Re: are homed axes active and enabled?

[Till Franitza <till.franitza-at-isw.uni-stuttgart.de>]

Keith,
thank you for your help1
I have now found out that it was my own fault. It still had something to
do with the index pulse. I commented some things out that i shouldnt
have. I only had to put them in again. My machine is running now. I will
send another anouncement about that on the list.
Till 

Keith Rumley wrote:
> 
> Till,
> 
>     I ran into something similar with my 3-axis STG2  & Emerson FX490 setup.
> I could easily move the axes by hand, even when 'enabled', until a
> 'following' error occurred (MIN_FERROR). I tried emcpanel to set the output
> voltages manually and had the same result. The proper distance did show on
> the screen, however.
>     Turns out that my amp has its' own logic, and was set to 'Analog Torque'
> mode, where input voltage was interpreted as a torque value. I had P values
> of 8,000 before it'd hold position, but it was obviously somewhat choppy! At
> P=150 it would do nothing. (I even had it running at P=20,000)
>     I had to change a setting on the amp (FX-490) to read the voltage as a
> velocity command, and lower the P factor down to sane limits. It worked like
> a charm. (Of course, this was after I spent hours scanning e-mail posts and
> EMC code in vain!)
> 
>  HTH,
> 
> Keith
> 
> ----- Original Message -----
> From: "Till Franitza" <till.franitza-at-isw.uni-stuttgart.de>
> To: "Multiple recipients of list" <emc-at-nist.gov>
> Sent: Tuesday, October 02, 2001 9:51 AM
> Subject: are homed axes active and enabled?
> 
> >
> > Hallo Developers!
> > Nobody had an idea about my message "running without moving". Now I made
> > a new observation:
> > any axis that is homed stops bein controlled. PID-Calculation seem to be
> > stopped. Even the position is not updated in the display when i turn the
> > axis by hand. still, the amplifier remains enabled. So, one solution is
> > that the PID IS active, but the counters are simply not read. I was
> > searching in the code but didnt find the solution yet. I will keep
> > searching until i find out or until one of you tells me the solution.
> > What is the difference between Enabled and active?
> > Thank you!
> > Till
> >
> > --
> > Dipl.-Ing. Till Franitza
> > Institute for Control Engineering of Machine Tools and
> > Manufacturing Units (ISW)
> > c.o. FISW
> > Rosenbergstr. 28
> > D- 70174 Stuttgart
> > Germany
> >
> > phone: ++49 (0)711 22 99 2-28
> > fax:   ++49 (0)711 22 99 2-22
> > email: till.franitza-at-isw.uni-stuttgart.de
> > web:   www.isw.uni-stuttgart.de
> >
> >
> 
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-- 
Dipl.-Ing. Till Franitza
Institute for Control Engineering of Machine Tools and
Manufacturing Units (ISW) 
c.o. FISW
Rosenbergstr. 28
D- 70174 Stuttgart
Germany

phone: ++49 (0)711 22 99 2-28
fax:   ++49 (0)711 22 99 2-22
email: till.franitza-at-isw.uni-stuttgart.de
web:   www.isw.uni-stuttgart.de