Originally Posted by
hanermo
I suspect You are a bit over Your head ...
Have You ever built a machine for industrial or workshop use ?
The last thing You need to worry about at this point in time, is the controller.
Can You make the machine mechanically ?
A 60x60 cm 5 axis machine == HAAS UMC at 100k$, more or less.
Can you make a machine of this size, using similar sized or more robust components,
of same or heavier weight ?
Can You make it in a reasonable time-frame ?
and how do You know this.
It is pretty hard to make a VMC, 3-axis.
Making a 5-axis machine is harder. A lot harder.
The problem is rigidity, and avoiding chatter.
Both are easily solved by using much heavier components, of much greater accuracy ...
but this leads to Very High Costs.
All above is only relevant in the context of *company*, and work use, leading me to see this as a profit-making venture.
Thus, You will need to use real spindles (ISO30 or up in size) with drawbars and toolchangers,
real spindle motors (ac servos, or perhaps VFD/3-phase).
Sorry I did not answer about the Sinumerik stuff, as such.