It has been mentioned in this thread already, but I think it can be clarified.
Outrunners when they appeared were a blessing for the R/C plane builder, since a propeller wants to run at speeds below 10 000 RPM for best efficency and earlier motors did maybe 20-30 000 RPM so they had to be geared. The new outrunners had the torque already at lower RPM so no downgearing was needed anymore. For PCB milling on the other hand with carbide bits of 0.3 mm dia or so you cannot get to much RPM really, 50-100 000 RPM is desirable to get a decent cutting speed. This is not what outrunners are optimised for. You would be better off with a long narrow inrunner of the same power as the short fat outrunner. // Lars ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
