Yes, I know. Even things like a servo loop where you have to read an
encoder is bi-directional but I think it matters where the loop is closed
If the loop close inside the micro controller or the FPGA there would be
very little latency. Different if the data has to flow all the way up to
a user
On 23 April 2018 at 03:29, Chris Albertson wrote:
> Look at the example of streaming music. As long
> as the buffer never goes empty there are no dropouts.
This is OK so long as the information flow is purely one-way. Add a
conductor to your musical example and it breaks down.
(probing, spindle-
On Monday 23 April 2018 00:39:25 jeremy youngs wrote:
> Tried pnc config on my host computer, 7i 90 wasn't specified in the
> drop down. It's been about 2 months since last update, this is a 64
> bit system. My lappy is a Dell 610 and has parallel port. I am able to
> connect with my cell as a hot
Tried pnc config on my host computer, 7i 90 wasn't specified in the drop
down. It's been about 2 months since last update, this is a 64 bit system.
My lappy is a Dell 610 and has parallel port. I am able to connect with my
cell as a hotspot but downloading the linuxcnc os will probably kill my
data
;
> > -Original Message-
> > From: Kenneth Lerman [mailto:kenneth.ler...@se-ltd.com]
> > Sent: April-22-18 10:39 AM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Mesa choices
> >
> > I wouldn't want to share an ethernet between r
On Sun, 22 Apr 2018, jeremy youngs wrote:
Date: Sun, 22 Apr 2018 21:06:38 +
From: jeremy youngs
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] Mesa choices
Peter, is the softdmc loaded on the card
Peter, is the softdmc loaded on the card or a download? Thank you
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On Sun, 22 Apr 2018, Gene Heskett wrote:
Date: Sun, 22 Apr 2018 11:10:03 -0400
From: Gene Heskett
Reply-To: "Enhanced Machine Controller (EMC)"
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Mesa choices
On Saturday 21 April 2018 23:50:09 jeremy youngs wrote:
S
lectronics.
John Dammeyer
> -Original Message-
> From: Kenneth Lerman [mailto:kenneth.ler...@se-ltd.com]
> Sent: April-22-18 10:39 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Mesa choices
>
> I wouldn't want to share an ethernet betwe
On Sunday 22 April 2018 13:30:18 Chris Albertson wrote:
> Back to the title subject. I'm going to need to buy a Mesa card
> soon. Is there any reason to prefer the 7i90 over the 7i92 or other
> ethernet cards. It seems to me that even if I still owned a PC with
> a parallel port the computer w
On Sunday 22 April 2018 11:44:37 jeremy youngs wrote:
> On Sun, Apr 22, 2018, 10:10 Gene Heskett wrote:
> > ISTR they come unprogrammed, and set to be connected to a parport
> > for programming the correct config for your use into it with
> > mesaflash. It has a backup recovery that must be used
I wouldn't want to share an ethernet between real time control and ssh,
file transfer, ...
Either buy a PC with two ethernet ports or just add a second cheap one
connected by USB. Then use the USB one for all of the usual stuff where
there is no real time constraint.
Ken
On Sun, Apr 22, 2018 at
screw terminals for connections for
a step/dir interface. Saves the cost of a breakout board.
John Dammeyer
> -Original Message-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: April-22-18 10:30 AM
> To: Enhanced Machine Controller (EMC)
> Subject: R
Back to the title subject. I'm going to need to buy a Mesa card soon.
Is there any reason to prefer the 7i90 over the 7i92 or other ethernet
cards. It seems to me that even if I still owned a PC with a parallel
port the computer would also have an Ethernet port which is 10X faster and
uses chea
Well said Chris.
I worked on a system once where the 24V system bus shared a common ground
with a 12V instrument bus. The system bus could have as much as 20A flowing
through it as a Servo motor moved one section. There was also other
equipment that sporadically drew more and less current. The
Gene is right. Many people don't understand grounds. The star ground is
not magic. It is based on two basic laws of physics. Just two things to
remember
1) It is a fundamental law of electricity the current ONLY flows if there
is a loop. Take a straight piece of wire and connect one end to
On Sun, Apr 22, 2018, 10:10 Gene Heskett wrote:
>
> ISTR they come unprogrammed, and set to be connected to a parport for
> programming the correct config for your use into it with mesaflash. It
> has a backup recovery that must be used long enough to reset it to
> parport communications IF its b
On Saturday 21 April 2018 23:50:09 jeremy youngs wrote:
> So, got the 7i90 today, been swimming through the manuals.
> I haven't yet connected the board , that will likely happen mid to
> late week as I seem to have all of the automotive work i want right
> now ( life could be worse) . I downloade
So, got the 7i90 today, been swimming through the manuals.
I haven't yet connected the board , that will likely happen mid to late
week as I seem to have all of the automotive work i want right now ( life
could be worse) . I downloaded the support software and manuals. I am
speculating that the sof
Sorry. Something went strange here. This was never meant for this list
> -Original Message-
> From: John Dammeyer [mailto:jo...@autoartisans.com]
> Sent: April-20-18 3:08 PM
> To: 'Enhanced Machine Controller (EMC)'
> Subject: Re: [Emc-users] Mesa choices
>
bonding with the leads of the switches etc.
John
> -Original Message-
> From: jeremy youngs [mailto:jcyoung...@gmail.com]
> Sent: April-20-18 1:14 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Mesa choices
>
> 7i90 and cable should be here t
7i90 and cable should be here tomorrow, timing belts and pulleys on the way
too. I'm going to see if I can get a pinout on these renco encoders , I
figure once the mess card is hooked up I can count the pulse in one
rotation and go from there. Pretty busy the next few days so it will be mid
week be
You can simply cut a 50 pin ribbon cable in half then strip all 50
wires and solder then to a piece of perf board. It would be a great
deal of work but there is not reason you can not make you one BOB.
They are pretty low-tech.
I asked around about making PCBs in a milling machine and this is the
On Wednesday 18 April 2018 11:27:43 jeremy youngs wrote:
> Is there any reason why using idc to db and then my existing breakout
> boards won't work? I like the 7i42 but it's over budget at this
> moment.
None that I'm aware of. I make my own, using a vice to close the idc
stuff. I also use the
Is there any reason why using idc to db and then my existing breakout
boards won't work? I like the 7i42 but it's over budget at this moment.
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engaging tech
7i90 coming Gene, I'm going to run with my in stock Bob's for now I will
use the optoless one for encoder count , and the opto'd one for controls .
I'm using that optiplex 720 we were discussing last month with the real
time issues. I'm getting a USB wifi adapter so I can post those messages
and fi
https://forum.linuxcnc.org/54-user-exchange/32824-mesa-parts-4-sale
Have some Mesa boards for sale.
Cheers
Bengt
Den 2018-04-17 kl. 09:33, skrev Gene Heskett:
On Monday 16 April 2018 23:41:51 jeremy youngs wrote:
I'm controlling+-10 v carotron rcp 205-000 DC brush drive 25 amps,
igbt isolat
On Monday 16 April 2018 23:41:51 jeremy youngs wrote:
> I'm controlling+-10 v carotron rcp 205-000 DC brush drive 25 amps,
> igbt isolated. At 180v .
> So from mulling this over , I think the 5i90 seems my best choice .
There is not a 5i90, perhaps you mean the 7i90HD? With that, you'll need
3
I'm controlling+-10 v carotron rcp 205-000 DC brush drive 25 amps, igbt
isolated. At 180v .
So from mulling this over , I think the 5i90 seems my best choice . I still
yet have to get coming a USB wifi adapter , but work in the shop has been
steady so time for this project is whenever I can. But I
On Monday 16 April 2018 20:11:46 jeremy youngs wrote:
> The 5i25 will work with my existing breakout boards if I'm
> understanding correctly. And a spinx1 will get me to an analog +-10
> that I can flip flop for reversal. I'm thinking 5i25 and softdmc
> should get me where I want to be. And be ex
The 5i25 will work with my existing breakout boards if I'm understanding
correctly. And a spinx1 will get me to an analog +-10 that I can flip flop
for reversal. I'm thinking 5i25 and softdmc should get me where I want to
be. And be expandable later on . Can the 5i25 output a 0-5 v analog, it
woul
On 15 April 2018 at 04:05, jeremy youngs wrote:
> I'm thinking 7i43 ran by epp at
> this time. I have a pair of servo motors with renco encoders and an
> inexpensive hbridge (36v15a) . I've tried sorting through everything and
> just seem to end up confused. I'm looking to get x/y under servo pow
On Saturday 14 April 2018 22:05:25 jeremy youngs wrote:
> Good day gents, probably for pcw Andy or Gene. Any pointers on
> selecting mesa cards as needed? I'm looking for inexpensive and
> versatile. I don't have a lot of spare funds to contribute.
I have 2 fav cards, mainly because I have zero e
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