#linuxcnc Logs

Aug 08 2022

#linuxcnc Calendar

04:56 PM * roycroft is not a fan of broken servers
05:41 PM CaptHindsight[m]: roycroft: it's not an issue for industrial systems that are >$10k
05:41 PM CaptHindsight[m]: and hobby is whatever you can find for your budget
05:46 PM CaptHindsight[m]: there is a market for mini-itx systems for <$200 with a few GB's of RAM and 120GB of SSD, with everything included, the enclosure, power supply etc
07:01 PM roycroft: i would suggest that it may be an issue for industrial systems, if they are designed and marketed as compact machines
07:01 PM roycroft: my reason for using an rpi is not cost, but real estate
07:02 PM XXCoder: JT-Shop: hmm well I usually turn it off, since I assume firmware would evenually leak memory and corrupt parts stuff
07:02 PM XXCoder: prusa machines dont do that, but then they pay quite a lot ion developing firmware
07:02 PM XXCoder: even with prusa I turn off machine when not in use
07:06 PM roycroft: i don't usually turn my printer off when it's not in use
07:06 PM roycroft: but these days it's rarely not in use
07:06 PM roycroft: whoah
07:07 PM XXCoder: some machines would evenually develop issue if on for a while. yours seems not but jt I think it does
07:07 PM roycroft: the fbi just executed a search warrant at mar-a-lago
07:07 PM XXCoder: my old mp mini select v2 certainly did. I always rebooted it each print even
07:07 PM roycroft: they're looking for presidential documents
07:07 PM XXCoder: whoo hope they find a lot
07:07 PM XXCoder: probably find some in sewers too
07:07 PM roycroft: we're in totally new territory here
07:08 PM XXCoder: https://www.cnn.com/2022/08/08/politics/trump-white-house-notes-toilet-photos-cnntv/index.html
07:08 PM roycroft: yeah, i've seen that
07:09 PM roycroft: the former president said "they even broke into my safe"
07:09 PM XXCoder: apparently
07:10 PM roycroft: like, when have the fbi ever done a search and said "oh, there's a locked safe - i guess we had better not mess with that"
07:10 PM roycroft: anyway, enough of that
07:10 PM XXCoder: if that was true everyone would keep everything in safes
07:10 PM roycroft: i could not help reacting a bit - that's rather stunning news
07:10 PM XXCoder: indeed
07:10 PM roycroft: but it's rather off topic
07:11 PM roycroft: i'm going to stick to my suggestion that small single board computers may be appropriate for industrial applications
07:11 PM roycroft: and even desired, depending on the application
07:12 PM roycroft: i'm not suggesting that a rpi is the appropriate single board computer
07:12 PM XXCoder: it seem to be excellent setup for homebrew cnc machines, no idea on commerical. I only ran big machines
07:12 PM roycroft: which is why i was asking about alternatives earlier
07:49 PM unterhaus_: it would be convenient to use an rpi on my milling machine, but I can't talk myself into it
07:50 PM unterhaus_: we had a bridgeport that would boot up and you could see that the mobo was just a stock 486 with phoenix bios
07:50 PM unterhaus_: rpi4 probably more computer than that 486
07:51 PM XXCoder: you'd need probably few hundred 486s to beat rpi4.
07:51 PM unterhaus_: but I don't think intel got better at i/o after the 486
07:52 PM XXCoder: bus have been upgraded bunch of tmes
07:52 PM XXCoder: it'd not keep up with drives speed otherwise
08:04 PM roycroft: i've had rpis that have lasted for years
08:04 PM roycroft: i've had rpis that have barely lasted a few months
08:04 PM roycroft: reliability is my major concern with them
08:05 PM roycroft: i'd use a mesa ethernet board for the motion control stuff regardless of the host computer
09:32 PM Rab_ is now known as Rab
09:48 PM CaptHindsight[m]: lots of options for RPI4 replacements for hobby machines
10:02 PM * roycroft thinks this conversation has turned circular
10:03 PM yaqwsx2 is now known as yaqwsx
10:29 PM W1N9Zr1 is now known as W1N9Zr0
11:21 PM mrec: did anyone ever use steppers in velocity mode? Are the steppers free-running then?
11:22 PM mrec: I would like to make some plastic gears, while I cut the teeth with the regular A axis I would like to part it off afterwards ... for parting a free running A axis would be nice
11:38 PM mrec: So the question is ... is it possible to switch the mode between velocity and position control on the fly
11:53 PM pcw-home: Yes, this is done with spindle orientation