On 28.02.12 12:32, dave wrote:
Check this mill out. Used to make the molds for the America's Cup
boats.
http://www.janicki.com/5-axis-milling.html
That offhand mention of contra-torque backlash elimination is kinda
interesting, but perhaps it's not that different from a loaded ballnut
pair?
I'd say the contra-torque statement says that one of the gears is split
'horizontally' (seen when it lays on the table)
and the main motor drives the one while an auxiliary applies a constant
torque on the other in oposite direction.
And so: no backlash.
For direction change the motors change
