On 2/21/2015 6:44 AM, Viesturs Lācis wrote: > 2015-02-21 15:16 GMT+02:00 Tobias Gogolin <usert...@gmail.com>: >> I am suggesting small geared brushless motors > > Gearing will introduce backlash. Linear delta machine may have > end-effector vs actuator travel ratio up to 2:1, depending on rod > length vs delta radius proportion, so any backlash in actuator means > even larger backlash on end-effector. Take all 3 actuators, add > together their backlash and you might have difficulties to achieve > desired positioning accuracy for hotend. > I would be tempted to go the traditional way of mounting belt pulley > right on motor shaft - tuning feedback loop might be challenging, but > once that is done, the machine can be very very fast...
Look for ABB Flexpicker on YouTube. It's a delta design with actuator arms directly connected to servo shafts. Quite fast and precise, with the right type of tool it can pick up and stack delicate items such as pancakes at extreme speeds. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=190641631&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
