How would you design a real time application for cnc control in c / c++ ???

Hi Arciera,

If you do a new project. like this :


This should compile right away. If not.
sudo apt-get install gcc (this is the gcc compiler)

In help->about. Wich QT version does it show?

Tried creating a new project but I just ended up in qt designer "Build" was grayed out. So I compiled an example "Analog Clock" which built without a problem:

More info:

Hi Arciera,

I think it's the compiler. extra info

Your message say's the file is missing. If you follow the link, is the file missing?

$ sudo apt install build-essential

(build essentials are normally also installed with a lcnc rip, to get the ability to compile from source).

And then check this :


Important is, first start a new project (mainwindow project, no clock example) and try to compile this. If this is oke. Then open the Skynet app.

Your message say's the file is missing. If you follow the link, is the file missing?

No, it's actually there:


I have this:




There are lots of Hits on the net about this and most say something along the line "I solved it by removing INCLUDEPATH += /usr/include from .pro file". But sadly I'm out of my depth here.

eu.startpage.com/do/dsearch?query=qt+cre...ch+file+or+directory

Maybe try : $ sudo apt-get install g++
If you don't succeed, no problem. Then will make a stepwise install guide for you !

No, that's not it either.

Hi,

A little update.
Now the gcode is applied to the selected workframe. Multiple workframe's are allowed. Every workframe may contain a different gcode.
The program is now reflecting the (robot tool angles) euler angles to the active workframe.

In the attached video you can see that during the program, the robot can still be moved on the track, and the robot tool angles can be changed.



The video is a little bit fragmented because of the screencast recording + lcnc + skynet app together.
video

@Arciera,

No, that's not it either.
Hmm, I will try to make a skynet iso with qt working, but this will take some time.

Looks good very impressive.
Seems like there were a few times when the kinematic crossed a singular point though (when the arm suddenly changes postures).
The other thing that is still not clear to me is the capability to change between Joint, cartesian world and cartestian tool coordinate mode in the same gcode.
If we only use cartesian modes the arm cannot reach all of its potential work space because the kinematic model will produce infinite solutions when the arm approaches certain postures (ie two joints becoming colinear). To move between such "subspaces" requires the use of joint mode where the inverse kinematic is not used and then we need to be able to switch back to coordinated moves where the kinematic calculates the joints position through the inverse kinematic. What would a gcode program look like if I wanted to use all those different modes and change from one to the other?

Hi Arciera,

For Qt you can download this :
qt_creator_without_bug
I tried it on a fresh grotius iso and it seems to work. I had to install cmake first.

Installing Qt from the online installer is indeed a nightmare at the moment. I hope they solve this soon.
My iso failed because Lcnc pgp key's where not found. I will exclude Lcnc from my iso and try to install it trough script just
like ethercat.

@ update :
I had the same error as you had => stdlib not found. Howto get rid of this message is at the github pre-release page.

My conclusion so far is. From a fresh grotius iso you can run and compile a new project.
If you load the Skynet app, you get the error stdlib not found. Then you have to do a workaround.