Unless you mean a die grinder?
In short, machining steel requires brute force, and a LOT of mass and rigidity. Without the horsepower to cut, and the mass and rigidity to dampen the vibrations and keep the cutter on target, you'll find the cutter will be shrieking like a screaming banshee, and will be skating all over the material. You'll also destroy cutters very, very fast this way.
For practical hobbyist purposes in most user designs, rigidity, and mass to a degree, is generally inversely proportional to cutting area. The bigger you make the work area, trade-offs are usually made to lighten the gantry and X axis in order to still be able to move it adequately.
A bigger machine could be made to cut aluminium to varying degrees of success depending on mass, rigidity, size, and quality of machine components, but to machine steel is a very different ball game.
cheers, Ian
It's rumoured that everytime someone buys a TB6560 based board, an engineer cries!