Differents PID´s for differents velocities

Hello,

Maybe it is an stupid post, but im working with mechanich offsets a of 0.35 mm more or less. Im getting mad trying to adjust the PID for making the system stable, its very difficult to find a good PID configuration for all the posible velocities of machining.

I can make the system enough stable for single velocities of machining, but when i change the velocity of movement (jog for example) it gets unestable at all.


I dont know if there is any component able to change the PID values when changing the velocity of movement. Or something like this.

It would be great if for example i can do this:

For F from 0 to 100:

pid.0.Pgain 6
pid.0.Igain 0
pid.0.Dgain 0.5

For F from 100 to 200:

pid.0.Pgain 8
pid.0.Igain 0
pid.0.Dgain 1

.....

and so on

Thank you very much and regards.

Hi Andy,

Im trying to install the component, but i cant.

I cant install it with sudo comp, i tried to install a component made by you in the past too and i couldnt, it was called wheel.comp, do u remember??

To install wheel.comp i compiled linuxcnc in another folder with this new component placed in build/src/hal/components/ and copied wheel.ko in the folder of the real linuxcnc. It worked fine.

Now im trying to compile it again with lincurve.comp in the same folder, but it doestn create the lincurve.ko file.

It says:
ValueError: need more than 1 value to unpack

Do you have any idea of what im doing wrong??

Thank you and regards!!

Hello,

I´ll check it tomorrow.

Thank you.

I see the linuxcnc installed,
but linuxcnc-dev is not installed.

Can i install it without removing the linuxcnc i have installed now??

Thank you.

Hi again,

I have insttal the dev-package. Now i can use "comp" but it continues giving the same error, i copy paste for you:

pablo@Pablo-cnc:~/carpetaNuestra/build/src/hal/components$ comp --compile lincurve.comp
Traceback (most recent call last):
File "/usr/bin/comp", line 1335, in <module>
main()
File "/usr/bin/comp", line 1304, in main
process(f, mode, outfile)
File "/usr/bin/comp", line 1178, in process
a, b = parse(filename)
File "/usr/bin/comp", line 411, in parse
a, b = f.split("\n;;\n", 1)
ValueError: need more than 1 value to unpack
pablo@Pablo-cnc:~/carpetaNuestra/build/src/hal/components$

Maybe the component is not compatible with my version of linuxcnc. Actually im using the 2.5.0 version

Thank you.

Ok,

I have been trying to put the full path, go to the real folder of the file and so.

I think the problem isn´t that it cant find the file, because i try to put for example:

sudo comp -- install lincurve2.comp

and it says No such file or directory : `lincurve2.comp`

instead of Need more than 1 value to unpack

Thank you.