Chris
I would like to run Linuxcnc but headless so the PocketBeagle will be
great for that. I dont really need the network connection as the system
will run a couple of simple commands that can be activated from buttons.
My brief required a simple operators interface so it's buttons only.
------ Original Message ------
From: "Chris Albertson" <[email protected]>
To: "Marius Liebenberg" <[email protected]>; "Enhanced Machine
Controller (EMC)" <[email protected]>
Sent: 2018-04-05 18:54:35
Subject: Re: [Emc-users] One servo system
The comment to use psocketbeagle and MK if Linux is required is good.
I just looked up psocketbeagle and I don't see any network interface.
Likely if you want a Linux based controller it is so you can access
it remotely. You might get a USB/Wifi dongle to work but it would
be better to buy a board with built-in networking if networking is
important. But the pocket beagle could always use a serial line for
networking if all you need is a text window and a few file transfers.
If you don't need Linix then it can be much simpler (An Arduino would
work) but remote access is a very nice feature to have. Nice enough
that I'd go with a card that has built in wifi.
On Thu, Apr 5, 2018 at 6:32 AM, Marius Liebenberg
<[email protected]> wrote:
Hi Alexander
I decided that this is the way to go. I did see that there is some
talk that
not all kernels are supported on the board.
Is there a place where I can go look to see how to get this board
setup with
MachineKit please?
------ Original Message ------
From: "Alexander Rössler" <[email protected]>
To: "Marius Liebenberg" <[email protected]>
Sent: 2018-04-04 13:37:56
Subject: Re: [Emc-users] One servo system
I think a simple real-time component should also do the trick in
case
the ladder logic component (it's also RT right?) does not work for
your
application.
The PocketBeagle also has a PRU like the BeagleBone, so step
generation
or encoder feedback should be fine.
--
Alexander
Marius Liebenberg writes:
I just looked at the PocketBeagle and it seems to be a good choice
for
servo or stepper.
It will have to be headless so I would imagine that I will be
using
ladder to control the system with.
The track length is 6m, a button is pressed and I accelerate to
8m/s and
stop at the other end waiting for a command to do the same in the
opposite direction. Machine must home in the one axis on demand as
well.
Would the ladder logic route be good enough or are there some
other
suggestions?
------ Original Message ------
From: "Alexander Rössler" <[email protected]>
To: "Enhanced Machine Controller (EMC)"
<[email protected]>
Cc: "Marius Liebenberg" <[email protected]>
Sent: 2018-04-04 09:24:43
Subject: Re: [Emc-users] One servo system
Machinekit + PocketBeagle is good combo if you are looking for
something
running Linux.
Chris Albertson writes:
Of course. Write a PID based control loop and put it an
something
like an Arduino. I've done this a few times the control the
wheels
of
a mobile robot.
The details depend on the interfaces to botkhthe motoring the
higher
level control
As for higher level control... Is it a human using a joystick
or
some
kind of automation that does the same thing repetivity or must
the
device interact with the environment some how. Perhaps opening
a for
as a person approaches.
Then I have to ask what kind of hardware driver you have.
Some
drivers do most of the work for you. These might take a
step/direction pulse, r have an analog input. But other
drivers are
just an H-Bridge and raw encoder signals. This is the kind
of
serves I use. I end u using a small micro controler (Arduino
or
ARM-M) and relaying on a PID library.
In ant case most of your effort will be spent in the interfaces
not
the actual PID control loop as that is just a few calls to a
PID
library
On Wed, Mar 28, 2018 at 8:15 AM, Marius Liebenberg
<[email protected]> wrote:
Hi all
I have to put together a system that will use one servo to
drive a
small
platform over a distance of 6m at a speed of about 25km/h or
8m/s or
there
about.
I feel that using a full computer and mesa card for just one
axis
that does
not need a display sounds a bit excessive. The question is
what are
the
other options if any.
-----------------------------
Regards / Groete
Marius D. Liebenberg
+27 82 698 3251
+27 12 743 6064
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--
Alexander Rössler
HMI Expert at Rössler Systems
Tel: +43 680 1348338
Web: https://roessler.systems
Blog: https://machinekoder.com
[email protected]
Lebnergasse 1/7/7
1210 Wien - Austria
ATU72251528
--
Alexander Rössler
HMI Expert at Rössler Systems
Tel: +43 680 1348338
Web: https://roessler.systems
Blog: https://machinekoder.com
[email protected]
Lebnergasse 1/7/7
1210 Wien - Austria
ATU72251528
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Redondo Beach, California
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