On Thursday 10 September 2020 18:32:41 Eric Keller wrote: > Gene, do you have pictures of your sheldon? > Yes, I've posted some to the list so they s/b in the archive. Yell if you can't find them.
There has been a couple changes since, the rpi3 is now an rpi4, and a honking big z-motor that was a 1600oz/in nema 34, is now a 3NM nema 23, one of the new 3 phase stepper servo's. It has an error output, which if triggered, e-stops the whole thing and unhomes it. And just today I got 2 more of those motor/driver combo's but in the shorter 2NM size which can fit on the back of the apron plate so I can put one of them on the X drive. But not instantly as I need to either ream that motor pulley out to 8mm or order one, as that one is 1/4". And I'm up to my grin trying to get someone interested in replaceing a 30 yo window that fell from broken plastic parts about 2AM 10 days back. And I'm getting too darned old to handle that project alone. > On Thu, Sep 10, 2020 at 5:30 PM Gene Heskett <ghesk...@shentel.net> wrote: > > On Thursday 10 September 2020 13:53:53 Scott Harwell via Emc-users wrote: > > > I'm testing on the HP8300 $115 with keyboard and mouse from > > > Newegg. It looks good but I have two problems (probably me). No > > > root password and power management time out. > > > > > > Scott > > > > > > > > > On Thursday, September 10, 2020, 11:02:19 AM CDT, Sam Sokolik > > > <samco...@gmail.com> wrote: > > > > > > I just downloaded the buster 2.8 iso and tested it on an 8200 > > > (8300 usually runs just slightly better in my experience) > > > > > > This was overnight with glxgears running. But I didn't see a performance report. > > > On Tue, Sep 8, 2020 at 11:45 PM Bruce Layne > > > <linux...@thinkingdevices.com> > > > > > > wrote: > > > > On 9/8/20 12:48 PM, Dave Matthews wrote: > > > > > A few weeks ago someone mentioned the HP 8300 SFF as having > > > > > very good jitter numbers. Those are an i5 that takes a $5 > > > > > cable to add the parallel port. Usually about $150 US on > > > > > Amazon. > > > > > > > > > > $155 today - > > > > > > > > https://www.amazon.com/HP-8300-Elite-Computer-Quad-Core/dp/B01CV > > > >9G1B > > > > O/ref=sr_1_1?dchild=1&keywords=hp+8300+sff&qid=1599583671&sr=8-1 > > > > > > > > That's the Amazon price with Win10. It's $81 on eBay, maybe > > > > less for one without Windows. Search for item number > > > > 184439631747, or more generically, search for "HP 8300 i5 > > > > -usdt". > > > > > > > > I can't vouch for how well it runs LinuxCNC, but the i7 version > > > > (eBay, off lease) has been my Linux desktop PC for the past few > > > > years and it's on 24/7. It's been 100% reliable and with a > > > > solid state drive and Linux, it runs like a scalded dog. I run > > > > FreeCAD and it'll spin a complex model, generating shaded images > > > > at more than twice the frame rate needed for smooth persistence > > > > of vision video. There's definitely something to be said for a > > > > reliable PC to use for LinuxCNC in the shop. > > > > > > > > In hind sight, I probably should have gotten good used PCs that > > > > run LinuxCNC instead of buying a bunch of Intel motherboards so > > > > I could have standard controllers for all of my LinuxCNC > > > > projects. However, I was very stoked to see that LinuxCNC 2.8.0 > > > > can be installed on a Raspberry Pi 4. That's very cool, and > > > > would be ideal for tiny machines like a little desktop CNC > > > > router or a Sherline mini lathe. > > > > Why limit it to toy's? I am running a 75 yo 11x56 Sheldon lathe with > > an rpi4, make it do things it never dreamed of doing originally with > > a compound and taper attachment, but without either, and much faster > > than original after the gcode is written. No between cuts pauses to > > check your next cut. :) > > > > 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> > > 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
