Search Results (Searched for: raspberry)
18 Mar 2024 00:44
Replied by cornholio on topic userid / password for live
userid / password for live
Category: Installing LinuxCNC
17 Mar 2024 22:17 - 17 Mar 2024 22:26
Communication solution on my own CNC Machine was created by srknyxl
Communication solution on my own CNC Machine
Category: General LinuxCNC Questions
This is my first post and first topic in this forum (the first forum I've joined other than my native language). Thanks to you, I learned a lot about linuxcnc and different topics. Finally, I registered to gather my thoughts and open a topic. Since I used translation while writing the article, there may be some problems. Please excuse me 
I have been doing research on making a CNC machine for a long time. I have met many alternatives on the software side. Driving stepper motors with simple grbl software, slightly more advanced NC solvers such as fluidnc, ready-made control units, windows-based mach and finally linuxcnc.
Mechanically speaking, I have the following design in mind:
A router with a fixed bridge and a processing area of 60x40cm. This machine should be able to cut aluminum very easily. I am thinking of using epoxy granite casting and aluminum sheets for the body material.
Where I work now, there is a large machining center, lathe, 4kw fiber laser and twisting machine. These are all CNC and I know how to use them. I have the opportunity to use all of them for the weekends. Using these opportunities, I want to make permanent magnet ac servo motors myself, in addition to the body parts. Even though the power density in terms of volume is not as much as industrial servos, I think it can be a good start. I will laser cut the thin transformer sheets and bring them together to form the stator. Then I will do the copper winding. I will machine the rotor and body with CNC lathe and milling machine and place the magnets. There are many mechanical details.
I want to use odrive as Servo Motor driver. I will design the voltage and current of the motor I will build in accordance with this driver.
The Odrive project is a closed loop servo controller in itself. Although servo examples are generally made with low-power drone motors, it has a power potential much higher than what I need, such as 56v-70a 4kw. It is used in many applications for location applications. I can't see any physical impediment to it not being used on a medium sized CNC project.
Now it's time for the questions that come to my mind.
Odrive manages the motor and encoder connections itself. Since the pid cycle ends within the odirve itself, would it be enough to just give it pulse and direction commands? In this scenario, linuxcnc will know the current location from the signals it sends. If there is no error signal from the driver, where it thinks it is will be correct. I don't think I need the "mesa" card for this setup.
Can I use Raspberry Pi's own IO outputs without a MESA card? Or is it possible to use a current PC without a parallel output as a Linuxcnc PC and send commands to a Raspberry Pi via ethernet? Raspberry Pi will drive the io pins with commands from Ethernet. Just like a mesa with an ethernet interface. Is this possible? If we can send packets to an IP address from "linuxcnc" using the ethernet port, there is no reason not to make our own ethernet "mesa" card. For this purpose, cheap alternatives can be used instead of expensive raspberry.
www.crocuspi.com/zero_en.html
The software running on these cards connected to the Ethernet network will only convert incoming data packets into orders to be sent to the io pins. The Linux card with 64MB RAM in the link can do this job very quickly.
If it is possible to communicate with the TCP protocol over Ethernet, I would like to get one of these cheap cards and start working on this subject.
I have been doing research on making a CNC machine for a long time. I have met many alternatives on the software side. Driving stepper motors with simple grbl software, slightly more advanced NC solvers such as fluidnc, ready-made control units, windows-based mach and finally linuxcnc.
Mechanically speaking, I have the following design in mind:
A router with a fixed bridge and a processing area of 60x40cm. This machine should be able to cut aluminum very easily. I am thinking of using epoxy granite casting and aluminum sheets for the body material.
Where I work now, there is a large machining center, lathe, 4kw fiber laser and twisting machine. These are all CNC and I know how to use them. I have the opportunity to use all of them for the weekends. Using these opportunities, I want to make permanent magnet ac servo motors myself, in addition to the body parts. Even though the power density in terms of volume is not as much as industrial servos, I think it can be a good start. I will laser cut the thin transformer sheets and bring them together to form the stator. Then I will do the copper winding. I will machine the rotor and body with CNC lathe and milling machine and place the magnets. There are many mechanical details.
I want to use odrive as Servo Motor driver. I will design the voltage and current of the motor I will build in accordance with this driver.
The Odrive project is a closed loop servo controller in itself. Although servo examples are generally made with low-power drone motors, it has a power potential much higher than what I need, such as 56v-70a 4kw. It is used in many applications for location applications. I can't see any physical impediment to it not being used on a medium sized CNC project.
Now it's time for the questions that come to my mind.
Odrive manages the motor and encoder connections itself. Since the pid cycle ends within the odirve itself, would it be enough to just give it pulse and direction commands? In this scenario, linuxcnc will know the current location from the signals it sends. If there is no error signal from the driver, where it thinks it is will be correct. I don't think I need the "mesa" card for this setup.
Can I use Raspberry Pi's own IO outputs without a MESA card? Or is it possible to use a current PC without a parallel output as a Linuxcnc PC and send commands to a Raspberry Pi via ethernet? Raspberry Pi will drive the io pins with commands from Ethernet. Just like a mesa with an ethernet interface. Is this possible? If we can send packets to an IP address from "linuxcnc" using the ethernet port, there is no reason not to make our own ethernet "mesa" card. For this purpose, cheap alternatives can be used instead of expensive raspberry.
www.crocuspi.com/zero_en.html
The software running on these cards connected to the Ethernet network will only convert incoming data packets into orders to be sent to the io pins. The Linux card with 64MB RAM in the link can do this job very quickly.
If it is possible to communicate with the TCP protocol over Ethernet, I would like to get one of these cheap cards and start working on this subject.
16 Mar 2024 14:36
16 Mar 2024 11:17
Replied by cornholio on topic EtherCAT on Raspberry Pi 5
EtherCAT on Raspberry Pi 5
Category: EtherCAT
16 Mar 2024 10:26
Replied by andypugh on topic EtherCAT on Raspberry Pi 5
EtherCAT on Raspberry Pi 5
Category: EtherCAT
14 Mar 2024 23:53
Replied by zmrdko on topic LinuxCNC on Raspberry Pi 5
LinuxCNC on Raspberry Pi 5
Category: Installing LinuxCNC
14 Mar 2024 20:11
Replied by rodw on topic LinuxCNC on Raspberry Pi 5
LinuxCNC on Raspberry Pi 5
Category: Installing LinuxCNC
14 Mar 2024 14:34
Replied by elovalvo on topic LinuxCNC on Raspberry Pi 5
LinuxCNC on Raspberry Pi 5
Category: Installing LinuxCNC
14 Mar 2024 08:51
14 Mar 2024 01:50
Replied by cornholio on topic LinuxCNC on Raspberry Pi 5
LinuxCNC on Raspberry Pi 5
Category: Installing LinuxCNC
13 Mar 2024 21:02
12 Mar 2024 22:19
Replied by rodw on topic LinuxCNC on Raspberry Pi 5
LinuxCNC on Raspberry Pi 5
Category: Installing LinuxCNC
12 Mar 2024 19:47
Replied by elovalvo on topic LinuxCNC on Raspberry Pi 5
LinuxCNC on Raspberry Pi 5
Category: Installing LinuxCNC
I recently noticed that the Raspbian update on Pi5 installs version 6.6.20+rpt-rpi-2712.
Therefore I thought about updating the PREEMPT_RT version
So I started with a fresh installation of the Raspberry Pi OS 64 bit via Raspberry Pi Imager.
I updated to version 6.6.20 with the usual commands:
sudo apt update
sudo apt upgrade
and I rebooted.
The uname -a command now returns the following indication
Linux raspberrypi5 6.6.20+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.6.20-1+rpt1 (2024-03-07) aarch64 GNU/
I then compiled a new version of the Raspbian OS that included the PREEMPT_RT
For convenience I used the procedure here
forums.raspberrypi.com/viewtopic.php?t=343387
The kernel with the PREEMPT_RT is kernel-6.6.21-v8-16k-elv.zip
and can be downloaded from here
drive.google.com/file/d/1FKLQIBdXTh43kjC...48d/view?usp=sharing
To install it, just copy it to /tmp and then run these commands
cd /
sudo unzip /tmp/kernel-6.6.21-v8-16k-elv.zip
overwriting all files with the All option
So I edited the cmdline.txt with
sudo nano "/boot/firmware/cmdline.txt"
adding the following commands to the end of the line
isolcpus=2.3 rcu_nocbs=2.3 nohz_full=2.3 max.processor.cstate=1
At the next reboot the uname -a command reports the following indication
Linux raspberrypi5 6.6.21-rpi999-rpi-2712 #1 SMP PREEMPT_RT Tue Mar 12 15:59:56 CET 2024 aarch64 GNU/Linux
To install linuxcnc simply type the following commands
sudo apt update
sudo apt install linuxcnc-uspace linuxcnc-uspace-dev
However, to date the installed version is the following
LINUXCNC - 2.9.0~pre1+git20230208.f1270d6ed7
If you want version 2.9.2 you can do it this way:
cd /tmp
wget linuxcnc.org/dists/bookworm/2.9-uspace/b...pace_2.9.2_arm64.deb
wget linuxcnc.org/dists/bookworm/2.9-uspace/b...-dev_2.9.2_arm64.deb
wget linuxcnc.org/dists/bookworm/2.9-uspace/b...doc-en_2.9.2_all.deb
sudo apt install ./linuxcnc-uspace_2.9.2_arm64.deb
sudo apt install ./linuxcnc-uspace-dev_2.9.2_arm64.deb
sudo apt install ./linuxcnc-doc-en_2.9.2_all.deb
The result of the latency-histogram (latency-histogram --nobase --sbinsize 1000 --show --servo 35000) is however always very interesting
For those who do not want to retrace all the steps previously exposed, you can find the ready-made image (Lcnc292_pi5.img) here:
drive.google.com/file/d/1dd8oiYhcs_UComc...fNF/view?usp=sharing
Therefore I thought about updating the PREEMPT_RT version
So I started with a fresh installation of the Raspberry Pi OS 64 bit via Raspberry Pi Imager.
I updated to version 6.6.20 with the usual commands:
sudo apt update
sudo apt upgrade
and I rebooted.
The uname -a command now returns the following indication
Linux raspberrypi5 6.6.20+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.6.20-1+rpt1 (2024-03-07) aarch64 GNU/
I then compiled a new version of the Raspbian OS that included the PREEMPT_RT
For convenience I used the procedure here
forums.raspberrypi.com/viewtopic.php?t=343387
The kernel with the PREEMPT_RT is kernel-6.6.21-v8-16k-elv.zip
and can be downloaded from here
drive.google.com/file/d/1FKLQIBdXTh43kjC...48d/view?usp=sharing
To install it, just copy it to /tmp and then run these commands
cd /
sudo unzip /tmp/kernel-6.6.21-v8-16k-elv.zip
overwriting all files with the All option
So I edited the cmdline.txt with
sudo nano "/boot/firmware/cmdline.txt"
adding the following commands to the end of the line
isolcpus=2.3 rcu_nocbs=2.3 nohz_full=2.3 max.processor.cstate=1
At the next reboot the uname -a command reports the following indication
Linux raspberrypi5 6.6.21-rpi999-rpi-2712 #1 SMP PREEMPT_RT Tue Mar 12 15:59:56 CET 2024 aarch64 GNU/Linux
To install linuxcnc simply type the following commands
sudo apt update
sudo apt install linuxcnc-uspace linuxcnc-uspace-dev
However, to date the installed version is the following
LINUXCNC - 2.9.0~pre1+git20230208.f1270d6ed7
If you want version 2.9.2 you can do it this way:
cd /tmp
wget linuxcnc.org/dists/bookworm/2.9-uspace/b...pace_2.9.2_arm64.deb
wget linuxcnc.org/dists/bookworm/2.9-uspace/b...-dev_2.9.2_arm64.deb
wget linuxcnc.org/dists/bookworm/2.9-uspace/b...doc-en_2.9.2_all.deb
sudo apt install ./linuxcnc-uspace_2.9.2_arm64.deb
sudo apt install ./linuxcnc-uspace-dev_2.9.2_arm64.deb
sudo apt install ./linuxcnc-doc-en_2.9.2_all.deb
The result of the latency-histogram (latency-histogram --nobase --sbinsize 1000 --show --servo 35000) is however always very interesting
For those who do not want to retrace all the steps previously exposed, you can find the ready-made image (Lcnc292_pi5.img) here:
drive.google.com/file/d/1dd8oiYhcs_UComc...fNF/view?usp=sharing
12 Mar 2024 06:59 - 12 Mar 2024 19:50
Replied by elovalvo on topic Linux CNC Pi Display port support?
Linux CNC Pi Display port support?
Category: Computers and OS's
12 Mar 2024 01:35
Replied by cornholio on topic Linux CNC Pi Display port support?
Linux CNC Pi Display port support?
Category: Computers and OS's
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