Re: EMC/STG II homing problem

["Les Watts" <leswatts-at-rabun.net>]

Hi Max, list.

Yes I checked your posts of a while back and saw some
discussion.

So far I am told that the immediate solution for me is to get
the file newstgmod.o that is supposed to take care of this.
It seems that STG II WILL NOT home properly with the
other files like stg2mod.o and stg8mod.o.

I am a BDI user unfamiliar with compiling source code
using GNU. I am pretty unfamiliar with Linux as well.

Aparently the c source and header files reside on the latest
CVS repository. I must try to download them (on a windows computer) and run
the script file (what is the name?) to do a
build that includes newstgmod.o.

I dearly wish I just had the object file and could copy it into
the proper directory and call it from the .ini if that is possible.

Otherwise the big machine is performing well with EMC.
I have been running some g-code and it is good to see
that 1000 lb gantry whizzing back and forth. Fast accelerations are using 20
amp jabs of current on  the
x-axis. The SEM motor for x has a shroud and cooling
fan on it to up its continuous torque rating to a proper value.
I have PID roughed in pretty well and will play with feedforward soon. I am
not convinced that p gain on
EMC does much other than add motor whine though.
I have discussed that before. I will do some impulse
or step responses as soon as I have the gear set up.
The EMC logging feature seems to be writing garbage
to the log file.

Les
Leslie Watts
L M Watts Furniture
Tiger, Georgia USA
http://www.rabun.net/~leswatts/wattsfurniturewp.html
----- Original Message -----
From: "Maximilian HEISE" <heise-at-univ-tln.fr>
To: "Multiple recipients of list" <emc-at-nist.gov>
Sent: Friday, March 08, 2002 6:55 AM
Subject: Re: EMC/STG II homing problem


>
> Hello EMC folks,
>
> I while (~few months) back I replied to somebody about the same problem.
> Has anyone checked my comments, I was about a return value not being
> checked in emcmot.c, I think it was tpAbort in one of the homing phases.
>
> I am sorry than I can not provide more info, but I will not have access
> to my computers for I will stay half a year at the university of Toulon,
> France.
>
> Regards
> Max
>
>
> Melvyn J. Marple wrote:
>
> > Hi Les,
> >
> > This seems to be a problem that comes up from time to time. I discovered
the
> > same (or what appears to be) problem almost two years ago when
interfacing
> > EMC
> > and a STG II card to a Hurco mill. It seemed in my case that the index
pulse
> > was not recognized by EMC. Just as in your case, everything
hardware-wise
> > seemed to be there. My work around was to un comment the NO_INDEX_PULSE
in
> > the extstgmot.c module and recompile. This makes the software ignore the
> > index pulse
> > for homing and therefor a little less accurate. I still would like to
see a
> > solution
> > but have not seen anyone put forth such. See the thread around the
9/21/01
> > for more.
> >
> > Regards, Mel
> >
> >
> >
> >>[Original Message]
> >>From: Les Watts <leswatts-at-rabun.net>
> >>To: Multiple recipients of list <emc-at-nist.gov>
> >>
> >  > Date: 3/6/02 3:49:41 PM
> >
> >>Subject: Re: EMC/STG II  homing problem
> >>
> >>
> >>Hi George!
> >>
> >>Yep I tested all inputs to the card with the scope.
> >>Got good signals. I expected this as the diagnostic program
> >>sees the switches and index fine.
> >>
> >>I have roughed in pid an run some g-code programs today
> >>with no problems.
> >>
> >>It is not the end of the world if the homing function does not
> >>work.... but it's not good!
> >>
> >>I can drive the axes into a hard stop at low gains and restart
> >>EMC for the time being to get a home.
> >>
> >>Gotta find out what's wrong.
> >>
> >>Les
> >>
> >>Leslie Watts
> >>L M Watts Furniture
> >>Tiger, Georgia USA
> >>http://www.rabun.net/~leswatts/wattsfurniturewp.html
> >>----- Original Message -----
> >>From: "George P. Tecos" <george.tecos-at-panautosys.com>
> >>To: "Multiple recipients of list" <emc-at-nist.gov>
> >>Sent: Wednesday, March 06, 2002 2:20 PM
> >>Subject: Re: EMC/STG II homing problem
> >>
> >>
> >>
> >>>   Hi Les:
> >>>  I have been reading your e-mail and I sympathize with
> >>>the problem of homing. I do not know if  this can help you
> >>>or not. Install your scope at the inputs 47, 39 ,31 and try to
> >>>close or open the home limit switches at that time observe
> >>>if the states of the inputs change ;if they do, then maybe you
> >>>have to check the software.Just an idea.
> >>>Good luck.
> >>>George Tecos
> >>>
> >>
> >
> >
> >
> > --- Melvyn J. Marple
> > --- marplem-at-ix.netcom.com
> > --- EarthLink: It's your Internet.
> >
> >
> >
> >
> >
>
>
> --
> Maximilian HEISE
> max.heise-at-gmx.net, heise-at-univ-tln.fr (02.2002->08.2002)
> Student Mechatronik/Automatisierungstechnik/PDV
> FHT Esslingen - Hochschule fuer Technik
> PGP Public Key from:
> http://www.fht-esslingen.de/~mahemt01/pgp50i.pub or any keyserver
>
>
>