I thought of one bus per leg, but the Raspberry Pi only supports two CAN
busses and I think this is a common limitation not just on the Pi. But
I think we just figured out that one CAD FD can do 12 motors at 20 Hz.
At any rate, I'm not going to be able to afford all those motors. 12 of
them
On Sat, 22 Aug 2020 at 02:22, Chris Albertson wrote:
> One other easy trick is to have two CAN busses one for left and the other
> for right.
One bus per leg makes sense to me. The intra-leg coupling needs to be
a bit tighter than the inter-leg
--
atp
"A motorcycle is a bicycle with a pandemon
I don't think it actually runs that fast, I think you calculated the
maximum rate possible with one motor on the bus.
More reasonable is to assume 20 updates per second and 12 motors on the
bus. This rate could work. I looked for 10 minutes through the Chetha
code in Gethub and foud they do upd
On Sat, 22 Aug 2020 at 00:45, Frank Tkalcevic
wrote:
> trailers that is a total of 200 bits, best case, or about 416 updates per
> second for 12 motors on 1MHz bus.
>
> I was expecting the update rate to be a lot lower than that
And you are assuming one bus.
On the cars I work on we have a priv
I was looking in more detail at the MIT Cheetah and found this page -
https://www.robotdigg.com/product/1667/MIT-Robot-Dog-high-torque-Joint-Motor
-or-DD-Motor
It says that each motor takes an 8 byte payload to drive a motor, and that
motor then replies with a 6 byte packet. After you add the CAN
On Friday 21 August 2020 15:35:26 Gene Heskett wrote:
> On Friday 21 August 2020 12:45:11 Chris Albertson wrote:
> Checking just now, its up to a
> step over a mm up, the brim looks pretty gossamer, but the higher
> stuff doesn't look like its starving, just on a diet. Might have a
> usable part
I appreciate all the help. This is a low-priority project and I don’t have much
time to work on it and I‘m learning as I go here.
I’ve tested all main powered devices for ground loops by individually
disconnecting each ground and testing with an ohm meter. It appears that I took
Gene’s advice
On Fri, 21 Aug 2020 at 21:11, jrmitchellj wrote:
> OK, I see it correct under the GUI section, but i was looking under the
> next section (G-Code Programming) that shows it with the older method.
Can you be more specific? A link would help.
Or, better still, fix it and make a pull request on G
OK, I see it correct under the GUI section, but i was looking under the
next section (G-Code Programming) that shows it with the older method.
Another question on this subject, In the touch-off window, is P0
just shorthand to touch off in the current workspace (G54, G55, etc)?
--J. Ray Mitchell
On Friday 21 August 2020 12:45:11 Chris Albertson wrote:
> You remind my of something I always do and it would help with you
> adhesion problem and allows parts to be removed with less effort. I
> always place a fillet around the edge of the part. So whatever
> surface is touching the build
> ...
> On CAN you can take advantage of the fact that all devices read the bus at
> the same time. Each reader decides what information it wants to read and
> ignore the rest so a time-sync heartbeat could be implemented if the nodes
> all needed to be time synchonized. ...
Yes all devices need
> I think the question was intended to be more theoretical and asks about
> "exactly" synchronizing commands. The LinuxCNC/SPI solution is not
> that. SPI works only because it is so fast that the error in
> synchronization is tiny and goes unnoticed.
Using a Micro controller it is possible t
On Tue, 18 Aug 2020 at 16:11, jrmitchellj wrote:
>
> I just checked the 2.7 & 2.8 versions documentation, and they have the same
> description as teh 2.9 version.
And that should now be the same, but different.
http://linuxcnc.org/docs/devel/html/gui/axis.html
--
atp
"A motorcycle is a bicycle
You remind my of something I always do and it would help with you
adhesion problem and allows parts to be removed with less effort. I
always place a fillet around the edge of the part. So whatever
surface is touching the build plate should have a fillet, even if it is
only 0.5mm radius it hel
On 08/20/2020 09:59 PM, John Dammeyer wrote:
-Original Message-
From: Jon Elson [mailto:el...@pico-systems.com]
Sent: August-20-20 7:36 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Mist Coolant
On Thu, 20 Aug 2020 at 21:36, John Dammeyer
wrote:
The mill I have ha
I just saw the title. Ones is Ethernet and the other Parallel and spi.
Stupid me.
Leonardo Marsaglia
El vie., 21 ago. 2020 09:38, Leonardo Marsaglia
escribió:
> Hello to all,
>
> I'm about to purchase a set of cards for the two projects I'm working on.
>
> Basically I plan to use the following
Hello to all,
I'm about to purchase a set of cards for the two projects I'm working on.
Basically I plan to use the following setup:
___ 7i33
/
7i80HD/7I90HD - 7i44 -- 7i70/7i71
\___ 7i52s
My main doubt is what'
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