Re: [Emc-users] Ethercat master for Automation ( Not directly related to Linuxcnc so a little bit off topic)

> On 2 May 2018 at 17:20, Nicklas Karlsson wrote: > > This is not directly directly to Linuxcnc but it's the best forum I could > > find. > > Have you looked on the LinuxCNC forum? There is an extensive EtherCAT > discussion there (People are running actual

Re: [Emc-users] Ethercat master for Automation ( Not directly related to Linuxcnc so a little bit off topic)

On 2 May 2018 at 17:20, Nicklas Karlsson wrote: > This is not directly directly to Linuxcnc but it's the best forum I could > find. Have you looked on the LinuxCNC forum? There is an extensive EtherCAT discussion there (People are running actual machines with

[Emc-users] Ethercat master for Automation ( Not directly related to Linuxcnc so a little bit off topic)

This is not directly directly to Linuxcnc but it's the best forum I could find. Does anybode here have Exereince with a some kind of Ethercat master for Automation run on an ordinary computer which works well? Or tried speedgoat in Matlab? To use soem for IO is not a problem but configuration

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

On Sat, 16 Dec 2017 11:47:52 -0500 Dave Cole wrote: > >>I used Twincat3 but have no idea what it does to scan the network and then > >>connected to switch Wireshark do no spot any Ethercat packets. > > That is really odd.  It seems to me that it would be really helpful

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

> >>I used Twincat3 but have no idea what it does to scan the network and then > >>connected to switch Wireshark do no spot any Ethercat packets. > > That is really odd.  It seems to me that it would be really helpful to > be able to see TwinCat initialize the secondary via Ethernet if you can

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

I used Twincat3 but have no idea what it does to scan the network and then connected to switch Wireshark do no spot any Ethercat packets. That is really odd.  It seems to me that it would be really helpful to be able to see TwinCat initialize the secondary via Ethernet if you can grab the

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

> The lights do not turn on the switch port that your Ethercat device is > plugged into? Yes I tried both ports and soldered the EEPROM. Software in micro controller is not an issue because SPI port is not turned on until configured by the EEPROM. I will give up Twincat since I should not use

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

On Thu, 14 Dec 2017 12:35:29 -0500 Dave Cole wrote: > I would plug into the device directly, without a switch in the middle. Tried it and nothing happened. I will try to connect micro controller to EEPROM socket, it could be done in parallel so I could use micro

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

I would plug into the device directly, without a switch in the middle. Dave On 12/13/2017 4:19 PM, Nicklas Karlsson wrote: The lights do not turn on the switch port that your Ethercat device is plugged into? Light turn on both on LAN9252 card and switch. Did you install TwinCat 2 or TwinCat

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

> The lights do not turn on the switch port that your Ethercat device is > plugged into? Light turn on both on LAN9252 card and switch. > Did you install TwinCat 2 or TwinCat 3.   I have TwinCat 3 loaded on a > laptop here. I use twincat 3 but there are two switches in between on the local

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

> Did you install TwinCat 2 or TwinCat 3.   I have TwinCat 3 loaded on a > laptop here. Twincat 3 > Check this out.  This is for TwinCat2 > https://infosys.beckhoff.com/english.php?content=../content/1033/tcsystemmanager/reference/ethercat/html/EtherCAT_intro.htm= > > See the Suchen button.  I

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

Am 13.12.2017 um 16:57 schrieb Dave Cole: See the Suchen button. I think that is "search" in German. German suchen corresponds to engl. seek, old engl. seacan. Peter -- Check out the vibrant tech community on one of

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

The lights do not turn on the switch port that your Ethercat device is plugged into? Did you install TwinCat 2 or TwinCat 3.   I have TwinCat 3 loaded on a laptop here. Check this out.  This is for TwinCat2

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

With cable connected to SPI port at correct edge and direction connection LED is turned on both switch and LAN9252 Ethercat board. Just have to figure out howto scan the Ethernet network and buy a EEPROM. On Tue, 12 Dec 2017 09:50:02 -0500 Dave Cole wrote: > FWIW,

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

I have installed and try to figure out how to scan Ethernet network for Ethercat devices. I connected to a switch but LEDs do not come on so I guess something is wrong. On Tue, 12 Dec 2017 09:50:02 -0500 Dave Cole wrote: > FWIW, the Twincat software is a free

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

FWIW, the Twincat software is a free download. Dave On 12/11/2017 2:39 PM, Nicklas Karlsson wrote: These links provided me with the answer. The EEPROM is supposed to be programmed via Ethernet connector. Beckhoff have special software for this and I also see Twincat system manager, maybe

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

These links provided me with the answer. The EEPROM is supposed to be programmed via Ethernet connector. Beckhoff have special software for this and I also see Twincat system manager, maybe it's just manager software according to standard? On Mon, 11 Dec 2017 12:17:03 +0200 Roland Jollivet

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

I wrote just before I went to bed and will. Usually I have an hour or two each day. 2017-12-11 11:17 GMT+01:00 Roland Jollivet : > Have the looked at this application note; AN1920 > web=1=rja=8=0ahUKEwjO4ZvL24HYAhVHJMAKHXWPC >

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

Have the looked at this application note; AN1920 ? And maybe this article

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

> looks like it according to page 24 > > These pins are the Distributed Clock Sync (OUT) or > Latch (IN) signals. The direction is bitwise configurable. > Note: These signals are not driven (high impedance) until the EEPROM is > loaded. Basic problem is I do not know how to get LAN9252 started.

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

> looks like it according to page 24 > > These pins are the Distributed Clock Sync (OUT) or > Latch (IN) signals. The direction is bitwise configurable. > Note: These signals are not driven (high impedance) until the EEPROM is > loaded. On page 24 in the datasheet for LAN9252 are the SPI pins.

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

looks like it according to page 24 These pins are the Distributed Clock Sync (OUT) or Latch (IN) signals. The direction is bitwise configurable. Note: These signals are not driven (high impedance) until the EEPROM is loaded. On 9 December 2017 at 10:45, Nicklas Karlsson

Re: [Emc-users] Ethercat master --> DieBieSlave LAN9252

> Hardware for master is hard to find because you don't need it. Any normal > Ethernet port works. Master is a software-only solution. > > You can choose a simple less redundant network topology. Double ring is > used because it can tolerate failure and it's not more expensive then daisy >

Re: [Emc-users] Ethercat master ... --> slave (DieBieSlave)

> What hardware are you runing this on. I assume just a generic STM32F > board? Yes, a STM32F303 something. SPI peripheral is same or similar on other STM32F but maximum speed may vary. I am a little bit confused about the EEPROM connected to the LAN9252 and need to think about the license.

Re: [Emc-users] Ethercat master (development board)

Infineon XMC4300 have builtin Ethercat peripheral but it require two external drivers, two sets of MII pins and extra cost is roughly the same as using external chip. 2017-10-31 22:27 GMT+01:00 Chris Albertson : > Yes oddly enough it's a significanly cheaper product

Re: [Emc-users] Ethercat master (development board)

Yes oddly enough it's a significanly cheaper product made from > significanlty more expensive components. Oddly? No. This is what always happens with electronics if you wait. Today Ethercat looks to be the way the world of automatic is going. It was adopted as a preferred standard in China

Re: [Emc-users] Ethercat master (development board)

> On 31 October 2017 at 20:22, Nicklas Karlsson > wrote: > > I found this > > http://www.microchip.com/developmenttools/ProductDetails.aspx?PartNO=EVB-LAN9252-SPI > > and I guess it will work almost any micro controller but unfortunately > > it's does not seems to

Re: [Emc-users] Ethercat master (development board)

On 31 October 2017 at 20:22, Nicklas Karlsson wrote: > I found this > http://www.microchip.com/developmenttools/ProductDetails.aspx?PartNO=EVB-LAN9252-SPI > and I guess it will work almost any micro controller but unfortunately it's > does not seems to be

Re: [Emc-users] Ethercat master (development board)

I found this http://www.microchip.com/developmenttools/ProductDetails.aspx?PartNO=EVB-LAN9252-SPI and I guess it will work almost any micro controller but unfortunately it's does not seems to be available for sale yet, it's not in there own internet shop. Nicklas Karlsson

Re: [Emc-users] Ethercat master (low latency)

> Andy, > > Thanks, Will research STMBL. > > I think now that any protocol that puts data for all axis inside the same > packet has to work. Yes it is, only problem is feedback and it is here Ethercat is good but a lower rate for feedback should be OK for almost all applications.

Re: [Emc-users] Ethercat master (low latency)

On 31 October 2017 at 03:29, Chris Albertson wrote: > What I'm looking for is a mathematically justified specification for > allowed variation on the servo loop period. If you hit the side of the spindle with a hammer, what frequency does the machine ring at? That's

Re: [Emc-users] Ethercat master (low latency)

Andy, Thanks, Will research STMBL. I think now that any protocol that puts data for all axis inside the same packet has to work. One question: So I have a LinuxCNC system writing (X,Y,Z) to ethernet at a nominal 1,000 points per second. That is one point every 0.001 seconds. What is the

Re: [Emc-users] Ethercat master (realtime scheduling)

> This seems to be a very nice design although he points to possible > improvements. > https://github.com/DieBieEngineering/DieBieSlave > > The firmware is here. It seems to be under active development as the last > change was two months ago. >

Re: [Emc-users] Ethercat master (low latency)

On 30 October 2017 at 21:18, andy pugh wrote: > This is where it gets complicated. I have certainly seen ten of them > in one place at the same time. But I think that if you want a lot, you > need to make them or have them made at the moment. Here are some in action:

Re: [Emc-users] Ethercat master (low latency)

On 30 October 2017 at 20:58, Nicklas Karlsson wrote: >> You could look at STMBL.It's an STM32-based servo drive. Communication >> with the LinuxCNC system is by CAT5 cables carrying the Mesa >> Smart-Serial protocol. > > What kind of signals there in this protocol?

Re: [Emc-users] Ethercat master (realtime scheduling)

> The video is very good and he walks through the design in detail. > Actually, it was enough to make me think canbus might be simpler. Canbus is simpler but I calculated speed will be at the limit so I will not build something new with CANbus.

Re: [Emc-users] Ethercat master (low latency)

> A real time host is still needed for CNC coordinated motion with Ethercat > slaves. Ethercat does no change this at all. Laptops will work in some > circumstances but can cause troubles with multiple ms real time delays > when doing power management tasks. A smart device could figure out the

Re: [Emc-users] Ethercat master (low latency)

> You could look at STMBL.It's an STM32-based servo drive. Communication > with the LinuxCNC system is by CAT5 cables carrying the Mesa > Smart-Serial protocol. What kind of signals there in this protocol? Is it possible to get like ten of these? > (quadrature and step/dir also supported) >

Re: [Emc-users] Ethercat master (low latency)

> What I'm looking into is a distributed system with computing pushed closer > to where it is used. Grapical stuff should happen on a GPU connected to > the monitor. Servo lop can be close on the motor Control loop for servo make sense to run twice each switching period, slower might be

Re: [Emc-users] Ethercat master (low latency)

On Monday 30 October 2017 04:22:06 Chris Albertson wrote: > The whole _point_ of EMC was to do the realtime on off-the shelf > > > general purpose computers rather than on specialised hardware. > > Yes, that was the point. But look today people are building systems > using a $35 ARM based "PC

Re: [Emc-users] Ethercat master (low latency)

On 30 October 2017 at 08:22, Chris Albertson wrote: > I think the current trend in the industry is to move the control loops > closer to the motors ... > In fact I can by a STM32F on a PCB for less than the price of a good power > cable. ... > What I'm looking into

Re: [Emc-users] Ethercat master (SOEM,

> > The cheapest system I could find is by Leadshine in China and the > smallest size controller is $350 per axis but they are unable to > support you if you are in North America buying low retail quantities. > > I looked into what it would take to build a DIY Ethercat based client > controller.

Re: [Emc-users] Ethercat master (low latency)

The whole _point_ of EMC was to do the realtime on off-the shelf > general purpose computers rather than on specialised hardware. > Yes, that was the point. But look today people are building systems using a $35 ARM based "PC connected to a $100 FPGA board and then to a couple hundred dollars

Re: [Emc-users] Ethercat master (realtime scheduling)

> > First circuit board I made had ordinary Ethernet. For Ethercat two ports > > are needed but hardware should be same, there are few chips available to > > chose from. This guy used a board from Beckhoff and did not make the > > circuit boards himself. > > > > I do not think so. Look here and

Re: [Emc-users] Ethercat master (realtime scheduling)

> > First circuit board I made had ordinary Ethernet. For Ethercat two ports > > are needed but hardware should be same, there are few chips available to > > chose from. This guy used a board from Beckhoff and did not make the > > circuit boards himself. > > > > I do not think so. Look here and

Re: [Emc-users] Ethercat master (realtime scheduling) (hardware chips different)

> Maybe I did not write clearly enough. The drivers and circuit board layout > constraint is the same for Ethercat as ordinary Ethernet but the internal > handling in the chip is different so a chip which could talk Ethercat is > needed. > > ++ about slave ++ Yes, 100% correct a chip is needed.

Re: [Emc-users] Ethercat master (realtime scheduling)

On Sun, Oct 29, 2017 at 1:19 PM, Nicklas Karlsson < nicklas.karlsso...@gmail.com> wrote: > > First circuit board I made had ordinary Ethernet. For Ethercat two ports > are needed but hardware should be same, there are few chips available to > chose from. This guy used a board from Beckhoff and

Re: [Emc-users] Ethercat master (realtime scheduling)

On 29 October 2017 at 20:39, Nicklas Karlsson wrote: > I found Ehterlab http://www.etherlab.org/en/index.php but unfortunately it > does not seems to have been actively developed for a while. Latest kernel > patch is 3.4.69 whil I currently use 4.9.51 Look at the

Re: [Emc-users] Ethercat master (realtime scheduling)

On Sun, 29 Oct 2017 11:29:05 -0700 Chris Albertson wrote: > On Sun, Oct 29, 2017 at 10:51 AM, Nicklas Karlsson < > nicklas.karlsso...@gmail.com> wrote: > > > > >So far I spent only a few hours to look for linuxcnc Ethercat driver. > > > > > >

Re: [Emc-users] Ethercat master (low latency)

> > Now that we have an "existence proof" I', thinking that > > EMC/linuxCNC/MachineKit have partitioned the problem wrong and the result > > is that it forces a requirement for hard real time to far up the chain. > > OK, "wrong" is to strong of a word to fault the original designers. They > >

Re: [Emc-users] Ethercat master (realtime scheduling) (hardware chips different)

> The slave can NOT use standard ethernet hardware. There is the hitch. you > can buy Ethercat slave controllers for quite a lot of money or try to make > one but for that you need some special ASIC chips and custom PCBs. Not a > home shop type project. That said here is a VERY detailed walk

Re: [Emc-users] Ethercat master (low latency)

On 29 October 2017 at 17:42, Chris Albertson wrote: > Now that we have an "existence proof" I', thinking that > EMC/linuxCNC/MachineKit have partitioned the problem wrong and the result > is that it forces a requirement for hard real time to far up the chain. > OK,

Re: [Emc-users] Ethercat master (realtime scheduling)

> > > >So far I spent only a few hours to look for linuxcnc Ethercat driver. > > > > > > https://forum.linuxcnc.org/24-hal-components/22346-ethercat- > > hal-driver?limitstart=0 > > > > I found the EtherCAT master is integrated into the Linux kernel. Also > > support for RTAI, Xenomai, RT-Prempt.

Re: [Emc-users] Ethercat master (realtime scheduling)

On Sun, Oct 29, 2017 at 10:51 AM, Nicklas Karlsson < nicklas.karlsso...@gmail.com> wrote: > > >So far I spent only a few hours to look for linuxcnc Ethercat driver. > > > > https://forum.linuxcnc.org/24-hal-components/22346-ethercat- > hal-driver?limitstart=0 > > I found the EtherCAT master is

Re: [Emc-users] Ethercat master (low latency)

> Now the problem is I can't afford an $8000 Ethercat based servo controller. > But I wonder it the same principle can't be applied to any serial multi > drop bus? As long as there is a "master" that users a hardware clock to > shift bits out of a hardware buffer then it should work Well one

Re: [Emc-users] Ethercat master (low latency)

<emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] Ethercat master (low latency) On Sun, Oct 29, 2017 at 3:37 AM, Nicklas SB Karlsson < nicklas.karlsso...@gmail.com> wrote: Then of course he is uses an $8,000 servo controller to hit those (x,y,z) points so no surprise the circle

Re: [Emc-users] Ethercat master (low latency)

On Sun, Oct 29, 2017 at 3:37 AM, Nicklas SB Karlsson < nicklas.karlsso...@gmail.com> wrote: > > > Then of course he is uses an $8,000 servo controller to hit those (x,y,z) > > points so no surprise the circle is spot-on perfect. > > > > > > I am always impressed when some one finds a way to do

Re: [Emc-users] Ethercat master (low latency)

On 29 October 2017 at 13:22, Nicklas Karlsson wrote: >So far I spent only a few hours to look for linuxcnc Ethercat driver. https://forum.linuxcnc.org/24-hal-components/22346-ethercat-hal-driver?limitstart=0 -- atp "A motorcycle is a bicycle with a pandemonium

Re: [Emc-users] Ethercat master (low latency)

> Look at the bits in the wire: The PC sends a single packet that has three > 32 byte payloads for X, Y and Z. The bits are sent at one hundred million > bits per second so the time between payloads is always EXACTLY 0.0256 > seconds. There is far less than a nanosecond of jitter in that

Re: [Emc-users] Ethercat master (low latency)

> Then of course he is uses an $8,000 servo controller to hit those (x,y,z) > points so no surprise the circle is spot-on perfect. > > > I am always impressed when some one finds a way to do impossible things > with no effort. To pay someone else to do work is a simple method to do things

Re: [Emc-users] Ethercat master (low latency)

Watch the video. The guy is using a normal laptop PC and LinuxCNC. Already we know the real time performance is not great. He is sending all the data to his milling machine over one Ethernet cable using the built-in Ethernet port.He mills a circle and the circle is dead-on perfect to his

Re: [Emc-users] Ethercat master (SOEM,

I disagree a little. I think the problem is only money, not technical. Yes it seems to be well past the technical ability of most of the DIY community. If you can stand $2,000 or more per axis Bosh (intraDrive) will sell you a really nice system and they can support it. They are driven by can

Re: [Emc-users] Ethercat master (low latency)

> > Most LinuxCNC systems ar set up so the PC sends out things like PWM or > > step/directin. These are VERY low level but with this setup, not the > > communication is at a much higher level, even the home and limit > > switches are detected by the controller. > > You would still need a

Re: [Emc-users] Ethercat master (linuxcnc tree)

I not know these ... i use only that "driver" http://www.etherlab.org/en/ethercat/ bkt 2017-10-27 19:26 GMT+02:00 Nicklas SB Karlsson : > There is nothing available in ordinary linuxcnc development tree? > > > > On Fri, 27 Oct 2017 11:07:59 +0200 > theman

Re: [Emc-users] Ethercat master (SOEM,

Ok. Just fun I would say it's a good thing. I also tried the Estun. I would say great product for the price paid. If you have to do a 3D printer that works for 48 hours, or an electrorube device, I recommend you continue to use mesa cards.Personally, I did not have problems on the drive side, but

Re: [Emc-users] Ethercat master (SOEM,

On 28 October 2017 at 01:58, Chris Albertson wrote: > Most LinuxCNC systems ar set up so the PC sends out things like PWM or > step/directin. These are VERY low level but with this setup, not the > communication is at a much higher level, even the home and limit >

Re: [Emc-users] Ethercat master (SOEM,

My German is very poor. I can't follow what he is saying but he has enough English subtitles that I can figure out how it works. There is also a part-2 video. Almost certainly someone on this list can tell us if he is saying anything we'd need to know. First off he is using a LAPTOP. He is

Re: [Emc-users] Ethercat master (SOEM,

http://www.anaheimautomation.com/products/servo/servo-systems.php?tID=1107=t=527 Not cheap, but if you are putting them on a production machine... that has to run everyday and makes $$, then these are really inexpensive. I think these are about half of what Automation Direct is selling

Re: [Emc-users] Ethercat master (SOEM,

On Friday 27 October 2017 13:14:30 Dave Cole wrote: > Check out this video - this is 2013 and he is using Ethercat with > LinuxCNC. Unfortunately I can't understand him.  :-( > > https://www.youtube.com/watch?v=yR9rCFavFjU > > Dave > That looks like well over a kilobuck just to wave some masking

Re: [Emc-users] Ethercat master (linuxcnc tree)

There is nothing available in ordinary linuxcnc development tree? On Fri, 27 Oct 2017 11:07:59 +0200 theman whosoldtheworld wrote: > I use the suggestion and indication from linuxcnc forum: > > https://forum.linuxcnc.org/24-hal-components/22346-ethercat-hal-driver > >

Re: [Emc-users] Ethercat master (SOEM,

Thank you! Dave On 10/27/2017 1:18 PM, Martin Dobbins wrote: He does do some that you might understand  https://www.youtube.com/watch?v=JU2lFg1rwgg Martin From: Dave Cole Check out this video - this is 2013 and he is using Ethercat with LinuxCNC.

Re: [Emc-users] Ethercat master (SOEM,

He does do some that you might understand  https://www.youtube.com/watch?v=JU2lFg1rwgg Martin From: Dave Cole Check out this video - this is 2013 and he is using Ethercat with LinuxCNC. Unfortunately I can't understand him. :-(

Re: [Emc-users] Ethercat master (sync manager, fmmu) ??

> Hardware for master is hard to find because you don't need it. Any normal > Ethernet port works. Master is a software-only solution. > > You can choose a simple less redundant network topology. Double ring is > used because it can tolerate failure and it's not more expensive then daisy >

Re: [Emc-users] Ethercat master (SOEM,

Check out this video - this is 2013 and he is using Ethercat with LinuxCNC. Unfortunately I can't understand him.  :-( https://www.youtube.com/watch?v=yR9rCFavFjU Dave On 10/27/2017 6:40 AM, Nicklas Karlsson wrote: I make my own hardware, it's only for fun and I do not intend to earn money on

Re: [Emc-users] Ethercat master (SOEM,

I make my own hardware, it's only for fun and I do not intend to earn money on it. It's however useful to know how it works during normal working hours. 2017-10-27 11:07 GMT+02:00 theman whosoldtheworld : > I use the suggestion and indication from linuxcnc forum: > >

Re: [Emc-users] Ethercat master (SOEM,

I use the suggestion and indication from linuxcnc forum: https://forum.linuxcnc.org/24-hal-components/22346-ethercat-hal-driver about SOEM, The basic implement is not realtime so is ok for user command, not so for drive command. Any how my decision is not utilize ethernet bus for drive

Re: [Emc-users] Ethercat master (SOEM,

On Thu, 26 Oct 2017 13:36:26 +0200 theman whosoldtheworld wrote: > I'm working with it now using linuxcnc implementation ... and in past with > backoff device. ... I just started to look a day or two ago, which Ethercat implementation?

Re: [Emc-users] Ethercat master (SOEM,

I'm working with it now using linuxcnc implementation ... and in past with backoff device. But in addiction .. I know some plc producer work for openplc and similar project linux based ... someone has informed me that in the coming months it will be possible to implement ethernet protocols of

[Emc-users] Ethercat master (SOEM,

I spent an hour or so and found two Ethercat master implementations: linuxcnc Ethercat https://github.com/sittner/linuxcnc-ethercat SOEM https://github.com/OpenEtherCATsociety/SOEM and also this. https://github.com/ros-industrial/ethercat-soem Are there anyone else working on Ethercat right

Re: [Emc-users] Ethercat master

Maybe like $7 then connected via SPI with integrated driver. Integrated in micro controller is cheaper but then two drivers are required which increase price. For $1 - $3 it is possible to get good micro controller for control of hardware (servo motors), the more expensive is needed then

Re: [Emc-users] Ethercat master

What is the cost of an Ethercat chip ? Dave On 10/24/2017 11:48 AM, Nicklas Karlsson wrote: Hardware for master is hard to find because you don't need it. Any normal Ethernet port works. Master is a software-only solution. Time triggered transmit would be useful to get perfect timing and

Re: [Emc-users] Ethercat master

> Hardware for master is hard to find because you don't need it. Any normal > Ethernet port works. Master is a software-only solution. Time triggered transmit would be useful to get perfect timing and fully utilize bandwidth. > You can choose a simple less redundant network topology.

Re: [Emc-users] Ethercat master

I think that all of the big industrial automation suppliers have moved to some variant of Ethernet. Siemens has Profinet, Allen Bradley has Ethernet IP,  Allen Bradley was using Sercos and is moving away from it.   I think that is saying a lot.   I've used Siemens Ethernet solution and it is

Re: [Emc-users] Ethercat master

Hardware for master is hard to find because you don't need it. Any normal Ethernet port works. Master is a software-only solution. You can choose a simple less redundant network topology. Double ring is used because it can tolerate failure and it's not more expensive then daisy chain. On

[Emc-users] Ethercat master

I have tried different hardware for real time communication and decided for the best quality Ethercat or maybe Sercos III is the path forward. Only real real disadvantage is they both have chosen double with two rings in opposite direction which probably make twice as expensive as needed, one