By the way, the manual was too big for the list. Sorry for that! El sáb., 12 sept. 2020 a las 1:55, Leonardo Marsaglia (< ldmarsag...@gmail.com>) escribió:
> That link is to the true servo line they make, and which I have no >> experience with. What I do have experience with is their line of 3 >> phase steppers that think they are servo's. They are servo's internally >> but take the usual step/dir signals. 1000 ppr encoders on the motors. > > > Hello Gene, > > I've seen those hybrid stepper motors are a pretty popular option now. I > frankly don't trust regular steppers at least for the machines I'm used to > retrofit. Are they a lot cheaper than a servo motor? Because looking at how > servo motor prices falled down I think today is more than convenient to > install servo motors without thinking it. At least for the 2NM and above > range IMO. > > El vie., 11 sept. 2020 a las 18:46, Gene Heskett (<ghesk...@shentel.net>) > escribió: > >> On Friday 11 September 2020 16:26:07 hubert wrote: >> >> > On 9/11/20 2:21 PM, Leonardo Marsaglia wrote: >> > > Helo to all, >> > > >> > > I found these on Aliexpress: >> > > >> > > https://www.aliexpress.com/item/1005001376368510.html?spm=2114.12010 >> > >612.8148356.2.5d5325f21j0XN8 >> > >> That link is to the true servo line they make, and which I have no >> experience with. What I do have experience with is their line of 3 >> phase steppers that think they are servo's. They are servo's internally >> but take the usual step/dir signals. 1000 ppr encoders on the motors. >> >> I just a month ago, got tired of vibrating tools off onto the concrete >> floor, and replaced the src of that vibration, a 1600oz/in nema 34 motor >> driving the Z on my Sheldon lathe conversion, used because I had it at >> the time, with the 3NM version of their stepper/servo. I doubled the >> movement speed, and silenced the vibration. Plenty of torque to drive >> it under cutting loads, but when I was done, I positioned a chuck jaw >> where it would hit it, and drove it toward the chuck and let it hit it >> at about 2" a minute. About 5 milliseconds after the chip hit the chuck >> jaw, it tripped, powering down the motors and unhomed the machine. >> >> Powering down the motors made it spring back from contact by around 5 >> thou, and it did it without visible damage to the stationary chuck, or >> to the carbide chip in the tool. So that looked like a better thing and >> I ordered, and rx'd yesterday, 2 of the 2NM versions of that motor, >> which is short enough to fit the X motor position. Now I have to figure >> out how to get those plugs past the carriage to-from the front apron. >> And probably splice both cables, its a long ways from the front apron to >> where the driver will live on the post in back of the spindle. >> >> > These look like the ones I use on my Skyfire Mill. The only problem >> > I've had is over driving my x axis into the side of steel case and >> > breaking it off the table. Not the motors fault the other two are >> > still working 3 years later. I replaced with the original. >> > >> > > What do you think? The price is more than good. The seller has good >> > > feedback on all the listings but sadly, no enough sales to be sure. >> > > >> > > I'm tempted to buy these to drive the router but I don't really know >> > > if they will be reliable enough. >> > > >> > > Thanks as always. >> > > >> > > Leonardo >> > > >> > > _______________________________________________ >> > > Emc-users mailing list >> > > Emc-users@lists.sourceforge.net >> > > https://lists.sourceforge.net/lists/listinfo/emc-users >> > >> > _______________________________________________ >> > Emc-users mailing list >> > Emc-users@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/emc-users >> >> >> Cheers, Gene Heskett >> -- >> "There are four boxes to be used in defense of liberty: >> soap, ballot, jury, and ammo. Please use in that order." >> -Ed Howdershelt (Author) >> If we desire respect for the law, we must first make the law respectable. >> - Louis D. Brandeis >> Genes Web page <http://geneslinuxbox.net:6309/gene> >> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
