Base Thread speed

How slow can you run the base thread. I only use it for a couple of hand encoders and when you run full tilt it slows the interface down.
when I try to run it almost as slow as the servo thread it will not load. Right now I am twice the speed of the servo thread and it works but is a wast of cycles.
I have tried to run encoder on the servo thread but it will not run there. suggestions or comments.


Jim

Why not just run the encoder in the servo thread?
(unless the count rate is too high for the servo thread)

How slow can you run the base thread.

The base-thread is just a name, if you don't use it for anything else it can be much slower.

when I try to run it almost as slow as the servo thread it will not load.

You will need to experiment more probably.

The fastest thread must be declared first, but there is rounding off of numbers involved so putting 999999 and 1000000 say will not work.

Run the resulting config from a terminal and you should get an error message if it does not load.

regards

This touches on and links to another way to start and use threads, rather than using the hard coded base / servo mechanism in the ini file

www.linuxcnc.org/index.php/english/forum...-amp-frequency#52555

However if you need it faster than the servo thread, it may be easiest to stick with the default creations and play with the speeds in the ini file

regards

I tried to add both
encoder.capture-position
encoder.update-counters
to the servo thread

I would receive an error on start up. (Some type of floating point error)
So I added the base thread to the start up.
I am currently running the base thread at double the speed of the servo thread. Slower seems to give errors on start up.
But I would like to eliminate it completely as it is not really needed. The encoders are real slow.

Jim

Hmm the encoder comp works with servo thread for me... what version of linuxcnc are you running?

2.6.7

This works for me in 2.6.7:


I also verified that the software encoders count properly using
servo thread for both functions by setp'ing the A and B pins