On 10/3/25 20:35, Sam Sokolik wrote:
I will add.. I have been running a rpi4+7i92(ethernet) for the last 5
years on a small mill. I have done some pretty crazy stuff with it. Once
I got it working (again - 5 years ago) I have had 0 issues with it. It
just works. (even though a bit underpowered)
The rpi5 is night and day. I have used it in a hal only monarch spindle
drive controller, Plasma table and also the same small milling machine.
No issues.
sam
I wonder how the bananapi-m5 might work with my setup, with a 7i90HD and
a bunch of 7i42TA's? I currently have an rpi4b running the Sheldon.
I am concerned with the power draw of the off-lease dell's I am using 3
of to drive my other machines but the draw is around 300 watts a
machine. Where the rpi5b and its monitor total about 23 watts. That's a
considerable power savings I can see in my electric bill.
I'm also using a group of the even faster bananapi-m5's to drive 3d
printers, which seem to have decent latency for that. They are all
running armbian, currently based on the arm64 version of ubuntu, full
desktop install. There, the launch speed is limited by the u-sd card
bootup, but the apps once running only have one speed limit, how fast
the hotend can melt filament, which limits it to around 200mm/second
printing speeds.
And I've had nothing but headaches from bookworm on this box, so when I
install next, I will probably switch to ubuntu, full desktop flavor. So
I'm hoping that at some point in the coming year, you generate an
install iso based on the newest ubuntu LTS. My experience with the
arm64 in the form of armbian has been 1000% more stable, it just runs
from power failure to power failure. A UPS makes that forever, but
doubles the power draw. Nobody makes a UPS small enough for the pi's.
I made it another year at around 7AM local time. I'm now 91 yo.
On Fri, Oct 3, 2025 at 12:50 PM Sam Sokolik <[email protected]> wrote:
I would normally say an PC is the best route (and I would probably still
use off lease machines)
but
I have been playing with a few rpi5's and they are quite amazing. The
latency and performance is up there with a normal pc..
It could probably even do decent software step generation. ( I have used
software PWM to run amc drives.. ) Coupled with a mesa card - even better.
It is a known quantity. The latency is stable and good.
https://photos.app.goo.gl/dELrZMq6Sb7Qk7ju5
Looks nice. Better than the rpi4b, but it seems more than adequate for
an only 2 axis drive setup. Around 12 u-secs until firefox runs at the
same time. FF hogs IRQ's.
Cheers, Gene Heskett, CET.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Don't poison our oceans, interdict drugs at the src.
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