Re: [CAD_CAM_EDM_DRO] EMC

On Thu Mar 28 22:40:36 2002, Jon Elson, <elson@...> wrote:

>Scott Hendershot wrote:
>
>> I have more questions about using EMC. When I log in as a user and click on one of icons on the desktop to launch EMC I get the EMC splash screen for a few seconds, then it goes away and nothing else happens. If I start emc.run from a console window I can see that it starts to load up but then I get several messages about permissions and the application fails.
>
>You have to be logged in a ROOT, or another acount with system priveledges, or
>set up the appropriate files with root priveledges, as they access physical hardware.
>
>> If I log in as root I can run emc.run but the application is slow. The mouse becomes unresponsive for several seconds at a time and the screen updates may take several seconds as well. This machine is a pentium II 233MHz. Does emc just run that slow? Would the performance be acceptable if run as a regular user instead of root?
>
>You have a marginal CPU for running EMC with steppers. It is definitely too slow for
>freqmod.o, but can be used with steppermod.o
>
>However, you need to slow down the interrupt service rate. With freqmod.o,
>this is PERIOD in the [EMCMOT] section of the .ini file. You would make it a
>larger number, in modest increments. For steppermod.o, it is the CYCLE_TIME
>parameter, in EACH axis of the [AXIS_n] sections. These are in seconds,
>and again, increase it in modest increments. But, this should be evenly divisible
>into the TASK_CYCLE_TIME.
>
>EMC is running, what is happening is that the real-time component needs
>nearly 100% of the CPU as you have it set, and doesn't leave enough for the
>GUI and other tasks. Regular user / root makes no difference in performance.
>
>Jon

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