On 02/22/2018 11:56 AM, andy pugh wrote:
On 22 February 2018 at 18:27, Chris Albertson <albertson.ch...@gmail.com> wrote:

That is what I'm making too.  A rotating ball nut.   I looked at all the
ways there are to lift the head of a Siege X2 mini mill and I think the
question comes down to the location of the screw.  I think I will use the
space occupied by the factory installed column mounted rack.
I put the screw inside the column:
With a shim strip in a tunnel to cover the slot:
It looked quite neat but was a terrible idea. Cutting the slot in the
middle of the dovetail massively reduced the torsional rigidity of the
So don't do that :-)

I have a machine that is identical to an X2. I found a tiny little ballscrew on eBay and mounted it to the front of the column. I had to mill out a little relief in the slider that runs on the column.

I don't have a really clear photo of the ballscrew retrofit, but the top and bottom photos here do show part of it.


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