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did you found a way to set resolution?

thanks in advacnce

tommylight wrote:

Out of curiosity, how much is a RPI and a good touchscreen these days?
Wondering as i got a Lenovo X1 Carbon Yoga for 120 and a Lenovo Yoga Y370 for 220, bot work for LinuxCNC with Mesa, both have 120Hz touchscreens, very high quality ones, very good keyboards, and both do over 4-6 hours on batteries.

RaspberryPi was $50 locally, the touchscreens $80-100ish Canadian pesos from Amazon. So a shade > US$100 for both. I can't vouch for the "good" WRT reliability the resolution/sharpness is decent not ipad quality but quite acceptable for a CNC machine.

@rodw Can you confirm that it's the same with the Raspberry or is that kernel source already patched?

I noticed that the patch only works when VMCORE_INFO=y which gets selected by:
 - CRASH_DUMP [=y] && ARCH_SUPPORTS_CRASH_DUMP [=y] && KEXEC_CORE [=y] 
 - PROC_KCORE [=y] && PROC_FS [=y] && MMU [=y]

Is really necessary for LinuxCNC to check that /sys/kernel/realtime or will checking for "PREEMPT_RT" in uname -v be enough?

No idea if there is a driver for I2C in LinuxCNC, maybe searching on github project page would show if there is anything about it there.

I'm not sure about axis, but I think it's compatible with most resolutions, but if you're able to find a 1920x1080 display you'll have more choice of user interfaces. For a smoother experience a Raspberry Pi 5 is a better choice.

I'm looking for a suitable small 7-10" touchscreen display for use with LinuxCNC (lor a lathe). I plan to uses a RaspberryPI 4 that has a HDMI interface. The display will be positioned so that my eyes will be quite close ~12" from the display.

This one is cheap enough not sure if 1024x600 is compatible with axis?
www.amazon.ca/gp/product/B0CPM15T7H/ref=...o00_s00?ie=UTF8&th=1

or this one; 1920x1200

www.amazon.ca/Wstirhy-Portable-Kickstand...y%2Caps%2C160&sr=8-9


I have read there are some compatibility issues with some displays, so if anyone can recommend a display that is known to work well, please share the details.

Thanks

I see there are previous threads about this, but things change with time and releases, so better to ask then chase my tail.

I previously setup LinuxCNC - Axis on a desktop PC for my mill, works great now I want to do the same for my lathe using a RaspberryPi4 Model B (4GB RAM, 32GB SD)

How do I go about this?  Some form of instructions would be very helpful.
Link to whatever version I should use?
Does the install prompt what type of machine this will be used (Mill, lathe etc)?
I ordered a A MESA 7i96S, not sure when it will get here.

Any helpful hints are welcome.

Thanks in advance.


 

Hello #MyFirstPostHere,I am trying to attach a BME280 sensor to a Raspberry Pi 4B to monitor environmental variables (temperature, pressure, and humidity). The sensor is connected to the 3.3V, GND, GPIO2, and GPIO3 pins. It works flawlessly when running Raspbian OS (64-bit), and I can retrieve readings via the terminal.However, when trying to use it with LinuxCNC, I encountered multiple errors.Upon checking the I2C buses with the command, I foundand, but I was expecting, as seen in Raspbian OS.I was wondering if there is a solution for this? Is it possible to get this sensor working on LinuxCNC?Please feel free to ask for any additional information.

I was typing up a post to ask for help getting LinuxCNC 2.9.2 running on a Raspberry Pi 4 B attached to a Raspberry Pi 7 inch Touch Display, when I finally figured out the solution. Thought I'd still make the post for helping others or possibly even future me if I have to rebuild this system one day.

The Pi Touch uses DSI for connecting to a Raspberry Pi and seems LinuxCNC doesn't have the required settings enabled in the config.txt by default. Not really a surprise as its probably an unusual pairing of hardware and OS.

The solution was adding the below text to config.txt

What would be the best 3d printer board to use with remora spi and raspberry pi 5 please? For k40 style co2 laser, so I dont need too many motors.

Maybe it's useful info ...
i had to power the RPI5 using a normal 5V/10A DIN power supply. Manage to do it and keep 4.7V at 3.1 A , enough for RPI to avoid detection of an undervoltage condition.
But then I was curios about the official RPI power supply ... and I have tested it with an electronic load: I've got the same voltage ( around 5.14V) from 0.5A up to 5.9 A .. at 6A it shuts itself down nice and safely ).
I think the official power supply is dinamically compensating the cable impedance by increasing the output voltage from the regulator based on measured current .
So if you need 5A , be very careful with the cable or just use the official power  supply , if possible ...
All of these where done with PD disabled ( a small USB-C breakout board with 5.11kohm on CC lines)

Hello, I have been doing some research and I want to understand better the difference on these systems, for instance these setups in the videos use Raspberry pi 4 and Ethercat so he can directly talk to the servos and no mesa card is needed, I understand Ethercat makes wiring much more simple and the cabinet has less parts,also on some servos is possible to do homing directly, some cons seem that is  harder to implement because there is less info out there and hardware is possibly more expensive usually, but my question is to know if it is as powerful as a mesa card setup on the max step rate side of things? any other toughts I may be missing?

 


Thanks!
 

royka wrote:

The SPI driver has nothing to do with Armbian, it's in the kernel, it seems to be a known issue with the default (example) driver. Unless their is a proper SPI driver for the rk3399 it won't be different on that sbc. AFAIK there's only made a realtime driver for the RPI.
Unfortunately I don't have a spi board to test with, perhaps it helps to pin the irq of spi to an isolated core?

I've seen that there has been a rt patch for one board for a quite old kernel, I can try to find that one and if I'm able to apply that on the newer kernel.
 

Is there really a real-time kernel version for the rk3399, like the one for Raspberry Pi? Because I haven't been able to find anything about it.Also, if you manage to find something useful with the older kernel, I’d really appreciate it if you could let me know. Thanks

Thank guys, I'm starting to get a few of the blanks filled in. I now have a few more questions:

I read this (quickly)... linuxcnc.org/docs/html/lathe/lathe-user.html
I also watched this video on G76 thread cutting...

Links to other applicable documentation or instructional videos (specific to LinuxCNC lathe operation are welcome.

Now the follow-up questions:
1)  I don't see a problem using the G76 method in the video above except, I'm a hobby guy so it can be months between thread cutting sessions so with my present memory I would pretty much have to watch that video to refamiliarize myself with the various parameters before I could setup for a thread cut. Is there any sort of thread cutting wizard like GUI thing associated with Axis that simply lets you select the thread type for example 3/8-16, starting here, and ending there that then figures out the arguments required for G76?

2) Presently I have a derivative of the Clough42 ELS on my lathe and it uses a Omron 600 pulse/rev quadrature encoder. Assuming I use a MESA 7i96s to get that quadrature encoder signal into LinuxCNC, will the 600 pulse/rev encoder be fine (ie. not overwhelm Linux with too many pulses if operating at say 2000RPM)?

3) Looks like I will need a one pulse per rev sensor on the spindle correct? The Omron encoder I'm using has a Z output, so I will use that I guess.

4) Regarding the 7i96S, eventually I would like to use one or possibly two MPG style encoders to replicate the hand wheels for X and Z, it seems like I will have enough unused pins on the 7i96S, not sure if those inputs can be used for the MPG inputs and what would be involved in decoding the MPG inputs, possibly some logic in the HAL file? 

5) Not sure if I should get a 7i73 for the MPG(s), prefer to keep the hardware to a minimum if I can get away without the 7i73, comments?

6) Regarding X-axis servo. I measured with a peak torque sensor the required torque to do an aggressive cut with a dull HSS tool and peak torque was only 0.5Nm so I'm leaning towards a fairly small servo in the 1Nm range. Do you think this is too small?

7) Last question where can I find appropriate install LinuxCNC install file? I want to see if I can get it running on my RaspberryPi

Much appreciated

 

Ich komm leider auch damit nicht weiter, bei usr/bin/env kommt Verzeichnis nicht gefunden, wenn ich das env wegmache kommt permission denied. 

Ich hab zwei System, richtig arbeiten tut LinuxCNC 2.81, auf einem Raspberry Pi zum Testen hab ich auch 2.93 auf einem zweiten RPI installiert, die Fehler oben kommen vom dem 2.93 System, auf 2.81 passiert garnichts, vermutlich wegen alter Python Version.

Kann es auch ein grundsätzliches Problem an der RPI Installation sein?

Danke
Grüsse
Steffen