2016-08-03 15:07 GMT-03:00 Gene Heskett <[email protected]>: > Servo's, generally speaking, will use only the power it takes to > accomplish the job. Ball screws, for horizontally moveing loads, will > use 1/4 or less of the power it would take to do the same job with good > acme bolts & bronze nuts, and because of the relatively coarse tpi, will > move it farther and faster. >
Well, here we're using a delrin nut with 8 mm lead and it's working in servo mode better than what I expected for a vertical load. https://www.youtube.com/watch?v=JX1r7xQHvrI The charriot alone is at least 40 kg, and the transformer that's mounted on weights 60 kg if I remember well. I'm moving it at almost 10 m/s with a 5 HP AC motor, no permament magnets. I guess if this machine could be fitted with a heavy ballscrew this would a lot easier. Anyway, there's the problem of covering the ballscrew to avoid the water for cooling the part to reach it. -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
