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Hi,

I try to install the latest version of LinuxCNC on Debian Bookworm using the 'Debian 12 bookworm PREEMPT-MT ISO' from the web site. (LinuxCNC=2.9.3, linux image-rt. Build 2024-07-21 21:05:42, live build 20230502)

I have the ISO on an USB drive and can boot from it. Running live (amd64) is without any problems, I can run LinuxCNC and its test tools for latency testing.
Max jitter on servo thread/base thread is around 10000/20000. I should be able to use LinuxCNC on this machine (I think).

When I boot and select 'start installer' I run into problems.
During the boot, before entering the graphics screen I see lines like
moud: mounting /dev/sda on /media failed: Invalid argument
umout: can't unmount /media: Invalid argument.

Other devices that I see are /dev/sda1, /dev/sda2 and /dev/sda5 before the graphics screen removes is all and takes over the screen.

In the past I was able to install Debian 10 on this machine (still on it but can't use it at the moment), I don't think it is a hardware problem.

I tried several USB slots to see if it makes any difference, but all fails.

Does anybody have a suggestion how to fix this?

Kind regards

Yes, they do! As do VFD's. 

tommylight wrote:

Mesa 7i96S can do 10 axis just by adding a simple BOB (it can do without BOB, but wiring must be careful).
If you do not need much input/output pins, go for that one, later you can add whatever you might need, like 7i85S or 7i84 or even analog servo drives with 7i83.
 

Hi..thanks for reply....I am not really clear about exactly I will need so this looks like a good start that sets up for anything in future..some of what is foggy at this time is the difference between mach 3 and lcnc...obviously 9 axis are available in lcnc and not mach 3 but also different board is needed to match up  right?...then is BOB an extension of 7i96s? as opposed to mach3 goes to BOB first ,then ESS?...Thanks!!,

Rick

Anyone against deleting this topic?

Plasma makes a lot of noise...
And so do servo drives, but not nearly as much as plasma cutters.

new toy

   

www.amazon.de/dp/B07SSL1G18?psc=1&ref=pp...dt_b_product_details

works like a rotary-encoder, i think it should work in RIO

I thought so but not sure how that maps to A+ and B+

In case anyone needs it, here is the current link to the product:
aliexpress.ru/item/1005007328938566.html

And also attached the archive with documentation I found:
www.gzyanwei.com/upload/Files/2022/11/21/Ecat-IO_V2.zip

This board has one input for the encoder and two inputs for counters. The first input will definitely be occupied by the spindle. Do you think it is possible to use the counter input for the MPG? 

Hi Russell,
you just have to pay attention to the HDMI pins and the 1.8V output on BANK3 (you can use it for 3.3V input)

the capacitors on the HDMI output can be remove, but than, you can not use the HDMI-Port anymore on the TanNano9k board.

if you need more pins, you can use shiftregister's, bud not for Highspeed-Encoder or pwm generation (including dir-pins), the shiftregs are very fast but produce some jitter.

@cornholio
thanks for testing, sounds good

rodw wrote:

CATIO-A
 

Thanks! Looks like I found it.

Odd, it works for me CATIO-A
 

not perfect, but maybe a starting-point for other developer

 

python3 pyvcp-parser.py /usr/share/doc/linuxcnc/examples/sample-configs/apps/pyvcp/pyvcp_demo1.xml

Hey guys awesome work so far, I would like to make a PCB for the Tang Nano 9K to plug into, basically a pin for pin copy of meister's Tango board, but with provision for a few extra bits that I'd like. Mainly provision for closed loop control of brushed DC servos.
My plan is to basically copy and paste the line receiver circuitry of my existing servo drives that I've been using for years and use that for the encoder feedback.
My question is which remaining pins on the Tang Nano are best suited for this task ? If possible I'd like a minimum of 5 axis so thats 10 inputs, 15 if we bring a Z pulse for homing/spindle/threading per axis. I realise there's only so many pins to go around but I'd drop a couple of standard inputs off the board if it meant it would all fit.
Also I'd be happy to post the layout once its finished/working and tested for others to use, but be warned I am going to use through hole parts as much as possible, I am old, have bad eyesight and have found out the hard way that through hole PCB's are more resilient to harsh climates, temperatures/humidity etc than PCB's with tiny surface mount parts.

Cheers.
Russell.

However, best is to send just the coordinates to a servo drive. That saves the pc a huge ammount of
calculation time over 9 scurve axis.

I was under the impression that most of this could be done outside of the realtime thread. The filleting algorithm for example, couldn't that run before actual gcode execution?

rodw wrote:

I think this would be a good I/O module but you would need to create the generic xml which is not hard There may be an xml file here somewhere.

www.aliexpress.com/item/1005004377766525.html 

Could you please write the name and model? There is no product at the link.