Re: [CAD_CAM_EDM_DRO] EMC and freqmod

Glad to hear that freqmod is for open loop control. I can't quite get
the speed I wanted out of steppermod.

EMC starts up fine in freqmod but whenever I move any of the axis I get
a following error and the control shuts off. The only thing I changed in
the ini file after successfully running steppermod was steppermod to
freqmod and put PERIOD = .000016 back in.

Thanks,
Terry

Tim Goldstein wrote:

>
> > -----Original Message-----
> > Is the EMC freqmod used only for closed loop stepper control or will it
> > work on a simple open loop system? I was successful running steppermod
> > but always get following errors when I try the freqmod.
>
> Freqmod is for open loop steppers, but with an improved (but more resource
> intensive) task generating the pulse timing. There is another module that if
> I remember correctly has dro in the name which is for closed loop steppers
> (If you look at the read me from about Feb. 2000 you will find mention of
> it). It is based on freqmod, but is distinctly different.
>
> Missed getting the error message. If you send it we can probably get this
> figure out real quick.
>
> > Also, I am having a problem with my RTLinux. After booting my system I
> > can run EMC fine for about an hour then system response starts to slow
> > down eventually coming to a complete stop. I have to do a hard reset of
> > the system and can run for another hour or so. Memory leak in the RT
> > system?
> >
> > I am using RedHat 5.2, with upgraded kernel headers and source from the
> > RedHat site.
> > kernel-headers-2_0_36-3_i386.rpm
> > kerner-source-2_0_36-3_i386.rpm
> > Real Time patch release 9.
> > EMC 07-June-2000
>
> You will need one of the Linux gurus for this. I always used the kernel
> filed on the RedHat 5.2 CD and never had problems. Suggest moving to the BDI
> now.
>
> Tim
> [Denver, CO]