Re: Milli a new composite mill kit
Originally Posted by
peteeng
Morning All - Have completed a whole new series of designs called the Mini. The Crux was that every time I changed the geometry I seemed to go backward with the X stiffness. I decided to scale down the machine till the base got to 100kg, a 2 person lift or I can block and tackle from the roof. This means a table size of 250x500mm. Then the X dropped to 14N/um which drives me mad. Plus the Y&Z get better at 50N/um... Then it struck me the columns are not wide enough! The penny dropped so the Mini then got "wings" I just copied and flipped the columns around and booleaned them together adjusted the base and now I get X 28 Y29 and Z69 N/um... very good. So make the columns square and keep adjusting until they work.... The current wing design is a bit complex to make. Plus smooth out the base and maybe make a bit thinner. Holy Grail Batman!! Peter
Peter, I had arrived at essentially they same column shape.
Seems very stiff. Not super easy to cast but not the hardest design either.
7xCNC.com - CNC info for the minilathe (7x10, 7x12, 7x14, 7x16)