Re: Position counter stop updating....

[Paul <paul.corner-at-tesco.net>]

Hi Babar

I wouldn't recommend running all the processes (Sections) at such a high 
rate. The DISPLAY is a low priority task that will happily run at 0.200 
seconds. AXIS_x should be run at least 10x the speed of TRAJ, certainly not 
at the same rate.
Unless you have a fast computer, you will find that running all the tasks at 
0.001 seconds will impact on the overall speed of linux - Jerky mouse and 
unresponsive keyboard, possibly even the whole machine locking up.

The problems you are having with the encoders sounds very much like noise 
induced from the servo motor cables. You mentioned in an earlier post that 
the problem arose with 3V (command voltage to servo amp) or more, along with 
the erratic "pulse stream" - This certainly appears to be a noise problem 
either from a ground loop or induced from the motor wiring.

Regards, Paul.



On Monday 02 Sep 2002 12:34 pm, Babar wrote:
> We are using STG-II board the latest version of stg.
> Does these still have this noise problem with their
> Position counters??
>
> After reading Jon's mail I got into my ini and looked
> for CYCLE_TIME variable. It was found that this
> variable is present
> in many sections:
> [DISPLAY]
> [TASK]
> [TRAJ]
> [AXIS_X]
> [EMCIO]
>
> I had set this to .001 to task, traj, and to all three
> AXIS_X but still having the same problem.