Hardware Problem - Latency Test and Screen Freeze - Linuc CNC 10.04

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14 Mar 2021 08:37 #202197 by JohannesL
Dear LINUX CNC Community,

my name is Johannes and I am from Limburg, Germany.
Years ago I build my own CNC machine.
Now I have replaced the old PC and bought a new one.
Problem ist that the system is working in general, but if I start an Gcode
it fails very quickly and it is not stable running. I guess the latency could be an problem.
Please help me, maybe some experts can read my Test results , see appendix.

Thanks a lot :-)



File Attachment:

File Name: Error_CNC_JLo.rar
File Size:796 KB
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16 Mar 2021 22:22 #202528 by andypugh
The latency looks OK.

What version of LinuxCNC are you running? The error list reports issues with shared memory. I suspect that you were previously running LinuxCNC v 2.3 and have upgraded to something newer and the config has changed.

If you run one of the sample configs, do you see the same problems?

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28 Mar 2021 21:37 #203951 by JohannesL
Hello Andypugh,

I tried out both versions Linux EMC² 10.04 and also an older version LINUX EMC² Version 8.04. I guess it would be helpful to check the RAM. The PC stops / hangs up itself serveral times ... If you think that the Latency Test is ok I check my Hardware. Which critera shows me that the latency test is fine ?

Thanks for your help

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29 Mar 2021 17:37 #204075 by andypugh
A latency of less than half your minimum step period is probably OK in general.

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30 Mar 2021 21:39 #204153 by andypugh

I tried out both versions Linux EMC² 10.04 and also an older version LINUX EMC² Version 8.04.


Those are both very old. 10.04 was released April 2010 and 8.04 is from April 2008.

With a new PC it is probably worth trying a new Linux, try the current LiveCD from:
www.linuxcnc.org/downloads/

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01 Apr 2021 19:42 #204419 by JohannesL
Good evening Andypugh,

I tried tonight new RAM modules without success ...
So I thought it is time to buy a new CNC PC no old hardware anymore which is second hand and ofter not working proberly...
Can I easily import my configuration with the Wizard my Step Konfiguration ?

Product type: Mini PC
Hard drive type: SSD Special features: native parallel port (LPT), front USB, fanless
Operating system: Windows 7 Brand: ASG
Series: IPC Hard disk capacity: 120 GB
Release year: 2020 Model: IPC01
SSD hard drive capacity: 120GB width: 282
RAM size: 4GB Length: 268
Processor speed: 2.4GHz Maximum memory size: 8GB
Country and region of manufacture: Germany Processor: Intel Pentium
Operating system version: Professional Manufacturer warranty: 1 year
EAN: 124354 Graphics processor: Integrated graphics
Connectivity: LPT, LAN RJ-45, RS232, PS / 2, Audio, HDMI, USB 2.0, USB 3.0, VGA Form factor: Mini Desktop
Color: Black


Ebay Germany Link:

www.ebay.de/itm/Mini-PC-CNC-PC-Steuer-PC...1dfffc0e54%7Ciid%3A1
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01 Apr 2021 21:59 #204438 by andypugh
Yes. If you make a backup of your entire "linuxcnc" directory you can then make a clean LinuxCNC install, copy the configs across und das war's

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02 Apr 2021 12:49 #204492 by JohannesL
Hello andypugh,

thanks a lot for your help :-)
I will write you next week, when the CNC pc arrives.Which version can you recommend for the installation ? have all files stored so it should be easly be possibler to configure the machines setup....

Have a nice weekend and happy eastern

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02 Apr 2021 13:04 #204494 by andypugh

Which version can you recommend for the installation ?


I think I would start with the standard LinuxCNC installer image .

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11 Apr 2021 08:24 #205612 by JohannesL
Hello Andypugh,

I have received my new PC.
Everything roks fine with Linux CNC and Debian 10.
Non I try to mill a round wooden part and an other problem occurs. ...
The limit switches react due to little vibration and so want to ask
Are there any options in LINUX CNC to changes the reaction time or to deactivate
the switches for dedicated situations where vibrations occur for example ?`

Additional I get many new information which are shown now in the left corner.
Normaly I need only X,Y,Z position and thats it. Is is possible the configure the
parameters which are shown in the left corner (positions tools etc.)

Thanks a lot for your help and please enjoy your weekend

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