I have several RPI3's and RPI4's. what I noticed (with the RPI4) more
memory is always better.
There are things they are good at, especially "light-weight" stuff, and
other things they are not. I use one as a datalogger, I tried RPI3
RPI4-1GB/4GB/8GB, and it has timing and temperature issues.
(I am not using them for CNC). I use aa RPI as a datalogger for a
seismograph, that seems to be pushing it, I use one for home
automation, like switching off/on lights (which is not time critical), I
use it for reading humidity/temp data, also fine because there are no
timing critical things with that either. (I don't care if the lights go
on/off a half second sooner or later)
they are pretty powerful little ARM computer/boards.. BUT it is a
$40-$80 piece of equipment... you get what you pay for.
I run CNClinux on a Dell, 172GB, dual cpu, 24 cores, I don't think an
RPI can match that. an RPI might be able to run a CNC machine.. but if
I'd do it, I'd do it for "funsies" to see if I can get away with it and
make a point.
(I've been known to do things like that, just to see if I can get away
with things.)
For example .. what an RPI is not good at... is reliably read a
quadrature encoder output, and I know some use these encoders.
but that's just my 2cts.
Ron
On 6/12/21 5:24 PM, Leonardo Marsaglia wrote:
Hello guys,
As some of you know, I'm finishing a CNC router and I'm about to purchase
all the control hardware. I know Gene, John, and several people here are
running LCNC on the PI with success but I would like to know how much of a
pain in the ass is to get it running well with a 7i76E for controlling the
router.
I'm trying to decide wheter I purchase Rpi 4b or I use a normal PC as I've
been doing with all the other machines. I really like the idea of using
something as portable and small as the Rpi but I don't want to purchase one
just to test right now... I do have a Rpi3 with Octoprint on the ender but
I don't know if that's a good candidate to test LCNC.
What do you guys think?
Thanks as always and I hope you're all doing well :)
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