A third option is a REALLY long belt. It is long enough to make a double pass on each side and needs about 8 pulleys but you only need one motor. I saw one of these once but it used a kevlar cable, not a belt
I think the shaft is move simple but but you need precision mechanics to adjust it. It is ever comes apart for service you'd need some good measuring tools to align it. But with two motors the adjustment misdone in software and the mechanic doing the service only needs to get it "close" by eyeball with a tape measure. find adjustment is later in software. My dirt cheap 3D printer uses two motors and parallel screws and I use basically a sheet of paper as a feeler gauge and I can reset alignment in abut 30 seconds to about 0.005 mm. Any design can work as long as you have a designed on squaring method that can be done with simple/cheap tools All the talk about the long axis but I think the REALLY hard part is the Z axis. Lets say you make a cut that is 0.15 mm deep and 3 meters long. Will it remain exactly 0.15mm deep over that long distance? I bet you a buck not. . > In any case I'm still not sure about wheter use two motors or one motor > > with a shaft. The latter option makes me feel more secure because it > can't > > go out of squaress easily, unless you have loose belt or something > breaks. > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
