HAL component for tangential knife

rodw wrote:

@Tommy, add FOR TANGENTAL KNIFE to the title

 

Done, thank you.

DEAR Sir, it is great work and i hope to learn alot of you , that was very deep in the CNC FOUNDATION, I am now in need to use my machine and the level of mach3 is very suffecient to me , so what do you recommend to achieve this level now and i hope to join your effort of your project that i hope to learn much of you , thank you sir

Just be patient, I started from scratch today and got the framework working but some of the data is  incorrect.
In the mean time, learn how to build linuxcnc as a RUN IN PLACE version for testing
When I get a bit further, you will be able to clone my git repository and test it for me.

thank you sir , it is honor to be your student , but i hope to guide me to improve my skills in real-time c programming and the linuxcnc kernal , i am really surprised about it , i feel like in the temple itself

Thanks, I don't know how good a teacher I will be...
I'm almost there on my state_tag_arcs branch at  github.com/rodw-au/linuxcnc

I've got all of the calculations tested and working in the interpreter. For some reason, data is getting lost on its way to motion. I will troubleshoot that in the next day or so.

Its been more complicated than I remember. I've got a better method of setting the tags but they are only updated at the beginning of a gcode segment but we want to get real time headings all the way around a G2/G3 arc. To do this, I needed to calculate the heading in real time (eg with the servo thread) in motion. No wonder no-one has tried to do this before!

 

sir , i am sure of hoe good teacher you are that i follow your work
i see that you are doing very well in your path and sure you will solve the problem , i am trying to think systematically when i say that the loss of the data may be because deffirent time frams between the sender and reciever or the sequencing -sorry about the terms are not accurate , i am a beginner- hope this might help , it is enough to me now to run a customed component to do the job , i am struggling to make it , its performance like mach3 feature is great now , i hope you help me to do such component , i have just made one and compield it but it crashed because of syntax error , i used a c code with primary approach
angle = atan2(y-vel, x-vel)
y-vel = y-vel + y-acc * dt // dt = fperiod
x-vel = x-vel + x-acc * dt // dt = fperiod
for open loop machine - stepper motors