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 roles.
Quit clever actually, there is no wear-induced inaccuracy this way. it stays good forever and a day. j. On Wed, Feb 29, 2012 at 8:12 AM, Erik Christiansen <[email protected]>wrote: > 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? > > Erik > > -- > The assessment by UN-Habitat said that the world's cities were > responsible for about 70% of [greenhouse gas] emissions, yet only > occupied 2% of the planet's land cover. > - http://www.bbc.co.uk/news/science-environment-12881779 > > > > ------------------------------------------------------------------------------ > Virtualization & Cloud Management Using Capacity Planning > Cloud computing makes use of virtualization - but cloud computing > also focuses on allowing computing to be delivered as a service. > http://www.accelacomm.com/jaw/sfnl/114/51521223/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
