Hi,
I have been thinking about doing just that for the past two years
I mean, I have been hunting eBay for the parts.
Currently I have
- two THK HSR45 large 1m linear ways for the z
- one 25mm diameter 980mm C3 ground NSK ballscrew
- two 400mm Hi-Win linear ways for the X
- one 10mm 350mm C5 ground STAR ballscrew for the X
- 1.5kW Optimum speed controlled DC motor with controller
- one spindle: it was built by a guy in Germany who was making his own CNC lathe too but had to stop due to personal issues. It features 6 bearings, is over 300mm long and accepts a 100mm chuck. I measured more or less 1/100mm circular error...
Currently hunting down eBay for two 1200mm long THK HSR25 linear ways as the HSR45 are HUGHE. They have to be bolted down with M14 screws and I think they'll be too high for the lathe.
I was thinking to bolt everything down on a 2" thick aluminum plate that's been trued on a large shaper, mounting the Z on two aluminum extrusion (probably rexroth 90x90mm profiles as I can get them at the same factory where they shape the large plate). Milling the top mounting surfaces flat and then bolt everything together
The headstock is already in a 80x80 extrusion so I'll put it on top of another extrusion or casting to get it to height.
Also I plan to fill the extrusion with concrete when done, but the plate and extrusions alone will be very heavy...
No finished plans yet as I wait to have all vital parts here (waiting for the Z linear ways).
My only problem right now is for a good tailstock design and how to mount it to the rest.
Would be great to exchange ideas! I should get the final parts (rails) for Easter.
Best
Pierre