Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[Gene Heskett]

On Saturday 01 June 2019 10:09:07 pm Danny Miller wrote:

> Longtime user of the 7i92.  Former user of Mach3/Smoothstepper.
>
> It is very good all around, perfect high performance, and frees you
> from almost any PC latency probs.
>
> It can configure as a plain-jane parallel port that you'd plug and
> play into PMDX-126, but also other things.
>
> Combine with Linux RT-Preempt and it's SO solid
>
> Danny
>
> On 6/1/2019 3:01 PM, Andy Pugh wrote:
> >> On 1 Jun 2019, at 20:52, John Dammeyer 
> >> wrote:
> >>
> >> Therefore under LinuxCNC I need something with say an Ethernet
> >> interface that has two ribbon cables compatible with PC Parallel
> >> port pinout so the latency isn't an issue
> >
> > http://store.mesanet.com/index.php?route=product/product&path=69_62&;
> >product_id=306
> >
I'll toss out that I've converted two of my machines, 1 from parport and 
software stepping, to a 5i25 driving a 7i76d which gave me enough I/O on 
the 7i76d to do everything I was doing without tapping the 2nd breakout 
on the 5i25, and another, also 4 axis, from a 5i25 and two breakouts, to 
a 7i76 with the 5i25 in front of it, and again I now have independent 
home switches so it can home much faster, plus gear shift tallys and 
still have i/o to throw away or run a tool changer with on both machines 
now,  So I'm very happy with the results. If I was to do pendents on the 
GO704, or on the gantry, that would be pretty slow stuff, and I could 
load software encoders enough to hook them up to the 2nd breakout and 
run all that in a 100 hz jog thread. Similar to what I'm doing on the pi 
already since its 7i90 can give me 4 encoders in hardware.  Gotta luv 
it.

> > (Or also look at the 7i80)
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Cheers, Gene Heskett
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Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[Danny Miller]

Longtime user of the 7i92.  Former user of Mach3/Smoothstepper.

It is very good all around, perfect high performance, and frees you from 
almost any PC latency probs.


It can configure as a plain-jane parallel port that you'd plug and play 
into PMDX-126, but also other things.


Combine with Linux RT-Preempt and it's SO solid

Danny


On 6/1/2019 3:01 PM, Andy Pugh wrote:



On 1 Jun 2019, at 20:52, John Dammeyer  wrote:

Therefore under LinuxCNC I need something with say an Ethernet interface that 
has two ribbon cables compatible with PC Parallel port pinout so the latency 
isn't an issue

http://store.mesanet.com/index.php?route=product/product&path=69_62&product_id=306

(Or also look at the 7i80)
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Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[John Dammeyer]

Hi Jon
I did some investigation.  There's some sort of Intel thing that can be 
switched off at the risk of overheating the processor.  Past that I don't know 
what to do in Linux to speed things up.   Given the speed of the processor and 
dual cores I'm amazed at how slow PCs are compared to an 8 bit PIC running 
40Mhz.
John



> -Original Message-
> From: Jon Elson [mailto:el...@pico-systems.com]
> Sent: June-01-19 3:32 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC
> 
> On 06/01/2019 02:52 PM, John Dammeyer wrote:
> > But it's turning out that the PCs I have show a latency of 25uS with on 
> > board
> video and go up to almost 100uS with 3 different low profile video boards.  
> The
> stock motherboard video with WIN-XP can do 75Khz under MACH3.  The
> Smooth Stepper can also do way more.   I need at least 55kHz to get full speed
> from my DC Servos.  Looks like 20 kHz step rate is the max with the existing
> hardware under LinuxCNC.
> >
> >
> If the video makes a difference, then you may be able to do
> better by disabling some of the video acceleration options,
> or changing to a different video driver.
> 
> Jon
> 
> 
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Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[Jon Elson]

On 06/01/2019 02:52 PM, John Dammeyer wrote:

But it's turning out that the PCs I have show a latency of 25uS with on board 
video and go up to almost 100uS with 3 different low profile video boards.  The 
stock motherboard video with WIN-XP can do 75Khz under MACH3.  The Smooth 
Stepper can also do way more.   I need at least 55kHz to get full speed from my 
DC Servos.  Looks like 20 kHz step rate is the max with the existing hardware 
under LinuxCNC.


If the video makes a difference, then you may be able to do 
better by disabling some of the video acceleration options, 
or changing to a different video driver.


Jon


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Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[John Dammeyer]

Hi Andy,

> > On 1 Jun 2019, at 21:22, John Dammeyer  wrote:
> >
> > Really too bad it's not compatible with MACH3 too. At least I can't find
> anything that says it is.
> 
> I don�t know why nobody has written Mach3 drivers for any Mesa cards. It
> ought to be fairly straightforward.
> 

One would think so.  Although since MACH3 isn't really supported anymore since 
it doesn't earn income I can see that the MACH people are more interested in 
flogging their "call home software for licence"  MACH4.

The potential market as WIN-XP systems die, for a straight across port to 
LinuxCNC, seems to me to be really large.  And in fact, I'd take a guess that 
if someone cloned the MACH3 user interface so it had the look and feel of MACH3 
but ran with a newer PC and say that 7192 there'd be a fair number of people 
that would change.  

But I don’t think it would happen instantly.  I know of at least 10 people who 
are running MACH3.  Perfectly happy with it.  See no reason for a new learning 
curve as opposed to making chips.  But once their PC dies and they have trouble 
getting WIN-XP to run on new hardware.  It's a different story.

John




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Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[Peter C. Wallace]

On Sat, 1 Jun 2019, John Dammeyer wrote:


Date: Sat, 1 Jun 2019 13:46:19 -0700
From: John Dammeyer 
Reply-To: "Enhanced Machine Controller (EMC)"

To: "'Enhanced Machine Controller (EMC)'" 
Subject: Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

Thanks Peter,



Therefore under LinuxCNC I need something with say an Ethernet

interface

that has two ribbon cables compatible with PC Parallel port pinout so the
latency isn't an issue




http://store.mesanet.com/index.php?route=product/product&product_id=303
&search=7I92H

is available (just different connector arrangement, still 2x LPT compatible
pinouts)



So then the question is:

With LinuxCNC and a latency measurement in the 25030 to 27420 can this board 
generate the 55kHz stepping pulses?


The steps are generated in hardware so the step rate is independent of latency
Maximum step rate is ~10 MHz. The host needs to run the Servo thread (typically 
at 1 KHz) reliably




I have two DC Servos, 3200RPM.  250 line encoder, and both 3:1 (X) and 4: 1 (Y) 
 reduction to 5TPI screws.

Math says 3200 RPM 53.  RPS.  With 4x 250 line encoder is 1000 lines per 
rev so 5.333kHz stepping pulses.

I expect this will work easily with LinuxCNC.  Yes?



Yes, with the uspace version/Preempt-RT kernel  ( Debian Stretch ISO is easiest 
way to get this )


It might require special firmware to match the PMDX pinout ( usually just a 10 
minute or so job for me )



And do you have a driver for WIN-XP and MACH3 by any chance?



No, that would require different firmware ( buffered motion rather than real 
time commands from LinuxCNC )



Thanks
John




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Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[John Dammeyer]

Thanks Peter,

> >>>
> >>> Therefore under LinuxCNC I need something with say an Ethernet
> interface
> >> that has two ribbon cables compatible with PC Parallel port pinout so the
> >> latency isn't an issue
> >>
> >>
> 
> http://store.mesanet.com/index.php?route=product/product&product_id=303
> &search=7I92H
> 
> is available (just different connector arrangement, still 2x LPT compatible
> pinouts)
> 

So then the question is:  

With LinuxCNC and a latency measurement in the 25030 to 27420 can this board 
generate the 55kHz stepping pulses?

I have two DC Servos, 3200RPM.  250 line encoder, and both 3:1 (X) and 4: 1 (Y) 
 reduction to 5TPI screws.

Math says 3200 RPM 53.  RPS.  With 4x 250 line encoder is 1000 lines per 
rev so 5.333kHz stepping pulses.

I expect this will work easily with LinuxCNC.  Yes?

And do you have a driver for WIN-XP and MACH3 by any chance?

Thanks
John




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Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[Andy Pugh]

> On 1 Jun 2019, at 21:22, John Dammeyer  wrote:
> 
> Really too bad it's not compatible with MACH3 too. At least I can't find 
> anything that says it is.

I don’t know why nobody has written Mach3 drivers for any Mesa cards. It ought 
to be fairly straightforward. 

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Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[Peter C. Wallace]

On Sat, 1 Jun 2019, John Dammeyer wrote:


Date: Sat, 1 Jun 2019 13:22:32 -0700
From: John Dammeyer 
Reply-To: "Enhanced Machine Controller (EMC)"

To: "'Enhanced Machine Controller (EMC)'" 
Subject: Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

Thanks Andy,


-Original Message-
From: Andy Pugh [mailto:bodge...@gmail.com]
Sent: June-01-19 1:02 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC




On 1 Jun 2019, at 20:52, John Dammeyer  wrote:

Therefore under LinuxCNC I need something with say an Ethernet interface

that has two ribbon cables compatible with PC Parallel port pinout so the
latency isn't an issue

http://store.mesanet.com/index.php?route=product/product&path=69_62&pro
duct_id=306

(Or also look at the 7i80)




http://store.mesanet.com/index.php?route=product/product&product_id=303&search=7I92H

is available (just different connector arrangement, still 2x LPT compatible 
pinouts)




That one looks like it would work.   Since this could be mounted right above or 
beside the PMDX-126 two very short ribbon cables could connect.
Really too bad it's not compatible with MACH3 too. At least I can't find 
anything that says it is.

And that it's out of stock.

John




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Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[John Dammeyer]

Thanks Andy,

> -Original Message-
> From: Andy Pugh [mailto:bodge...@gmail.com]
> Sent: June-01-19 1:02 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC
> 
> 
> 
> > On 1 Jun 2019, at 20:52, John Dammeyer  wrote:
> >
> > Therefore under LinuxCNC I need something with say an Ethernet interface
> that has two ribbon cables compatible with PC Parallel port pinout so the
> latency isn't an issue
> 
> http://store.mesanet.com/index.php?route=product/product&path=69_62&pro
> duct_id=306
> 
> (Or also look at the 7i80)


That one looks like it would work.   Since this could be mounted right above or 
beside the PMDX-126 two very short ribbon cables could connect.
Really too bad it's not compatible with MACH3 too. At least I can't find 
anything that says it is.

And that it's out of stock.

John




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Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[Andy Pugh]

> On 1 Jun 2019, at 20:52, John Dammeyer  wrote:
> 
> Therefore under LinuxCNC I need something with say an Ethernet interface that 
> has two ribbon cables compatible with PC Parallel port pinout so the latency 
> isn't an issue

http://store.mesanet.com/index.php?route=product/product&path=69_62&product_id=306

(Or also look at the 7i80)
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Re: [Emc-users] Dual boot for WIN-XP and LinuxCNC

[John Dammeyer]

Sometimes I feel like I've headed off a cliff wondering why I'm where I am 
halfway down to the water.

The dual boot exercise was to start with MACH3 and eventually migrate to 
LinuxCNC.  

The PMDX-126 with dual parallel port inputs and a number of other nice features 
works well with MACH3 and would also work with the USB Ethernet SmoothStepper.  
Unfortunately the SS is not supported under LinuxCNC.   I have a PMDC-125 with 
USB Smooth Stepper running my JGRO CNC Router.

So I bought a second parallel port card (low profile) which is more than enough 
I/O for what I need.  That all works just fine with LinuxCNC and the PMDX-126.

But it's turning out that the PCs I have show a latency of 25uS with on board 
video and go up to almost 100uS with 3 different low profile video boards.  The 
stock motherboard video with WIN-XP can do 75Khz under MACH3.  The Smooth 
Stepper can also do way more.   I need at least 55kHz to get full speed from my 
DC Servos.  Looks like 20 kHz step rate is the max with the existing hardware 
under LinuxCNC.

Therefore under LinuxCNC I need something with say an Ethernet interface that 
has two ribbon cables compatible with PC Parallel port pinout so the latency 
isn't an issue?

Anything out there or am I stuck with WIN-XP and MACH3?  Changing out the 
PMDX-126 is not an option.

Thanks
John








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Re: [Emc-users] Emc-users Digest, Vol 157, Issue 32

[James Isaac]

From: emc-users-requ...@lists.sourceforge.net 

Sent: Sunday, May 19, 2019 1:48 PM
To: emc-users@lists.sourceforge.net
Subject: Emc-users Digest, Vol 157, Issue 32

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Today's Topics:

   1. Re: How come (Dave Cole)
   2. Re: How come (Dave Cole)
   3. Re: Unusual help request. (Peter C. Wallace)
   4. Unusual help request. (Davide)
   5. Re: Unusual help request. (Peter C. Wallace)


--

Message: 1
Date: Sun, 19 May 2019 12:34:21 -0400
From: Dave Cole 
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] How come
Message-ID: 
Content-Type: text/plain; charset=utf-8; format=flowed

I do have to wonder though... if these Tesla cells were no longer usable
for a Tesla, why would anyone think they would be good in a stationary
application unless they were derated by quite a bit.
$1200 is far from free.

Dave

On 5/17/2019 12:24 PM, Kirk Wallace wrote:
>
> Here is a fairly common surplus Tesla module:
>
>> https://www.ebay.com/itm/262333679871
>
> If these have have not been abused after they were removed from the
> car they should last many thousands of deep cycles.? They are 6s but a
> 7th s can be added in order to cycle them deeper on a common 24 volt
> system.
>
> My system (single, living in an RV) is close to this except I am using
> two Johnson Controls modules rewired as 7s:
>> https://www.mobile-solarpower.com/tesla-solar-battery-diy.html
>> https://www.ebay.com/itm/123187038180
>
> This technology is changing so quickly that it is hard to keep current
> and reviews become stale in a month or two.
>
>
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Message: 2
Date: Sun, 19 May 2019 12:42:48 -0400
From: Dave Cole 
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] How come
Message-ID: <99799212-f825-5ca2-a90b-98cd63bbd...@gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed

That's what I understood...? I won't be owning a Tesla until that changes.
Dave

On 5/18/2019 2:50 PM, Bruce Layne wrote:
> Tesla has adopted the software
> rental model where the customer doesn't really own anything.



--

Message: 3
Date: Sun, 19 May 2019 10:21:46 -0700 (PDT)
From: "Peter C. Wallace" 
To: "Enhanced Machine Controller (EMC)"

Subject: Re: [Emc-users] Unusual help request.
Message-ID: 
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed

On Sun, 19 May 2019, Nicklas Karlsson wrote:

> Date: Sun, 19 May 2019 18:27:44 +0200
> From: Nicklas Karlsson 
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Unusual help request.
>
>> On Sun, 19 May 2019, Davide wrote:
>>
>>> Date: Sun, 19 May 2019 16:26:26 +0200
>>> From: Davide <77...@tiscali.it>
>>> Reply-To: "Enhanced Machine Controller (EMC)"
>>> 
>>> To: Emc-users@lists.sourceforge.net
>>> Subject: [Emc-users] Unusual help request.
>>>
>>> Hi, I have a strange setup to solve. So I'm asking you an help, on the top
>>> of your knowledge (sorry for any language mistake) Some time ago I have
>>> built an inverted wire tetrapod, which was made by 4 winches placed at a max
>>> distance of 20 meters one each other in a rectangular shape. So until now it
>>> was ok to have a 48v 20A DC power supply and a parallel bob near my pc (an
>>> asrock q1900b-itx), and transmit step/dir signals thru ethernet cables to
>>> the stepper drivers inside the winches.
>>>
>>> Now I have to modify that to make a very little object fly inside a soccer
>>> arena, so the motors will be placed at 80 meters one each other, and i'm
>>> really worried that a step every 10 will arrive to the drivers, if any at
>>> all.. The further motor will be at 150mt if I'm lucky..
>>>
>>> An idea can be a mesa ethernet card, but I should use 4 of them, so I'm
>>> asking you if you think is possible to make 4 of them work with linuxcnc?
>>>
>>> Another can be convert in some way step dir signals to optic fiber
>>> transport. But i couldn't find anything to buy.
>>>
>>> Any other suggestion?
>>> Thanks, Davide.
>>>
>>
>>
>> 150 meters is no problem for 100 KHz RS-422 (Spec is 1220 meters at 100 KBPS
>> ~= 50K steps/second) So just using good line drivers/ receivers should be 
>> fine
>> It ma