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I checked out the latencies:

On LCNC 2.8.4 + Buster:
Servo thread (1ms): Max interval 1024713 ns, Max Jitter 25556 ns
Base thread (25us): Max interval 65792 ns, Max Jitter 40792 ns

On LCNC 2.9.3 + Bookworm
Servo thread (1ms): Max interval 1069862 ns, Max Jitter 69928 ns
Base thread (25us): Max interval 120306 ns, Max Jitter 95306 ns

On LCNC 2.9.3+bookworm, the latencies are indeed more, especially for the base thread where it seems to have almost doubled.
Both machines run the exact same hardware and config. I would like to know more about "tweak some kernel parameters to improve latency to acceptable levels". I'm unfamiliar with that.

I connected the correct index and the machine threads beautifully with no problems when restarting a program or running at higher speed.

I still have another complication with the encoder, though. As it has quite a high resolution for the application (I don't know why they used such a high-resolution encoder and made it even higher with the 3:1 transmission), the pulse frequency maxes out at about 2200 rpm, after which no signal is sent. This of course means that linuxcnc stops feeding motions, since it reads the spindle speed at 0.
The problem would be easily solved if I could tell linuxcnc that beyond, say, 2000 prm of commanded spindle speed, it would switch to reading the speed from the index.

But I am also considering removing the encoder and installing an encoder disk directly on the spindle. The belt does not track too well anyway and makes some extra noise. A couple hundred ppr should be plenty for threading, so I'm not really losing anything by lowering the resolution, right? I doubt I would ever be doing indexing on the machine, as there is no spindle brake and it is driven by a pretty flimsy v-belt.

Hello Benb,

No i'm not using CD-ROM I'm trying to follow PDF steps with internet. Let me know what i'm doing wrong how to correct.

Thank You

Many thanks! I will take it for a spin and compare it to my current workaround.

Thank you for verifying that the install guide works. I tried running it in a VM with a clean LinuxCNC 2.9.3 install from the ISO, it also works fine there. I can do the modification in the VM and then install it on the PC that runs the machine. What would be the best way to do that?

Yeah if Milton came ashore as a cat5 I am pretty sure it would be quite a while before you all would've been hearing
from me. I am just dumb struck at the mess Helene had become and still is.

Очень хочу подключить кнопку начало исполнения программы ,можете помочь?

Hi everyone, 

I have posted before and got a lot of help setting up my CNC machine. 

Now I am working on a hacked/bolt on component for said machine.  I am in desperate need of drilling some very small (.5-.8mm) holes in inconel of high aspect ratio.  I was able to do it with PCB drills but I break more drills then I succeed. So I want to use edm.  I would really appreciate it if anyone who knows about these things could weigh in on the probability of success.

Here is the plan:

I can buy a edm drill head from aliexpress that handles high pressure. I can use a low pressure pump to pump the dielectric through a water filter. Then I can tap the fluid to an airless paint sprayer to pressurize the dielectric fluid to send to the drilling head (the drilling rods are hollow for flushing debris away). I will also tap off from the pump to return to the fluid container (but first it will be directed at the cut as my work piece will not be submerged).  I am ok with replacing filters often. 

All of this was taken from Applied Science YouTube channel. Here is a link: 


What I am doing different from him and am more worried about:

For starters I am using oil as the dielectric.  I am doing this because I already have oil set up for doing traditional machining with. 

The biggest thing I am worried about is the power supply. You can buy these cheap EDM machines form aliexpress that are built for broken tap extraction.  I have a couple of concerns with this. First, is I am not sure if the power supply output power can be reduced low enough to drill very small holes.  I believe it is necessary to lower amperage for smaller holes.  Second, I would not have a feedback to know if the arc has shorted. My thought with this is that I could simply run my feedrate low enough that a short is unlikely to occur. Alternatively, I believe the power supply comes with a drill head on it that does not have through coolant so I would not use it.  However this drill head does have a servo on it and I think that it has feedback to detect a short and it retracts the drill if this occurs.  I could probably workout how to sense when this is ocurring and feed this into my control board. This would require me to modify my LinuxCNC to reverse if a short is detected, but I am sure this could be done? 

Alternatively, I could use the Powercore from RackRobotics.  This power supply seems more versatile and controllable. But I do not think it is shipping at this moment because they are having some troubles with the board. However, I believe that it does have a logic out for short detection. 


I am really hoping I can get something together. I would really love to hear everyones thoughts. I can provide more detail if needed. 

Here are some links to some of the parts I am considering:

www.aliexpress.us/item/3256806213357626....yOTE0OTY1MC4xMy4wLjA. 
 
<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> www.aliexpress.us/item/3256803997349850....ller%7Cquery_from%3A

<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> www.amazon.com/gp/product/B01CFOFZ08

<!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> www.amazon.com/gp/product/B004Z2090U?th=1

Best,
-Dylan 

Всем здравствуйте, пр обрёл токарный станок с linux cnc ,очень понравилось но захотелось мне кнопку внешнюю поставить для запуска программы и вот тут я сдаюсь,нужна помощь в этом вопросе ,я подключил кнопку но вот как привязать пин и какой я не умею пока ,спасите памагите пожалуйста  _222115_023.jpg[/attachment]

Since I am new to the topic of Ethercat, here is another question. I have now installed a servo( As715N) in my test series, but what is it written as in the ethercat-conf.xml 

   <master idx="0" appTimePeriod="1000000" refClockSyncCycles="-1">
    <slave idx="1" type="EK1100"/>
    <slave idx="2" type="EL1008"/>
    <slave idx="3" type="EL2008"/>
     <slave idx="4" type="AS715N"/>

is that right?

 

Danke für die Rückmeldung,

1) Welcher Button? Der 'Manual Log' button kann eigentlich nicht verschwinden.
2) Was meinst du mit ' keine Dateiänderung angegeben'

Perfect, I'm going to try.

Hi Grotius

I try to upload on my github .... honestly first time for me. when done I advice you. real thanks
Yesterday I try to load your old repo .... maybe I forgot somethings ... but nothings ... seems equal or quite equal ..... I read again and again my old ssd without find anythigs .... but I'm tired in these period ...so maybe somethings is looses .... or for sure is looses .... if not all works.

regards

Good advice on the SSR's and the diagram, I'll do that. Also on the note of switching from steppers to servos.... I only have 2 of my motors so far, do you think I'll regret not just starting with servos? its not too late to return at least 1 of them.

The machine already had a bunch of glentek stuff on it, but it was all oldschool analog and I wanted to modernize and I just impulse bought the biggest steppers I could find.

I m stuck - can you give me an sample of config for real time.
i have mesa 7i92TF - Gecko540