Raspberry Pi CNC Controller
ฝัง
- เผยแพร่เมื่อ 24 พ.ย. 2020
- ============== Description ==============
Creating a DIY CNC controller with Linux CNC using a Raspberry Pi.
Links:
Linux Preempt-RT kernel:
lemariva.com/blog/2019/09/ras...
Raspberry Demo Hal File:
github.com/LinuxCNC/linuxcnc/...
RPI Logic Level Shifter:
github.com/ChrisWag91/rpi_lev...
PI-LCNC Board:
github.com/ChrisWag91/PI-LCNC
CORRECTION:
There now is a ready to use OS image with LCNC already preinstalled available:
linuxcnc.org/iso/
And there is also a deb package for LCNC:
www.linuxcnc.org/dists/buster/...
============= Further Questions ==============
Feel free to leave a comment.
============== Soundtrack =============
Music:
"Sommarfågel" by Wintergatan
"Music Machine Mondays Theme Song" by Wintergatan
"Sandviken Stradivarius" by Wintergatan
These Tracks can be downloaded for free at www.wintergatan.net
Free License to use the Tracks in your video can be downloaded at www.wintergatan.net - วิทยาศาสตร์และเทคโนโลยี
Thank you Chris. I came across the video and it was well put together giving me a great start. I got my pi ready for some testing. Hopefully it will work for me as a fumble along.
As someone who has built many CNC machines (some on my channel) and as someone starting to program and use the Raspberry Pi... I am SERIOUSLY IMPRESSED with what you have accomplished! Excellent video and I will be sure to share!
Raspberry pi ile sadece cnc routuer mı yapılabilir başka projelerde kullanılabilinirmi
@@yasinklc2699Raspberry Pi, birden fazla çıkışı olan mükemmel bir küçük bilgisayardır. Pek çok şey yapmak için kullanılabilir. Sensörleri ölçmek, bir şeyleri kontrol etmek, bir robot yapmak veya başka birçok kullanım istiyorsanız... bunu oldukça iyi yapacaktır.
Wow, great build. I'm working on almost the same project.....!!!
Thanks for posting your HAL file, that's always painful to construct.
Amazing! The first time I heard you ask “how hard can it be?”, I thought that nature would be readying a can of whoop-arse, but then I heard you ask it a second time, tempting fate. Yet you carried it off extremely elegantly.
I take my hat off to you sir!
Super work.!
I especially like very much that you open source your findings.
Thx Form a long time lcnc user.
Excellent work and thanks for sharing - really useful stuff. I expected you to sound a bit happier at the end having achieved all that though! 😉
Thank you for a great video(stumbled upon it accidentally-glad I did). I am looking to do something similar and your video is just what I was looking for. Great job. I am confident I will have questions, so I will be reaching out to you.
UI fix is hard but use "glade-3" (not just glade).
My screen is vertical.
Anyways, you deserve an upvote.
Useful stuff!
Thanks for taking time posting this!
Fantastic effort.
Many, many huge thanks for lighting the way in the wilderness. 👃😁
Very helpful. In particular the video actually has a diagram showing the parts connected, and an explanation of what they are for. To be honest, explaining the function of a breakout board would have been even better, but still this is much better than the usual how-tos. As a former software architect, I'm struck at how uncommon it is to get an explanation of the overall architecture of a system (software or hardware).
I'm probably going to build your two boards, as you seem to be out of stock.
Very good👍🏻 i think about to use your with the open cnc shield 👍🏻
Thank you so much!
Thanks , nice work
Amazing!!!!!!!!
Hi Chris, thanks for the great video and PCB designs seems like a nice design. I would like to give this a try as well also like the idea with the small touch screen. Did you publish the Gmoccapy screen resolution changes somewhere (a linuxcnc fork maybe)?
Not yet, since it is not really a clean mod at the moment. But I'll pull the files from my machine on the weekend, if you want to give them a shot anyway. Watch this space for a download link.
Thanks. I will give it a try then.
The files are now available on Github.
github.com/ChrisWag91/PI-LCNC/tree/master/Gmoccapy%20mod%20files/small%20screen%20mod%201024x600
But they might need a little bit of polishing.
cheers
The files are now available on Github.
github.com/ChrisWag91/PI-LCNC/tree/master/Gmoccapy%20mod%20files/small%20screen%20mod%201024x600
But they might need a little bit of polishing.
cheers
Nice job Chris! Do you have any concerns on the longevity of the micro SD card in the RPi?
Thanks. I haven't had any issues with the sd card so far. I guess using smaller capacity cards from a name brand manufacturer will reduce that risk.
Hi @Chritoph. One question: how feasible and easy do you think would be to adapt this set up to a 4-axis CNC? any Docs you can point out? Thanks.
LinuxCNC supports up to 9 axes, so 4 is just a few tweaks to the INI file.
Thanks Chris! I was wondering if you had the stl file for the raspberry pi and bob mount you drew?
github.com/ChrisWag91/PI-LCNC/tree/master/CAD
I actually went with an RPi4 with the Mesa 7C81. It works like a champ. Documentation sucked at the time, but maybe it's getting better now that this stuff is in the stable release of LinuxCNC? I just wish there was more friendly tutorials for the HDL for LinuxCNC. Looking at the manpages as a newbie is a nightmare in my experience, but there seems to be so much stuff in there that has a lot of potential.
Hi. So you used a CNC (parallel port) breakout board + Mesa 7C81 + RPi4? Do you have a link that can assist me with this configuration? I'm new to this and it would really help.
@@Grace-ky5du I don't have any public links, I'm sorry. Thankfully it's a bit easier to get started now since LCNC has an official RPi image on their website but you will still have to make your own HAL config. You should read up on the documentation to see how you can stress test the pi using the latency tester if you didn't already know and determine what servo thread speed you will use (this is explained in the docs thankfully). I personally used the PNCconf tool to make a default mesa machine configuration. The Mesa 7c81 wasn't available in the tool though at the time (maybe they have updated it?), so I just selected another typical Mesa card and set it to be connected to my 7i76. I had to go into the generated .ini file and the HAL file and change them to properly call my 7C81 instead. From there, it was just like other typical LCNC machine configs.
Do you think RB Pi4 with Linuxcnc will work with Mesa card 7i76E (communication RB Pi 7i76E is via ethernet cable)?
Did you run a latency test? If yes what is the outcome?
I wander, what's the latency and jitter? As the first error message you got after starting LinuxCNC was that of too much latency. I'm really interested as to how did you solve that problem.
System latency is 81 ns on my system according to this method: metebalci.com/blog/latency-of-raspberry-pi-4-on-standard-and-real-time-linux-4.19-kernel/
The LinuxCNC latency test gives me a max jitter around 50000 ns which is not great but allows for 15kHz step rate. Since my machine can mechanically handle about 3kHz max it is consistent enough for my use case.
But it would be great to get the jitter down further. Would be interesting to see if newer releases of the rt kernel and LCNC can improve that situation significantly.
@@ChristophWagnerChrisDesign Thanks a lot! Now I can put my rpi4 to a good use. ;)
Hello, Thanks for the great video!
What is the advantage of using your interface + Breakout boards over the raspberry protoneer board?
Thanks
Hey,
I don't have any experience with that board. I'm not sure if you can get that to work with LinuxCNC though.
@@ChristophWagnerChrisDesign So far have you been happy with this choice of controller or you are thinking about going to a more industrial solution like Unicorn or Mach4 . Do you have some thought about the DDCS all in one chinese controller?
Thanks
Usa a mesma versão do Linuxcnc para desktop ou é uma versão específica?
Good
Just for reference, but there is actually a mesa card specifically designed to work with the rpi, just for anyone wondering.
Which one? I bought a 7i96 for a project, will it work?
Not sure if you would know this or not but I have a small sainsmart cnc clone that runs GRBL, is it possible to use LinuxCNC on a raspberry pi to control it through the mini USB port in the same way I use octoprint on a Ubuntu PC to control my two 3d printers?
Theoretically yes, but I'm not sure if you can get Linux CNC to talk to these boards.
Nice music
Thank you for the excellent video. Would it be possible to get a copy of your .stepconf file? Thanks in advance.
I have a Shapeoko 4 axis machine with stepper motors, y axis uses 2 together. The machine has its own stepper controller. This can interface with a Raspberry Pi but at the moment only works with Carbide Motion software (via a USB cable and uses GRBL commands), this software doesn't support the use of the Pi GPIO. I want to run the machine via an external input and also want to switch on 1 or 2 outputs using M codes. I will add a relay interface module to switch the outputs. Will Linux CNC run this machine from the Pi?
thank you chris. i have a question. I want to make my own cnc. can i use the hardwares you used in my software? i dont want to use such as linuxcnc or grbl converter? can i send the gcodes to machine line by line using this hardware? (using socket module or pyserial)
No that would not work since there is basically no logic on the boards I designed. Linux cnc is required to interpret the the gcode and "converts" it to pulses for the steppers.
@@ChristophWagnerChrisDesign bro, i want to my own cnc machines. But i don't want use any converter. What should i do, if i buy a controller compatible with mach3 (with raspberry pi) and can i send gcode to controller over serial or socket ? pls share your opinion with me.
@ You could look into arduino based gcode interpreters. Maybe you could even use a controller board for a 3d Printer. Also check the mesa FPGA boards, but Im not sure if they are interpreting gcode onboard.
@@ChristophWagnerChrisDesign bro, i have gcode and if i calculate the needed pulse for 1 mm to go to linear move, is it correct ? and with this can i send the pulse to motor using serial ? is it sensible ?
@ Thats pretty much what Linux CNC is doing. So theoretically it should be possible, but I'm not sure if you get tight enough timing with a python loop and pyserial. You will need to make sure that your system is realtime capable which is way over my head.
I first would like to say I love this project. Second when i am trying to use the linuxcnc-2.8.0-Pi4 zip i keep on a Pi4B 2GB i keep getting a startup error: 0.788381 kvm [1]: Error, CPU 0 not supported! and then then when it finally loads into the desktop the mouse and keyboard do not work. Any suggestions? Thanks
Great video, but what is the purpose of the touchscreen???
hey nice job! I have had similar thoughts about my router. Its currently running linux on an old desktop machine but its super bulky and overkill for what it needs to do. How are you finding the performance of the pi?
Hi, thanks mate. Performance is plenty good enough for a cnc controller. It is way better than with my old desktop pc. But I would recommend at least the 4gb variant.
Are the lpt board (upper level shifter) is your product?whats about the schematic for this?
Yes I did design the board.
But you would not need it, because it just links the traces straight through to the lpt connector. So you could just splice the lpt wire which comes with the breakout board, directly into the level shifter and supply the pi with an external power supply.
If you still want to use that board I might be able to send you one of my spare ones for the cost of parts and shipping. Just let me know if you are interested in that.
I did not open source the design since I did not fully test the characteristics of the power supply. But it seems to work nicely in this use case.
@@ChristophWagnerChrisDesign thanks for repply... I will try it...
Since Ncov-19 hard to get shipping to my town
Have patreon?
Kannst du sagen, was die maximale Frequenz ist, die du damit ausgeben kannst? Ich würde gerne wissen, ob das auch für meine Maschine ausreichend ist.
English: What is the may. frequency you can drive? I want to check if it fits also for my machine.
ok, habs selbst auf deiner Github-Seite gefunden: 15000 Steps / s
OPEN SOURCE = LIFE
THANKS@
The level shifter board is in your github but the PI-LCNC is not. Are you planning on making that available too?
I might do that at some point if there is enough demand. But that would require some more testing.
But you would not need it, because it just links the traces straight through to the lpt connector. So you could just splice the lpt wire which comes with the breakout board, directly into the level shifter and supply the pi with an external power supply.
If you still want to use that board I might be able to send you one of my spare ones for the cost of parts and shipping. Just let me know if you are interested in that.
@@ChristophWagnerChrisDesign Would be cool, I would be interested! If it's working for your machine is good enough to make it public!
@@IvanGreguricOrtolan github.com/ChrisWag91/PI-LCNC
Hi Chris, I am looking to control a self-build machine, I would like to know where we need to modify the pinout file for the motor (11:08) from the linux CNC. I just to add a few more degree of freedom 7 axis. Could you share your files?
you can find my hal file here: github.com/ChrisWag91/PI-LCNC/tree/master/Linux%20CNC%20mod%20files
@@ChristophWagnerChrisDesign Hi christ Thanks. Just a quick question since I am new to linuxcnc. Is it multithreading by default for the multi-axes control? or I have to start a new thread for each axis individually?
Sorry to bother you Chris. Great video, I got the shifter and the LCNC but am having an issue getting it to work together. I used your pi image, when I choose a configuration and setup the proper pinouts and everything the steppers do not move. I feel like an idiot lol. Do you have any ideas what I could be doing wrong?
Did you try one of the preconfigured samples found on the desktop without changing anything in advance?
raw.githubusercontent.com/ChrisWag91/PI-LCNC/master/Graphics/F013_PI-LCNC_RPI_Image.png
They should work out of the box (at least the steppers should be running). If that is the case, I would tweak the config files to fit your machine. You can contact me via mail, if you need further support: christoph.wagner91@gmail.com
great project kudos.
I wonder if it is possible and how to turn the function on the limit switches? if the switch is in position 0 in halshow it shows 1 and if I press it it shows 0
I solved the problem with relay and com and nc contact 😂
They have a mesa raspberrypi hat now for things like this
LPT RPI board schematic?
"Connector_dsub: DSUB25_Female" at 8:21 min.
You really don’t need Raspberry pi specific Mesa hardware. Using the iso you linked, and a 7i96 card it’s basically plug and play. The gpio pins are limited in their ability to generate pulses of high frequency so you’ll just be limited on your feed rates (as I understand it).
Thanks for the feedback. Yes, there is an upper limit in the frequency of the gipios, but at least in my case that is way more than my machine can handle mechanically. So going with a mesa card would not have a benefit in that regard and the solution using gpio pins should be quite a bit cheaper still. In my opinion there is something to be said for both solutions.
Hello Christ, I am a software engineering student at a college in the US. I have project due this semester that needs a PCB kit. Specifically, the PI LCNC board. What is the best way to contact you to order a kit?
Chris*
Hello Chris . Can you plz tell me how to set tool changing in mach3 bob need help Thanks
Did you consider buying USB to LTP cable?
Can the same thing be done with LattaPanda Alpha
The installation of Raspbery Pi OS with Linuxcnc 2.8.0 can be done more easily by downloading the full LinuxCNC image directly from here:
linuxcnc.org/downloads/.
if you want to try the 64-bit version, you can look here:
forum.linuxcnc.org/9-installing-linuxcnc/39779-rpi4-raspbian-64-bit-linuxcnc?start=10#181585
thx chris is a great job you did . mine project is les compicated . i just need one single x-axe to be controled with a stepper motor .Can i use the pins of the pi 4 use directly (one transistor inbetween for the 3.3 to 5v adustment) and use partli your hal file just to activate 2 pins for puls and direction like
loadrt [EMCMOT]EMCMOT base_period_nsec=[EMCMOT]BASE_PERIOD servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[KINS]JOINTS
loadrt charge_pump
loadrt hal_pi_gpio dir=78855 exclude=32918520
loadrt stepgen step_type=0,0,0
# --- begin addf s
addf hal_pi_gpio.read base-thread
addf stepgen.make-pulses base-thread
addf stepgen.capture-position servo-thread
addf motion-command-handler servo-thread
addf motion-controller servo-thread
addf stepgen.update-freq servo-thread
addf hal_pi_gpio.write base-thread
# --- end addf s
net xstep stepgen.0.step => hal_pi_gpio.pin-03-out
net xdir stepgen.0.dir => hal_pi_gpio.pin-05-out
Sure, that should work just fine. But I'm not sure if linux cnc will run with your simplified hal file. That will depend on your initial configuration. If you run into issues you could use a standard 3 axis configuration with my configuration files and just use one of the axis.
Very cool project . How can I get in contact with you ?
you can contact me via mail: christoph.wagner91@gmail.com
Can you use linuxcnc on numvee controler
Hey Gibt es das Video auch auf deutsch ?
I have problem with Touch Screen not working, spended couple hours trying to fix it seems like i cant find solution, did u have problem with that?
Tnx
Raspberry with 2/4 or 8 GB?
how can I reflash the raspberry
please someone help me, but if there is any raspberry pi 4 lnux cnc os ready tell me about it
can we run mach3 ?
Hi, I am trying to do something similar. Could you please give me your hall file?
You can find the files here: github.com/ChrisWag91/PI-LCNC/tree/master/Linux%20CNC%20mod%20files
@@ChristophWagnerChrisDesign Thanks!
hi Christoph I have send you email and also message in your shop but i haven't got any response ...
interesting but not understand anythink. i have raspberry pi zero,3 and 4 but newer not can add image in boards, i have one old mini computer whit sd card and in have emc2. but hardware not have ready. no have tube at frame can welding all. thailand have problematic build anythink, no found material no have help, not anythink. north europe u build 8 cnc machine wery easy all parts can buy local store or orden internet, thailand not can anythink.
Pi3 is not good. I have one and latency is around 100Kns.
According to linuxcnc doc, it is not good.
Should be ideally below 10k…
so yeah, this seemed like a great idea... then I watched the video and realized that I am nowhere near smart enough. *Awkward face* why must i alwayd do things the hard way.
need use FPGA card, uh, super expensive ower 200$ linux cnc and old paraller printer port computer what can buy 20$ and linux cnc FREE need controller card cost 10$ and then drivers ewery stepper cost 40$/motor. lot cheapen than raspi. uh.
A Debian package of LinuxCNC is now available. tracker.debian.org/pkg/linuxcnc
hi, can youz show the plan of wiring this all things together without 3v converter - i mean direktly to raspberry ?
It would be epic!