> -----Original Message----- > From: Ed [mailto:[email protected]] > Sent: February-17-20 5:18 PM > To: [email protected] > Subject: Re: [Emc-users] RPI4 is pretty close to a decent machine control > > On 2/17/20 6:20 PM, John Dammeyer wrote: > >> From: Sam Sokolik [mailto:[email protected]] > >> Because your examples are not running a full operating system... > > I don't buy that. That's like saying. Look. The ride is a tad > > uncomfortable > but that's to be expected. After all this is a 10 Ton gravel truck. But > look at > what it can carry. True it's only groceries today and most days but that one > time it will come in so handy... dear... > > > > John > > > I'll buy that because it is true. Linuxcnc carries the baggage of being > a motion controller with attached OS. If you like using a go between > board that uses a $2 chip that sings and dances go gettum. Check and see > the availability of that chip in a couple years. > > Many CNC users don't measure machine life in weeks or months or years > but DECADES. My first LCNC machine is still going strong after almost 20 > years, step and direction to Gecko 320's. Where will the Pi be in 20 > years or your $2 chip? > > Not to knock using a Pi or whatever but to point to the fact that a PC > running LCNC is the point to measure from and will remain so. > > The $2 chip solution may a great thing esp in a headless setup as a > facilitator but I would buy backups. > > > Ed. > > 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 All this stuff being built nowadays has a life of 1 to 3 years before it's out of date.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. 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. > > > _______________________________________________ > 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
