A new hope: Epoxy granite and steel.

[jarjar]

Hi,
That sounds like a heavy build!
But you are missing some crucial informations: what would be the working area and what do you plan to make with it??

- There are also holes on the side of the carriages, is that so that I can move the lubrication port from the front to the sides?

Yes but you have to pierce a hole with a needle and tap the thread.

I'm thinking of a BT30 and a size 130 servo(180 might be too heavy for a moving gantry), something at the range 12-24Nm and able to get to 9000RPM. I got a google problem with this though, I'm not getting any matches for "spindle servo" or even "spindle cartridge", the results almost always show up regular router spindles.

Check out CTB servo in China. They make nice spindle servos, but they are quite bulky.

Alignment:
- aligning ballscrew with the rails, I know how to do rail-to-rail alignment, but how do I do it for the ballscrew ?, the old fashioned way of moving the carriage and then tightening the ballscrew mount? Is there a more foolproof way of doing it? How do I make sure there are no forces acting perpendicularily on the ballscrew?

https://www.youtube.com/watch?v=mLCHT2ywk5A