> > 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
