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  • ihavenofish
  • ihavenofish
14 Sep 2024 18:52
Replied by ihavenofish on topic Problems with Lichuan Ethercat servo drive

Problems with Lichuan Ethercat servo drive

Category: EtherCAT

videos!

I wanna see this actually moving a machine. Interesting about the CSV/CSP, but I think it makes sense in relation to what someone else said in another thread, that you are getting the reported position one frame late, so it always appears to lag, even though it "isn't".

But also cool that you seem to have linux tuning the motion so tight in velocity mode. More options is better. Am I right that in velocity mode you can increase the cycle clock? (1khz to 2 or 4, I forget, maybe that was only on delta).
  • machinedude
  • machinedude's Avatar
14 Sep 2024 18:22 - 14 Sep 2024 18:30
Replied by machinedude on topic What do you really get for a $350 desk top engraver ?

What do you really get for a $350 desk top engraver ?

Category: Show Your Stuff

i played around and tried my best to scientific but putting my hand on the spindle and jogging things around ended up doing me the most good :)

i did not see much of anything adjusting control settings. so the only thing helpful was the max position following error getting reduced and the closed loop holding current percentage getting changed.

i can tell just by the sound of things and the vibration difference things should be a little better than before.

do some test cutting and cross my fingers and hope that was enough :)
  • PCW
  • PCW's Avatar
14 Sep 2024 18:15
Replied by PCW on topic PWM/frequency signal as input to Mesa card

PWM/frequency signal as input to Mesa card

Category: Driver Boards

One big issue with reading the plasma voltage is that the GND connection
will have large (possibly 50V or more) high frequency transients when the
torch fires. This makes is very easy to damage connected devices. This is why
the THCAD is fully isolated and has only a few pF of capacitance between the
plasma side and the control side.

Funny aside: We had to change the name of the THCAD on a invoice for a
shipment to Brazil as anything with the letters THC gets held up in customs...
  • Pro_El
  • Pro_El's Avatar
14 Sep 2024 17:54
M66 disable time-function Help was created by Pro_El

M66 disable time-function Help

Category: G&M Codes

Greetings 

I need M66 to wait for signal without time limit.

I can use M66 P0 L4 Q5, but after 5 seconds G-code continue. Some times need to wait long time so i need if it is posible simple sollution to wait and only continue after input signal go High.

I read a lot of post but did not find some simple sollution. Thank you in advanced
  • zz912
  • zz912's Avatar
14 Sep 2024 17:42
simpockets.tbl in tests was created by zz912

simpockets.tbl in tests

Category: General LinuxCNC Questions

Hello,

If I run:
linuxcnc /home/zdenek/linuxcnc/linuxcnc-2.9/tests/toolchanger/toolno-pocket-differ/random/sim.ini

It return:
emc/tooldata/tooldata_common.cc, 304: Failed to open tool table file 'simpockets.tbl': No such file or directory

So I looked into:
github.com/LinuxCNC/linuxcnc/blob/53fce3...r/random/sim.ini#L41

There is not "../" or "./"
Is it OK?
Is it bug?

I am not experts for automatic tests. I dont know which simpockets.tbl is correct. Or right simpockets.tbl is created automatically?
  • paulsao
  • paulsao's Avatar
14 Sep 2024 16:43 - 14 Sep 2024 16:45
Replied by paulsao on topic Inssues Arc Start

Inssues Arc Start

Category: Plasmac

If I place the start cut on the ·x axis, the deviation appears a few cm from beginning the cut, and if I change the  perforation to the axis "y " and the deviation goes to the y axis, it is always a few cm from the perforation.
  • tommylight
  • tommylight's Avatar
14 Sep 2024 16:07
Replied by tommylight on topic PWM/frequency signal as input to Mesa card

PWM/frequency signal as input to Mesa card

Category: Driver Boards

7i84 should also have 4 analog inputs that can do up to VCC, so yes you can use it to measure 9V, but at low resolution and at low speeds.
Although speed might not be much of an issue for slow cutting with plasma, the resolution is as it will cause big jumps when correcting.
Buy a THCAD.
Or make a THC using a "voltage to frequency converter" chip, plenty of those around and quite cheap, until you figure out you need high voltage isolation and care with wiring and stuff, so it really does not pay off to build one, given the price of THCAD is really low for what you get.
  • tommylight
  • tommylight's Avatar
14 Sep 2024 15:59
Replied by tommylight on topic Inssues Arc Start

Inssues Arc Start

Category: Plasmac

Most probably from a kink in the air hose to the torch.
Is it always in the same place on the table?
  • paulsao
  • paulsao's Avatar
14 Sep 2024 15:51
Replied by paulsao on topic Inssues Arc Start

Inssues Arc Start

Category: Plasmac

Thank you very much for your help, replace the torch head and it works normally, I have a question, why does the arc deviate? I am cutting some squares and the arc deviates a few centimeters after starting the cut, the consumables are new.
  • vre
  • vre
14 Sep 2024 15:14
Replied by vre on topic PWM/frequency signal as input to Mesa card

PWM/frequency signal as input to Mesa card

Category: Driver Boards

I have also 7i84 and didn't know these analog inputs.
can use these inputs to read 0-9v analog plasma arc voltage?
  • Henk
  • Henk
14 Sep 2024 14:41
Replied by Henk on topic Ethercat installation from repositories - how to step by step

Ethercat installation from repositories - how to step by step

Category: EtherCAT

HI
A couple of weeks ago i installed a the iso from rodw's google drive, worked fine, no problems.

This time, i tried the one from the downloads page, and also again the google drive one, but i get these errors. I have seen similar errors in this thread, but the sollutions are either not clear or doesnt work for me.

i ran apt update, and also apt upgrade as per the sticky, but these errors appear when i try installing linuxcnc-ethercat. I ran the script from forum.linuxcnc.org/ethercat/53785-instal...-repositories#309963
but still get errors as seen below
linuxcnc@linuxcnc:~$ sudo apt install linuxcnc-ethercat
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
  linux-headers-6.1.0-23-amd64 linux-headers-6.1.0-23-common
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  autoconf autoconf-archive automake autotools-dev ethercat-dkms ethercat-master libethercat libltdl-dev libtool m4
Suggested packages:
  gnu-standards autoconf-doc libtool-doc gfortran | fortran95-compiler gcj-jdk m4-doc
The following NEW packages will be installed:
  autoconf autoconf-archive automake autotools-dev ethercat-dkms ethercat-master libethercat libltdl-dev libtool linuxcnc-ethercat m4
0 upgraded, 11 newly installed, 0 to remove and 0 not upgraded.
Need to get 2,415 kB/5,387 kB of archives.
After this operation, 86.6 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Ign:1 http://download.opensuse.org/repositories/science:/EtherLab/Debian_12 ./ ethercat-dkms 1.6.1.g419f621-1+8.3                                                                            
Ign:2 http://download.opensuse.org/repositories/science:/EtherLab/Debian_12 ./ ethercat-master 1.6.1.g419f621-1+8.3
Ign:3 http://opensuse.mirror.liquidtelecom.com/repositories/science%3A/EtherLab/Debian_12 ./ linuxcnc-ethercat 1.40.0.g8a607c0-0
Ign:1 http://download.opensuse.org/repositories/science:/EtherLab/Debian_12 ./ ethercat-dkms 1.6.1.g419f621-1+8.3
Ign:2 http://download.opensuse.org/repositories/science:/EtherLab/Debian_12 ./ ethercat-master 1.6.1.g419f621-1+8.3
Ign:3 http://opensuse.mirror.liquidtelecom.com/repositories/science%3A/EtherLab/Debian_12 ./ linuxcnc-ethercat 1.40.0.g8a607c0-0
Ign:1 http://download.opensuse.org/repositories/science:/EtherLab/Debian_12 ./ ethercat-dkms 1.6.1.g419f621-1+8.3
Ign:2 http://download.opensuse.org/repositories/science:/EtherLab/Debian_12 ./ ethercat-master 1.6.1.g419f621-1+8.3
Ign:3 http://opensuse.mirror.liquidtelecom.com/repositories/science%3A/EtherLab/Debian_12 ./ linuxcnc-ethercat 1.40.0.g8a607c0-0
Err:1 http://download.opensuse.org/repositories/science:/EtherLab/Debian_12 ./ ethercat-dkms 1.6.1.g419f621-1+8.3
  Could not connect to opensuse.mirror.liquidtelecom.com:80 (2c0f:fe40:8001:10::1). - connect (101: Network is unreachable) Could not connect to opensuse.mirror.liquidtelecom.com:80 (197.155.77.1), connection timed out
Err:2 http://download.opensuse.org/repositories/science:/EtherLab/Debian_12 ./ ethercat-master 1.6.1.g419f621-1+8.3
  Unable to connect to opensuse.mirror.liquidtelecom.com:http:
Err:3 http://opensuse.mirror.liquidtelecom.com/repositories/science%3A/EtherLab/Debian_12 ./ linuxcnc-ethercat 1.40.0.g8a607c0-0
  Unable to connect to opensuse.mirror.liquidtelecom.com:http:
E: Failed to fetch http://opensuse.mirror.liquidtelecom.com/repositories/science%3A/EtherLab/Debian_12/all/ethercat-dkms_1.6.1.g419f621-1%2B8.3_all.deb  Could not connect to opensuse.mirror.liquidtelecom.com:80 (2c0f:fe40:8001:10::1). - connect (101: Network is unreachable) Could not connect to opensuse.mirror.liquidtelecom.com:80 (197.155.77.1), connection timed out
E: Failed to fetch http://opensuse.mirror.liquidtelecom.com/repositories/science%3A/EtherLab/Debian_12/amd64/ethercat-master_1.6.1.g419f621-1%2B8.3_amd64.deb  Unable to connect to opensuse.mirror.liquidtelecom.com:http:
E: Failed to fetch http://opensuse.mirror.liquidtelecom.com/repositories/science%3A/EtherLab/Debian_12/amd64/linuxcnc-ethercat_1.40.0.g8a607c0-0_amd64.deb  Unable to connect to opensuse.mirror.liquidtelecom.com:http:
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
linuxcnc@linuxcnc:~$ sudo apt install linuxcnc-ethercat
E: Conflicting values set for option Signed-By regarding source http://download.opensuse.org/repositories/science:/EtherLab/Debian_12/ ./: /etc/apt/trusted.gpg.d/science_EtherLab.gpg != /etc/apt/trusted.gpg.d/science_EtherLab.gpg.key.binary.gpg
E: The list of sources could not be read.

Any idea how to fix this?
Thanks
Henk
  • CORBETT
  • CORBETT's Avatar
14 Sep 2024 14:39
Replied by CORBETT on topic Ethercat build from source - full instructions

Ethercat build from source - full instructions

Category: EtherCAT

Rod, I was proud of that sticky... but you were the one that got it up there to start with.
  • CORBETT
  • CORBETT's Avatar
14 Sep 2024 14:37 - 14 Sep 2024 15:01
Replied by CORBETT on topic EtherCAT Communication Issues, Lost Frames, Interruptions in Program Execution

EtherCAT Communication Issues, Lost Frames, Interruptions in Program Execution

Category: EtherCAT

@stenly

I am positive Sascha dropped support for RTAI back years ago, and this would have been before Scott started the new branch that everyone is working from on the REPO.  (I can remember Sascha stating that no one is using RTAI now and he was dropping support)

Be aware that RTAI had a lot of work arounds back in the day.  The last time that I built with RTAI was back in 2015 and that was under Debian 7 Wheezy with LCNC 2.6...  Back before 2015, RTAI was dominate as LCNC did not play well with PREEMPT.  But somewhere around 2015-2017, PREEMPT took over.  I am pretty sure that Sascha fixed the "mutex" problem back before PREEMPT came into play.  I worked heavily on the RTAI builds back between 2013-2015, and I am sure I have all my notes from back then on the work arounds.  Also, you mentioned about "missing modules", I am sure you are talking about the "kernel modules" as that was a problem back with RTAI builds.  I am extremely busy and never on here, but I will try to do a RTAI build over the weekend and see if it will work without doing a bunch extra work.  Two weeks ago, I did a minimal Debian 12 with LCNC 2.10, ECAT 1.6, and Sascha's code, but that was with PREEMPT...  I will do my best to try and do a build and let you know something.

Also, in the BIOS... yes you have to be "legacy" and under the "drives' section you need to check if it is in "RAID" mode.  If you have more than one SSD/drive hooked up, it will try to automatically turn RAID on and you will get the BOOT errors you are describing.


Hope it helps...
Robert


"""EDIT"""    
I forgot to add that you MUST get the "kernel modules" installed to get RTAI working.  If you do not get them installed, you will NOT be able to do the build as it will fail while building.  Just wanted to make sure you were aware of that.

 
  • PedPEx
  • PedPEx
14 Sep 2024 14:35
Replied by PedPEx on topic JMC Servo in PP mode

JMC Servo in PP mode

Category: EtherCAT

Hello benezan,

i tested a JMC iHSV57-30-18-36-EC yesterday and got it working in LinuxCNC without any problems or needing to configuring the drive via its RS232 interface.
Mine started up in OPMODE 8 (CSP) and was usable right out of the box. Unfortunately not all inputs are working as expected, just the CW and CCW are working as expected.

You can find my config and machine files here:
github.com/PedPEx/plasma-cutter-LinuxCNC.../main/JMC-Servo_Test
  • Sandro
  • Sandro
14 Sep 2024 14:35 - 14 Sep 2024 16:19
Replied by Sandro on topic Problems with Lichuan Ethercat servo drive

Problems with Lichuan Ethercat servo drive

Category: EtherCAT

This is my full configuration. Please note this is for a hobby machine and I cannot take responsibility for any present or not present safety features. Use at your own risk.

Slave 0 is the Cat IO board which can be found on Aliexpress.
Slave 1 is a DVS 1.8 kW servo motor with 23 bit absolute encoder, which I am using as spindle. I have set the encoder to 17 bit incremental at the moment. The same XML configuration as for the Lichuan servos works for this one as well.
Slaves 2-4 are the Lichuan servos for my three axes.

I was having issues using the Lichuans in csp mode, due to quite a substantial following error. For this reason I have set them to csv mode. This way I was able to do some PID tuning and clamping down the error to a few microns. I was also playing arround with the parameters on the servo drives directly to improve on the following error further. Most parameters did not do a lot in my case. However, P08.15 "Load inertia ratio" helped a lot. For the axes X and Y I have currently set it to about 12 and for Z-axis to about 7.
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