there are still printer port options available if that is what you want.. I have played with 3rd gen i5's (HP 8300 sff)
this is with rt_preempt... I still wouldn't expect much more than 40khz stepping.. (in my experience) http://www.electronicsam.com/images/KandT/testing/8300/Screenshot_2019-08-11_05-02-25.png and another video... https://www.youtube.com/watch?v=OMreIgsMnW8 On Mon, Feb 17, 2020 at 8:38 PM Ed <[email protected]> wrote: > On 2/17/20 7:51 PM, John Dammeyer wrote: > > > SNIP > > > Truthfully, all the Intel type NUC PCs don't have parallel ports and > unless you buy two 7i92H or whatever MESA board you buy there is no > guarantee that they will be there in 20 years either. > > > > > https://www.intel.ca/content/www/ca/en/products/boards-kits/nuc/boards.html > > > > But if that RPi4 costs $50 and your 7i92H costs you $89. Then buy 4 of > the RPi4. That's the price of one Intel NUC PC compatible and now you have > 3 spares. > > > > But I agree. All this stuff being built nowadays has a life of 1 to 3 > years before it's out of date. As long as I don't update my iPhone 4S it > will work. I'm still on the original battery and get about two days out of > it. But if I update the OS then Apple will make sure that my 4S is > useless. And already the industry has done some of that by updating HTML > pages in such a way to provide that "improved user experience" which is > code for more advertising and tracking but it breaks the browser on the > iPhone 4S. So that I can't do very well anymore. > > > > And of course new apps aren't backwards compatible so eventually I'll > have to buy a new phone. > > Ah but LCNC IS backward compatible, forget the base hardware, the > software still runs! > > > > > It's probably the biggest reason I'm considering LinuxCNC instead of > MACH3/4. The lack of drivers for the newer hardware with the older OS is > the clue. But the latency of LinuxCNC on the parallel port means an > upgrade to some sort of Ethernet device. And your 20 year old PC will face > that same issue likely if it fails. Not a bad thing. Just nothing 20 > years old can be replaced with something identical. > > > If you want to keep using software stepping that is fine, my old machine > runs great with no latency problems. I recently finished a retro on an > identical machine but this one has full servo 4 axis with spindle > encoder that will run just as fast as the motors will go and spindle > will turn with rigid tapping. It set me back a little over $1K but is > well worth it for me. Now you do not want to spend $1K on your machine > but a board from Pico or Mesa will get you into high speed steppers for > not as much and no worries about latency, your choice. > > Think of LCNC as a constantly updated OS and drivers unlike Mach3/4 > Windows, just add a little hardware and let it rip! > > > Ed. > > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
