Its been a while but I’ve been updating my design and have made a number of changes to include many of the improvements suggested in this thread. But I have also been persuaded to widen the table to 1250mm (4’) so I can machine a half sheet (seemed a good idea at the time).

So I have now put together a preliminary BoM for the machine along with weights and I am very concerned that it has evolved into a monster. Lol.

Excluding ball screws and misc nuts and bolts, but including spindle these are the approx weights:

X Axis 21Kg
Gantry 76Kg
Base & Table 149Kg

So my next issue is to work out how to drive these masses, What would be the best combination of driver, motor and ball screws. Would the 60BYGH401-03 4Nm steppers work and are 16mm screws to flimsy?

Jim