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Definitely do the grub (kernel command line) change, also the pinirq script will have
minimal effect unless you add the isolcpus line.

 

Hello everyone. 
I know there are plenty of other threads about this topic, and I think I read them all, still I struggle to solve the issues that I am having.

My setup is:

• Dell Wyse 5070 with Celeron J4105 4-core cpu THIN CLIENT
• realtek onboard NIC
• fresh Linuxcnc 2.9.3 install
• brandnew Mesa 7i76eu, flashed with pktUART firmware

I experience issues when I startup Linuxcnc / probebasic.
Most of the time the system errors out right after startup with "error following read...". Sometimes I am "lucky" and it works for maybe 5minutes before it errors out. 

What I did so far (after reading in this forum for 2 nights):

• I ran sudo chrt 99 ping -1.001 -q 10.10.10.10 to get some statistics. Here is the result:
  
  179555 packets transmitted, 179555 received, 0% packet loss, time 180656ms
  rtt min/avg/max/mdev = 0.052/0.065/8.974/0.036
  
• disabled all BIOS options regarding power management, hyperthreading, ... etc
• Installed R8168-dkms driver (sudo apt-get install r8168-dkms)
  While searching in this forum, I found that some people had to install linux headers first. I did not do that. 
  When I run a script to identify the used drivers (JCW posted this somewhere a while ago), i get the followig result:
  ./edriver.txt
  xargs: warning: options --max-args and --replace/-I/-i are mutually exclusive, ignoring previous --max-args value
  enp1s0 : r8169
  wlp0s12f0 : iwlwifi
  
  Is this result "expected? Or did the driver installation not work?
  Other people posted that they had to install linux-headers and purge the old driver... 
  
• then I found a script that JCW posted in another thread that pins the IRQ somewhere (I honestly dont really understand whats behind this, but still this is the output):
  cnc@linuxcnc:~/gcodes$ sudo ./pinirq.txt enp1s0
  Cores: 4
  Old CPU Mask: f
  Set device enp1s0 IRQ 122 CPU mask to 8
  
  However, it did not improve my ping / latency at all. Do I need to do anything prior to that? Isolating something?

What I have not done yet:

• editing the kernel parameters in grub customizer (quiet isolcpus= 3 pcie.aspm=0 r8168.eee_enable=0 pcie_aspm=off idle=poll).
  I dont really understand what this does, therefore I hesitated to run it. 
• .... 

Another question... almost all other threads regarding this issue link to a tutorial / troubleshooting file that was hosted by @rodw on google drive, but the link is dead. Could someone provide this file?

regards and thx.
Sebastian
 

Hello,

I am a bit new to linuxcnc but have mostly used mach3 in the past. So far things are going very well except this one issue.  I am wondering if there is a way to access more than 9 coordinate systems in linuxcnc?

For example on this doc page it states

linuxcnc.org/docs/html/gcode/coordinates.html

"This chapter introduces you to offsets as they are used by the LinuxCNC. These include:

• Machine Coordinates (G53)

Nine Coordinate System Offsets (G54-G59.3)

Global Offsets (G92) and Local Offsets (G52)"


On mach3 they have implemented G59 PXXX
where XXX is (iirc) between 1 and 255, giving access to 255 coordinate systems. I don't need 255 but i do need about 30.  Is there any way to achieve such a thing with linuxcnc?

Maybe you can write your own macro to load the offsets from a file or something like that if only 9 workpiece coordinates are implemented in linuxcnc?

Any suggestions on how to approach adding coordinate systems would be welcome.

Thank you for your time.

s

 I have been trying to use the spotting operation on my plasma cutter. 

it is a file with an array of many holes. 
so I used the drilling operation. 
I used the postprocessor for local materials.

So I got it to work well. Does the spots as expected. 
But there is some strange behavior on my machine. 
If I load the file the machine uses the jogging as set on the machine. But if I activate the button for slow jogging it still jogs fast. After a couple of spots the machine stops at random amounts of spots. 
The pause resume button does nothing. 
I have to stop the program completely and resume at the line where it stopped. 

Is the local materials post processor ok for spotting operations or do I need a custom post processor for this?

 


 

I managed to get all 3 axes working.
For the inputs, do I need to connect the GND to GPIO33, for example?
It's ok the inputs work
Could someone help me to make the changes in the al file and the ini file

I found Freecad is one of the few free cad programs that don’t need an internet connection.
I used other free programs like google sketch and others. Google sketch free only works on the internet. Others just became paid versions.
I chose Freecad I because I know it will remain free and it does not require internet.

For doing simple stuff like brackets and everything else you do on a plasma cutter Freecad is easy to use.
There was a steep learning curve but it was absolutely worth it.

Using letters on free am seems a bit complicated so I use Inkscape.

Sometimes I design a part export it to svg and add some letters.

Constraints on the sketcher was a bit difficult to learn. After watching some YouTube videos I got a better understanding and absolutely love it.

Spreadsheet functions are also excellent.

For example you can design a flansch. Link a spreadsheet to it and change the size number of holes etc by just entering the numbers in the spreadsheet.

So, I've done a lot of progress . After I changed the usb  to RS232 cable( don't buy low quality RS232 to usb cable) I've been able to connect to my driver and configure the external enable and the internal disengage of the motor brake(you need to power the io from external 24v source with Leadshine) . After all this i wired a 24v Finder relay for the motor enable commanded by the mesa,when i launch the program the mesa power  the relay and enable all the drivers. Now  I'm able to move the axis from linuxcnc, but i think I'll change the basic Axis gui with probebasic for more userfriendly interface. For the motor wiring I have to thank the Leadshine tech support, they reply very fast, and for mesa i refered to this guy video  (very helpfull, the 7i76EU version it's same wiring confirmed by Mesa tech support , for shematics and 3d support prototipe refer to this  and official 7i76E pdf ). So now i've to do some tests and project all the electrical supply for all that stuff, and i have to adapt the motors to the mecanical part with new mounting plates(i think i will design them with Fusion 360 and buy them from PCBway machining or other). That's all.