Step Sale and Velocity

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30 Nov 2019 06:44 - 30 Nov 2019 06:47 #151556 by little_sparky
Sorry simple misreading, changed back to 5000 and that fixed the clipping problem.

I ran some latency testing with the following results, where do I enter these in my .ini or hal files? Or where do they come into calculation?

note: turned off all BIOS power saving options

also note: these errors dont come up straight away, only after some time. I am able to jog and touchoff the 'X' and 'Y' axis, however not the 'Z' axis for some reason.



error



File Attachment:

File Name: my_TESTLin...1-30.hal
File Size:12 KB

File Attachment:

File Name: my_TESTLin...1-30.ini
File Size:5 KB
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Last edit: 30 Nov 2019 06:47 by little_sparky.

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30 Nov 2019 14:18 #151567 by PCW
Replied by PCW on topic Step Sale and Velocity
Ahh, you are running a RTAI LinuxCNC installation.
That will not work with Mesa Ethernet cards,
you need a Preempt--RT kernel.

Not sure if the easiest fix is to install a Preemt-RT kernel on your
existing Linux installation or re-install with a new OS:

www.linuxcnc.org/testing-stretch-rtpreempt/

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30 Nov 2019 22:17 #151611 by little_sparky
Are you sure?

Because I’ve had that problem before and I bought a whole new computer and uploaded one of the images you linked.

This is what uname -a and uname -v give.




Also I am able to run all of my motors and home switches with dual gantry, so surely this means it’s connected? I’m not too sure though.
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30 Nov 2019 22:22 #151614 by PCW
Replied by PCW on topic Step Sale and Velocity
OK that does look like Preemt-RT

Have you disabled all power management options and C1 states greater than C1 in the BIOS?

Also if you have a Intel Ethernet chip in the host PC (check with dmesg | grep -i ether)
you will need to set a driver mode to get decent real time performance

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04 Dec 2019 10:43 #151966 by little_sparky
Thanks for your reply PCW, I had a look in my BIOS setup and I dont have any C1 value (that i know of?) however I disabled everything else.





Also I ran the command you said and got the following, no sure what this means? (I have a dell optiplex 990 which is an intel computer however its been refurbished so who knows whats in it, hopefully doesnt mean I have to buy a third computer)


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04 Dec 2019 10:44 #151967 by little_sparky
Its also weird that I only get the error after running the axis around for a while or if i enter a few manual g code commands that wont work, eg outside the limits.

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04 Dec 2019 10:57 #151969 by tommylight
Replied by tommylight on topic Step Sale and Velocity
That is a Dell enterprise series, you have to disable a lot of stuff in the Performance menu and all the virtualization stuff, plus disable modem and serial, speedstep, turbo, etc.

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04 Dec 2019 12:16 - 04 Dec 2019 12:56 #151981 by little_sparky
Tommylight you are my hero!

Disabled all of the above (except I couldn’t find modem and serial) but also disabled kvm, was I meant to do this?

Either way I ran the machine around for about 20 minutes and have not had an error.
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Last edit: 04 Dec 2019 12:56 by little_sparky.
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04 Dec 2019 13:14 #151988 by tommylight
Replied by tommylight on topic Step Sale and Velocity

little_sparky wrote:
Disabled all of the above (except I couldn’t find modem and serial) but also disabled kvm, was I meant to do this?

Yes.
Thank you for reporting back.

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07 Dec 2019 04:48 #152214 by little_sparky


Think I spoke too soon. I still get the message, nowhere near as often though. However I would like to completely get rid of it because its bearable when routing but when I go to plasma cutting it will be a nightmare.

Do you think this is all coming because I havnt disabled modem and serial (if i have it? cant seeem to find it) or do I need to enter the numbers from my latency somewhere that im missing?
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