Hello
I'm student want to study CNCcontroller
I'm using LinuxCNC 2.8. on commercial gantry(H-type) CNC system was consist of dual servo motor
And I can run LinuxCNC with commercial gantry system
but, I can just run it.
Now, I want know about my system Identification
So I have to run the CNC with sine wave with various sine wave.
But, I can't command sine wave to LinuxCNC
I think I can use siggen or G-code for direct command similar with sine wave
How can I position or velocity command with sine wave to LinuxCNC ????????????
As for me, your topic is unclear.
1. It doesn't matter what gantry property is..
2. what is system identification do you mean?
"So I have to run the CNC with sine wave with various sine wave."
3. Do you know how many sine waves you need? I even not ask for what purpose you need them.
System Identification is required to see the dynamic characteristics of the system.
I want to get the ability to respond according to commands (for drawing bode plot)
this is mean system identification
To do this, I have to change the frequency of the sine wave according to time and apply it to the velocity(or position) command
finally I can get response ability from data.
This is really just a stab in the dark:
If you make a gcode that commands a circle to be cut then one axis moves according to the sine and the other to the cosine. If you need to adjust the frequency of that then you would need to adjust the feed rate. If you need to adjust the frequency dynamically then you can use feed override while the machine moves.
Amplitude would be adjusted by making the circle bigger or smaller.
